Epson Emp s1 s1h

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EMP-S1 (SVGA)

EMP-S1H (SVGA)

Service Manual

Mult i Media Projecto r


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EMP-S1/S1H

SE IKO EPSON Rev is io n :C

INTRODUCTIONThis Service Manual describes of the hardware information which is necessary for the smoothfield service of the MULTI MEDIA PROJECTOR EMP-S1/S1H (SVGA) and the trouble shooting.As the primary technologies modification will be supplied with the Technical Information bulletins,you may update this manual.

HOW TO USE THE SERVICE MANUALSince the service manual describes the topics which may be required in the field maintenance, you mayutilize this for repair or diagnosis of failures. The contents are as following.Before you start the maintenance service, read every safety precautions and observe safety precautions

and observe safety rules.

VCCI RADIO FREQUENCY INTERFERENCE SELF RESTRICTIONThis product is the type 1 information equipment and uses radio frequency energy and fully complieswith the limits for the specifications in the computer information equipment radio interference regula-tion (VCCI rules). If not installed and used properly manufacturer’s instructions, may cause interfer-ence to radio and television reception.

TRADEMARKEPSON is the trademark of SEIKO EPSON CORPORATION.

NOTICES1. This document should not be reproduced in whole or in part without the written permission of

SEIKO EPSON CORPORATION.

2. Any of description in this document is the subject to change without notice in future.

3. The information and specification in this document are the most up-to-date at the time of publication.

However, we are unable to guarantee the accuracy of printed material after the date of publication. In

case of any mistake or lack of description, please kindly notify us to correct.

4. Any influence by utilizing the document may be out of our responsibility regardless the item 3

above.

2004 SEIKO EPSON CORPORATION

precautions : SAFETY,MAINTENANCE,PERSON

chapter 1 : GENERAL (PART NAME, SYSTEM FUNCTION, SPECIFICATION, etc.)

chapter 2 : THEORY OF OPERATION (HARDWARE,INTERNAL CONNECTION, FUNC-TION OF UNITS, etc.)

chapter 3 : TROUBLE SHOOTING

chapter 4 : DISASSEMBLE & ASSEMBLE (ASSEMBLY PROCESS FOR MAIN FRAME)

chapter 5 : Appendix


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Manual Revision History

Service memoMake a note here of important technical information from Technical Information bulletins.

History Date Detail of change

Rev.A May 1, 2003 Initial draft

Rev.B 26,2004 Addition of EMP-S1H

Rev.C June 10,2004 Correction of the clerical error of "SAFETY TESTING"


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SAFETY INSTRUCTIONS

1. MAINTAINING OPERATOR SAFETY

(1). PREVENTING ELECTRIC SHOCKS

• Turn off the power switch and disconnect the power cord from the AC outlet before carrying out

any disassembly and assembly work on this projector.• If power needs to be supplied to the projector while the cover is removed (such as when making

adjustments), take off any metallic objects such as wristwatches, shirt cuff buttons, rings and tie

pins which may pose the danger of coming into contact with the projector.

(2). PREVENTING INJURY

• Projector components such as the lamp inner housing and the area around it may still remain hot

after the power has been turned off, even when the cool-down period is compete. Furthermore, if

removing the cover in order to carry out adjustments while power is being supplied to the projector,

be careful not to touch the fans (intake and exhaust).

• Always wear gloves when disassembling and reassembling the scanner in order to avoid injury

from metallic parts with sharp edges.• Do not look directly into the projector's lens while power is being supplied to the projector, other-

wise injury to the eyes may occur.

(3). PREVENTING ACCIDENTS

• Place the projector on a stable, level surface when carrying out any repair or adjustment work, to

prevent the projector and its components from slipping and falling down. Furthermore, do not

place any tools or projector components on top of or underneath the projector.

• Avoid working on the projector in places where other people might receive injuries from touching

the projector while it is in a state of disassembly. Furthermore, do not leave the projector unat-

tended in the workplace at such times.

• When turning on the projector's power, always use the accessory power cord to connect the projec-

tor to the power supply, and always make sure that the power supply is properly grounded.

2. MAINTAINING THE PROJECTOR IN GOOD CONDITION

(1). PREVENTING STATIC ELECTRICAL DAMAGE

• When disassembling and assembling the projector, always use a grounding strap and a grounding

mat. Furthermore, when replacing electrical circuit components (such as circuit boards and optical

engine), touch the static-proof bag containing the new parts against a metallic section of the projec-

tor before removing the component from the static-proof bag.

(2). USE OF GENUINE PARTS

• When replacing the structural components inside the projector (including the lamp inner housing),

use only replacement parts supplied by EPSON and listed in the projector's Parts List.• Use the accessory power cord and interface cable provided with the projector.

(3). SAFETY TESTING

• The following tests should be carried out on repair parts used in the LCP.

* These are simplified tests that can be carried out at a repair centre that is not equipped with fullsafety testing equipment.

(3-1).Test items

• Insulation resistance test

• Illumination check


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(3-2).Testing procedure

Carry out testing in the order given below.

(3-3).Testing methods

1). Insulation resistance test

Repair EndInsulation resistance test

Safety inspections

Illumination check

Testing apparatus: Insulation ohmmeter (Rating: 500 V/100 MΩ)

Check item Inspection method Standard/Judgment level

Insulation ohmmeter Insulation resistanceshould be 10 MΩ or more

Insulation ohmmeter settings

c

! Caution:

Because high voltages (500 V)

are present, do not touch the

probe during testing.

(1)

(2)

1. Set the range selection switch to 500 V.

2. Connect the black lead wire to the ground terminal.

3. Connect the red lead wire to the line terminal.

4. Connect the black lead wire (crocodile clip) to c in order to

measure the insulation resistance (1) (between a and c) in the

diagram below.

5. Next, insert the probe of the red lead wire into a.

6. Set the measure switch to LOCK, and then measure the insula-

tion resistance after 1 minute.

7. Check that the insulation resistance after 1 minute is 10 MΩ or

more.

8. Next, measure the insulation resistance at (2) (between b and

c) in the diagram below in the same way as for (1).

9. Check that the insulation resistance at (2) after 1 minute is 10

MΩ or more.

Ground terminal

Line terminal

Display

Measure switch

Range selection switch

Power supply

Projector AC inlet

Exposed metal part of projector Computer connector

lines


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2). Illumination check

• Test conditions: Input a PC or video signal to the LCP and check the illumination for about 5

minutes.

• Judgment: Projector should operate normally with no smoke or fire.

3). Other

• Check that the connectors at both ends of the power cord are not dirty or bent, and clean them if

they are dirty. Furthermore, if there is any noticeable discoloration on the power cord, it should be

replaced (to prevent the chance of fire due to flashover).

• When connecting the connector cables and interface cables inside the projector, make sure that the

cable connectors are pushed on as far as they will go.

• To prevent problems caused by dirt getting into the optical system, always disassemble and assem-

ble the projector in an area which is free from floating dust.

• When disconnecting the cable connected to CN400 of the MA board assembly and CN600 of the IF

board assembly from the board connectors, release the connector locks. (When releasing the con-

nector lock, push up both ends of the connector simultaneously with tweezers or like.)

• When disconnecting the three FPC cables for the light valves from their connectors, release the

connector locks first.

Enlarged view

Locked

Unlocked

CN400

connector lock Locked Unlocked


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3. NECESSARY REQUIREMENTS FOR SERVICE TECHNICIANS• Service technicians who carry out repairs and servicing work on the EMP-S1/S1H must possess the

following knowledge and abilities.

• The service technician must have read and fully understood the contents of this Service Manual

(such as the working procedures).

• The service technician must have a fundamental knowledge of working with electricity (safety pro-

cedures, knowledge regarding electrical circuits, and knowledge regarding static electricity).

4. OTHER• Any questions regarding repairs and service to this projector (such as supply of parts and the con-

tents of this Service Manual) should be directed to EPSON at the address below. Furthermore,

information regarding matters such as technical changes to the projector are released when neces-

sary in the form of Technical Information bulletins, and these should be referred to also.

SEIKO EPSON CORPORATIONADDRESS 4897 OH-AZA SIMAUCHI,MATSUMOTO-SHI,

NAGANO-KEN,390-8640 JAPANTEL. 81-263-48-5437FAX. 81-263-48-5680SECTION VD,CS Quality Assurance Department


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Chapter 1 Product General

1.1. PRODUCT GENERAL ............................................................................ 1-2

1.2. PART NAME ........................................................................................... 1-3

1.2.1. Outside ............................................................................................ 1-3

1.2.2. Internal components ........................................................................ 1-6

1.2.3. Remote control ................................................................................ 1-7

1.3. SPECIFICATIONS .................................................................................. 1-8

1.4. INTERFACE SPECIFICATIONS........................................................... 1-10

1.4.1. Computer Interface, Monitor Out Interface.................................... 1-10

1.4.2. RS-232C........................................................................................ 1-11

1.4.3. Video Interface .............................................................................. 1-11

1.4.4. S-Video Interface........................................................................... 1-11

1.4.5. Audio input Interface ..................................................................... 1-12

1.5. EXTERNAL VIEWS ..............................................................................1-13

Chapter 2 Theory OF Operation

2.1. OVERVIEW OF HARDWARE................................................................. 2-2

2.1.1. Circuit System Component Connection Diagram............................ 2-3

2.1.2. Circuit Block .................................................................................... 2-4

2.1.3. Optical Engine ................................................................................. 2-5

2.1.4. Lamp inner unit................................................................................ 2-6

2.2. MA BOARD ASSEMBLY ........................................................................2-8

2.2.1. Appearance of MA Board ................................................................ 2-82.2.2. MA Board Circuit Block ................................................................... 2-9

2.2.3. Overview of Operation................................................................... 2-10

2.3. IF BOARD ASSEMBLY......................................................................... 2-11

2.4. RC BOARD ASSEMBLY....................................................................... 2-12

2.5. LED INDICATOR .................................................................................. 2-13

2.6. POWER SUPPLY UNIT........................................................................ 2-15

2.7. BALLAST UNIT..................................................................................... 2-18

2.8. SPEAKER ............................................................................................. 2-19

2.9. TEMPERATURE CONTROL ................................................................2-20

2.9.1. Sensors and Switches................................................................... 2-20

2.10. FAN OPERATION............................................................................... 2-23

Chapter 3 Troubleshooting

3.1. BEFORE CARRYING OUT TROUBLESHOOTING ............................... 3-2

3.1.1. Troubleshooting Tools and Equipment............................................ 3-2

3.1.2. Field Replacement Parts ................................................................. 3-2

3.2. ENTRY.................................................................................................... 3-3

3.2.1. Exterior Checking ............................................................................ 3-4

3.2.2. Internal Cable Check....................................................................... 3-5

3.2.3. Power Supply ON/OFF.................................................................... 3-7

3.2.4. Image display and image quality ..................................................... 3-93.2.5. Audio output .................................................................................. 3-11


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3.2.6. Control panel ................................................................................. 3-12

3.2.7. Remote control operation .............................................................. 3-13

3.2.8. Other ............................................................................................. 3-14

Chapter 4 Disassembly & Assembly4.1. DISASSEMBLY AND ASSEMBLY.......................................................... 4-2

4.2. PROJECTOR DISASSEMBLY AND ASSEMBLY .................................. 4-4

4.2.1. Lens Cap Unit.................................................................................. 4-5

4.2.2. Lamp Inner Unit ............................................................................... 4-6

4.2.3. Air Filter ........................................................................................... 4-7

4.2.4. Foot Unit .......................................................................................... 4-7

4.2.5. R. Control Holder............................................................................. 4-8

4.2.6. Case, Upper .................................................................................... 4-9

4.2.7. Speaker ......................................................................................... 4-10

4.2.8. SW Board Assembly ..................................................................... 4-12

4.2.9. Shield Plate, Lamp ........................................................................4-134.2.10. Shield Plate, MA.......................................................................... 4-14

4.2.11. Panel, IF / Label, IF ..................................................................... 4-14

4.2.12. Main Board Fixing Plate, MA....................................................... 4-18

4.2.13. IF Board Assembly ...................................................................... 4-19

4.2.14. Exhaust Fan Assembly................................................................ 4-20

4.2.15. Lamp Thermistor/Duct, Exhaust Inner/Fan 80/Duct, Exhaust Outer4-21

4.2.16. RC Board Assembly .................................................................... 4-21

4.2.17. Frame, MA Left/Shield Plate, LOW ............................................. 4-22

4.2.18. Power Supply / Ballast Assembly................................................ 4-22

4.2.19. Power Supply / Ballast ................................................................4-24

4.2.20. Power Supply Fan ....................................................................... 4-25

4.2.21. Optical Engine ............................................................................. 4-27

4.2.22. Focus Ring .................................................................................. 4-28

4.2.23. Projection Lens Unit .................................................................... 4-28

4.2.24. Fan 100 ....................................................................................... 4-29

4.2.25. Duct, Intake / Frame, MA Left ..................................................... 4-30

4.2.26. Lamp Cover Detection Switch ..................................................... 4-31

4.2.27. Handle ......................................................................................... 4-32

4.2.28. Foot Rubber ................................................................................4-32

Chapter 5 Appendix5.1. AS (After Service) menu ......................................................................... 5-2

5.1.1. How to display AS (After service) menu.......................................... 5-2

5.1.2. Initializing AS (After Service) menu................................................. 5-4

5.1.3. Software DIP switch ........................................................................ 5-4


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Chapter 1 Product General


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1.1. PRODUCT GENERAL

The EMP-S1/S1H Multimedia Projector is an SVGA-compatible presentation tool developed to enlargeand project color images from personal computers, video equipment (VCRs, video cameras, video disc

players, etc.) .

Features of the Projector

• Brilliant, attractive images

Having a large-diameter lens, high-luminance lamp inner housing (UHE-132W) and optical block,

the EMP-S1 can project images at a brightness of up to 1200lm.

Having a large-diameter lens, high-luminance lamp inner housing (UHE-130W) and optical block,

the EMP-S1H can project images at a brightness of up to 1400lm.

• Full-color, high-resolution capabilities

The projector has three transparent LCD panels (R, G and B), each with 480,000 pixels which can

project images at resolution of up to 800 x 600 dots (approximately 14.40 billion pixels).

• Quiet operation

Quiet operation at levels of 33dB.

• Functions for Enhancing Projection

(1). Easy to Operate

The accessory remote control can be used for operations such as Freeze and E-Zoom. When the

remote control is not used, it can be contained in the rear of the projector.

(2). Keystone correction

The projector can easily correct keystone image distortion.)

(3). Automatic setup

When projecting a computer image, the projector detects the signal from the connected com-

puter and automatically adjusts to the optimum projection conditions.

(4). Color mode function

The images can be projected at the optimum image quality for the projecting environment by

selecting the image quality mode from one of five preset settings.


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1.2. PART NAME

1.2.1. Outside

• Main unit

Figure 1-1

Figure 1-2

Speaker

Control panel

Focus ring

Foot unitLens cover

Handle

Air exhaust vent

Remote controllight-receiving area

Suspension bracket fixing points (3 points)

Lamp lid

Handle

Air filter


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Figure 1-3

• Input and output connectors

Figure 1-4

Power inletSecurity lock

Input and output connectors

Remote control light-receiving area

Remote control forder

L-Audio-R RS-232C

Monitor OutComputer/

Compornent VideoS-Video Video

S-Video port Video portComputer/Compornent Video port

Monitor out port

RS-232C portAudio in port


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• Control Panel

Figure 1-5

[Power] button

Turns the projector on and off. [Menu] button

Displays or hides the configuration menus.

[ ] [ ][ ][ ] buttons

Used as the up/down button to select the item when the Configuration menu or Help is being displayed.

Used as the left/right button to adjust the set value when the Configuration menu or Help is being displayed.

[ ] [ ] : keystone correction buttons

Press to correct keystone distortion in images.

[ Wide ] [ Tele ] : zoom buttons

Used to adjust the projection size.

Warning indicator

Flashes or lights in differentcolours to alert you to problems

with the projector. [Esc] button

Stops the current function.

Displays the previous screen or menu when

viewing configuration menus.

[Source] button

Switches the input source between the

Computer/Component Video port,S-Video port and Video port each time the

button is pressed.

Power indicator

Flashes or lights in different

colours to indicate the operating

status of the projector.

[ ] button

Accepts a menu item or advances to the

next screen or menu when viewing

configuration menus.


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1.2.2. Internal components

Figure 1-6

Control panel

MA board assembly

Lower case

Intake fan

Power supply unit

Ballast unit

Exhaust fan

IF unit

IF panel

Upper case unit

Speaker

Optical engine


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1.2.3. Remote control

• Remote control

Figure 1-7

[Source] buttons

[Computer]: Switches to the signal source

being input to the Computer/Component

Video port.

[S-Video/Video]: Switches between the

signal source being input to the S-Video

port and the Video port.

[Power] button

Turns the projector power on and off.

[Color Mode] button

Selects the colour mode. The colour mode

changes in the order of Dynamic, Presenta-tion, Theatre, Living Room and sRGBg

each time the button is pressed.

[E-zoom] button

[ ] : Enlarges parts of images without

changing the size of the projection area.[ ] : Reduces the parts of images that have

been enlarged using the [ ] button.

Remote control light- emitting area

Outputs remote control signals.

[Aspect] button

Changes the aspect ratio of images from

4:3 to 16:9.

[ ][ ][ ][ ] button

Selects menu items and setting values.

[Menu] button

Displays or hides the configuration menus.

[A/V Mute] button

Momentarily turns off the audio and video.

[Esc] button

Stops the current function.

Displays the previous screen or menu when

viewing configuration menus.

[Auto] button

Use this button to automatically adjust com-

puter images to their optimum settings when

automatic setup has been set to "OFF".

[Freeze] button

Keeps the current computer or video image

on the screen.


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1.3. SPECIFICATIONS

Model name EMP-S1 EMP-S1H

Projection System RGB Liquid Crystal Shutter Projection

System

Projection Method Front / Rear / Ceiling MountSpecification of

main parts

LCD Size 0.5inches with MLA (x3)

Driving Method Poly-silicon TFT Active Matrix

Pixel number 480000 dots (800x600) x3

Native Resolution SVGA

Aspect ratio 4 : 3

Pixel Arrange-

ment

Stripe

Projection Lens Type Manual focus

F-number 1.4

Focal length 16.6mm

Zoom ratio No Optical ZoomDigital Zoom 1.0 to 1.2

Lamp Type 132W UHE 13 W UHE

Life 2000H

Optical System Dichroic Mirror Separation & Prism

combine Method

Screen size (Projected Distance) 30 to 300inch [0.9 to 11.3m]

Keystone correction ratio 9.6 : 1

Brightness 1200 ANSI lumens 1400 ANSI lumens

Contrast 400 : 1 500 : 1

Brightness Uniformity 85% (Typ.)

Color reproduction Full Color (16.77million colors)Sound output 1W Monaural

Effective Scan-

ning Frequency

Range

(Analog)

Pixel Clock 13.5MHz to 162MHz

Horizontal 15KHz to 92KHz

Vertical 50Hz to 85Hz

Adjustment

Function

Projector / Remote Control Keystone (Vertical)/ Brightness/ Con-

trast/ Tint/ Saturation/ Sound/ Input sig-

nal etc.

Tilt Angle 0 to 10 degrees

Keystone Correction Vertical: -15 to +15 degrees,


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Analog RGB I/O Display

Performance

Native 800 x 600 dots

Resize 1024 x 768 dots / 640 x 480 dots

Input Signal Signal type Separate signal

Video Signal Analog (0.7Vp-p, 75ohm/ Mac0.714Vp-

p, 75ohm)

Sync. Signal Separate (positive & negative, bi-polar-ity 2-5Vp-p)/

Composite (positive & negative, bi-

polarity 2-5Vp-p)/

Sync-on-green (negative, 0.3Vp-p)

Audio Signal 500mVrms / 47Kohm

Input Terminal Video Mini D-sub 15pin x1

Audio RCA x2 (White/Red)

Output Signal Signal type Not analog-RGB standard level

Output Termi-

nal

Video Mini D-sub 15pin x1

Audio Stereo mini jack

Video I/O Display Performance NTSC: 550 line, PAL: 550 line (Depend

on observation of the multi burst pattern)

Input Signal Video Standard NTSC / NTSC4.43 / PAL / M-PAL / N-

PAL / PAL60 / SECAM

Video signal Composite Video (1.0Vp-p/ Sync. nega-

tive, 75ohm) /

S-Video (Luminous 0.714Vp-p, Chromi-

nous 0.286Vp-p, 75ohm) /

Component Video (Analog Y level 0.7V

75ohm/ Cr Cb level +/-0.35V, 75ohm/

sync. negative 0.3V or 3-state+/-0.3V on

Y) /

Video-RGB (0.7Vp-p, 75ohm/ Mac

0.714Vp-p, 75ohm)

Audio signal 500mVrms / 47Kohm

Input Terminal Video Composite Video: RCA x1

S-Video: Mini DIN

Component Video: Mini D-sub 15pin

(in common with Analog RGB connec-

tor)

Video-RGB: Mini D-sub 15pin

(in common with Analog RGB connec-

tor)

Audio RCA x1

Control I/O I/O Terminal USB connector series B x1 (for mouse,

K/B, control)

Operating Temperature 5°C to 35°C

Cool-down period about 20 seconds

Start-up period about 40 seconds

Power Supply Voltage EMP-S1 (100V) 100-120V ±10%, 50/60Hz AC

EMP-S1 (200V) 200-240V ±10%, 50/60Hz AC -

Power

Consumption

JAPAN EMP-S1 (100V) 180W (5W at Srandby mode) 200W (5W at Srandby

mode)

- -

Except JAPAN EMP-S1 (100V) 100 - 120V 2.7A 50/60Hz 200W (5W at Srandby

mode)

EMP-S1 (200V) 200 - 240V 1.3A 50/60Hz 200W (5W at Srandby

mode)


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Dimension Exclude Projection lens & Feet 265 (D) x 370 (W) x 106 (H) mm

Maximum dimension 265 (D) x 370 (W) x 114 (H) mm

Weight Approx. 7.0lbs / 3.2Kg

Fan Noise 33dB

Accessories Power cord 1.8m

Computer cable 1.8m, Mini D-sub 15pin (Male) - MiniD-sub 15pin (Male)

Audio cable No

Mouse cable No

Remote Control Card type

EPSON Presentation Remote Con-

trol Kit

attached

Soft Carrying Bag attached

Air filter 1 pcs.


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1.4. INTERFACE SPECIFICATIONS

Figure 1-8

1.4.1. Computer Interface, Monitor Out Interface

HD D-sub, 15pin

Pin No. Pin name Pin No. Pin name

1 Red video signal 9 (None) (No pin)

2 Green video signal 10 Sync GND

3 Blue video signal 11 GND

4 GND 12 SDA

5 GND 13 Horizontal sync/

composite

sync signal

6 GND 14 Vertical sync7 GND 15 SCL

8 GND

L-Audio-R RS-232C

Monitor OutComputer /


1511

10651

CN100: Computer Interface7513S-15G2-08

CN102: Monitor Out Interface7513S-15G2


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1.4.2. RS-232C

D-Sub, 9pin

1.4.3. Video Interface

CVBS (Yellow)

1.4.4. S-Video Interface

4 pin

5196

Pin No. Signal name

1 CD

2 RXD (Receive Data)

3 TXD (Transmit Data)

4 DTR

5 GND

6 DSR

7 RTS (Request To Send)

8 CTS (Clear To Send)

9 RI

CN30007511P-09G2

1

2

DGND

Pin No. Signal name

1 GND

2 CVBS

J200HTJ-032-05BY

CVBS (Yellow)

1

34

2

6 5

Pin No. Signal name

1, 2, 6 GND

3 Y signal input

4 C signal input

5 Input detect pin

CN200TCN7708-012021


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1.4.5. Audio input Interface

4

3

2

1

DGND

Pin No. Signal name

1, 3 GND

2 Audio input R

4 Audio input L

CN200: Audio Input (S-Video, BNC) InterfaceHTP-252V1-06

L (White)

R (Red)


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1.5. EXTERNAL VIEWS

Figure 1-9

1 1 .

1

1

1

1

411

5 .

5

5

5

170.70

104.404 4

1 8 .

3

1

8

3

7 9 . 5

7

9

5

2 82

8

8 4 .

5

8

4

5

4 24

2

4 4 .

5

4

4

5

1 5 .

6

1

5

6

1 8 .

2

1

8

2

5 8 . 9

5

8

9

7 6 .

6

7

6

6

6 2 .

4

6

2

4

9 29

2

12424 73.93 9

1

0 8 .

6

1

8

6

1

80.10 1255

106.506 5

8 8 .

5

8

8

5

2 6 4 .

7

2

6

4

7

36969

87.67 642.32 3

14.44 4 133.133 1

8 08

36969

1 1 4

1

1

4

12.62 6

11515 12727

65.15 113.93 9

M4x8-34x8 3

5 8

8

unit: mm


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Chapter 2 Theory OF Operation


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EMP-S1/S1H

2.1. OVERVIEW OF HARDWARE

The hardware for the EMP-S1/S1H can basically be divided into two sections: the optical engine andthe circuit system.This section of the manual describes the configuration block diagram or the hardware and gives an out-line of the functions.The optical engine and MA board in the dotted lines are single parts.

Figure 2-1

Overview of display operation1). The MA board receives RGB/Component signals from the Computer/Component Video interface.

The MA board receives video signals (S-Video or Video) from the Video/S-Video interface. (Analog

signals are converted to digital signals by the MA board.)

2). The display signals (in digital format) are momentarily stored in the video memory on the MA

board, and then the DR board generates signals to drive the R, G and B light valves.

3). The R, G and B light valves control the amount of light which passes through the valves.

4). The light which passes through the light valves is integrated by the prism and is then projected as an

image via the projection lens unit.

Power supply unit

Circuit DC voltagegenerator Ballast outputgenerator

Ballast unitFor lamp innerunit

AC voltage

FAN 80 *2

Lamp inner unit

132 W

Circuit initial setting operations and interfacecontrolInternal operation control (sensors, cooling fan,speaker, remote control, etc.)

R/G/B video signal generation

Control panel

RC receiver sensor

Projection lens uni(focus)

PrismLight valvesR/G/B

Light guide unit

Light source divided into 3components (R, G and B) bylenses, filters and mirrors.

Computer/Component Video

S-Video

Video

Audio

Monitor out

RS-232C

FAN 100 *1

AC input

R/G/B integration

*1: The FAN 100 cools the R, G andB light valves (LCD panels).

*2: The FAN 80 mainly exhaustsheat from the lamp inner unit.

*3: During repair work, the sectionenclosed by the dotted lines shouldbe handled as a single unit.


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EMP-S1/S1H

2.1.1. Circuit System Component Connection Diagram

The circuit system is shown in the following diagram. The various components are connected to theMA board which is the central component of the system.

Figure 2-2

CN1600

RED

CN1400

BLUE

CN1500

GREEN

CN600

24pin

AUDIO IN

J200

PC OUT

CN102

BNC IN

CN100

S-VIDEO IN

CN300

IF board

CN3002

REMOTE

IC3000

RS-232C

CN3000

AUDIO OUT

CN3001

24pinCN400Control

2pin

CN1701

3pin

CN603

Speaker

CN1

RC Board (F)

3pinFan100

CN702

3pin

Fan80

CN704

2pinCN601 Lamp l id

de tec t ion swi tch

4pinCN701 Thermis to r

LAMP

LAMP

CN180034pin

5pin

2pin

CN602

Power supply

Ballastpanel


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EMP-S1/S1H

2.1.2. Circuit Block

The control circuits are shown in the following diagram. The various circuits are connected to the MA board which is the central component of the system.

Figure 2-3

M A B o a r d

V i d e o S W

B A 7 6 5 7 F

( R O H M )

I m a g e P r o c e s s o r

M a i n C P U

F r a m e M e m o r y

R e s i z i n g

F r a m e R a t e C o n v e r s i o n

C o l o r S p a c e C o n v e r s i o n

O S D

P W 1 6 4 B

( P i x e l w o r k s )

A u d i o

C

o n t r o l l e r

T E A 6 3 2 4 T ( P h i l i p s )

G P O R T

D r i v e r A S I C

G

A U G E 4

L e v e l

S h i f t e r

S e r i a l D A C

M 6 2 3 3 4 G P

( M I T S U B I S H I )

A M P

A M P

D E C D r i v e r

D E C D r i v e r

D E C D r i v e r

N R S

L C C O M

I / F C o n t r o l l e r

M e m o r y C o n t r o l

K e y S c a n

D o w n l o a d

P S C I ( E V 9 8 1 6 C B )

( S A N Y O )

I 2 C

VolController

I N T

F L A S H R O M

1 6 M b i t

M B M 2 9 D L 1 6 3 B D

( F u j i t s u )

S R A M

1 M b i t

K E Y M A T R I X

I R

V P O R T

P O W E R S U P P L Y

L A M P B a l l a s t

P O W E R O N / O F F

L A M P S T A T U S

F A N D r i v e r

S e r i a l D A C / A D C

A D T 7 5 1 8 A R Q

( A n a l o g D e v i c e s )

P C / V I D E O I / F

V I D E O

H U M A N I / F

P A N E L D R I V E R B L O C K

C S / W R / R D

C S / W

R / R D

C h r o m a

V P X 3 2 2 6 E

( M i c r o n a s )

2 0 . 2 5 M H z

C V B S

R C A

Y / C

D I N 4

A C I n

R C A x 2

3 R C A

A U D I O

S p

e a k e r

C O M P o r t

P o w e r S u p p l y

C i r c u i t

R S D r i v

e r

D - S u b 9

D D C E E P R

O M

2 4 L C S 2 1 A

( M i c r o c h i p )

S y n c C o

r r e c t e r

" K I M U R A " C i r c u i t

L o g i c

A M P

P C

D S U B 1 5

D D C

S y n c

R G B

D S U B 1 5

R G B

S y n c

M o n i t o r O u t

U A R T

U A R T

T h e r m i s t e r

S C A R T ( S Y N

C )

A D C

3 c h V i d e o A m p

.

3 c h A D C

S y n c . S e p .

A D 9 8 8 3 A

( A n a l o g D e v i c e s

)

L E D


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EMP-S1/S1H

2.1.3. Optical Engine

The optical system consists of four blocks (lamp inner unit, light guide unit, POP unit and projectionlens). A set of four units is called an optical engine.

Figure 2-4

Optical system drive block

Figure 2-5

! Caution:

• The lamp inner unit, light guide unit, pop unit, and projection lens are handled together under the

name of optical engine.

• Do not subject the optical system components to any shocks, and do not disassemble the light guideunit, otherwise color distortion may occur.

• Each component is adjusted at the factory for installation in its particular position.• Furthermore, the data which is used to compensate for optical system characteristics is stored on the

MA board. Accordingly, do not individually replace any of the components with components fromother optical engines.

POP unit

projection lens

Light guide unit

lamp inner unit

Projection lens

Lamp inner unit

Ballast power supply

Prism

( R/G/B integration )

Light valve B

Light guide unit

Optical engine

MA board

(light source)

Light valve R

Light valve G


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EMP-S1/S1H

2.1.4. Lamp inner unit

This unit includes the lamp inner unit (EMP-S1 is UHE-132W. EMP-S1H is UHE-130W.) and ballast

power supply connector. The lamp is a consumable part fastened to the bottom of the projector bodywith 2 screws.The luminance of the lamp inner unit becomes lower over time as the lamp is used. The maximumdegree of luminance is obtained when the lamp is first being used, but after approximately 2000 hoursof usage time, the luminance will drop to about half of this.The ballast power supply connector is usedto supply the AC voltage for driving the lamp to the ballast unit. The lead wires are connected to thelamp.

Figure 2-6

As mentioned above, the luminance of the lamp inner unit becomes lower over time as the lamp is used.This projector's lamp has an operating life of approximately 2000 hours, but it is recommended that youreplace the lamp inner unit before the full 2000-hour period has been reached if it seems that the lumi-nance of the lamp is very low during actual use.

Table 2-1.Component Functions

Component name Function/Other

Lamp inner unit It is a light source for projecting an image.

Light guide unit The light guide unit disperses the light from the light source via lens arrays A and B in

order to provide uniform illumination. In addition, a UV filter removes any harmful ultra-violet light from the LCD. After this light is polarized, it is then split into 3 spectrums (R,

G and B).

POP unit The intensity of the distributed components of the RGB light is controlled by means of

the light valve.

The prism unit integrates the red, green and blue light and sends it through the projection

lens.

Projection lens The image condensed by the prism is projected.

Ballast power supply connector


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EMP-S1/S1H

The cumulative operating time for the lamp inner unit is stored in IC403 (I/F Controller) on the MA board.When the cumulative operating time reaches 2000 hoursThis represents the end of the useful operating life of the lamp. When the lamp is replaced, the lamp

timer should be reset. Use the "Reset Lamp Timer" function in the "About" menu to reset the lamptimer. After replacing the lamp, use the "About" menu to reset the lamp usage time.

The circuit diagram is shown in Figure 2-7.

Figure 2-7 Lamp Inner Unit Control Circuits

• The EMP-S1/S1H has a sleep mode function that will automatically turn off the lamp if no new sig-

nals are input for a continuous period (5, 10 or 30 minutes can be set).

CN602

IC403

(IF-Controller)

CN1800

LED

Power Supply unit

MA board

Ballast unitLamp Inner unit

Blown lamp detection

Ballast output ON/OFF

Fan control

Power supply ON/OFF

Power cut detection


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EMP-S1/S1H

2.2. MA BOARD ASSEMBLY

The MA board carries out the core circuit control for the projector. It includes circuits such as a imaging processor (PW465), ROM (flash ROM/EE-PROM), digitizer (ADC, video decoder, etc.), memory(SRAM), interface controller and operation panel control/temperature sensor circuit/fan control/ballast

power supply control/RC board interface.The MA board carries out all control operations except for display signal generation and audio control.The MA board is regarded as a single unit for servicing purposes.

2.2.1. Appearance of MA Board

Figure 2-8

Figure 2-9

* Different MA boards are used in the two models of projector, and the boards are not interchangeable.

(Front)

(Back)


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EMP-S1/S1H

2.2.2. MA Board Circuit Block

MA board unit circuit block

Figure 2-10

I C 3 0 0

P W 1 6 4 B

I C 4 0 3

I F C P U

I C 4 0 3

C h r o m a

I C 9 0 1

G A U G E 4

C N 7 0 1

C N 6 0 2

C N 1 8 0 0

C N 1 0 0

C N 2 9 0 1

I C 3 0 3

I C 3 0 1

C N 4 0 0

I C 3 0 0 0

I C 1 6 0 0

1 2 C

V o l C o n t r o l

C N 6 0 1

L E D C o n t r o l

R

/ G / B O U T

[ 9

0 ]

R / G / B D O

[ 9

0 ]

D E C D r i v e r

L / V

R S V G A

G S V G A

B S V G A

I C 1 4 0 0

C N 7 0 4

C N 7 0 2

I C 1

C N 3 0 0

J 3 0 0

C N 3 0 0 1

R C - 2 3 2 C

C N 3 0 0 0

M o n i t o r o u t

C N 1 0 2

I C 4 0 4

R S D r i v e r

I C 1 0 5

P I G M O N

I C 1 0 5

P I G M O N

I C 1 0 0

A D C

I C 1 7 0 1

A u d i o C o n t r o l l e r

I C 7 0 1

S e r i a

l D A C

F r a m e M e m o r y

R e s i z i n g

F r a m e R a t e C o n v e r s i o n

C o l o r S p a c e C o n v e r s i o n

O S D

I C 1 1 0 0

I C 1 2 0 0

I C 1 3 0 0

C o n t r o l P a n e l

R e m o t e C o n t r o l l e r

R e c e p t o r ( F r o n t )

R e m o t e C o n t r o l l e r

R e c e p t o r ( R e a r )

F A N 8 0

F A N 1 0 0

L A M P

T h e r m i s t o r

C o m p u t e r /

C o m p o n e n t V i d e

o

S p e a k e r

S - V i d e o

V i d e o

A u d i o

B a l l a s t

u n i t

P o w e r S u p p l y

u n i t

L a m p C o v e r

D e

t e c t i o n

S w

i t c h


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EMP-S1/S1H

2.2.3. Overview of Operation

• Projector controlControls the IF board, RC boards, etc.

• Digitalization control of the convert picture signalConverts the image signals (analog RGB) input from Computer and BNC from analog to digital

form.• Definition transformation control by the digital filter of the input picture signalConverts the resolution of the image signals input from Video and S-Video with the digital filter.

• Frequency transformation control of the input picture signalTransforms the picture signal into the LCD drives picture signal frequency.

• On screen display functionDisplays the menu, EMP link function etc. overlay into the input picture signal.

• Remote controlReceives the remote control signal and do decodes and control the peripheral circuit by the result.

• Lamp controlControls ballast and do the illumination control of the lamp.

• LED controlControls various kinds of Indicator of the operation, temperature, lamps.

• Cooling controlMeasures temperature and control the turn of the fan by the temperature condition.

• Power supply controlThe power supply control function corresponding to low consumption electric power-ization.


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EMP-S1/S1H

2.3. IF BOARD ASSEMBLY

This circuit board includes interface connectors and audio control circuits so that external sources suchas video equipment and computer audio signal sources can be connected to the projector. The IF boardis equipped with the following connectors.

Figure 2-11

Figure 2-12 shows the circuit block diagram for the IF board.

Figure 2-12 IF Board Block Diagram

The audio inputs from the DVI, computer, video equipment and BNC enter the audio controller (IC1701) once and are then amplified. After this, they are either output to the eternal speaker connectedto the Audio Out connector or output to the built-in speaker.The audio controller selects the audio signal output based on the SCL/SDA (serial data/clock) signalthat is supplied from the MA board.The sound volume controller adjusts the volume in 20 steps (mute to maximum) based on a signal fromthe MA board.

Video port Monitor Out portComputer/

Audio In port

S-Video port

L-Audio-R RS-232C

Monitor OutComputer /


RS-232C port

Comportment Video port

To CN600on MA board

IC1701

Audio

Controller

CN100

CN3002

J200

CN3001 Audio in

CN102

CN200

Video

S-Video

Monitor out


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EMP-S1/S1H

2.4. RC BOARD ASSEMBLY

The RC board is equipped with elements that are used to detect (receive) infrared signals transmittedfrom the remote control. The RC receiver sensors are mounted at the front and on the rear.

Figure 2-13 RC Receiver Sensor

The output signals (serial data) received by the receiver sensors are connected to IC403 (IF-CPU) onthe MA board.

1) The MA board uses the serial data received from the remote control (button switches of the remotecontrol) to control the power ON/OFF status, a menu start, etc.

2) The serial signals supplied to the MA board are used to control the display (temporary stop, blank,

etc.).3) The serial signals supplied to the IF board via the MA board are used to control muting, adjust the

tone, and adjust the volume.

The control block is shown in Figure 2-14.

Figure 2-14 Remote Control Circuit Block Diagram

RC receiver sensor (Rear)RC receiver sensor (Front)

CN603 IC403

IC3000

Remote Control

(Front)

MA board

(Rear)

IR Receiver1

IR Receiver2

Infrared

Signal


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EMP-S1/S1H

2.5. LED INDICATOR

The MA board has three LED indicators that indicate the operating status of the projector.

Figure 2-15

The following tables show what the indicators mean and how to remedy problems the they indicate.

Power indicator

On Blink

Indicator

statusProjector status Problem and remedy

Orange Standby condition (No abnormality)

The power cable should only be disconnected when the projector is in this

state.

Press the [Power] button to start projection.

Orange Cool-down in

progress

(No abnormality)

Wait for a short while.

• The cool-down time is about 20 seconds.

This time changes depending on the outside air temperature, etc.

• During cool-down, the [Power] button of the remote control or projec-

tor is invalid if pressed.

Press it after cool-down is over and the LED has turned to orange ON.

Green Projection in

progress

(No abnormality)

Green Warm-up in

progress

(No abnormality)

Wait for a short while.

The warm-up time is 40 seconds. After warm-up, the indicator will turn

from green blink to ON.

Warning indicator

Power indicator


37/100


EMP-S1/S1H

Warning indicator

On Blink

Indicator

statusProjector status Problem and remedy

Red Internal high

temperature

(overheating)

The lamp turns off automatically and projection stops. Wait for about 5

minutes without operating the projector. After about 5 minutes have

passed, unplug the power cable and check the following:

• Make sure the air filter and ventilation outlet are clear and that the pro-

jector is not positioned against a wall.

• If the air filter is dirty, it should be cleaned.

When the power cable is plugged back in, the projector will return to its

previous state. Press the [Power] button on the projector or on the

remote control to turn it back on.

Red

(0.5 secondinterval)

Lamp problem • Disconnect the power cable from the electrical outlet. Remove the lamp

and check that it is not broken. If the lamp is not broken, re-install it.

Reconnect the power cable and press the [Power] button on the projector

or the remote control to turn it back on.

• If the lamp is broken, please contact your dealer or the nearest address

provided in the "International Warranty Conditions" in the "SafetyInstructions/World-Wide Warranty Terms" guide. (You will not be able

to use the projector until the lamp is replaced).

• Check that the lamp and lamp cover are securely installed. If the lamp or

lamp cover are not securely installed, the lamp will not switch on.

Red

(1 second inter-

val)

Internal problem Stop using the projector, disconnect the power cable from the electrical

outlet and contact your dealer or the nearest address provided in the

"International Warranty Conditions" in the "Safety Instructions/World-

Wide Warranty Terms" guide.

Orange High-speed

cooling in progress

(This is not abnormal, but, if the temperature rises too high again, projec-

tion will stop automatically.)

Set up the projector in a place which is well ventilated and ensure the air

filter and ventilation outlet are clear.

Clean the air filter.


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EMP-S1/S1H

2.6. POWER SUPPLY UNIT

The power supply unit incorporates the AC inlet, filter circuit and fuse, and consists of the power supply, power supply filter and power supply fan.

Figure 2-16

(1). Circuit block

Figure 2-17

Fuse : Overcurrent prevention. It blows when overcurrent occurs due to a

problem with power supply unit operation.EMI filter circuit : Eliminates interference from the AC power supply input.

Power supply

Power supply fan

Power supply filter

Power supply

Fuse

AC inlet

AC input

AC100-120V(AC200-240V)

Safety switch

Connected to

Ballast unit

Connecter to

MA board CN1800

connector

DC output


39/100


EMP-S1/S1H

(2). Overview of operation

• The output cable of the power supply unit is connected to the CN1800 connector on the MA board.

It allows the following voltages and signals to be transmitted.

• DC output

• Power supply Fan control signal (FANCTL).Control signal for built-in power supply cooling fan.

• Power supply ON/OFF signal (PWON)

! Caution:

• If the power cord is still connected to the projector after the power is turned off, background power

is still supplied to the MA board via the CN1800 connector.

• The EMI filter circuit/regulator circuit eliminates interference from the AC line and generates a DCvoltage for the regulators.

• Regulator circuit generate the DC voltages shown in the table below by means of switching regula-tor, so that no fluctuations in output potential occur as a result of load fluctuations.Furthermore, theindividual output voltages cannot be adjusted.

• A cooling fan is provided in order to extract the heat that is generated inside the power supply unit.The heat that is extracted by this cooling fan is dissipated outside the projector by the air exhaust fanthat is connected to connector CN704 on the MA board.

Table 2-2: EMP-S1

Nominalvoltage

Voltagerating

Rated

current

Output current

(Output power) Ripple Ripple +Spike

Protection circuitLoad

capacitor(Rated

power)MIN. MAX Overcurrent Overvoltage

100V

+3.3T +3.3V 1.5A 0.2A 1.5A 100mvpp 200mvpp Interrupt +3.4V 100µF

+5T +5V 1.0A 0.02A 1.0A 100mvpp 200mvpp Interrupt +5.2V 200µF

+18T +18V 0.25A 0.2A 0.25A 400mvpp 400mvpp Interrupt +23V 47µF

+8V +8V 0.1A 0.02A 0.1A 100mvpp 200mvpp Interrupt +11V 200µF


BALLAST 255V (155W) (0W) (165W) 25Vpp 25Vpp - +400V -

200V


+5T +5V 1.0A 0.02A 1.0A 100mvpp 200mvpp Interrupt +5.2V 200µF





Table 2-3: EMP-S1H

Nominal

voltage

Voltage

rating

Rated

current

Output current

(Output power)Ripple

Ripple +

Spike

Protection circuitLoad

capacitor(Rated

power)MIN. MAX Overcurrent Overvoltage



+18T +18V 0.25A 0.2A 0.25A 400mvpp 400mvpp - - 47µF

+8V +8V 0.1A 0.02A 0.1A 100mvpp 200mvpp Interrupt - 200µF

+12V +13V 0.5A 0.2A 0.5A 200mvpp 300mvpp - - 600µF



40/100


EMP-S1/S1H

(3). Connector/Pin layout

Figure 2-18

Pin layout for power supply connector (Connected to CN1800 on MA board)

Pin No. Signal name Pin No. Signal name Pin No. Signal name Pin No. Signal name

1 PWON 10 GND 19 +13V 28 +7V

2 +13V 11 +7V 20 GND 29 GND

3 GND 12 GND 21 +18V 30 -7V

4 +18V 13 -7V 22 FANCTL[1] 31 GND

5 GND 14 GND 23 +3.3V.T 32 +5V

6 +3.3V.T 15 +5V 24 GND 33 GND

7 GND 16 GND 25 +3.3R 34 +12V

8 +3.3R 17 +12V 26 +3.3R

9 +3.3R 18 FANCTL[0] 27 GND

CN1800

1

34

17

18


41/100


EMP-S1/S1H

2.7. BALLAST UNIT

The ballast unit re-regulates the ballast DC power supply (220-400V DC) which comes from the power supply unit in order to generate the AC power supply 132W for the UHE lamps.

Figure 2-19

Block diagram

Figure 2-20

(1). Operating principles

• Control circuit : This generates the voltages (220V-400V DC) for the control circuit inside the ballast unit.Re-regulation switching operations are carried out based on the MA board outputsignal.The output voltage is adjusted to stabilize the output power supply.

• Igniter circuit : Generates the 132W lamp voltage.

Ballast output connector

(Connects to lamp inner unit)

SCI cable

(Connects to CN1800 on MA board)

Ballast output132W

Connects to power supply unit

SCI cable :

Connects to MA board CN701 connector

DC input

220-400V

Control circuit

Igniter circuitFull bridgeDown converter

HV

LV


42/100


EMP-S1/S1H

2.8. SPEAKER

The projector has a single 1 W built-in speaker which is at the front of the projector and faces out to theupper. It can be used for monaural output of the sound which is input to the projector from a host com-

puter or video source.

Figure 2-21

Figure 2-22 shows the speaker control circuit block diagram.

Figure 2-22 Speaker control circuit block diagram

The sound which is input from the computer or video source is amplified by the control circuits (audiocontroller) on the AV board, after which it is output from the built-in speaker that is connected toCN1701.

Speaker

Audio In

IC201

SAA7115HL/V1_557

(Philips)

Audio Controller

MA board

CN3001 CN1701

Control signalVol Control

S

P


43/100


EMP-S1/S1H

2.9. TEMPERATURE CONTROL

2.9.1. Sensors and Switches

This projector is equipped with the devices shown in the table below in order to protect the safety of theoperator and maintain general safety with regard to the projector itself (by preventing abnormalities in

operation).

(1). Lamp lid detection switch

This switch is installed on the inside base of projector, and moves in conjunction with the lamp lidlatch. If it were possible to turn on the power while the lamp lid was still open, the lamp would turnon and generate high temperatures. This lid is normally opened when the operator is replacing thelamp inner unit, and so the switch is provided in order to prevent the danger of injury from burnswhich could occur if the lamp turned on accidentally.

Figure 2-23

The lamp lid detection switch is connected to CN601 of the MA board. When the lamp lid opens,IC403 (IFCPU) detects the lamp lid open signal. When the lamp lid has opened, the lamp forcedOFF signal is output from IC403 (IFCPU) to turn off the lamp.

Table 2-4:

Name Installation position/Type Function/Application

Lamp cover detection switch Inside base of projector Interrupts AC power when the lamp lid is

opened. (Power cannot be turned on.)

Safety switch Thermal switch on side face of optical

engine (lamp guide unit)

Prevents overheating around the lamp

inner unit. Interrupts AC power when the

temperature rises above a certain level.

LAMP thermistor Side face of optical engine (lamp guide

unit)

Prevents overheating around the lamp

inner unit. Turns off the lamp when the

temperature rises above a certain level.

Lamp lid


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EMP-S1/S1H

(4). Thermistor and temperature sensor operation

IC300 (PW164B) on the MA board mainly detects the temperatures (resistances) of the optical block section and power supply section at intervals of 1 second by means of the LAMP thermistor.IC300 (PW164B) carries out fan control and power supply shutdown operations based on the mea-surement results.

* Refer to 2.10 for a detailed description of fan operation.* Refer to 2.5 for a detailed description of the temperature indicator.

Table 2-5 Temperature Sensors

Condition (Warning) indicator Meaning

Normal temperature Off Normal operation in progress

Warning temperature Flashes orange If temperature rises any higher, projection stops.

Abnormal temperature Lights red Overheating (no projection)

Flashes red Problem with fans, thermistors or temperature detection circuit


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EMP-S1/S1H

2.10. FAN OPERATION

There are three fans inside the projector. These fans discharge heated air from the projector in order to prevent problems with circuit operation and component damage resulting from overheating. (It ismainly the lamp inner unit, power supply unit and ballast unit which generate heat.)

Figure 2-26 Exhaust fan

Figure 2-27 Intake fan

Figure 2-28 Power supply fan

Exhaust fan

Intake fan A

Power supply Fan


47/100


EMP-S1/S1H

(1). Fan control circuit block

Figure 2-29

(2). Operation control

• The MA board is connected to the LAMP thermistor. The driver CPU controls the operation of the

two fans (FAN 100 and FAN 80) based on the temperatures detected by the thermistors.

• The signals that are output by IC901 (driver CPU) on the MA board are used to change the output

from the fan drive circuit (regulator) on the MA board in order to control the FAN 100 and FAN

80.

• The feedback signals from the fans are used by the CPU to monitor the operation of the fans

(stopped or running) for any abnormalities. If the feedback signal indicates a condition which the

CPU does not expect, the CPU judges that there is an abnormality in the operation of the fan andimmediately turns off the lamp and causes the warning indicator to light red.

• The fan at the power supply unit operates at high speed or low speed based on the signal which is

generated by IC902 (IFCPU) on the MA board.

(3). Fan operation

(When lamp is on)

(When cool-down is in progress)

• The fans operate for approximately 20 second cool-down time after the lamp is turned off.

FAN 100 (LV FAN) : Adjusts speed according to set temperatures from the thermistor.

FAN 80 (EX FAN) : Adjusts speed according to set temperatures from the thermistor.

DACADT7518

PWPW164B

Vout-A

Vout-BSDA

SCL

SDA

LV FANLV-FAN0

LV-FANDET0

EX FAN

EX-FV0

EX-FANDET0

BGH15

PORTA0

PORTA1

BGH14

FANDET1

FANDET0

PSCI

SCL


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Chapter 3 Troubleshooting


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3-2 SE IKO EPSON Rev is i o n :C

EMP-S1/S1H

3.1. BEFORE CARRYING OUT TROUBLESHOOTING

1. If repairs involving the replacement of blocks or components have been carried out, always be sure

to re-check whether the replacement parts themselves are operating correctly or not (in order to

determine whether the problem is the result of something such as a loose connector).

2. All instructions and procedures listed in troubleshooting flowcharts should be carried out as given.

3. Follow the procedures given in Chapter 4 - Disassembly and Assembly when replacing any of the

projector components.

4. When checking the operation of the projector, always check whether the connectors are connected

securely before proceeding to other checks.

5. In order to confirm proper operation, use normal AC power and the correct cable type.

3.1.1. Troubleshooting Tools and Equipment

The following tools and equipment will be required in order to carry out troubleshooting, and so youshould check that they are on hand.

3.1.2. Field Replacement Parts

• If replacing projector parts in the course of troubleshooting, replace the whole service unit which

contains the part that needs to be replaced.

• The optical engine (comprising the light guide unit, prism unit and light valves form a single ser-

vice part and MA Board. Accordingly, the individual components should not be disassembled or be

replaced with other components (because the components have all been adjusted with respect to

each other).

• Carry out the safety tests after parts replacement is completed.

Table 3-1

Name Qty. Application/Other

Projection screen 1 Projecting images

Tape measure (3 m) 1 Measuring projection distances

Host computer 1 Transmitting audio and image data

Video equipment 1 Transmitting audio and image data

Multi meter 1 Measuring resistance values and voltages (AC/DC)

External speaker 1 Testing audio output (with audio cable connector)

Double-sided tape Short length Attaching parts

General tools 1 set Tools and equipment listed in Chapter 4 Section 4.1.


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EMP-S1/S1H

3.2. ENTRY

Check the nature of the problem using the following flow diagram, and then proceed to the correspond-ing flow chart (on the following pages).

Other

Exterior check

START

Power ON/OFF

Audio output

Control panel

• Exterior checking

Check for any external abnormalities (such as damaged cover)

• Internal cable check

Remove the upper case unit and check the cable connectors on the MA board. (Reconnect if required.)

• Power ON/OFF/Initialization

Connect the power cord and turn on the power. Check the initial operations until the "NO SIGNAL" mes-

sage appears, and then check the power off operation.1. After power is turned on, the Power indicator flashes green and projection starts.

2. After about 40 seconds, the operation indicator lights green, and projection starts at maximum brightness.

• Display input/output and image quality (use the [Source] (Enter) button to change input)

Check the quality of input and output signals from Computer/Component Video, S-Video and Video

sources. Carry out the following four steps first.

1. Check the projection position adjustment and projection distance with the foot unit.

2. Adjust the image using the focus ring.

3. Press the [Auto] button to optimize the display.

4. Also check the color adjustment made by the screen-free function.

• Audio input/output

Check that there are audio inputs from Computer/Component Video, S-Video and Video. Also check the

operation of the [AV Mute] button.

• Control panel button operations

Check the functioning of each button on the control panel.

• Remote control operation

Check the functioning of each button on the remote control.

• Other

Abnormal noise, image problem, odor, smoke

Internal cable connections

Screen display/

Image quality

Remote control operation


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EMP-S1/S1H

3.2.1. Exterior Checking

Upper Case Unit

START

Control Panel

Lower Case

Air Filter

Lamp Lid Unit

Adjustable Foot Unit

• There should be no damage, deformation or cracking due to external forces.

• The lower case should be installed correctly.• The remote signal receiver should be clean and should not have any foreign materials attached.

• Air vents should be clean.

• Upper case should be installed correctly.

• No buttons should be stuck down.

• Focus ring and zoom ring should turn smoothly.

• Lens should be clean and free from damage.


• Air vents should be clean.

• Air filter should be installed to the lower case correctly.

• Filter should be clean (remove the air filter from the lower case to check).

• Plastic frame should be free from any deformation or heat damage (discoloration) (remove the lamp

inner unit to check).

• Power supply connector should be free from discoloration.

• Glass surface of lamp should be clean.

• Can the projection height be adjusted with the foot unit?

Interface Connectors

AC Inlet

Air Filter/Lamp Inner Unit

Installation

• Connectors and terminals should not be bent or discolored.

• Connectors and terminals should be free from foreign particles.

• Connectors should not be discolored.

• Socket should be free from damage.

Lamp Inner Unit

• Lamp lid should be securely attached to lower case.

• Lamp lid detection switch latch should be free from damage. (remove the lamp lid to check).

Projection Lens Unit

IF Panel

• The remote signal receiver should be clean and should not have any foreign materials (such as tape)

attached.


• The speaker should be clean and should not have any foreign materials (such as tape) attached.


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EMP-S1/S1H

3.2.2. Internal Cable Check

Turn off the power, disconnect the power cable and then start checking.

Lamp Lid Detection Switch• MA board CN601

Ballast• MA board CN602

• Ballast unit↔ Optical engine

START

• MA board CN400 (Lock-type connector)

Intake Fan Assembly

Exhaust Fan

Upper Case Unit Removal

• MA board CN702

LAMP Thermistor

RC Board

• MA board CN701

• MA board CN704

• MA board CN603↔ RC board (Front) CN1

• MA board CN600↔ RC board (Rear) IC3000

Light Valve R/G/B• MA board CN1400 / 1500 / 1600 (Lock-type connector)

Control Panel

Speaker • MA board CN1701

Power Supply Unit• MA board CN1800

START

A

(To next page)


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EMP-S1/S1H

A

IF Board

MA board Removal

• MA board CN600

MA board Installation

(Continued from previous page)

Upper Case Unit Installation


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EMP-S1/S1H

3.2.3. Power Supply ON/OFF

Power cord connection

START

Press the [Power] button

of the operation panel.

Does the indicator

flash green?

Is the indicator lit

green?

Reconnect or replace the

operation panel.

To START

Indicator status Projector status Remedy

High-speed

cooling in

progress

• Install the projector in a place that has good

ventilation so that the air inlet and air output

are clear.

• Clean the air inlet, air output and air filter.

Lamp problem • Check the lamp lid.

• If the lamp is broken, replace it.

• If the lamp is not broken , so reinstall the lamp

and check if it turns on.

• Replace the MA board.

• Replace the optical engine.

Fan problem/

Sensor problem

(Internal

problem)

• Replace any fans that are not working.

• Replace the thermistor.


• Replace the optical engine.

High temperature

problem

• Let the projector cool down.


All extinguished. Lit normally. • LED board fault.

Flashing orange

Flashing orange

Lit orange

Flashing red

(0.5 second

intervals)

Lit orange

Flashing red

(1 second

intervals)

Lit orange

Lit red

B


orange? No

No

Yes

To START

Yes

No

Yes

No

Yes

Does the indicator

flash green?

(To next page)

Replace the MA board.

Replace the power

supply unit.


of the remote controller.


55/100


EMP-S1/S1H

Remedy for power supply problems

(1). Determine whether the problem is being caused by components inside the power supply unit, or whether it is being caused by some external factor.

(2). The basis for judging this is by checking factors such as output voltage, internal temperature,appearance of components, odors and smoke.

(3). If the cause is judged to be an internal problem, replace the power supply unit.

(4). If the newly-replaced power supply unit also has a problem and the symptoms are the same as before, then the cause of the problem is probably some external factor.

(5). If the problem is caused by an external factor, eliminate the external factor that is causing the prob-lem.

(6). If the power supply unit is recoverable but is not working properly (such as if high temperaturesare causing the thermostat to isolate the power supply, or the overcurrent protection circuit hasoperated), then there is no need to replace the power supply unit.

(7). If the power supply unit is not recoverable and is not working properly (such as if overcurrent has

blown a fuse), replace the power supply unit.(8). If there is a problem with the power supply fan, the power supply will be shut down after several minutesoperation (the indicators will switch off). In such cases, replace the power supply unit.

Is the lamp turned on?

B


Does the indicator

flash orange?


to turn off the power.

Yes

Yes

No

Yes


Replace the optical engine.

No


orange within about 20

seconds after it has

flashed orange?

Does the indicator

flash orange?



orange within about 20

seconds after it has

flashed orange?

No

Yes

No

NoReplace the optical engine.

Yes

No

To "Image display and

image quality".

Yes

(Continued from previous page)


Replace the MA board


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EMP-S1/S1H

3.2.4. Image display and image quality

! Caution:

• The image quality can also be affected by condensation and by a dirty lens. If condensation forms,the problem will correct itself naturally if the projector is left to stand for a while.

START

No

Yes

Yes

Does “NO SIGNAL”

appear in the bottom-left

of the screen?

No

No

Does an image appear

on the screen?


Replace the lamp inner

unit.





Yes

Yes

No


Does “NO SIGNAL”

appear in the bottom-left

of the screen?


No

No

Yes

1. Adjust the height using the frontadjustable foot.

2. Press the [keystone] buttons tocorrect distortion.

3. Adjust the focus.

Yes

Does the image appear

clearer?

Clean the projection lens.


clearer?


clearer?



No

Clean the areas around the

light valves.

No

No

No

Yes

Yes

Yes

Yes


clearer?


to turn on the power.

C

(To next page)


57/100


EMP-S1/S1H

C

No

Yes

Is the image quality good?

No

Connect the host

computer to the

Computer/Component

Video connectors and

display an image.


Yes

No

Press the [Auto] button.


No

Yes

Yes

Connect a source to the

following interfaces.1. Video 2. S-Video

Does an image appear?

Connect a monitor to the

Monitor Out interface.


Replace the monitor.

Replace the monitor cable.

No

Yes

Yes

Yes

Yes


D


No

1. Press the [Menu] button.

2. Select the "Video" menu.

3. Adjust the brightnessand contrast.


No



No

E

Yes

E

Documents

Epson Emp s1 s1h