HITACHI DW-3 Chassis Power Supply Operation Explanations

Materials and Design by: Alvie Rodgers C.E.T.

Note: Currently there is no detailed information related to the 42” models Power Supply, however generically they are very similar.

UNDERSTANDING THE OPERATION OF THE POWER SUPPLY USED IN THE DW-3 CHASSIS SERIES MODELS.

This document covers the DW-3 Chassis for the P42H401, P42H4011, P42T501, P50H401, P50H4011, P50S601, P50V701, P50X901, P55H401, P55H4011, P55T551 and P60X901. Even though this document is specific for the 50 and 55 inch models, it can be helpful understanding the 42 inch models as well. Please use this information to assist in the repair and service of these models.

Page 21 has some Key Points to remember about these Power Supplies.

Page 19 & 20 explains how to “Force” these power supplies to produce specific voltages. CONTENTS:

Block Diagram for the Series 1 Models ............................................................................. 00-01 Block Diagram for the Series 2 Models ............................................................................. 00-02

Explaining the Voltages needed to produce all other voltages (Points A and C) ................. 01-01 Diagram for the above explanation ..................................................................................... 01-02 Stand-By Voltage SBY 3.3V and SBY 5V generation explanation ...................................... 01-03 Diagram for Stand-By Voltage Generation Series 1 Models ............................................... 01-06 Diagram for Stand-By Voltage Generation Series 2 Models ............................................... 01-07 10V, 15V and 16V Voltage generation explanation ............................................................. 01-08 Diagram for above explanation Series 1 Models ................................................................ 01-09 Diagram for above explanation Series 2 Models ................................................................ 01-10 Explaining the Voltage Va and Vs generation ...................................................................... 01-11

• Vsago and Vcego Commands explanation .................................................. 01-11 • Va generation details .................................................................................. 01-12 • Vs generation details .................................................................................. 01-12

Diagram for Vs/Va related to above explanations All Models .............................................. 01-13 Master Power and Main Power Switch Locations .......................................................... 01-14 Connector Locations and Pin ID ..................................................................................... 01-14

CONNECTOR VOLTAGES RUN AND STAND-BY PLUS OHMAGE CHECKS:

42” Connector Voltages (Stand-By and On) and Ohms ...................................................... 01-15 50” Connector Voltages (Stand-By and On) and Ohms ...................................................... 01-16 55” Connector Voltages (Stand-By and On) and Ohms ...................................................... 01-17 60” Connector Voltages (Stand-By and On) and Ohms ...................................................... 01-18

TROUBLESHOOTING THE DW-3 POWER SUPPLY IN THE FIELD:

Forcing the Power Supply to Turn On (Not 60”) .................................................................. 01-19 Forcing the Power Supply to Turn On (60” Only) ................................................................. 01-20

KEY POINTS TO UNDERSTAND ABOUT THE DW-3 POWER SUPPLY: Key Points .......................................................................................................................... 01-21

DW-3 POWER SUPPLY UNDERSTANDING

Cover Page

(Version 07) January 29th, 2008

NOTE: The Power Supplies used can be broken down into two categories: • Series 1: 50” with H or T in the Model Number • Series 2: 50”/60” with V, S, or X and 55” with H or T in the Model Number

Materials and Design by: Alvie Rod-SERIES 1 MODELS PAGE 00-01

T501VrsVs

(80V~95V)

VraVa

(55V~70V)Va

T301

D550D551

D351D352

Q501Q500

Q301Q320

Q201Q200 D251

D261

AudioSignal

PFC

T201

RL730

Q701Regulator

IC159Regulator

5.6V

Vcc5.1V*

SBY5VStandBy

T101

Q101 D151D152

5.8VD010

R005

RL002Relay

EMIFilter

IC202Power Supply Control

AC Det

D020D021

RL001Relay

D001

Q003Q004L005

D017D018

370VVs

SurgeVcc

Vsago*

Vcego*

Power 1

Power 2

Power Off

AC ClockAC In

DW-3 CHASSIS POWER SUPPLY BLOCK DIAGRAM(50 Inch H/T Models and 60X901)

CNPPS Pin 1, 2, 3

CN64 Pin 3 CN68 Pin 1

CN63 Pin 1

CN68 Pin 4

CN64 Pin 8, 9, 10

CN64 Pin 1

CN68 Pin 5

CN68 Pin 8

CN68 Pin 7

CN63 Pin 6

CN63 Pin 7

CN63 Pin 4

CN63 Pin 5

Q414

Q412

Q418

Q421

Q400

Q416

IC160Regulator

SBY3.3V*CN68 / CN63 Pin 3

12V Audio

10.6V

16VCNPPS Pin 9

CNPPS Pin 7

CNPPS Pin 13, 14, 15

Not Used

Not Used

Vsago CN68 Pin 3Vcego CN68 Pin 2

SBY3.3V labeled Vpr2 CN68 Pin 9

Vcc5.1V CN68 Pin 10 and 11

*NOTES: 60 Inch P60X901

60" Vs (155V~180V)

PAGE 00-02

T501VrsVs

(75V~90V)

VraVa

(60V~70V)Va

T301

D550D551D552

D351D352

Q501Q500

Q301Q320

Q201Q200 D251

D261

AudioSignal

PFC

T201

RL730

Q701Regulator

IC159Regulator

5.6V

Vcc5.1V

SBY5VStandBy

T101

Q101 D151D152

5.8VD010 D011

R003R004R005

RL002Relay

EMIFilter

IC202Power Supply Control

AC Det

D020D021

RL001Relay

D001

Q003Q004L005

D017D018

370VVs

Surge

Vcc

Vsago

Vcego

Power 1

Power 2

Power Off

AC ClockAC In

DW-3 CHASSIS POWER SUPPLY BLOCK DIAGRAM50 Inch V/S/X and 42 and 55 Inch H/T Models

CNPPS Pin 1, 2, 3

CN64 Pin 3 CN68 Pin 1

CN63 Pin 1

CN68 Pin 5

CN64 Pin 8, 9, 10

CN64 Pin 1

CN68 Pin 6

CN68 Pin 8

CN68 Pin 7

CN63 Pin 6

CN63 Pin 7

CN63 Pin 4

CN63 Pin 5

Q414

Q412

Q418

Q421

Q400

Q416

15V Audio

16V

10.6VCNPPS Pin 7

CNPPS Pin 9

CNPPS Pin 13, 14, 15

IC261Regulator

-Vs(-75V~-90V)

-Vs

The 42 Inch models (P42H401 / P42T501) have an additional power supply not shown. It has the -82.7Vpower supply which is produced on the Power Supply instead of the Y-SUS PWB.The -82.7V is output from the CN64 connector pin 9.

Also note that on the 42 inch models, CN64 is only a 9 pin connector . Vs is output only on pin 7.

42" CN64 PIN 7

42" CN64 PIN 9

Materials and Design by: Alvie Rodgers C.E.T. SERIES 2 MODELS


DW-3 Power Supply Points A and C Circuit Diagram explanation: (See Figure on next page.) See DW-3 Power Supply AC Input (Test Point A and C Voltage Generation) Circuit Diagram for details POWER SUPPLY POINTS (A) and (C). Voltage present when the set is On.

Note 1: Point (C) is available anytime AC is applied to the PWB. Note 2: Point (A) is available when AC is applied to the PWB for slightly more than 2 Minutes then goes off if Quick Start is off and it is always present if Quick Start is On.

Points A and C are generic terms (not identified on the PWB itself) that are the locations for source voltages necessary for this power supply to produce all other voltages. Warning: Measurements for points A & C are taken from “Hot Ground”. See Symbol 1 on page 01-03. AC INPUT (AC Path): AC voltage is routed from the AC Cord, through the AC Filter PWB to the CN61 Connector on the Power Supply PWB. The AC is routed through the Main AC Switch. This switch acts like a vacation switch. This switch, located on the bottom right hand side, removes or allows AC to reach the Power Supply. Note: Using this switch is the same as unplugging the AC cord from the wall. Note: The 60” models do not have this switch. AC ON THE POWER SUPPLY PWB: After AC arrives at the Power Supply PWB, it is routed through the chokes L001, and L002. AC is then routed to D010 anode and then to D011. AC at the anode of D010 has two states: STATE 1, Stand-By State: During this condition, the AC is routed through three resistors R003, R004 and R005 which serve as surge protection while C101 charges. The DC voltage at D011 cathode in this state is 170V read from Hot Ground. During this state, T101 (shown on the SBY 3.3V and 5V generation circuit) produces the SBY voltage needed on the power supply for IC B+ and Relay primary voltages. STATE 2, Power-On State: During this condition, relay RL002 is energized and bypasses R003, R004 and R005. The DC voltage at D011 cathode in this state is 381V read from hot ground due to the addition of the DC voltage from D018 routed through D021 and D020. This higher voltage is needed because the power supply pro-duces a greater number of secondary voltages. Note: AC at the anode of D010 will be in State 2 for a little more than 2 minutes, then goes off, if Quick Start is off and it is always in State 2 if Quick Start is turned on in the Customer’s menu. The following explains how RL001 and RL002 are energized: (See Figure on next page.) When the power button is pressed, CN63 pin 6, Power 1 (4.8V) and CN63 pin 7, Power 2 (3.1V) are activated and supplied from the Digi-Main PWB.

Power 1 is routed to the base of Q412 turning it on, its collector goes low, which pulls pin 22 of IC202 low. Power 2 is routed to the base of Q418 turning it on, its collector goes low, which pulls pin 23 of IC202 low.

RL001 activation: IC202 outputs a high on pin 19 to the base of Q401 turning it on which drops its collector low. The collector of Q401 (RL001 relay driver) energizes the relay RL001. The anode of D009 goes low. RL001 primary voltage is Stand-By 5V. (Cathode of D009) produced by IC155, see page 01-05. RL002 activation: IC202 outputs a high on pin 18 to the base of Q402 turning it on which drops its collector low. The collector of Q402 (RL002 relay driver) energizes the relay RL002. The anode of D004 goes low. RL002 primary voltage is Stand-By 5V. (Cathode of D004) produced by IC155, see page 01-05. Remember RL002 is on for a little more than 2 minutes when AC is applied to PWB when Quick Start is off.

DW-3 POWER SUPPLY AC ROUTE AND POINTS A and C

PAGE 01-01

DW-3 POWER SUPPLY 50"/55" AC INPUT (Points A and C Voltage Generation)

3

1

CN61

2

L001 L002 R004 R005

RL002

SBY 5V

D001

HOT GROUNDTEST POINT

IC202

18

98V

Q401

Q402

D010 D011

FG1

C

L005

D016

D018

D020 (D021)

C016

To T101

C011

7

CN051*Regulation controlled by IC051 on Long Vertical Module.* for Circuit understanding only.

D004

D009

AC Neutral

AC HotGround

AC live

T101 generatesSBY +5V (CN63 pin 1) and

SBY +3.3V(CN68 pin 3, CN63 pin 3)

Always present

T101 also generates Vcc 5.1VOnly when set is on

(CN68 pin 1, CN64 pin 3)And +5.6V Generation

(CNPPS pin 1, 2, 3)When set on or Quick Start.

T201 generates+10V (CNPPS pins 7, 13, 14, 15)

and +16V (CNPPS pins 9)T201 voltages are on when the set is

on or in Quick Start.

To T201, T301, T501Measured 381VUse hot ground(Set on or Quick Start)

T301 generates Va 70V(CN64 pin 1) when set is on.

T501 generates Vs 90V(CN64 pins 8, 9, 10) when set is on.

6

CN63

22Q412

Power 1

To measure use hot ground170V when RL002 Off381V when RL002 On whenSet On or in Quick Start

Points (A) and (C) Voltage necessaryto produce all other voltages.

These are generic terms and do not appear onthe actual PWB markings.

RL001

SBY 5V

19

7 23Q418

Power 2

C101

Surge Protection RL002 offC201

D601

D602

PC601

Photocoupler for ACClock, always on.

Hot Ground SymbolOn the PWB.

"SHOCK HAZARD"

If Quick Start is not on,RL001 and RL002 will turn

on for a short time,then shut off.

BottomRightSide

of PWBA

Used for regulation.

From Digi-MainFrom

Filter PWB

R003

D017

(D021 50-X-V-S-55 H-T models only)

PA

GE

01-

02

5V B+1A +5V


DW-3 Power Supply Stand By Voltages and LV5.6V, Vcc 5.1V Circuit Diagram explanation: See the diagram for this explanation (DW-3 Power Supply SBY Voltage, LV5.6V, Vcc 5.1V Generation Circuit) shown on page 01-06 and 01-07. POWER SUPPLY VOLTAGE AT POINTS (C) MUST BE AVAILABLE WHEN AC IS APPLIED AND THE MASTER POWER SWITCH IS ON: (Measured from Hot ground, see Symbol 1 below). Points (A) and (C) are reference terms (not identified on the PWB itself). These points are the locations for source voltages necessary for this power supply to produce all other voltages. (See page 01-02 for locations). ALWAYS (STAND-BY) VOLTAGES +5.0V and +3.3V EXPLANATION: (3.3V not used in Series 2) The following voltages should be "Always Present" provided AC is applied and the Master Power switch is on.

• CN63 PIN 1: Label SBY+5.0V (Always present)

CN63 pin 1 voltage is generated within the power supply by IC159 (5V regulator). The IC input voltage is supplied from the SBY line (5.6V) produced by T101, D151 and D152. This voltage will be present when AC is applied. This voltage will be present if the CN68 connector is pulled and pin 3 is read on the Power Supply PWB.

• CN63 PIN 3: Label SBY+3.3V (Always present, Series 1 Models)

CN63 pin 3 voltage is generated within the power supply by IC160 (3.3V regulator). The IC input voltage is supplied from the SBY5V line produced by T101 and D151, D153. This voltage will be present when AC is applied. This voltage will be present if the CN68 connector is pulled and pin 3 is read on the Power Supply PWB.

• CN68 PIN 3: Label SBY+3.3V (Always present, Series 1 Models) Same as CN63 pin 3. See CN63 Pin 1 explanation above. This voltage is connected to the same line.

HOW THE ABOVE VOLTAGE IS GENERATED: The voltage used by T101 primary, which generates the signals for STAND-BY voltage development, is delivered from D011 cathode. This will be called "POINT (C)" measured from Hot Ground. (See AC Voltage Route Page 01-01 and 01-02 for Explanation and see Symbol 1 below for warning) The DC voltage measured above labeled POINT (C) is routed to T101 primary which generates the secondary waveforms use for developing Stand-By voltages.

• Regulation and drive controls for T101 are provided by IC101 (long vertical module) via the CN101 connections and drives the MOS-FET Q101 (not shown on diagram).

• The Output from the secondary of T101 is routed to D151, D153 anodes and filtered by C152, C153 and C154.

DW-3 POWER SUPPLY STAND-BY VOLTAGE GENERATION 1

PAGE 01-03

Hot Ground Symbol On the PWB

Symbol 1

Note: Look for this symbol on the PWB or on the heat sink to determine if this is a location to be used as “Hot Ground”. WARNING: This is a “SHOCK HAZARD” location.


THE FOLLOWING VOLTAGES ARE GENERATED FROM THE STAND-BY VOLTAGES DESCRIBED ON THE PREVIOUS PAGE 01-03: (See Diagram for this explanation on Page 01-06 and 07) STATES OF THE POWER SUPPLY: The Power supply can be in one of two states:

STATE 1, Normal Operation: In this state, during Stand-By (when the set is not on), the power supply only supplies Stand-By voltage SBY +5V. STATE 2, Quick Start Mode Operation: (In other chassis, stated as “Stand-By Mode”). In this state, dur-ing Stand-By (when the set is not on), the power supply not only supplies Stand-By voltage SBY +5V but it also supplies all voltages on the CNPPS connector 10V, 15V and 16V.

POWER SUPPLY TURN ON COMMANDS: (Not for turning on Vs, Va or Vcc +5.1V voltages). To turn on the power supply in normal mode or to keep the power supply running in Quick Start mode, (this doesn’t include the commands to turn on Vs and Va voltages) the Digi-Main outputs the following voltages:

1. POWER 1 on CN63 Pin 6 (Voltage reading when set is on or Quick Start: 4.8V) 2. POWER 2 on CN63 Pin 7 (Voltage reading when set is on or in Quick Start: 3.1V) 3. POWER 3 on CN63 Pin 8 is not used by this power supply (It does read 3.1V when set is on.)

Power 1 is routed to the base of Q412 turning it on which introduces a low on pin 22 of IC202. Power 2 is routed to the base of Q418 turning it on which introduces a low on pin 23 of IC202. The Outputs from IC202 are described below…. When the Remote Control power button is pressed, the IR signal is routed from the front LED PWB (PCM1 connector pin 11) to the Digi-Main PWB (PCM connector pin 38). Then the Digi-Main outputs the 2 power commands to the Power Supply PWB via the CN63 connector. When the front Power button is pressed, the PWRKEY (low) signal is routed from the front Control PWB (PCM2 connector pin 2) to the Digi-Main PWB (PCM connector pin 26). Then the Digi-Main outputs the 2 power commands to the Power Supply PWB via the CN63 connector. WHEN THE POWER 1 and POWER 2 LINES ARE HIGH THE FOLLOWING VOLTAGES ARE TURNED ON: (This does not turn on Vs, Va or Vcc+5.1V) • CNPPS PINS 1, 2 and 3: Service Manual label +5.6V

Pins 1, 2 and 3 are all tied together. This voltage is generated within the power supply. This voltage is present when the relay RL730 is energized. This relay supplies voltage from the A 5.7V line produced by T101 and D151 and D152. The relay is controlled by IC202 pin 15 which controls the relay driver Q406 and Q408. A5V supplied from the cathode of D151 and D152 is the relays switch voltage and relay driver voltage.

• CNPPS 10.7V (Pins 7, 13, 14 and 15) These lines are all tied together. (Series 1) {Explained later} • CNPPS 10.7V (Pins 13, 14 and 15) These lines are all tied together. (Series 2) {Explained later} • CNPPS 16V (Pin 9) {Explained later}

(See Page 01-06 “DW-3 Power Supply 10V, 15V and 16V Voltage Generation” for explanation.)


PAGE 01-04

Continued on next page:


• Vcc (5.1V) GENERATION: Not turned on by Power 1 or 2 commands, but by Vcego

The Vcc 5.1V is described here because its source voltage is the A +5.7V, but this voltage is not turned on until Vs and Va voltages are turned on, (when the Panel is lit). To turn on this voltage, not only must the Power 1 and Power 2 commands be present as described above, the Vcego and Vsago lines must also be present. (See Page 01-08 for details)

• CN68 PIN 1 and CN64 PIN 3: Labeled Vcc, (Series 1 Models): (See page 01-09 for diagram).

This voltage is generated within the power supply by (Transistor) Q701. This transistor (2SA1758) is turned on by its base being pulled low via IC202 pin 13. This transistor is off during stand-by and when there is a problem with the Va/Vs voltages. Its emitter is supplied by the A +5.2V produced by T101 and D151, D153. It's base is pulled low when Q711 turns on Q710 which pulls Q701 base low through R709, R710. If the CN68 connector or CN64 connector is pulled, Pin 1 on the Power Supply PWB will not produce this 5.22V.

• CN68 PIN 1 and CN64 PIN 3: Label Vcc, (Series 2 Models): (See page 01-10 for diagram).

This voltage is generated within the power supply by (FET) Q701. This solid state switch (FET) is turned on by its gate being pulled low via IC202 pin 13. This FET is off during stand-by and when there is a problem with the Va/Vs voltages. Its emitter is supplied by the A +5.7V produced by T101 and D151 and D152. Its base is pulled low when Q410 and Q702 turns on which pulls Q701 base low. If the CN68 connector or CN64 connector is pulled, Pin 1 on the Power Supply PWB will not produce this 5.1V.


PAGE 01-05

PA

GE

01-

06

SBY +5V

IC202

Q406

DW-3 POWER SUPPLY 50" (H/T Models) SBY, LV5.6V, Vcc 5.1V VOLTAGE GENERATION

See AC InputFrom D011

Cathode

T101

D151

D152

C152, 153, 154

C153

IC160In OutI O

G

*Controlledand Regulated

by Q101via CN101

Long VerticalModule

On/Off Com

IC159In OutI O

On/OffCom

Adj

D160

D159

SBY +3.3V

Q408

1

CN63

3

2

SBY +3.3V

SBY +5VTo Digi-Main

13Q711

Q710

3

CN68

4

SBY +3.3V

Gnd

Gnd

To Logic

Q7013

1 C703To

Logic PWB

Vcc 5.1V

CN64

CN68

D719

Q7209To

X-SUS PWB Vcc 5.1V Short Det.Normal On

Q701 Activewhen set On.Turned on by

Vcego.

5V B+

Active when setOn or Quick Start

Always On

Always On

RL730

D731

D730

2

1

3

CNPPS

To Digi-MainPWB

LV 5.6V

Q7408

LV 5.6VShort Det.

Normal OnD736

15

1

A +5.7V

C

Measured using hot ground170V when RL002 Off381V when RL002 On whenSet On or in Quick Start


"SHOCK HAZARD"

* Circuit understanding purposes only.

Q406/8 Active when set On.Turned on by Power 1.

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SBY +5V

IC202

Q406

DW-3 POWER SUPPLY 50"/55" SBY, LV5.6V, Vcc 5.1V VOLTAGE GENERATION

See AC InputFrom D011

Cathode

T101

D151

D152

C152

C162

*Controlledand Regulated

by Q101via CN101

Long VerticalModule

IC159In OutI O

On/OffCom

Adj

D160

D155

Q408

1

CN63

3

2

SBY +5V

To Digi-Main

13

Q702

Gnd

Q7013

1 C703To

Logic PWB

Vcc 5.1V

CN64

CN68

Q7049

ToX-SUSPWB Vcc 5.1V Short Det.

Normal On

Q701 Activewhen set On.Turned on by

Vcego.

5V B+

Active when setOn or Quick Start

Always On

RL730

D731

D730

2

1

3

CNPPS

To Digi-MainPWB

+5.6V

Q7408

LV 5.6VShort Det.

Normal On

15

1

A +5.7V

C

Measured using hot ground170V when RL002 Off381V when RL002 On whenSet On or in Quick Start


"SHOCK HAZARD"

* Circuit understanding purposes only.

Q406/8 Active when set On.Turned on by Power 1.

C153 C154

D701Q410

R701~5

D710

15V

N/C

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THE FOLLOWING VOLTAGES ARE GENERATED FROM THE VOLTAGE “POINT (A)” DESCRIBED IN THE PREVIOUS PAGES 01-01 through 01-05: POWER SUPPLY OPERATIONAL STATES:

As explained on Page 01-04, the power supply can be in one of two states: 1. Normal operation: 2. Stand-By mode operation: (Sometimes referred to as “Quick Start”).

LOW VOLTAGE POWER SUPPLY TURN ON COMMANDS: (Not for Vs and Va Voltages). To turn on the power supply in normal mode and to keep the power supply running in Stand-By mode, (this doesn’t include the commands to turn on Vs and Va voltages) the Digi-Main outputs the following voltages:

1. POWER 1 on CN63 (4.8V) 2. POWER 2 on CN63 (3.1V)

WHEN THE POWER 1 and POWER 2 LINES ARE HIGH THE FOLLOWING VOLTAGES ARE TURNED ON: (See Diagrams on next two pages).

• CNPPS PIN 7, Label 10V: (The 10V actually reads 10.7V), tied to pins 13, 14 and 15, (Series 1 Models) : This voltage is generated by T201 and rectified by D251, filtered by C252, C253 and C254 and output pin 7.

• CNPPS PIN 7, Label 10V: (The 10V actually reads 10.7V), (Series 2 Models) : This voltage is generated by T201 and rectified by D261, filtered by C262 and regulated by IC261 (10V Regulator).

• CNPPS PINS 13, 14 and 15 Label 12V, (Series 1 Models): Pins 13, 14 and 15 are all tied together with pin 7 described above.

• CNPPS PINS 13, 14 and 15 Label 12V, (Series 2 Models): Pins 13, 14 and 15 are all tied together. This voltage is generated within the power supply. This voltage is generated by T201 and rectified by D251, filtered by C252, C253 and C254. It is output after passing through D252 and D253 which drops the 16V voltage by 1.2V.

• CNPPS PIN 9: Label +16V, (Series 1 Models): This voltage is generated by T201 and rectified by D251, filtered by C252, C253 and C254. It is output before passing through D252 and D253 which drops the voltage by 1.2V.

• CNPPS PIN 9, Label 16V, (Series 2 Models) : This voltage is generated by T201 and rectified by D261, filtered by C262, C263 and output on pin 9.

(The following is just for circuit understanding and is not shown on the diagram) 10V REGULATION: (Series 1 Models) T201 regulation for the 10V is controlled by Q220. This FET is controlled by IC-101 (the long vertical module) via the CN221 connector. 10V REGULATION: (Series 2 Models) 10V is controlled by IC261. The input voltage to this IC is controlled as described in the 15V / 16V regulation below. 15V and 16V REGULATION: Class 1 Models T201 regulation for the 16V is controlled by Q221. This FET is controlled by IC-101 (the long vertical module) via the CN201 connector. Both of the above voltage are regulated by monitoring the 10.7V line by photo coupler PC201. This power supply is activated when the photo coupler PC202 is turned on by IC202. This IC202 outputs a high from pin 16 to turn on Q405 which activated PC202.

DW-3 POWER SUPPLY CNPPS VOLTAGES GENERATION 1

PAGE 01-08

See Page 15, 16, 17 and 18 for Pin locations which vary by model

CNPPS Circuits vary by Model, (Series 1 or Series 2)

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DW-3 POWER SUPPLY (50"/55" (V/Z/X) 60" (X) Models) CNPPS +10V, +15V and +16V VOLTAGE GENERATION

From D017Cathode

T201

C252

*Controlled byQ221

via CN201Long Vertical

Module

15V

D251

13

CNPPS

To DIGI-MAIN PWB

9

8

10

See AC INPUTPoint A and C VoltageGeneration Diagram

*Note: PC202 (Photo Coupler) turns on Va Power Supply.Driven by IC202 pin 16 through Q405 when VceGo CN68 pin 7 andVsaGo CN68 pin 8 lines go high.

C201

*Controlled byQ220


Module

C253 C254

D261

C262

+15V

14

+15V15

+16V16V

11

12

Gnd

Gnd

Gnd

Gnd

*FeedbackRegulation Voltageprovided by PC201

+15VMeasured 381VUse hot ground

(Set On or Quick Start)

A


"SHOCK HAZARD"

* = Indicates circuit understanding information only.

7 +10V

D252 D253

C264

IC261In OutI O

On/OffCom

Adj

D264

C263

10V

All Voltages are On when the Set is ON or Quick Start is On

Diagramlabel 12V

Some Diagramlabel 10.5V

1

2

3

See SBY Diagramfor circuit details

5.6V

5.6V

5.6V

PA

GE

01-

10

D W -3 PO W ER SU PPLY 50" (H /T M odels) C N PPS +10V and +16V VO LTA G E G EN ER A TIO N

From D 017Cathode

T201

C252

*C ontro lled byQ 221

via C N 201Long Vertica l

M odule

10.7V

D 251

7

C NPPS

To D IG I-M A IN PW B

9

8

10

See AC IN PU TPoint A and C VoltageG eneration D iagram

*N ote: PC 202 (Photo C oupler) turns on Va Pow er Supply.D riven by IC 202 p in 16 through Q 405 w hen VceG o C N 68 p in 7 andVsaG o C N 68 p in 8 lines go h igh.

C201

*C ontro lled byQ 220

via C N 221Long Vertica l

M odule

C253 C 254

D261

C262

+10V

13

+12V14

15

+16V16V

11

12

G nd

G nd

G nd

G nd

These voltages O n w henthe Set is O N or w hen

Q uick S tart is O n.

*FeedbackR egula tion Voltageprovided by PC 201

+12V

+12V

Even though thesepins are labeled w ith

different vo ltages,they are the sam e.

M easured 381VU se hot ground

(Set O n or Q uick S tart)

A

H ot G round Sym bolO n the PW B.

"SHO C K HAZARD "

* = Indicates c ircu it understanding in form ation on ly.

C263

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PURPOSE: Checking for voltages necessary to produce: Va and Vs . Only present during Power On. DETAILED EXPLANATION: How Vs and Va voltages are generated. First it is necessary to confirm that Stand-By +5V is present, (CN63 pin 1).

• See Page 01-03 to check the voltages that produce STAND-BY +5V. Next the Power 1 (CN63 pin 6) and Power 2 (CN63 pin 7) lines must be high.

• See Page 01-04 to check Power 1 and 2 lines and the voltage that are turned on when these go high. When the Remote Control power button is pressed, the IR signal is routed from the front LED PWB (PLS connector pin 1) to the Digi-Main PWB (PSL connector pin 1). Then the Digi-Main outputs the Power 1 and Power 2 commands to the Power Supply PWB via the CN63 connector. When the front Power button is pressed, the PWRKEY (low) signal is routed from the front Control PWB (PCST connector pin 11) to the Digi-Main PWB (PSC connector pin 1). Then the Digi-Main outputs the Power 1 and Power 2 commands to the Power Supply PWB via the CN63 connector. Once the Stand-By 5V and Power 1 and 2 are confirmed, next it is necessary to confirm the signals that turn on the Va and Vs Power Supplies and Vcc (5.1V) that drive the X-SUS, Y-SUS and A-BUS PWBs. These turn-on command voltages are delivered from the Logic PWB CN6 via the CN68 connector.

a) Vcego CN68 b) Vsago CN68

Vcego: The following components are not shown on the diagram, this is just for explanation:

• IC202 will receives Vcego via pin 7 of the CN68 connector. This high is routed to Q414 base and turns it on. Its collector goes low and drops pin 26 of IC202 low. This turns on the following power supplies that drive the CN68 and CNPPS connector voltages.

• IC202 turns on Q410 and Q702 via pin 13 which turns on Q701 which delivers the 5.6V out the CN64 connector pin 3 (+5.6V) to the X-SUS PWB.

Vsago: Some of the following components are not shown on the diagram, this is just for explanation:

• IC202 will receives Vsago via pin 8 of the CN68 connector. This high is routed to Q416 base and turns it on. Its collector goes low and drops pin 29 of IC202 low. This turns on the following power supplies. • Va

◊ CN64 pin 1 (42”, 50” and 55”) ◊ CN64 Pins 1 and 2 (60”)

• Vs ◊ CN64 pins 8, 9 and 10 (50” and 55”) ◊ CN64 pins 9 and 10 (60”) ◊ CN64 pin 7 (42”)

DW-3 POWER SUPPLY Vs/Va Voltage Generation 1

PAGE 01-11

See Page 15, 16, 17 and 18 for Pin locations. Pins vary by Model.

Vs/Va vary by Model size


Va VOLTAGE GENERATION EXPLANATION: (See diagram on Next Page for details). The Va voltage is not adjustable on the 42 inch models. This voltage is specifically matched to the panel which has a printed label indicating what this voltage should be. (Va is adjustable on the 50 / 55 inch models via Va1 Course and Va1 Fine controls). The raw B+ of 381V is delivered to T301 primary via (POINT A). T301 switching begins when the photo coupler PC302 is turned on by IC202. This transformer is regulated by IC101 mounted on the large vertical module. IC101 which receives and delivers its regulation control signals via the CN301 connector. The output from T301 is rectified by D351 and D352, filtered by C352 and C354. This voltage is supplied to the X-SUS PWB and then routed to the Y-SUS and A-BUS PWBs. NOTE: The CN64 connector can not be unplugged to test this voltages. The following components are not shown on the diagram, this is just for explanation: Over Voltage Detection: The Va voltage is monitored by the zener D430. Va is routed through the voltage divider R439, R440 and R441, through D434 to the cathode of D430. If Va goes too high, D430 fires, it pulls the base of Q430 up, turning it on, which pulls pin 25 of IC202 low. IC202 will then shut off the power supply. See note below about shutdown: Vs VOLTAGE GENERATION EXPLANATION: (See diagram on next page for details). The Vs voltage is adjustable. This voltage is specifically matched to the panel which has a printed label indicating what this voltage should be. Adjust using the VS1 is a coarse adjustment and VS2 is a fine adjustment for Vs. The raw B+ of 381V is delivered to T501 primary via (POINT A). T501 switching begins when the photo coupler PC502 is turned on by IC202. This transformer is regulated by IC101 mounted on the large vertical module. IC101 which receives and delivers its signals via the CN521 connector. The output from T501 is rectified by D550, D551 and D552 filtered by C552 and C553. This voltage is supplied to the X-SUS PWB via the CN64 connector. Pins vary by model size. NOTE: The CN64 connector can not be unplugged to test this voltages. The following components are not shown on the diagram, this is just for explanation: Over Voltage Detection: The Vs voltage is monitored by the zener D430. Va is routed through the voltage divider R433, R434, R435 and R436, through D433 to the cathode of D430. If Vs goes too high, D430 fires, it pulls the base of Q430 up, turning it on, which pulls pin 25 of IC202 low. IC202 will then shut off the power supply. NOTE: Remember when there is a shutdown event, a quick check to see if this has happened is that the CN64 Vs/Va voltages will not come up. If this happens, it must be reset before another attempt is made to turn the set on. To reset, turn the power off, unplug the CN68 connector for 5 seconds. Then reseat the connector. (Not Shown in the diagram on the next page, but located on some Power Supply PWBs) is a Voltage control IC IC552 that can manipulate the Vs voltage just as the Vs adjustment pot VS1 and IC352 that can manipulate the Va voltage just as the Va adjustment pot Va1. The voltage control input for these ICs is delivered from the Logic PWB via the CN68 connector labeled Vrs and Vra. No information is available for exactly why the Logic PWB manipulates this control voltage.

DW-3 POWER SUPPLY Vs/Va Voltage Generation 2

PAGE 01-12

PA

GE

01-

13

Note2: Related to the 42" (H/T) ModelsPin 7 is the only Vs output.Pin 9 is -Vs (negative 83V).Pin 10 is not used.

D352

DW-3 POWER SUPPLY Va/ Vs VOLTAGE GENERATION ALL MODELS

From D017Cathode

T301

C352

Controlled byQ301


Module

Va (Voltage varies by model size)

D351

1

Va / Vs Test Pointson Power Supply PWB

CN64

To X-SUS PWB

1

CN99

3

2

C354

Va (70V)

Vs (90V)

T501

C552

Va (Voltage varies by model size)D551

See AC INPUT (Point A and C)Voltage Generation Diagram

Note: PC302 (Photo Coupler) turns on Va Power Supply.Driven by IC202 pin 25 through Q419 whenVceGo CN68 pin 7 and VsaGo CN68 pin 8 lines go high.

Controlled by Q501v ia CN521

Long VerticalModule

Note: PC502 (Photo Coupler) turnson Vs Power Supply.Driven by IC202 pin 14 throughQ407 whenVceGo CN68 pin 7 and VsaGoCN68 pin 8 lines go high.

Measured 381VUse hot ground

(Set On or Quick Start)

A

6

8

9

10

Hot Ground SymbolOn the PW B.

"SHOCK HAZARD"

D550

D552

C553

Note: D550 note used in the 50" (H/T) Models

Note: C553 note used in the 50" (H/T) Models

Note: The 42" (H/T) Models have a -Vs output on Pin 9 of CN64 circuit not shown

Note1

Note1: Related to the 60" (X) ModelPin 2 is used for Vs.Pin 9 is not used.

2Note1

Note2

Note2

7Note2

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DW-3 MASTER POWER and MAIN POWER SWITCH LOCATIONS

PAGE 01-14 Materials and Design by: Alvie Rodgers C.E.T.

6 1

CN61 AC In (All models but the 42”)

CN64

CN99

CNPPS

CN63 CN68

1 8 1 9

1

15

1

3

10

1

Test Point CN99 Va pin 1 Vs pin 2

Gnd pin 3

DW-3 POWER SUPPLY CONNECTOR IDENTIFICATION

CN61 AC In 42” Models CN68 in the

60” has 11 pins

CN64 in the 42” has only

9 pins

MASTER POWER SWITCH

The Main Power Button is located on the bottom “back side” under the mark “(|)”. Shown by finger.

Note: The P60X901 does not have this Main

(Master) Power Switch.

AC must be removed via the wall socket.

TV POWER SWITCH

DW-3 CONNECTORS (42” Pin Configuration)

CN64 to X-SUS CN23

Pin Label SBY RUN Ohm Out/In

1 Va 0V 65.2V 13.6K↑ —>

2 N.C. n/a n/a n/a n/a

3 Vcc 0V 5.1V 0.7K↑↑ —>

4 GND n/a n/a n/a n/a



7 +Vs 0V 85V 0.8M↑ —>


9 -Vs 0V -85.5V 0.8M↑ —>

CN68 to LOGIC CN6


1 Vcc 0V 5.1V 0.7K↑↑ —>


3 N.C. 0V 0V 2.6K↑↑ n/a


5 Vra 0.6V 1.5V 5.5K <—

6 Vrs 0.6V 1.5V 5.5K <—

7 Vcego 0V 3.2V 6.3K <—

8 Vsago 0V 3.2V 6.3K <—

9 N.C. n/a n/a 15.3K n/a

CN63 to Digi-Main PPM1


1 STBY+5.0V 5.2V 5.2V 1.9K↑ —>


3 N.C. 0V 0V 2.6K↑↑ n/a

4 *PoWERoFF 0V 0V 2.8K —>

5 ACCLoCK 3.3V 3.8V 11.1K —>

6 PoWER1 0V 4.8V 9.6K↑ <—

7 PoWER2 0V 3.1V 10.5K <—

8 N.C. n/a 3.3V 9.1K n/a

CNPPS to Digi-Main PPM2


1 +5.6V 0V 5.6V 1.3K↑ —>

2 +5.6V 0V 5.6V 1.3K↑ —>

3 +5.6V 0V 5.6V 1.3K↑ —>




7 +10V 0V 10.5V 2.7K↑ —>


9 +16V 0V 16V 12.3K↑ —>




13 +12V 0V 10.5V 3.2K↑ —>

14 +12V 0V 10.5V 3.2K↑ —>

15 +12V 0V 10.5V 3.2K↑ —>

*CN63: Pin 4 at power off, momentary 3V pulse

Symbols in the Ohm Column: ∞ Infinity/open, ↑ After charging/discharging, ↑↑ After charging/discharging slowly

*Pins 13, 14 and 15 are all tied together

*Pin 3 CN63 Pin 1 CN68 are all tied together

See page 14 for connector locations on the Power Supply PWB PAGE 01-15

DW-3 50” Power Supply Connector Voltages


1 Va 0V 65.7V 13.6K↑ —>

2 N.C. n/a n/a ∞ n/a

3 Vcc 0V 5.1V 0.7K↑↑ —>





8 Vs 0V 88V 0.8M↑ —>

9 Vs 0V 88V 0.8M↑ —>

CN64 to X-SUS CN23


10 Vs 0V 88V 0.8M↑ —>

CN68 to LOGIC CN6


1 Vcc 0V 5.1V 0.7K↑↑ —>


3* Vpr2 3.3V 3.3V 2.6K↑↑ —>


5* N.C. n/a n/a 5.5K n/a

6* N.C. n/a n/a 5.5K n/a

7 Vcego 0V 2.7V 6.3K <—

8 Vsago 0V 2.7V 6.3K <—

9* PFCgo n/a n/a 15.3K n/a



1 STBY+5.0V 5.2V 5.2V 1.9K↑ —>


3* STBY+3.3V 3.3V 3.3V 2.6K↑↑ —>


5 ACCLoCK 3.3V 3.8V 11.1K —>

6 PoWER1 0V 4.8V 9.6K↑ <—

7 PoWER2 0V 3.1V 10.5K <—

8 N.C. n/a 3.3V 9.1K n/a



1 +5.6V 0V 5.6V 1.3K↑ —>

2 +5.6V 0V 5.6V 1.3K↑ —>

3 +5.6V 0V 5.6V 1.3K↑ —>




7* +10V 0V 10V 2.7K↑ —>


9 +16V 0V 16V 12.3K↑ —>




13* +12V 0V 10.6V 3.2K↑ —>

14* +12V 0V 10.6V 3.2K↑ —>

15* +12V 0V 10.6V 3.2K↑ —>

*For 50” V/S/X Models CN63: Pin 3 is labeled N.C.

*For 50” V/S/X Models CN68: Pin 3 is labeled N.C., Pin 5 is labeled Vra Pin 6 is labeled Vrs, Pin 9 is labeled N.C.

*For 50” V/S/X Models CNPPS: Pin 7 is labeled 10.5V and Pin 13, 14 and 15 are labeled 15V



DW-3 55” Power Supply Connector Voltages (Under development)


CN68 to LOGIC CN6


1 Vcc 0V 5.1V 0.7K↑↑ —>


3 N.C. 3.3V 3.3V 2.6K↑↑ n/a


5 Vra n/a 1.7V 5.5K <—

6 Vrs n/a 2.2V 5.5K <—

7 Vcego 0V 2.7V 6.3K <—

8 Vsago 0V 2.7V 6.3K <—

9 N.C. n/a n/a 15.3K n/a



1 STBY+5.0V 5.2V 5.2V 1.9K↑ —>


3 N.C. 3.3V 3.3V 2.6K↑↑ n/a


5 ACCLoCK 3.3V 3.8V 11.1K —>

6 PoWER1 0V 4.8V 9.6K↑ <—

7 PoWER2 0V 3.1V 10.5K <—

8 N.C. n/a 3.3V 9.1K n/a



1 +5.6V 0V 5.6V 1.3K↑ —>

2 +5.6V 0V 5.6V 1.3K↑ —>

3 +5.6V 0V 5.6V 1.3K↑ —>




7 +10.5V 0V 10V 2.7K↑ —>


9 +16V 0V 16V 12.3K↑ —>




13 +15V 0V 10.6V 3.2K↑ —>

14 +15V 0V 10.6V 3.2K↑ —>

15 +15V 0V 10.6V 3.2K↑ —>

1 Va 0V 65.1V 13.6K↑ —>

2 N.C. n/a n/a ∞ n/a

3 Vcc 0V 5.1V 0.7K↑↑ —>





8 Vs 0V 88.1V 0.8M↑ —>

9 Vs 0V 88.1V 0.8M↑ —>

CN64 to X-SUS CN23


10 Vs 0V 88.1V 0.8M↑ —> *CN63: Pin 4 at power off, momentary 3V pulse



*Pin 3 CN63 Pin 1 CN68 are all tied together

DW-3 60” Power Supply Connector Voltages (Under development)


1 Va 0V 68V 13.6K↑ —>

2 Va 0V 68V 13.6K↑ —>

3 Vcc 0V 5.1V 0.7K↑↑ —>

4 Vcc 0V 5.1V 0.7K↑↑ —>




8 N.C. n/a n/a 0.8M↑ n/a

9 Vs 0V 174V 0.8M↑ —>

CN64 to X-SUS CN23


10 Vs 0V 174V 0.8M↑ —>

CN68 to LOGIC CN9



2 Vcego 0V 2.7V 6.3K <—

3 Vsago 0V 2.7V 6.3K <—

4 Vra 0V 2.2V n/a <—

5 Vrs 0V 1.6V n/a <—




9 Vpr2 3.3V 3.3V 2.6K↑↑ —>

10 Vcc 0V 5.1V 0.7K↑↑ —>

11 Vcc 0V 5.1V 0.7K↑↑ —>



1 STBY+5.0V 5.2V 5.2V 1.9K↑ —>


3 STBY+3.3V 3.3V 3.3V 2.6K↑↑ —>


5 ACCLoCK 3.3V 3.8V 11.1K —>

6 PoWER1 0V 4.8V 9.6K↑ <—

7 PoWER2 0V 3.1V 10.5K <—

8 N.C. n/a 3.3V 9.1K n/a



1 +5.6V 0V 5.6V 1.3K↑ —>

2 +5.6V 0V 5.6V 1.3K↑ —>

3 +5.6V 0V 5.6V 1.3K↑ —>




7 +10V 0V 10V 2.7K↑ —>


9 +16V 0V 16V 12.3K↑ —>




13 +12V 0V 10.6V 3.2K↑ —>

14 +12V 0V 10.6V 3.2K↑ —>

15 +12V 0V 10.6V 3.2K↑ —>




*Pin 3 & 4 CN63 Pin 10 & 11 CN68 are all tied together

DW-3 POWER SUPPLY FORCING VOLTAGE GENERATION

PURPOSE: Forcing the Power Supply on to generate voltages.… (See Next page for 60” procedure) Models Covered: All DW-3 Chassis Plasma Television: (Series 1) P42H401, P42H4011, P42T501, P50H401, P50H4011, P50T501, (Series 2) P50S601, P50V701, P50X901, P55H401, P55H4011, P55T551 BRIEF EXPLANATION: The below procedure will assist the Service Technician in determining if the power supply is in working order. The 1st test will confirm the following: All power supplies that generate voltage on the CNPPS connector. This includes the 5.6V, 10V, 12V and 16V. The 2nd test below will check for Vs and Va voltages generation REQUIREMENTS: The power supply must already be producing: STB +5V (CN63 pin 1 all series models) STB +3.3V (CN63 pin 3 Series 1 models)

• (See Explanation of how Stand-By Voltages are generated in Pages 01-01 through 01-05) FIRST TEST LOW VOLTAGE CHECKS: TEST PROCEDURE: (See page 18 for switch location and connector locations)

1. Remove AC by turning off vacation switch (Master Power). 2. Unplug CN68, CN64 and CN63 3. Use a jumper wire, short from CN63

• Pin 3 to pins 6 and 7. (Shorts SBY 5V to the Power 1 and 2). 4. Apply AC power by turning on the Master Power Switch. 5. Check all voltages on CNPPS connector. Use chassis ground.

• 5.6V pins 1, 2 and 3 • 10.7V pin 7, 13, 14 and 15 • 16V pin 9

SECOND TEST Va/Vs VOLTAGE CHECKS: Use the CN99 connector to test Va/Va voltages.

6. Remove AC by turning off vacation switch (Master Power). 7. Leave the jumper connected as stated in Step 3 above. 8. Use a jumper wire, short from CN68 pins 7 and 8 to pin 1 of CN63. (This shorts SBY 5V to the Vcego

and Vsago lines). NOTE: Do the Va/Vs checks below quickly by turning on the AC, making a check and then turning off the AC to avoid the Power Supply from shutting down. When Vs reaches 101V shutdown occurs. To recover the power supply, remove AC, remove all jumpers, reinsert all connectors, return to first test.

9. Va CHECK: (Use the CN99 pin 1. Ground in CN99 Pin 3) • Apply AC power by turning on the Master Power Switch. • Check the Va voltage. Note this voltage will be Approx. 74V. • Remove AC by turning off the Master Power Switch.

10. Vs CHECK: (Use the CN99 pin 2. Ground in CN99 Pin 3)

• Apply AC power by turning on the Master Power Switch. • Check the Vs voltage. Note this voltage will be Approx. 74V then begin to rise.

Note, if Vs reaches 101V, the power supply will shut down, see Note above about how to recover. • Remove AC by turning off the Master Power Switch.

If the above checks are OK, then the power supply is working.....


DW-3 POWER SUPPLY FORCING VOLTAGE GENERATION

PURPOSE: Forcing the Power Supply on to generate voltages.... THIS COVERS ONLY THE 60” DW-3 Chassis Plasma Television: P60X901. BRIEF EXPLANATION: The below procedure will assist the Service Technician in determining if the power supply is in working order. The 1st test will confirm the following: All power supplies that generate voltage on the CNPPS connector. This includes the 5.6V, 10V, 12V and 16V. The 2nd test below will check for Vs and Va voltages generation REQUIREMENTS: The power supply must already be producing: STB +5V (CN63 pin 1) STB +3.3V (CN63 pin 3)

• (See Explanation of how Stand-By Voltages are generated in Pages 01-01 through 01-05) FIRST TEST LOW VOLTAGE CHECKS: TEST PROCEDURE: (See next page for switch location and connector locations)

1. Remove AC by turning off vacation switch (Master Power). 2. Unplug CN68, CN64 and CN63 3. Use a jumper wire, short from CN63 pin 3 to pins 6 and 7. (Shorts SBY 3.3V to the Power 1 and 2). 4. Apply AC power by turning on the Master Power Switch. 5. Check all voltages on CNPPS connector. Use chassis ground.

• 5.6V pins 1, 2 and 3 • 10.7V pin 7, 13, 14 and 15 • 16V pin 9

SECOND TEST Va/Vs VOLTAGE CHECKS: Use the CN99 connector to test Va/Va voltages.

6. Remove AC by removing the AC Plug 7. Leave the jumper connected as stated in Step 3 above. 8. Use a jumper wire, short from CN68 pin 9 to pins 2 and 3. (This shorts SBY 3.3V to the Vcego and

Vsago lines). NOTE: Do the Va/Vs checks below quickly by turning on the AC, making a check and then turning off the AC to avoid the Power Supply from shutting down. When Vs reaches 101V shutdown occurs. To recover the power supply, remove AC, remove all jumpers, reinsert all connectors, return to first test.

9. Va CHECK: (Use the CN99 pin 1. Ground in CN99 Pin 3) • Apply AC power by inserting the AC Plug • Check the Va voltage. Note this voltage will be Approx. 100V. • Remove AC by removing the AC Plug

10. Vs CHECK: (Use the CN99 pin 2. Ground in CN99 Pin 3)

• Apply AC power by inserting the AC Plug • Check the Vs voltage. Note this voltage will be Approx. 100V then begin to rise.

Note, if Vs reaches 120V, the power supply will shut down, see Note above about how to recover. • Remove AC by removing the AC Plug

If the above checks are OK, then the power supply is working.....


DW-3 POWER SUPPLY KEY POINTS

The following are Key Points related to the DW-3 Power Supply; 1. Generates Stand-By 5V any time AC is applied to the Power Supply PWB, No matter if set on or off.

2. The Digi-Main PWB generates Power 1 and Power 2 commands on the CN63 connector when the set is in

"Quick Start" (Instant On) even when the set is off (See 3 below) and when the set is turned on.

3. Generates All voltage on the CNPPS connector when the set is in "Quick Start" (Instant On) because of Power 1 and Power 2 are high.

For the following reasons; • The TV turns on quickly • Data communications do not have to be re-initiated at turn on • The Sub-Digital PWB digital Tuner can be on

4. Power 1 and Power 2 CN63 connector DOES NOT turn on Vs and Va or Vcc +5.1V voltages, it only turns on CNPPS voltages.

5. Power 1 and Power 2 CN63 connector comes from the Digi-Main PWB PPM1 connector.

6. Vsago and Vcego CN68 connector DOES turn on Vs, Va and Vcc +5.1V voltages. (Also –Vs 42”)

7. Vsago and Vcego CN68 connector comes from the Logic PWB CN6 connector.

8. The CN68 connector must be unplugged and then reinserted to reset the Power Supply if Vs/Va did not come up for some reason. If this is not done, Vsago or Vcego will never attempt to turn on Vs/Va again. (If AC is remove, this will reset the Power Supply, but it takes over 5 minutes).

9. The Power Supply can be forced On (2 procedures) to test all power supplies. • First: One Procedure to test all voltage but Vs, Va and Vcc +5.1V. (Also –Vs 42”) • Second: One Procedure to test Vs, Va and Vcc +5.1V voltages. (This procedure requires the First

process to be active.) (Also –Vs 42”)

10. Vcc(5.1V) CN64 pin 3 and CN68 pin 1 is generated on the Power Supply and is an output voltage from the Power Supply, not an input.

11. (Series 1 Models) CNPPS Pins 7, 13, 14, 15 are all tied together (speaking of solder path), they are the same Voltage. (Series 2 Models) CNPPS Pins 13, 14, 15 are all tied together (speaking of solder path), they are the same Voltage.

12. Vcc (5.1V), CN63 Pin 3 and CN68 Pin 9 are tied together (speaking of solder path). (Series 1 Models)

13. Power 3 is not used, (CN63 connector).

14. Vra / Vrs CN68 connector is used, but there is no technical explanation Series 2 Models. (Not used in Series 1 Models)

15. The Relays RL001 and RL002 turn on any time AC is applied to the Power Supply PWB with the following conditions.

• If “Quick Start” is off, both relays turn off after a little more than 2 minutes when AC first applied. • If “Quick Start’ is on, both relays stay on. • When the set is turned on, both relays turn on.


Documents

HITACHI DW-3 Chassis Power Supply Operation Explanations