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Applies to models:
Cover Page2011 – Premium 3D Plasma TV
Technical Guide and Troubleshooting Flowchart
2011- Plasma FHD TV – (14th Generation)
TC-PXXGT30TC-PXXVT30
Panasonic National TrainingPanasonic Service and Technology Company
TTG110901CP
Prepared byCesar Perdomo
Panasonic Service and Technology CompanyNational Training
Warning This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
Copyright ©
2009 by Panasonic Service and Technology CompanyAll rights reserved. Unauthorized copying and distribution is a violation of law.
"HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.“
Table Of Contents Content Page
2011 Series Line Up And Available Sizes 4 Features 5 2011 Premium 3D PDP Line up And Feature Comparison 6 New Technical Features 7 Charging the 3D Glasses 8 Connection (Mini Adapters) 9 Boards Layout 10 Connections (Mini Adapters Part Number) 11 Service port (M3 mini Jack) Specifications 12 2011 PDP Extension Cable list (GT30 series) 13 2011 PDP Extension Cable for A board (GT30 series) 14 2011 PDP Extension Cable for P board (GT30 series) 15 2011 PDP Extension Cable list (VT30 series / FHD) 16 SOS Detect Circuit 17 SOS Detect Circuit Schematic (TC-P50G30) 18 SOS Detect Circuit Schematic (TC-P55VT30) 19 Voltage Distribution 20 Power Supply Voltage Distribution (TC-P50GT30) 21 Power Supply Voltage Distribution (TC-P55VT30) 22 Signal Processing 23 GT30 Models Video Signal Flow 24 VT30 Models Video Signal Flow 25 Signal Processing Circuit (GT Series) 26 Signal Processing Circuit (VT Series) 27 Boards Layout 28 PCB Part List 29 SOS Detect Circuit (Shutdown) 30 Cautions 31 Power LED Error Code Definition (1 of 2) 32 Power LED Error Code Definition (2 of 2) 33 Boards Layout 34 SOS Blinking Codes/Troubleshooting Flowchart 35 Troubleshooting Solid Red LED Shutdown Failure 36 Behavior Comparison Between 2009/2010 and 2011 Models When Shorted Vsus, Vda, or P15V
37
Solid Red LED Error Code (Locked Mode) 38 Troubleshooting Solid Red LED Failure (Locked Mode) 39 Troubleshooting 1 Blink Failure 40 Troubleshooting 4 Blinks Failure 41 4 Blinks Error Code (Abnormality of Power Supply Output ) 42 Troubleshooting 4 Blinks Failure 43 Troubleshooting 6 Blinks Failure 44
Content Page
6 Blinks Error Code Circuit Explanation 45 6 Blinks Error Code (SC Energy Recovery Circuit Abnormality)
46
Troubleshooting 6 Blinks Failure 47 Troubleshooting 7 Blinks Failure 48 7 Blinks Error Detect Circuit 49 Quick Procedure To Check For Short or Low Resistance Condition of the Vsus, Vda, and P15V Lines
50
Troubleshooting 7 Blinks Failures (GT and VT Series) 51 Detailed Troubleshooting Procedure for Shorted Vda 52 VFO/VSCN_F and VF_5V Resistance Test (46”, 50”, and 55” FHD (S30 and ST30))
53
VFO/VSCN_F and VF_5V Resistance Test (50”~65” Slim Models (GT30 and VT30))
54
55 SU-SD boards Isolation Procedure 56 Troubleshooting 8 Blinks Failure 57 8 Blinks Error Code 58 8 Blinks Error Detect Circuit 59 8 Blinks Error Detect Circuit 60 Troubleshooting 8 Blinks Failure 61 Troubleshooting 9 Blinks Failure 62 9 Blinks Error Code 63 Troubleshooting 9 Blinks Failure 64 Troubleshooting 10 Blinks Failure 65 Troubleshooting 10 Blinks Failure 66 Troubleshooting 10 Blinks Failure 67 Troubleshooting 11 Blinks Failure 68 11 Blinks Error Detect Circuit (Fan SOS) 69 11 Blinks Error Code Explanation 70 Troubleshooting 11 Blinks Failure 71 12 Blinks Error Code 72 Troubleshooting 12 Blinks Failure 73 13 Blinks Error Code 74 14 Blinks Error Code 75 Troubleshooting No Power/Dead Unit 76 Troubleshooting No Power/Dead Unit (Power LED is Off) 77 78 Quick Procedure To Check For Short or Low Resistance Condition of the Vda Line
79
TV’s Behavior After Connectors Removal 80 Procedure to Check The Power Supply (Without Any Load) 81 Procedure to Check The Power Supply (Without Any Load) 82
2011 Series Line Up And Available Sizes
VT GT ST
One Sheet of Glass
Thin MetalBezel
S
HorizontalGradation
(Partial Back-cut)Piano Black
Full Gradation
(Full Back-cut)
65 5565 65 60 55 50 46 50 4250 65 60 55
50 46 42
60 4642
FULL HIGH DEFINITION (1080p)
X
HD LeaderFHD LeaderFHD CoreFHD DeluxeFHD Premium 3D
HIGH END
LOW END
HD (720p)
Series Series Series Series Series
Slide 4
Features
Slide 5
2011 Premium 3D PDP Line up And Feature Comparison
Slide 6
New Technical Features2 new technical features have been added to the 2011 models to assist the service technicians speed up the repair process.
The ability of the power LED to match the number of blinks of the first and last SOS blinking codes detected by the TV as listed on the “SELF Check” menu.
The delaying of the power LED blinking reaction by 10 seconds when the SC/SN board is isolated.
1st. occurrence
after shipment
3rd occurrence before last
2nd. occurrence
after shipment
Last
Before last
The power LED can be forced to duplicate the number of blinks of the first and last SOS conditions detected by the TV. This can be done while the power LED is blinking after a shutdown condition has occurred.
Procedure:
To duplicate the number of blinks of the last SOS detected.
While the power LED is blinking, press the “VOL+” on the remote control once to make the power LED blink the same number of times as the last blinking code detected by the TV.
To duplicated the number of blinks of the first SOS detected.
Press the “VOL-” once to make the power LED match the number of blinks of the first SOS blinking code detected.
This can help in determining if the symptom shown by the TV when it first failed (Most likely during operation), has changed to another blinking code when checked by the service technician.
Press VOL+ to see the last SOS detected
Press VOL- to see the first SOS detectedPTCT: 0a . 0a . 0a . 0a . 06
SOS History as shown on the “Self Check”
menu
New
Slide 7
Charging the 3D Glasses1. Turn off the TV.2. Set the 3D Eyewear power switch to “OFF”.3. Connect the 3D glasses to the TV as shown in the diagram below.4. Turn on the TV.5. The indicator LED on the glasses lights red, and charging starts.6. When the LED turns off, charging is complete. (Approximately 2 hours
required)7. Turn off the TV and remove the charging cable.
Note: Turn on the TV when charging the 3D glasses. The battery will not be charged when the television power is off.
Slide 8
Connection (Mini Adapters)
Slide 9
Boards LayoutTC-P55VT30
Slide 10
Connections (Mini Adapters Part Number)
Antenna adapter K1TYYYY00158VIDEO adapter K2KYYYY00136Component adapter K2KYYYY00137Audio adapter K2KYYYY00138Optical adapter K7CXGYC00002PC adapter K1HY20YY0007RS232C adapter K1HY03YY0013
Part # K1TYYYY00158
Part # K2KYYYY00136
Part # K2KYYYY00137
Part # K2KYYYY00138
Part # K7CXGYC00002
Part # K1HY20YY0007
Part # K1HY03YY0013
Note: Mini adapter manufactured for other companies may not be comparable with Panasonic TVsSlide 11
Service port (M3 mini Jack) Specifications The Service port (M3 mini Jack) on the following TVs can use as the RS232C terminal which is a standard computer SERIAL interface. Note: This operation system should be used by the certified professional dealer.
PC Control of the TVThe TV can be controlled by a personal computer when connected through an RS232C/ M3 mini jack conversion cable (not supplied). The computer will require software which allows sending and receiving of control data through its SERIAL port.
Slide 12
2011 PDP Extension Cable list (GT30 series)Model : TC-P50 / 55 / 60 / 65 GT30
Slide 13
2011 PDP Extension Cable for A board (GT30 series)
Slide 14
2011 PDP Extension Cable for P board (GT30 series)
Slide 15
2011 PDP Extension Cable list (VT30 series / FHD)
Slide 16
SOS Detect Circuit
Slide 17
PP
AA
IC9300Discharge
Control
A6
3.3V
A20
A32
5V
13
UHZ
SOS6
SOS7
UHZ
SOS8
18
11
9
17
10
15
16
18
1
29 30
P15V
P5V
P3.3V
P5V
C3C3C2C2
SCSCENERGY
RECOVERY
SC2
(6X) SOSDETECT
15V_F/5V_FSU/SD conn.
DETECT
SOS6
SOS7
35
VF_G
VF_G
SC50
15V
SSSS
ENERGYRECOVERY
(8X) SOSDETECT
15V
SOS8
SC20
SS11
P6 13
1Vsus
Vsus1
4
UHZ
P5V
PAN
EL M
AIN
ON
P15VVda VsusP2P11
C31
SC42
SC41
67
21
20
VscanDETECT
18
1
4
1
SS61
SS66
D16583D16253
SS331,2 20
Vsus pulseVsus pulse
PANEL_SOS(6-9)
IC5000ANALOG- ASIC
1 2
C2154,55
P3.3V
P3.3V
4
4
SOS4
12
SOS9
IC8000PEAKS-LDA3
SOS10(3)SOS10(5)
SSDD
SUSU
SD42
SU41
SU11
SD11
TC-P50GT308
10,11
A31
25 26 5 6
F15V
P5V/SUB5VP3V/SUB3.3V
C26 C3628 3
1
55
C_3.3V _DET
10,11
AH16
TUN
ER S
UB
ON
7
71
1
Vscn/Vda/
15V_F/5V_F
C1C1
FAN_SOS
A40
19 20
1
A8
C10 C20
38
3
1
2
339
40
53
SOS Detect Circuit Schematic (TC-P50G30)
Slide 18
PP
AA
IC9300Discharge
Control
A6
3.3V
A20
A32
5V
13
UHZ
SOS6
SOS7
UHZ
SOS8
18
11
9
17
10
15
16
18
1
29 30
P15V
P5V
P3.3V
P5V
C3C3C2C2
SCSCENERGY
RECOVERY
SC2
(6X) SOSDETECT
15V_F/5V_FSU/SD conn.
DETECT
SOS6
SOS7
35
VF_G
VF_G
SC50
15V
SSSS
ENERGYRECOVERY
(8X) SOSDETECT
15V
SOS8
SC20
SS11
P6 13
1Vsus
Vsus1
4
UHZ
P5V
PAN
EL M
AIN
ON
P15VVda VsusP2P11
C31
SC42
SC41
67
21
20
VscanDETECT
18
1
4
1
SS61
SS66
D16583D16253
SS331,2 20
Vsus pulseVsus pulse
PANEL_SOS(6-9)
IC5000ANALOG- ASIC
1 2
C2154,55
P3.3V
P3.3V
4
4
SOS4
12
SOS9
IC8000PEAKS-LDA3
SOS10(3)SOS10(5)
SSDD
SUSU
SD42
SU41
SU11
SD11
TC-P55VT30
8
10,11
A31
25 26 5 6
F15V
P5V/SUB5VP3V/SUB3.3V
C26 C3628 3
1
55
C_3.3V _DET
10,11
AH16
TUN
ER S
UB
ON
7
71
1
Vscn/Vda/
15V_F/5V_F
C1C1
FAN_SOS11
A40
19 20
1
A8
C10 C20
38
3
1
2
339
40
53
IC9500Discharge
Control7SOS9
SOS8
SOS Detect Circuit Schematic (TC-P55VT30)
Slide 19
Voltage Distribution
Slide 20
P15V(to A20)
+15V 13
A6
Picture signal3rd
EEPROMEEPROMIC8901
STB5V
1st
6
SW ResetSW ResetIC5606
TV_SUB_ON7
PANEL_MAIN_ON1
SUB9V
TC-P55GT30
SUB5V4 SD card
JK8650
Peaks LDA3Peaks LDA3
IC8000
1.1V
3.3V
1.1V
3.3V
IC9860
P1.1V LP1Discharge control
Sub-field Conv.
LP1Discharge control
Sub-field Conv.
IC9300
SUB3.3V / P3.3V
2.5V 2.5V IC9820
1.8V 1.8V IC8702
P2.5V
TUNERTUNERTU4801
SUB1.8V
SUB9VV / ASWV / ASW
IC3001
3.3V
1.2V
RESET
3.3/1.8V
9V
3.3V
1.2V
RESET
3.3/1.8V
9V
IC5000
STB3.3V
STB1.2VSTB_RST
VDDSD18V33V
STB5V
AMPAMPIC490015
SOUND15V /SOUND15VR+15V_S
1.2V
1.5V
1.2V
1.5V
IC8100SUB1.2V
SUB1.5V
F+15V
F15V / DCDCIN
PA5601(fuse)
2nd
10
11
DDR3DDR3IC8201
DDR3DDR3IC8200
SUB5V / P5V5V 5V IC8701 3.3V 3.3V
IC8706 HDMI3.3V/HDMI_SW3.3V
STB3.3V3.3V 3.3V
IC5251SUB_AI_3.3V
A1
1LEDRemote3
LEDDRV5V5V 5V
IC5900PA5900(fuse)
IR for 3DIR for 3DIC5901
JK8533
USB5V5V 5V
IC5350
USBUSB_SW USB_SW
IC8531
USB_SW USB_SW IC8532
JK8532USB
1
1
PA5440(fuse)
A3255SUB5V / P5V
To SC
A20
1
29
30
P15V
SUB3.3V / P3.3V2nd
3rd
F15V / DCDCIN
HDMI SWHDMI SWIC4700
Reg _fan Reg _fan
IC5607A81
10
To Fan47
Add to ST30
JK8531
USBUSB_SW USB_SW
IC86071
P15V
Buffer Buffer IC9400/01/02
Buffer Buffer IC9501
A40
19
20 To SS
A312
53
1
EEPROMEEPROMIC9304
EEPROMEEPROMIC8902
Flash ROMFlash ROMIC8900
Temp SenseTemp SenseIC3753
EthernetEthernetIC8601
iPod Authentication
iPod Authentication
IC3900
Power Supply Voltage Distribution (TC-P50GT30)
Slide 21
P15V(to A20)
+15V 13
A6
A31
2
53
1
Picturesignal
3rd
EEPROMEEPROMIC8901
STB5V
1st
6
SW ResetSW ResetIC5606TV_SUB_ON
7
PANEL_MAIN_ON1
< Power Supply Distribution > (TNPH0913**)
SUB9V
TC-P55VT30
SUB5V4 SD card
JK8650
Peaks LDA3Peaks LDA3
IC8000
1.1V
1.1V
1.1V
1.1V
IC9860
P1.1V_MLP1
Discharge controlSub-field Conv.
LP1Discharge control
Sub-field Conv.
IC9300
SUB3.3V / P3.3V
2.5V 2.5V IC9820
1.8V 1.8V IC8702
P2.5V
EEPROMEEPROMIC9304
TUNERTUNERTU4801
SUB1.8V
SUB9VV / ASWV / ASW
IC3001
EEPROMEEPROMIC8902
Flash ROMFlash ROMIC8900
Temp SenseTemp SenseIC3753
EthernetEthernetIC8601
iPod Authentication
iPod Authentication
IC3900
3.3V
1.2V
RESET
3.3/1.8V
9V
3.3V
1.2V
RESET
3.3/1.8V
9V
IC5000
STB3.3V
STB1.2VSTB_RST
VDDSD18V33V
STB5V
AMPAMPIC4900
15
SOUND15V /SOUND15VR+15V_S
1.2V
1.5V
1.2V
1.5V
IC8100SUB1.2V
SUB1.5V
F+15V
F15V / DCDCIN
PA5601(fuse)
2nd
10
11
DDR3DDR3IC8201
DDR3DDR3IC8200
SUB5V / P5V5V 5V IC8701 3.3V 3.3V
IC8706 HDMI3.3V/HDMI_SW3.3V
STB3.3V3.3V 3.3V
IC5251SUB_AI_3.3V
A1
1LEDRemote3
LEDDRV5V5V 5V
IC5900PA5900(fuse)
IR for 3DIR for 3DIC5901
JK8533
USB5V5V 5V
IC5350
USBUSB_SW USB_SW
IC8531
USB_SW USB_SW IC8532
JK8532USB
1
1
PA5440(fuse)
A3255
SUB5V / P5V
To SC
A20
1
29
30
P15V
SUB3.3V / P3.3V
2nd
3rd
F15V / DCDCIN
HDMI SWHDMI SWIC4700
Reg _fan Reg _fan
IC5607A81
10
To Fan47
Add to GT30JK8531
USBUSB_SW USB_SW
IC86071
P15V
Buffer Buffer IC9400/01/02
Buffer Buffer IC9501
A40
19
20 To SS
AMPAMPIC4901 232C Driver232C Driver
IC3002
LP1Discharge control
Sub-field Conv.
LP1Discharge control
Sub-field Conv.
IC95003.3V 3.3V IC9830
P1.1V_S
Add to ST30
Power Supply Voltage Distribution (TC-P55VT30)
Slide 22
Signal Processing
Slide 23
AA
IC3001
VideoSwitch
IC3001
VideoSwitch
AV1
SD card
PC terminal
Monitor out
Compo nent1,2
Antenna terminal
TU4801TUNER
TU4801TUNER
LVDS
IC8000(Peaks LDA3
/sLD2)
ResizeIP conv.
IC8000(Peaks LDA3
/sLD2)
ResizeIP conv.
OSD
Analog
Serial data
HDMI1/2
IC9300Sub-fieldConv.Dischargecontrol
Test-pattern
IC9300Sub-fieldConv.Dischargecontrol
Test-patternRGB data timing
Scan control
Sustain controlLAN
IC5901IR for 3D eyewear
IC5901IR for 3D eyewear
HDMI3/4 IC4700
HDMI_SWIC4700
HDMI_SW
USB1/2/3
GT30 Models Video Signal Flow
Slide 24
AA
IC3001
VideoSwitch
IC3001
VideoSwitch
AV1
SD card
PC terminal
Monitor out
Compo nent1,2
Antenna terminal
TU4801TUNER
TU4801TUNER
LVDS
Analog
Serial data
HDMI1/2
IC9300Sub-field Conv.DischargecontrolTest-pattern
IC9300Sub-field Conv.DischargecontrolTest-pattern RGB data timing
Scan control
Sustain controlLAN
IC5901IR for 3D eyewear
IC5901IR for 3D eyewear
HDMI3/4 IC4700
HDMI_SWIC4700
HDMI_SW
USB1/2/3
IC9500Sub-field Conv.DischargecontrolTest-pattern
IC9500Sub-field Conv.DischargecontrolTest-pattern
RGB data timing
IC8000(Peaks LDA3
/sLD2)
ResizeIP conv.
IC8000(Peaks LDA3
/sLD2)
ResizeIP conv.
OSD
VT30 Models Video Signal Flow
Slide 25
Signal Processing Circuit (GT Series)
Slide 26
Signal Processing Circuit (VT Series)
Slide 27
Boards LayoutTC-P55VT30
Slide 28
PCB Part List
Slide 29
SOS Detect Circuit (Shutdown) When an abnormality occurs in the unit, the “SOS Detect” circuit is triggered and the TV shuts down. The power LED on the front panel will flash a pattern indicating the circuit that has failed.
Slide 30
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
Some steps require removal of connectors and sometimes PC boards removal. Do not allow the TV to run for more than 30 seconds while connectors or boards are disconnected.
NOTE: When taking voltage reading, place your meter’s probe on the test point or pin indicated before connecting the TV to the AC line. The voltage you intent to measure may only appear for a brief moment.
Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.
Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line before reconnecting P2/SC2 or P11/SS11.
Cautions
Slide 31
Power LED Error Code Definition (1 of 2)LIST OF BOARDS POSSIBLY CASUSING THE FAILURE POWER LED
ERROR CODE
CIRCUIT MONITORED CONDITIONS TRIGGERING THE SHUTDOWN MOST
COMMON 2ND OCCASIONALLY RARELY
NO BLINLK SOLID RED LSI Error
Shorted Vsus Shorted Vda Shorted P15V
SC - SS P A Panel
1 BLINLK Panel Information SOS PD5 Start-up SOS
Communication problem between the System CPU (IC8001) and the Panel CPU (IC9003) A ¤ ¤ ¤
4 BLINKS Power Supply output voltages
Regulation issues with any of the voltages output from the power supply. Wrong diagnostic by the A board
P A ¤ ¤
6 BLINKS SC Energy Recovery Circuit
An increase or reduction of the Energy Recovery Circuit output (MID). Open connection of the P15V line between the P and A board. Open connection between any of the ribbon cables on the C boards and the A board. Open connection between the ribbon cable/cables interconnecting the C boards. Wrong diagnostic by the A board.
SC A ¤ C
7 BLINKS Scan Drive Circuit and
Connection between the SC board and the SM(SU/SD)
board.
Missing Vsus. Abnormality of the scan circuit output, the 15V_F, the scn_pro, and Vscn circuit. Loose or open Connection between the SC board and the SM(SU/SD) board (SC41, SC42, SC46). Open or loose connection between connectors SC2/P2 Wrong diagnostic by the A board Defective Panel
SC SU-SD/SS Panel A
8 BLINKS Sustain Drive Circuit and
Connection between the SS board and the Panel.
Abnormality of the Sustain drive circuit. Open or loose connection between the SS board and FPCs from the panel (SS61, SS64, SS21, SS24, and SS58). Open or loose connection between connectors C10/C20 Open or loose connection between A20 and SC20. Wrong diagnostic by the A board
SS Panel A C2
Note: When connector SC20/A20 is disconnected on the 2011 models, the TV shuts down with 8 blinks. When this is done on the 2009 and 2010 models, the TV shuts down with 6 blinks.
Slide 32
Power LED Error Code Definition (2 of 2)
LIST OF BOARDS POSSIBLY CASUSING THE FAILURE POWER LED ERROR CODE
CIRCUIT MONITORED CONDITIONS TRIGGERING THE SHUTDOWN MOST
COMMON 2ND OCASSIONALLY RAREALLY
9 BLINKS DCC Discharge Control Circuit
Failure of PD4 IC9300 (Discharge control) A
10 BLINKS SUB5V – SUB3.3 – F15V Tuner Power Down
Abnormalities of the F+15V and derivate Sub-voltages. • Reasons: • The P board is not generating the F+15V • SUB Voltages are affected by the K board or by
metal object present in the SD card slot.. Wrong diagnostic by the A board.
P A
12 BLINKS AUDIO AMP Abnormalities of the Audio AMP Pinched speaker wire. Wrong diagnostic by the A board.
A ¤ ¤ ¤
13 BLINKS Communication error
between Stby section and Main processor within the
Peaks SLD/LDA IC
Abnormal operation of the Peaks SLD/LDA IC Wrong diagnostic by the A board. A
14 BLINKS This code is triggered if there are abnormalities during data
exchange with the standby CPU ROM.
No F15V connected to the A board at plug-in (Open connection of both pins 10 & 11 between P6 and A6) Shorted F15V developed after the TV is up and running. Holding the power switch for over 5 seconds after the unit has gone into shut down and it’s in lock mode with the power LED solid red (Note: the LED stays on if the power button is momentarily pressed).
A- P
Slide 33
Boards LayoutTC-P55VT30
Slide 34
SOS Blinking Codes/Troubleshooting Flowchart
Slide 35
Troubleshooting Solid Red LED Shutdown Failure
Slide 36
Behavior Comparison Between 2009/2010 and 2011 Models When Shorted Vsus, Vda, or P15V
Behavior Comparison Between 2009/2010 and 2011 Models When Shorted Vsus, Vda, or P15V
Year 2009/2010 2011
Series All Models X – S – ST GT -
VT
Shorted
Vsus
4 -7 -10 Blinks
Locked Solid Red LED
7 Blinks
Vda
P15
Locked Solid Red LED
(14 Blinks, If TV is Turned On After the 2nd Relay Click)
Dead (LED is Off)
NOTE: Unlike the 2011 lower-end models, the result of a shorted Vsus, Vda, or P15 is not a Solid-Red-LED for GT and VT modes. This condition will only occur when the F15V is missing while the TV is on.
Slide 37
Solid Red LED Error Code (Locked Mode)
These conditions can cause the TV to shutdown while the power LED stays on (Solid red)
New
1. Missing F15V while the TV is on
Open connection between pins 10 and 11 of connectors P6 and A6.
2. Wrong diagnostic by the A board
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)
NOTE: When taking voltage reading, place your meter’s probe on the test point or pin indicated before connecting the TV to the AC line. The voltage you intent to measure may only appear for a brief moment.
NOTE: Unlike the 2011 lower-end models, the result of a shorted Vsus, Vda, or P15 is not a Solid-Red-LED for GT and VT modes.
Slide 38
Troubleshooting Solid Red LED Failure (Locked Mode)
BlinkCode
List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
Solid Red A P SC - SS
Yes
Check connections between connector P6 on the P board and A6 on the A board. If the problem persists, unplug the TV and disconnect SC20, SS33, and C10/C20. Reconnect the TV and turn the power on. Then, after the power LED turns on, press the power switch again to turn the TV off.
No Did the TV turn
off?
Start Here
Unplug the TV and reconnect it. Turn the power on and measure the voltage on pin 10 of connector P6.
Replace the P board
Power LED stays on
Is there 15V present?
Replace the A board.
Unplug the TV and reconnect SC20 and C10/C20 only (See
Note1 before reconnecting C10/C20). Turn the power on.
Then, after the power LED turns on, press the power switch again
to turn the TV off.
YesNoDid the TV turn off?
Replace the SC board
YesNo
Replace the SS board
To confirm that the TV is on Locked Mode, 1st, press the power switch to turn on the TV, then when the LED turns on, press the power switch to turn the TV off. If the LED stays on, the TV is on Locked Mode but if the LED goes off, then the symptom is different (Like no video or black screen).
New
Note 1: Remove connector P35 from the P board before
reconnecting C10/C20. Then reinstall P35 after C10/C20 is
reconnected.
Slide 39
Troubleshooting 1 Blink Failure
If the TV shuts down and the power LED blinks 1 time, replace the A
(PD4 Startup SOS/Panel Information SOS)
Start Here
Slide 40
Troubleshooting 4 Blinks Failure
Slide 41
4 Blinks Error Code (Abnormality of Power Supply Output )
1. Regulation issues with any of the voltages from the power supply.
If P15V goes over a preset level.
If F15V goes over a preset level.
If Vsus goes over a preset level..
If Vda goes above a preset level.
2. Wrong diagnostic by the A board
These conditions can cause the TV to shutdown and the power LED to blink 4 times
The power supply outputs STB5V, F+15V, Vsus, Vda, and P15V. These voltages are necessary to drive the different circuits in the TV.
In order to provide protection for the TV, these voltages are monitored. An increase on any of these voltages is detected and I651 outputs a shutdown voltage (SOS4_PS) to the System CPU to disable the Unit.
A 4 blinks condition is normally caused by the P board or the A board.
IC8000-2
PeaksLDA3
StandbyuCOM
SystemuCOM
P_SOS4A6
4 AJ16
4 blinks
P
P6
4
A
I651Error Det.
VsusVda
P15V
F15V
Slide 42
Troubleshooting 4 Blinks FailureBlinkCode
List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
4 Blinks P A
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)
Yes
Place the positive lead of a voltmeter at pin 4 of connector P6 while the black lead is connected to ground (Chassis ground). Plug in the TV and turn it on
NoDoes the voltage go up briefly to approx. 3.3V?
Start Here
Replace the A board
Replace the P board
Slide 43
Troubleshooting 6 Blinks Failure
Slide 44
6 Blinks Error Code Circuit Explanation
6 Blinks SOS
Energy Recovery/Vscan
The energy recovery circuit and Vscan are monitored in the SC board. Failure of any these 2 circuits triggers the SOS6 line causing the unit to shut down and the power LED to blink 6 times.Under normal operation, the output voltage (MID) of the “Energy Recovery” circuit ranges between 68V and 138V. If the voltage drops below 67V or increases above 139V, the error detect circuit (IC16581) is triggered. This causes a high to be output to pin 15 of connector SC20.Pin 15 of SC20 (SOS6-SC1) also goes high, if the Vscan generating circuit fails.
The voltage from SC20 is connected to the Peaks – LDA3 (IC8000) on the A board via the DC level shifter section of the ASIC (Application Specific) IC (IC5000)If this voltage goes high, the TV shuts down and the power LED blinks 6 times.
This condition is normally caused by a defective SC, A, or P board. (SC>A>P).6 blinks can also be caused by open connection between the C boards and open connection between any of the C board and the A board.
Slide 45
6 Blinks Error Code (SC Energy Recovery Circuit Abnormality)
1. An increase or reduction of the Energy Recovery Circuit output (MID).
2. Wrong diagnostic by the A board
These 2 conditions can cause the TV to shutdown and the power LED to blink 6 times
Note: Disconnecting SC20/A20 on the 2011 models causes the TV to shut down with 8 blinks instead of 6 blinks like it was the case of the 2009 and 2010 models.
New
Slide 46
Troubleshooting 6 Blinks FailureBlinkCode
List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
6 Blinks SC A P
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)
Yes
Check connections between the A board and the C and SC boards. Make sure that all connectors are properly seated. Unplug the TV and remove connectors SC20 from the SC board. Connect the TV and turn it on.
No Did the number of blinks
changed?
Start Here
Replace the A board
Replace the SC board
Unplug the TV and get ready to measure the voltage at pin 13 of connector P6. Plug in the TV and turn it on.
No YesReplace the P board
Still 6 Blinks 8 Blinks
Is there 15V
present?
Slide 47
Troubleshooting 7 Blinks Failure
Slide 48
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)
Preparation:Disconnect AC Power prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector.Remove the front cabinet and expose the panel to a bright light for a thorough visual inspection. Check for cracks and blown pixels or any other abnormalities.Check for burnt panel driver ICs on the SU and SD boards.If the panel is defective, the SU, SD, and/or the SC board may also be defective.
Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.
Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line before reconnecting P2/SC2 or P11/SS11.
7 Blinks Error Detect Circuit1. Missing or shorted Vsus.
2. Shorted Vda
3. Abnormality of the scan circuit output, the 15V_F, the scn_pro, and Vscn circuit.
4. Defective Panel.
5. Loose or open Connection between the SC board and the SU/SD boards.
6. Wrong diagnostic by the A board
These 6 conditions can cause the TV to shut down and the power LED to blink 7 times
The SOS7 circuit monitors the panel, the scan circuit output, the 15V_F, the scan_pro, Vscan, and the physical connection between the SC board and the SU and SD boards (CHA).
If any abnormality occurs on any of these lines or Vsus is missing, the TV shuts down and the power LED blinks 7 times. If any of the connectors between the SC and the SU or SD board is open, the TV also shuts down and the power LED blinks 7 times.
BlinkCode
List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
7 Blinks SC SU - SD SS P A Panel
Slide 49
Quick Procedure To Check For Short or Low Resistance Condition of the Vsus, Vda, and P15V Lines
1. Make sure the TV is disconnected.
2. Remove any residual charge from the Vsus and Vda lines by momentarily grounding them through a 500 ohms resistor (At least 5Watts).
3. Measure the resistance between chassis ground and the pins indicated on the table below. A dead short or a reading lower than 1K indicates a shorted or partially shorted line.
Note: Vsus is generated by the Power supply and is only used by the SS and SC boards
Vda is generated by the Power supply and is only used by the Panel (Panel Drive ICs)
P15V is generated by the Power supply and is used by the A, SS, and SC boards
Test points for the Vsus, Vda, and P15V can be easily found on the P board. To check for short circuit or low resistance on these lines, follow this procedure:
Preparation
Voltage Test Points
Connector Pin Number Voltage
P11 1 Vsus
P11 4 P15V
P35 1 Vda
Slide 50
Troubleshooting 7 Blinks Failures (GT and VT Series)Note: Perform firmware upgrade after replacing the SC board or the SS board
Follow the procedure on the previous slide to check the Vsus, and Vda for short circuit or low resistance reading.
Is there a short circuit of the
Vsus or Vda,?
YesNo
Start Here
Shorted Vda
Shorted Vsus
Continue on next slide (A)
Continue on next slide (B)
Unplug connectors P2 and P11, on the P board. Measure the resistance between pin 1 of connector P2 and ground (Chassis)
Measure the resistance between pin1 of connector SC2 on the SC board
and ground (Chassis).
YesNo Is there a short
circuit?
Replace the P board
YesNo Is there a short
circuit?
Measure the resistance between pin1 of connector SS11 on the
SS board and ground (Chassis).
YesNo Is there a short
circuit?
Replace the SC board
Replace the SS and the SC boards
Replace the SS
Unplug the TV and disconnect SC20 on the SC board. Turn
the power on
How many times is the power LED blinking?
ReplaceThe A board7 Blinks
8 Blinks
Slide 51
Detailed Troubleshooting Procedure for Shorted Vda
From the previous slide (B)
YesNo Replace the P board
Is there a short
circuit ?
Reconnect the ribbon cable between the C2 and C3 boards and unplug the ribbon cable between the C1 and C2 boards. Measure the resistance between pin 1 of connector P35 on the P board and ground (Chassis)
YesNo Is there a short
circuit?
Yes NoIs there a short
circuit?
The problem could be the C2 board or the panel. Proceed to isolate the panel from the C2
board to determine which is bad.
The problem could be the C1 board or the panel. Proceed to isolate the panel from the C1
board to determine which is bad.
Reconnect P35 and unplug the ribbon cable between the C2 and C3 boards. Measure the resistance between pin 1 of connector P35 on the P board and ground (Chassis)
The problem could be the C3 board or the panel. Proceed to isolate the panel from the C3
board to determine which is bad.
Unplug the TV and remove connector P35. Check the resistance between pin 1 of connector P35 on the P board and ground (Chassis).
From the previous slide (A)
Continue on next slide (A)
Unplug the TV and
reconnect SC20.
Perform the VSCN- F/5V_F
resistance test as
indicated on the next slide
8 Blinks
Note: For Slim models (GT & VT30), go to the slide after
the next.
Slide 52
VFO/VSCN_F and VF_5V Resistance Test (46”, 50”, and 55” FHD (S30 and ST30))This test can be used to quickly determine if either the SU, SD, or/and the SC board are bad. Note: even though a short circuit is a clear indication of a defective board, a no-short-circuit condition does not necessarily means that the boards are good. Follow the isolation procedure to determine if these boards are good or bad.
Preparation:
Unplug the TV prior to making any disconnection or connection.
Wait at least 2 minutes before removal of any connector.
Note: If the power LED continues to blink even after the TV has been unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.Resistance Test
Procedure to determine if there is a short
circuit or low resistance reading of the Vfo
(TPSC1) or the VF_5V (R515).
Using VFG (Floating ground screws) as ground,
measure the resistance of:
1. Resistor R515 (TPSC1/VFO)
2. Pin 3 of IC724 (VF-5V)
Continue on the page after the next
Slide 53
VFO/VSCN_F and VF_5V Resistance Test (50”~65” Slim Models (GT30 and VT30))This test can be used to quickly determine if either the SU, SD, or/and the SC board are bad. Note: even though a short circuit is a clear indication of a defective board, a no-short-circuit condition does not necessarily means that the boards are good. Follow the isolation procedure to determine if these boards are good or bad.
Preparation:
Unplug the TV prior to making any disconnection or connection.
Wait at least 2 minutes before removal of any connector.
Note: If the power LED continues to blink even after the TV has been unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.Resistance Test
Procedure to determine if there is a short
circuit or low resistance reading of the Vfo
(TPSC1) or the VF_5V (Junction of R696~R699).
Using VFG (Floating ground screws) as ground,
measure the resistance of:
1. Junction of R696~R699) (TPSC1/VSCN-1)
2. Pin 3 of IC724 (VF-5V)
Continue on the page
Slide 54
Unplug the TV and disconnect connector SU41/SC41 (See the previous slide for location). Follow the VFO/VSCN_F and VF_5V Resistance Test procedure explained on the previous slide.
With SC41/SU41 disconnected,
disconnect SC42/SD42 and follow the
resistance test on the previous slide.
YesNo Is there still a short circuit?
Replace the both the SU
and SD boards
YesNo Is there a short
circuit?Replace the SC
board
Replace the SC, SU, and SD
boards
Disconnect connectors SC41/SU41, SC42/SD42, and SC46/SD46 and
remove the VFG screws from the SU and SD boards. Then install the SC
board Jig (P/N or jumper across pins 1 and 2 of connector SC50 (See the next
slide for location)Plug in the TV and press the power
switch.
YesNo Does the TV turn on andstay on ?
(Black screen)
Replace the SC, SU, and SD
boards
Note: If either the SU or SD board is shorted, all 3 board must replaced together (SU, SD, and SC). Is highly likely that the SC board may be also bad even though it
does not show a short circuit.
Yes NoIs there a short circuit?
From previous page
Replace the SC board
Even though this procedure only indicates that the SD board is bad, all
3 boards (SU,SD, & SC) should be replaced at the same time
Even though this procedure only indicates that the SU board is bad, all
3 boards (SU,SD, & SC) should be replaced at the same time
Slide 55
SU-SD boards Isolation Procedure
Procedure:1. Remove the 4 VFG screws from the SU and SD
boards. (See picture on the left side.)
2. Remove SC41, SC42, and SC46 from the SC board. Also remove the ribbon cable between the SU and SD boards (SU11/SD11).
3. Install the SC50 Jig or just jump pins 1 and 2 of connector SC50 on the SC board.
Preparation:Disconnect AC Power prior to making any disconnection or connection.Wait at least 2 minutes before the removal of any connector.
Note: Remove the jig or the jumper after completing the isolation procedure.
Actual SC50 Jig
4. Plug-in the TV and turn it on.
Warning:
When performing this procedure, isolate the SU and SD boards together at the same time. Do not attempt to isolate the SU or the SD boards individually. This could cause further damages to the TV
Slide 56
Troubleshooting 8 Blinks Failure
Slide 57
8 Blinks Error Code
The SOS Detect circuit in the Sustain board monitors:Physical connection between the panel and the SS board.The output of the sustain drive circuit.
Under normal condition, Q16280 is on. When Q16280 is on, a low is provided to the anode of D16255.If any abnormality occurs on the sustain drive circuit or one of the FPC cables (SS53, SS54 or SS56) opens, Q16255 turns off and a high is provided to the anode of D16255 (D255). This high is provided to pin 10 of IC5000 on the A board. When this happens, the TV shuts down and the power LED blinks 8 times.
To determine if the 8 blinks is caused by the A board, SS board, or the Panel:• Isolate the SS board and check if the TV stays on when it’s turned on.• If the TV does not stay on after disconnecting the SS board, the A board is defective. • If the TV stays on, then the SS or the Panel is defective. • Check continuity between pins 1 and 2 of connectors SS53, SS54 and SS56. If open, the panel might
be defective. (Check for loose connection between the flex-cables and the SS board).• If continuity is OK, the SS board is defective.
1. Abnormality of the Sustain drive circuit.
2. Open or loose connection between the SS board and FPCs from the panel.
3. When SS53, SS54 or SS56 are disconnected.
4. When SC20 is disconnected.
5. Wrong diagnostic by the A board
These 5 conditions can cause the TV to shut down and the power LED to blink 8 times
Slide 58
8 Blinks Error Detect Circuit
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
Wait at least 2 minutes before the removal of any connector.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)
Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.
Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line before reconnecting P2/SC2 or P11/SS11.
BlinkCode
List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
8 Blinks SS A Panel
Slide 59
8 Blinks Error Detect Circuit
PP
AA
IC8000Peaks-LDA3
5V
13
SOS8SOS8AH161210
P5V
SSSS
ENERGYRECOVERY
IC16251(8X) SOSDETECT
15V
SS11
13
Vsus1
4
P5V
PAN
EL M
AIN
ON
P15VVda Vsus P11
1
4
SS53
SS54
SS331
Vsus pulse
P5V
Vsus
P15V
D16255
D16255
IC16241
IC5000ASIC
A40
SOS8
A6
P6
71
71
F-ST
B-O
N
1
20
20
SOS8SS56TC-P55VT30
SS2
Slide 60
Troubleshooting 8 Blinks Failure
Yes
Check all the flex-cables between the SS board and the panel. Make sure they are properly seated in the connectors. Unplug the TV and disconnect SS33 on the SS board. Plug in the TV and turn it on
NoReplace the A
board
Does the TV turn on andstay on ?
(Black screen)
Start Here
YesNo Is there continuity ?
Replace the SS board
Check connections between the SS board and the panel. If
ok, then replace the panel
Unplug the TV. Check for continuity between pins 1 and 2 of connector SS53 on the SS
board . Do not plug in the TV.
BlinkCode
List of boards likely to cause this symptom.
Main Suspect
2nd 3rd 4th 5th 6th 7th
8 SS A Panel
Check for continuity between screws ZA102 and ZA106, also between ZA102 and ZA105 on the
SS board . Do not plug in the TV.Note: See previous slide for connectors location.
YesNo Is continuity OK on both
tests?
Slide 61
Troubleshooting 9 Blinks Failure
Slide 62
9 Blinks Error Code
1. Failure of PD4 IC9300 (Discharge control)
This condition can cause the TV to shutdown and the power LED to blink 9 time
IC5000ASIC
IC8000-1PeaksLDA3
Main System MPU
AH16PANEL_SOS
12
SOS_DCC (9) (D_SOS_RSV)
IC9300
D3
(Analog output)6 – 9 blinks
8
A
SOS-6
SOS-7
SOS-8
9 blinks can be caused by failure of IC9300, IC5000, or IC8000. Since all these ICs are located on the A board, only the A board should be replaced when a blinks condition is detected.
Slide 63
Troubleshooting 9 Blinks Failure
Start Here
Replace the A board
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
BlinkCode
List of boards likely to cause this symptom.
Main Suspect
2nd 3rd 4th 5th 6th 7th
9 A
Slide 64
Troubleshooting 10 Blinks Failure
Slide 65
Troubleshooting 10 Blinks Failure
Start Here
BlinkCode
List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
10 P A
Replace the A board
Plug in the TV and press the power switch immediately after the first relay click from the power supply is heard.
Did the number ofblinks changed?
NO Yes
Blinking 14 timesBlinking 10 times
Replace the P board
Slide 66
Troubleshooting 10 Blinks Failure
Start Here
BlinkCode
List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
10 P A
Replace the A board
Plug in the TV and press the power switch immediately after the first relay click from the power supply is heard.
Did the number ofblinks changed?
NO Yes
Blinking 14 timesBlinking 10 times
Replace the P board
Slide 67
Troubleshooting 11 Blinks Failure
Slide 68
11 Blinks Error Detect Circuit (Fan SOS)
1. If one of the fans opens or increases resistance.2. If connector A8 is not seated properly.3. If the A board becomes defective triggering the shutdown circuit.
These 3 conditions can cause the TV to shut down and the power LED to blink 11 times
Slide 69
Slide 70
11 Blinks Error Code Explanation
The ventilation fans are monitored to be sure they are operating properly. If one of the fans opens or increases resistance, the resulting current change is applied to pin 61 of the main CPU (IC8000).
The fan drive circuit is located on the A board. To control the speed of the fan, a control voltage from the microprocessor(IC8000) is applied to IC5607. If any of the fans is removed or becomes defective, a high is output at the corresponding pin (pin 3, 9, or 12) of the fan connector (A8) to forward bias the inline diode. The DC output of the diode is provided to pin 61 of IC8000 to trigger the SOS condition.
Slide 70
Troubleshooting 11 Blinks Failure
Unplug the TV and disconnect the fans, one at a time. (See Fan Caution). Plug in the TV and turn it on.
YesReplace
The A board
Does the power LED stay on when the TV is turned
on?
Replace the Fan.
71
No
Fan Caution:
When a fans is disconnected, place a jumper between pins 2 and 3 (Black and Yellow wires) of the socket/connector that the fan was removed from.
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)
NOTE A: Use a piece of wire, the size of a ¼ watt resistor’s leads as a jumper.
JUMPER WIRE
FAN CONNECTOR
PLUG
Start Here
Slide 71
Normally, If no jumper wire is used on the fan’s connector when a fan is disconnected, the TV shuts down in approximately 3 minutes.
Slide 71
12 Blinks Error Code
The transistor Q4930 monitors the speaker amplifier ICs (IC4900 – IC4901). Pin 3 is normally high. If any of the amplifier ICs or one of the speakers develops a short circuit, pin 3 goes low causing Q4930 to go into conduction and output a high to pin AG22 of the System CPU (IC8000) on the A board.When this happens, the TV shuts down and the power LED blinks 12 times.
1. A Board.2. Pinched speaker wire.3. Speakers
These 3 conditions can cause the TV to shut down and the power LED to blink 12 times
Slide 72
Troubleshooting 12 Blinks FailureBlinkCode
List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
12 A Speaker
Unplug the TV and disconnect connectors A11and A12 from the A board. Plug in the TV and press the
power switch
Does the TV power
up andstay on?
NoYes
If the speakers wires are not pinched,Replace the speaker or Woofer
Replacethe A board
Start Here
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)
Slide 73
13 Blinks Error Code
This condition can happen when the internal communication of the Main processor and the Standby microprocessor within the PEAKS-LDA3 IC is interrupted for more than 3 minutes.
Replace the A boardStart Here
Slide 74
14 Blinks Error CodeThese conditions can cause the TV to shutdown and the power LED to blink 14 times1. No F15V connected to the A board at plug-in (Open connection of both pins 10 & 11 between P6 and
A6)
2. Holding the power switch for over 5 seconds after the unit has gone into shut down and it’s in lock mode with the power LED solid red (Note: the LED stays on if the power button is momentarily pressed).
Unplug the TV and reseat P6/A6, then reconnect the TV. If the problem persists, disconnect the TV again and plug it back in. Get ready to measure the voltage on pin 10 of connector P6. Press the power switch.
Start Here
ReplaceThe A board
ReplaceThe P board
Is 15V present ?
YesNo
Slide 75
Troubleshooting No Power/Dead Unit
1. A Board.2. P Board.3. SC Board4. SS Board5. K Board6. A shorted P15V
These 5 conditions can cause the TV to be dead with no power.
Condition List of boards likely to cause this symptom.
Main Suspect 2nd 3rd 4th 5th 6th 7th
Dead P A SC - SS K
Cautions: Disconnect the AC Power prior to making any disconnection or connection.When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)
Slide 76
Troubleshooting No Power/Dead Unit (Power LED is Off)
Do the AC relaysclick after the TV is plugged
into the AC line?
Is the TV turning On
Is there 5V presentwhen the TV is plugged into
the AC line?
Replacethe A board
ReplaceThe K board (CheckWires between A1
and S1)
ReplaceThe P board
Yes
YesYes
Yes
NO NO
NO
NO Unplug the TV. Place your volt-meter on pin 1 of connector P6. Plug in the
TV and press the power switch
Is there 3.2V present when
the power button is pressed?
Unplug the TV and disconnect A1 on the A board. Plug in the TV and ground pin 8 of connector A1 momentarily
Unplug the TV and place your volt-meter on pin 6 of
connector P6. Plug in the TVBut do not turn the power on
ReplaceThe P board.
(Check the AC Cord)
Unplug the TV and disconnect A1 on the A board. Plug in the TV but do not turn the power on
Plug in the TV. Do not turn the power on
Do the relays click now?YesNO
Replacethe A board
Start Here If the Power Supply squeals, replace the section (P1 or P2) of the P board causing the squealing.
Make sure connectors P34 and P6 are properly seated. Follow the procedure on slide 79 to check the P15V for short circuit or low resistance.
Is there a short circuit of the
P15V?
YesNo
Shorted P15V
Continue on next slide (C)
Slide 77
From the previous slide (C)
Unplug connectors P6 and P11, on the P board. Measure the resistance between pin 15 of connector P6 and ground (Chassis)
Reconnect P11 and measure the resistance between pin 15 of connector P6 and ground (Chassis)
YesNo Is there a short
circuit?
Replace the P board
Disconnect SC20 on the SC board and reconnect P6. Measure the resistance between pin 15 of connector P6
and ground (Chassis)
YesNo Is there a short
circuit?
Replace the SS board
YesNo Is there a short
circuit?
Replace the A board
Replace the SC board
Detailed Troubleshooting Procedure for Shorted
P15V
Slide 78
Quick Procedure To Check For Short or Low Resistance Condition of the Vda Line
1. Make sure the TV is disconnected.
2. Remove any residual charge from the Vda line by momentarily grounding them through a 500 ohms resistor (At least 5Watts).
3. Measure the resistance between chassis ground and the pins indicated on the table below. A dead short or a reading lower than 1K indicates a shorted or partially shorted line.
Vda is generated by the Power supply and is only used by the Panel (Panel Drive ICs)
Test points for the Vda can be easily found on the P board. To check for short circuit or low resistance on this line, follow this procedure:
Preparation
Voltage Test Points
Connector Pin Number Voltage
P35 1 Vda
Slide 79
TV’s Behavior After Connectors RemovalMODEL N0. TC-P55VT30 (Connectors Removal on the SC Board)
Connector Connector Connector on C1 Board
Result
SC2 SOS 7 Blinks
SC20 SOS 8 Blinks
SC2 SC20 SOS 8 Blinks
SC2 C10 SOS 8 Blinks (6 Blinks ST30)
SC20 C10 SOS 8 Blinks (TV Stays On ST30)
SC2 SC20 C10 SOS 8 Blinks (TV Stays On ST30)
MODEL N0. TC-P55VT30 (Connectors Removal on the SS + combination of connectors on the SS board and SC board)
Connector Connector Connector on SC Board
Connector on SC Board
Result
SS11 TV Stays On (SC LED
On)
SS33 TV Stays On (SC LED
On)
SS11 SS33 TV Stays On (SC LED
On)
SS11 SC2 SOS 7 Blinks
SS33 SC2 SOS 7 Blinks
SS11 SS33 SC2 SOS 7 Blinks
SS11 SC20 SOS 8 Blinks
SS11 SC2 SC20 SOS 8 Blinks
SS33 SC20 Fans On for 8 sec, then
SOS 6 Blinks after 20sec
SS33 SC2 SC20 Fans On for 8 sec, then
SOS 6 Blinks after 20sec
SS11 SS33 SC2 SC20 Fans On for 8 sec, then
SOS 6 Blinks after 20sec
MODEL N0. TC-P55VT30 (Connectors Removal on the A Board)
Connector Connector Connector Result
A20 SOS 8 Blinks
A31 SOS 8 Blinks (6 Blinks ST30)
A32 SOS 8 Blinks (6 Blinks ST30)
A20 A31 SOS 8 Blinks (TV Stays ON with Black
Screen ST30)
A20 A32 SOS 8 Blinks (6 Blinks ST30)
A31 A32 SOS 8 Blinks (6 Blinks ST30)
A20 A31 A32 SOS 8 Blinks
Connector Connector Connector Result
SC20 C10 SS33 TV Stays On With Fans Running and Black Screen.
Slide 80
Procedure to Check The Power Supply (Without Any Load)
The Power Supply can be tested without any load by removing several connectors from the P and A boards.
Remove the following connectors from the P board:
P2, P11, and P35.
Remove the following connectors from the A board :
A11, A12, A20, A31, A32, A14, and A40.
Procedure:
1. Plug in the TV. The relays from the P board should click. (Note: if a second click is heard approximately 10~15 seconds after the 1st click, the F15V is confirmed to be present.)
2. Turn the power on. (Note: The power LED should turn on and the fans should be running. If this is the case, measure the Vsus and Vda.)
Vsus can be measured on pin 1 of connector P2 or P11.
Vda can be measured on pin 1 of connector P35.
3. If these voltages are OK, then the power supply is OK. (Note: The TV won’t turn on if there is a short circuit on the P15V.)
Note: If there is a short circuit on the Vsus or Vda lines while this test is conducted;
• The SOS4_PS is not triggered. Pin 4 of connector P6 stays low. (Note: The PS SOS only monitors over-voltage conditions.
• The TV will still turn on without Vsus or Vda.
• The fans will continue to run.
Caution: Do not allow the TV to run for more than 30 seconds when isolating the power supply.
Slide 81
Procedure to Check The Power Supply (Without Any Load)
Remove
Remove
Remove
Remove
Remove
P2
P11
P35A40
A11
A20 – A31 – A32
A14
A12
Slide 82
End
Slide 83