Panasonic TC-PXXGT30 Technical Manual Download

Page: 22 / 83

P15V(to A20)

+15V

A31

Picture

signal

3rd

EEPROM

IC8901

STB5V

1st

SW Reset

IC5606

TV_SUB_ON

PANEL_MAIN_ON

< Power Supply Distribution >

(TNPH0913**)

SUB9V

TC-P55VT30

SUB5V

SD card

JK8650

Peaks LDA3

IC8000

1.1V

IC9860

P1.1V_M

LP1

Discharge control

Sub-field Conv.

LP1

Discharge control

Sub-field Conv.

IC9300

SUB3.3V / P3.3V

2.5V

IC9820

1.8V

IC8702

P2.5V

EEPROM

IC9304

TUNER

TU4801

SUB1.8V

SUB9V

V / A
SW

IC3001

EEPROM

IC8902

Flash ROM

IC8900

Temp Sense

IC3753

Ethernet

IC8601

iPod

Authentication

iPod

Authentication

IC3900

3.3V

1.2V

RESET

3.3/1.8V

3.3V

1.2V

RESET

3.3/1.8V

IC5000

STB3.3V

STB1.2V

STB_RST

VDDSD18V33V

STB5V

AMP

IC4900

SOUND15V
/SOUND15VR

+15V_S

1.2V

1.5V

1.2V

1.5V

IC8100

SUB1.2V

SUB1.5V

F+15V

F15V / DCDCIN

PA5601

（ｆ

use)

2nd

DDR3

IC8201

DDR3

IC8200

SUB5V / P5V

IC8701

3.3V

IC8706

HDMI3.3V/HDMI_SW3.3V

STB3.3V

3.3V

IC5251

SUB_AI_3.3V

LED
Remote

LEDDRV5V

IC5900

PA5900

（ｆ

use)

IR for 3D

IC5901

JK8533

USB5V

IC5350

USB

USB_SW

IC8531

USB_SW

IC8532

JK8532

USB

PA5440

（ｆ

use)

A32

SUB5V / P5V

To SC

A20

P15V

SUB3.3V / P3.3V

2nd

3rd

F15V / DCDCIN

HDMI SW

IC4700

Reg

_fan

Reg

_fan

IC5607

To Fan

4
7

Add to GT30

JK8531

USB

USB_SW

IC8607

P15V

Buffer

IC9400/01/02

Buffer

IC9501

A40

To SS

AMP

IC4901

232C Driver

IC3002

LP1

Discharge control

Sub-field Conv.

LP1

Discharge control

Sub-field Conv.

IC9500

3.3V

IC9830

P1.1V_S

Add to ST30

Power Supply Voltage Distribution (TC-P55VT30)

Slide 22

Summary of Contents for TC-PXXGT30

Page 1: ...Cover Page 2011 Premium 3D Plasma TV Technical Guide and Troubleshooting Flowchart 2011 Plasma FHD TV 14th Generation TC PXXGT30 TC PXXVT30 Panasonic National Training Panasonic Service and Technology Company TTG110901CP ...

Page 2: ...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 Company All rights reserved Unauthorized copying and distribution is a v...

Page 3: ... 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...

Page 4: ...orizontal Gradation Partial Back cut Piano Black Full Gradation Full Back cut 65 55 65 65 60 55 50 46 50 42 50 65 60 55 50 46 42 60 46 42 FULL HIGH DEFINITION 1080p X HD Leader FHD Leader FHD Core FHD Deluxe FHD Premium 3D HIGH END LOW END HD 720p Series Series Series Series Series Slide 4 ...

Page 5: ...Features Slide 5 ...

Page 6: ...2011 Premium 3D PDP Line up And Feature Comparison Slide 6 ...

Page 7: ... 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...

Page 8: ...ram 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 ...

Page 9: ...Connection Mini Adapters Slide 9 ...

Page 10: ...Boards Layout TC P55VT30 Slide 10 ...

Page 11: ...o adapter K2KYYYY00138 Optical adapter K7CXGYC00002 PC adapter K1HY20YY0007 RS232C 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 TVs Slide 11 ...

Page 12: ...IAL interface Note This operation system should be used by the certified professional dealer PC Control of the TV The 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 ...

Page 13: ...2011 PDP Extension Cable list GT30 series Model TC P50 55 60 65 GT30 Slide 13 ...

Page 14: ...2011 PDP Extension Cable for A board GT30 series Slide 14 ...

Page 15: ...2011 PDP Extension Cable for P board GT30 series Slide 15 ...

Page 16: ...2011 PDP Extension Cable list VT30 series FHD Slide 16 ...

Page 17: ...SOS Detect Circuit Slide 17 ...

Page 18: ...ANEL MAIN ON P15V Vda Vsus P2 P11 C31 SC42 SC41 6 7 21 20 Vscan DETECT 18 1 4 1 SS61 SS66 D16583 D16253 SS33 1 2 20 Vsus pulse Vsus pulse PANEL_ SOS 6 9 IC5000 ANALOG ASIC 1 2 C21 54 55 P3 3V P3 3V 4 4 SOS4 12 SOS9 IC8000 PEAKS LDA3 SOS10 3 SOS10 5 S SD D SU SU SD42 SU41 SU11 SD11 TC P50GT30 8 10 11 A31 25 26 5 6 F15V P5V SUB5V P3V SUB3 3V C26 C36 28 3 1 55 C_3 3V _DET 10 11 AH16 TUNER SUB ON 7 7 ...

Page 19: ...a Vsus P2 P11 C31 SC42 SC41 6 7 21 20 Vscan DETECT 18 1 4 1 SS61 SS66 D16583 D16253 SS33 1 2 20 Vsus pulse Vsus pulse PANEL_ SOS 6 9 IC5000 ANALOG ASIC 1 2 C21 54 55 P3 3V P3 3V 4 4 SOS4 12 SOS9 IC8000 PEAKS LDA3 SOS10 3 SOS10 5 S SD D SU SU SD42 SU41 SU11 SD11 TC P55VT30 8 10 11 A31 25 26 5 6 F15V P5V SUB5V P3V SUB3 3V C26 C36 28 3 1 55 C_3 3V _DET 10 11 AH16 TUNER SUB ON 7 7 1 1 Vscn Vda 15V_F 5...

Page 20: ...Voltage Distribution Slide 20 ...

Page 21: ...IN PA5601 ｆuse 2nd 10 11 DDR3 DDR3 IC8201 DDR3 DDR3 IC8200 SUB5V P5V 5V 5V IC8701 3 3V 3 3V IC8706 HDMI3 3V HDMI_SW3 3V STB3 3V 3 3V 3 3V IC5251 SUB_AI_3 3V A1 1 LED Remote 3 LEDDRV5V 5V 5V IC5900 PA5900 ｆuse IR for 3D IR for 3D IC5901 JK8533 USB5V 5V 5V IC5350 USB USB_SW USB_SW IC8531 USB_SW USB_SW IC8532 JK8532 USB 1 1 PA5440 ｆuse A32 55 SUB5V P5V To SC A20 1 29 30 P15V SUB3 3V P3 3V 2nd 3rd F15...

Page 22: ...DDSD18V33V STB5V AMP AMP IC4900 15 SOUND15V SOUND15VR 15V_S 1 2V 1 5V 1 2V 1 5V IC8100 SUB1 2V SUB1 5V F 15V F15V DCDCIN PA5601 ｆuse 2nd 10 11 DDR3 DDR3 IC8201 DDR3 DDR3 IC8200 SUB5V P5V 5V 5V IC8701 3 3V 3 3V IC8706 HDMI3 3V HDMI_SW3 3V STB3 3V 3 3V 3 3V IC5251 SUB_AI_3 3V A1 1 LED Remote 3 LEDDRV5V 5V 5V IC5900 PA5900 ｆuse IR for 3D IR for 3D IC5901 JK8533 USB5V 5V 5V IC5350 USB USB_SW USB_SW IC...

Page 23: ...Signal Processing Slide 23 ...

Page 24: ...ze IP conv IC8000 Peaks LDA3 sLD2 Resize IP conv OSD Analog Serial data HDMI1 2 IC9300 Sub field Conv Discharge control Test pattern IC9300 Sub field Conv Discharge control Test pattern RGB data timing Scan control Sustain control LAN IC5901 IR for 3D eyewear IC5901 IR for 3D eyewear HDMI3 4 IC4700 HDMI_SW IC4700 HDMI_SW USB1 2 3 GT30 Models Video Signal Flow Slide 24 ...

Page 25: ...ub field Conv Discharge control Test pattern RGB data timing Scan control Sustain control LAN IC5901 IR for 3D eyewear IC5901 IR for 3D eyewear HDMI3 4 IC4700 HDMI_SW IC4700 HDMI_SW USB1 2 3 IC9500 Sub field Conv Discharge control Test pattern IC9500 Sub field Conv Discharge control Test pattern RGB data timing IC8000 Peaks LDA3 sLD2 Resize IP conv IC8000 Peaks LDA3 sLD2 Resize IP conv OSD VT30 Mo...

Page 26: ...Signal Processing Circuit GT Series Slide 26 ...

Page 27: ...Signal Processing Circuit VT Series Slide 27 ...

Page 28: ...Boards Layout TC P55VT30 Slide 28 ...

Page 29: ...PCB Part List Slide 29 ...

Page 30: ...ircuit 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 ...

Page 31: ...oltage 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 rec...

Page 32: ...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 SC...

Page 33: ...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 conne...

Page 34: ...Boards Layout TC P55VT30 Slide 34 ...

Page 35: ...SOS Blinking Codes Troubleshooting Flowchart Slide 35 ...

Page 36: ...Troubleshooting Solid Red LED Shutdown Failure Slide 36 ...

Page 37: ...eries 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 ...

Page 38: ...nds 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...

Page 39: ...or 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 Yes No Did the TV turn off Replace the SC board Yes No Replace the SS board To confirm that the TV is on Locked Mode 1st press...

Page 40: ...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 ...

Page 41: ...Troubleshooting 4 Blinks Failure Slide 41 ...

Page 42: ...wer 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 ...

Page 43: ...f 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 con...

Page 44: ...Troubleshooting 6 Blinks Failure Slide 44 ...

Page 45: ... 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 bli...

Page 46: ...ry 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 ...

Page 47: ...icated 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...

Page 48: ...nds 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 o...

Page 49: ... 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 ...

Page 50: ... 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 sh...

Page 51: ... 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 Yes No Is there a short circuit Replace the P board Yes No Is there a short circuit Measure the resistance between pin1 of connector SS11 on the SS board and ground Chassis Yes No Is there a short circuit Replace the SC boar...

Page 52: ... 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 rem...

Page 53: ... 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...

Page 54: ...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 TPSC...

Page 55: ...nstall 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 Yes No Does the TV turn on and stay 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 no...

Page 56: ...ctor 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...

Page 57: ...Troubleshooting 8 Blinks Failure Slide 57 ...

Page 58: ...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 betwee...

Page 59: ...onnecting 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 rec...

Page 60: ...8 AH16 12 10 P5V SS SS ENERGY RECOVERY IC16251 8X SOS DETECT 15V SS11 13 Vsus 1 4 P5V PANEL MAIN ON P15V Vda Vsus P11 1 4 SS53 SS54 SS33 1 Vsus pulse P5V Vsus P15V D16255 D16255 IC16241 IC5000 ASIC A40 SOS8 A6 P6 7 1 7 1 F STB ON 1 20 20 SOS8 SS56 TC P55VT30 SS2 Slide 60 ...

Page 61: ...ty 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 Blink Code 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 ZA...

Page 62: ...Troubleshooting 9 Blinks Failure Slide 62 ...

Page 63: ...time IC5000 ASIC IC8000 1 Peaks LDA3 Main System MPU AH16 PANEL_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 ...

Page 64: ...ior 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 Blink Code List of boards likely to cause this symptom Main Suspect 2nd 3rd 4th 5th 6th 7th 9 A Slide 64 ...

Page 65: ...Troubleshooting 10 Blinks Failure Slide 65 ...

Page 66: ...s 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 of blinks changed NO Yes Blinking 14 times Blinking 10 times Replace the P board Slide 66 ...

Page 67: ...s 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 of blinks changed NO Yes Blinking 14 times Blinking 10 times Replace the P board Slide 67 ...

Page 68: ...Troubleshooting 11 Blinks Failure Slide 68 ...

Page 69: ...ne 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 ...

Page 70: ...ain 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 t...

Page 71: ... 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 ...

Page 72: ...eakers 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 ...

Page 73: ...the 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...

Page 74: ...ode 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 board Start Here Slide 74 ...

Page 75: ...onds 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 Replace The A board Replac...

Page 76: ...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 com...

Page 77: ...lug 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 TV But do not turn the power on Replace The 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 Yes NO Replace the A board Start Here I...

Page 78: ...15 of connector P6 and ground Chassis Yes No 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 Yes No Is there a short circuit Replace the SS board Yes No Is there a short circuit Replace the A board Replace the SC board Detailed Troubleshooting Procedure for Shorted P15V Slide 78 ...

Page 79: ...ance 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 Te...

Page 80: ...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 Connec...

Page 81: ...ote 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 te...

Page 82: ...Procedure to Check The Power Supply Without Any Load Remove Remove Remove Remove Remove P2 P11 P35 A40 A11 A20 A31 A32 A14 A12 Slide 82 ...

Page 83: ...End Slide 83 ...

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