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Panasonic TC-PXXGT30, Техническое руководство

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P15V(to A20)

+15V

13

A6

Picture signal

3rd

EEPROM

EEPROM

IC8901

STB5V

1st

6

SW Reset

SW Reset

IC5606

TV_SUB_ON

7

PANEL_MAIN_ON

1

SUB9V

TC-P55GT30

SUB5V

4

SD card

JK8650

Peaks LDA3

Peaks LDA3

IC8000

1.1V

3.3V 

1.1V

3.3V 

IC9860

P1.1V

LP1

Discharge control

Sub-field Conv.

LP1

Discharge control

Sub-field Conv.

IC9300

SUB3.3V / P3.3V

2.5V 

2.5V 

IC9820

1.8V 

1.8V 

IC8702

P2.5V

TUNER

TUNER

TU4801

SUB1.8V

SUB9V

V / A
SW

V / A
SW

IC3001

3.3V

1.2V

RESET

3.3/1.8V

9V 

3.3V

1.2V

RESET

3.3/1.8V

9V 

IC5000

STB3.3V

STB1.2V

STB_RST

VDDSD18V33V

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

（ｆ

use)

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

（ｆ

use)

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

（ｆ

use)

A32

55

SUB5V / P5V

To SC

A20

1

29

30

P15V

SUB3.3V / P3.3V

2nd

3rd

F15V / DCDCIN

HDMI SW

HDMI SW

IC4700

Reg 

_fan 

Reg 

_fan

IC5607

A8

1

10

To Fan

4
7

Add to ST30

JK8531

USB

USB_SW  

USB_SW  

IC8607

1

P15V

Buffer     

Buffer     

IC9400/01/02

Buffer     

Buffer     

IC9501

A40

19

20

To SS

A31

2

53

1

EEPROM

EEPROM

IC9304

EEPROM

EEPROM

IC8902

Flash ROM

Flash ROM

IC8900

Temp Sense

Temp Sense

IC3753

Ethernet

Ethernet

IC8601

iPod 

Authentication

iPod 

Authentication

IC3900

Power Supply Voltage Distribution (TC-P50GT30)

Slide 21

Содержание TC-PXXGT30

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 5: ...Features Slide 5 ...

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

Страница 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...

Страница 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 ...

Страница 9: ...Connection Mini Adapters Slide 9 ...

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

Страница 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 ...

Страница 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 ...

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

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

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

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

Страница 17: ...SOS Detect Circuit Slide 17 ...

Страница 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 ...

Страница 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...

Страница 20: ...Voltage Distribution Slide 20 ...

Страница 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...

Страница 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...

Страница 23: ...Signal Processing Slide 23 ...

Страница 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 ...

Страница 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...

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

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

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

Страница 29: ...PCB Part List Slide 29 ...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

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

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

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

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

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

Страница 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 ...

Страница 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...

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

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

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

Страница 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 ...

Страница 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 ...

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

Страница 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 ...

Страница 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 ...

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

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 83: ...End Slide 83 ...

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