Panasonic TH-42PX80U Service Manual
11th generation full high definition plasma display tv
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- Operating instructions manual (148 pages) ,
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Table of Contents
Troubleshooting
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Summary of Contents for Panasonic TH-42PX80U
- Page 1 Generation Full High Definition Plasma Display TV This Seminar covers the following models: TH-42PX80U, TH-50PX80U, TH-42PZ80U, TH-46PZ80U TH-50PZ80U, TH-42PZ85U, TH-46PZ85U, and TH50PZ85U Panasonic Technology and Service Company National Training...
- Page 2 This page is purposely left blank. Panasonic ideas for life...
- Page 3 Cesar Perdomo Panasonic Service and Technology Company National Training Copyright © 2008 by Panasonic Service and Technology Company All rights reserved. Unauthorized copying and distribution is a violation of law. Warning This service information is designed for experienced repair technicians only and is not designed for use by the general public.
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Page 4: Table Of Contents
Power Supply (Standby) TH-42PX80U-TH50PX80U Sustain Drive Board (SS) Isolation Standby Operation Sustain Drive (SS) Board Isolation (Explanation) Connectors Location on the P board (TH-42PX80U) SC/SU/SD Board Isolation (Explanation) Power On Operation TH-42PX80U-TH50PX80U DRV Reset (6 Blinks) Power On Circuit Explanation... -
Page 5: Topics
Topics Models Line-up (46” PDP TV Introduction for 2008) HD Models/Full HD Models Standby Operation Power-on Operation Shutdown Detect Circuit Troubleshooting Signal Process Circuit Panel Drive Circuit Adjustments Service Notes Panasonic ideas for life... -
Page 6: Models Line-Up (46" Pdp Tv Introduction For 2008)
Models Line-up (46” PDP TV Introduction for 2008) Panasonic has introduced a 46” PDP TV for 2008 2008 Panasonic PDP TV Series (11 Generation) 42” 46” 50” 58” 65” TH-42PX80U TH-50PX80U (1 P Board) (1 P Board) TH-42PZ80U TH-46PZ80U TH-50PZ80U... -
Page 7: Models Comparison
2008 Models Comparison FULL HD TH-42PZ80U TH-42PZ85U TH-42PX80U Model TH-46PZ80U TH-46PZ85U TH-50PX80U TH-50PZ80U TH-50PZ85U 1,024 by 768 (42”) Resolution 1,920 by 1,080 1,920 by 1,080 1,366 by 768 (50”) PC Input D Board A Board Contrast Ratio 15,000:1 20,000:1 30,000:1... -
Page 8: Th-42Px80U Comparison To Last Year's Models
TH-42PX80U Comparison to Last Year’s Models The Models TH-42PX80U and TH-50PX80U do not have a D board. The circuits normally found in the D board on previous models, are now built into the A board. No D Board D Board... -
Page 9: Connectors Location (Th-42Px80U)
Connectors Location (TH-42PX80U) This slide shows the location of the connectors on all the boards Panasonic ideas for life... -
Page 10: Power Supply/Signal Process/Panel Drive Circuit
Power Supply/Signal Process/Panel Drive Circuit TH-42PX80U Panasonic ideas for life... - Page 11 TV via the bus line. It also provides protection by monitoring the supply voltages for abnormalities. Panel Drive Circuit: This circuit provides the control drive pulses to the drive circuit boards to drive the panel. Panasonic ideas for life...
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Page 12: Power Supply (Standby) Th-42Px80U-Th50Px80U
Power Supply (Standby) TH-42PX80U-TH50PX80U Panasonic ideas for life... -
Page 13: Standby Operation
The P board outputs the F+15V to pins 7, 8, and 9 of connector A7 in the A board. This voltage is applied to a regulator circuit that generates: SUB9V, SUB5V, and SUB3.V. If any of these voltages (F+15V, SUB9V, SUB5V, and SUB3.3V) are missing, the TV shuts down and the power LED blinks 10 times. Panasonic ideas for life... -
Page 14: Connectors Location On The P Board (Th-42Px80U)
Connectors Location on the P board (TH-42PX80U) This picture shows the location of the connectors on the P board Panasonic ideas for life... -
Page 15: Power On Operation Th-42Px80U-Th50Px80U
Power On Operation TH-42PX80U-TH50PX80U Panasonic ideas for life... -
Page 16: Power On Circuit Explanation
When the “Panel” CPU on the A board is energized, it outputs the “PANEL_MAIN_ON” Command (3.2V) to pin 11 of connector P25 on the P board. The PANEL MAIN ON command turns on the power supply circuit that outputs the Vsus, Vda, 15V, and Panasonic ideas for life... -
Page 17: Voltages Distribution (Th-42Px80U)
Voltages Distribution (TH-42PX80U) Panasonic ideas for life... - Page 18 Voltages Distribution (TH-42PX80U) Panasonic ideas for life...
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Page 19: Th-Xxpz80U And Th-Xxpz85U
Because of the similarities between the TH-XXPX80U, the TH-XXPZ80U, and TH-XXPZ85U, from this point forward, the material used in the guide is based on the TH-XXPZ85U. TH-XXPZ80U and TH-XXPZ85U Panasonic ideas for life... -
Page 20: Boards Name And Function (Th-Xxpz80U/Pz85U)
DC-DC Converter Digital Signal Processor, Microcomputer HDMI Interface, Peaks Lite 2, Full HD Scan Drive Front terminal, AV3, Key Switch Scan out (Upper) Remote receiver, Power LED Scan out (Lower) Power Switch Sustain Drive SD Card Slot HDMI3 in Panasonic ideas for life... -
Page 21: Board Layout
Board Layout Panasonic has been using single scan addressing in our standard definition (SD) Plasma TVs for a while now. In 2006 (9 generation), Panasonic started using single scan addressing in our 42” HD models. In 2007 (10 generation), the 50” HD models were added to the list of TV using single scan addressing. -
Page 22: Th-42Pz85U
TH-42PZ85U This is a picture of the TV with the rear cover removed Panasonic ideas for life... -
Page 23: Th-42Pz85U
In this line of Full HD Plasma TVs, the number of boards used have been reduced. Both the DG board and the H board are no longer used. The circuits found in these boards are now part of the A board. Panasonic ideas for life... -
Page 24: Th-42Pz85U Connectors Location
TH-42PZ85U Connectors Location This picture shows the location of all the connectors in the TV. Panasonic ideas for life... -
Page 25: Th-42Pz85U D Board And C Boards Location
TH-42PZ85U D Board and C Boards Location This picture shows the location of the D board and its connectors. Panasonic ideas for life... -
Page 26: Start-Up Process
Start-up Process Panasonic ideas for life... - Page 27 Start-up Process Upon connecting the Panasonic Plasma Display Television to the AC line, the sound of relays being triggered can be heard from the Power Supply board. Also a red light from the Optical jack on the back of the TV can be observed.
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Page 28: Start-Up Process Block Diagram
Start-up Process Block Diagram 3.3V Panasonic ideas for life... -
Page 29: Start Up Process Description
STB5V, is to activate the “SOS DETECT” circuit in the A board. The F+15V from connector P6 on the P board is applied to connector A6 in the A board. This voltage is applied to a regulator circuit that generates: SUB9V, SUB5V, and SUB3.V. Panasonic ideas for life... -
Page 30: Start Up Process Description
Start-up Process (Detailed Circuit) This is a detailed block diagram of the start up process Panasonic ideas for life... -
Page 31: Start-Up Process Explanation
The SUB5V and SUB9V from IC5400 and IC5401 are connected to the CPU for voltage presence detection. Any abnormalities of the SUB5V or SUB9V triggers the SOS circuit. The TV shuts down and the power LED blinks 10 times. This happens while the TV is off (Before turning on the power). Panasonic ideas for life... -
Page 32: Sub-Voltages Distribution Block Diagram
Sub-Voltages Distribution Panasonic ideas for life... - Page 33 The 5V, besides being used in the A board, is also distributed to the K and GH boards. • The 3.3V is used in the A board and it’s also provided to the GH and GS boards. • A 10 blinks code from the power LED indicates abnormalities on any of these voltages. Panasonic ideas for life...
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Page 34: Troubleshooting 10 Blinks Condition At Plug In (Schematic)
Troubleshooting 10 blinks Condition At Plug in Panasonic ideas for life... -
Page 35: Troubleshooting 10 Blinks Condition At Plug In
Disconnect connector A/52GS52 to isolate the GS board. Disconnect connector A11/GH11 to isolate the GH board. The defective board is found when the connector that provides the Sub-voltages to that board is removed and the TV no longer shuts down. Panasonic ideas for life... -
Page 36: Power On Operation
Power On Operation Panasonic ideas for life... -
Page 37: Power On Operation Block Diagram
Power On Operation 3.2V is needed to turn on the P board to generate Vsus, Vda, P15V, and P5V STEPS Panasonic ideas for life... -
Page 38: The Power On Circuit Explanation
The PANEL MAIN ON command turns on the power supply circuit that outputs the Vsus, Vda, 15V, and 5V. The POWER ON/OFF command turns on the Video/Panel Control and the Discharge Control circuits in the D board. Panasonic ideas for life... -
Page 39: Voltages Distribution
Voltages Distribution Panasonic ideas for life... -
Page 40: Troubleshooting 10 Blinks Condition Power On (Schematic)
Troubleshooting 10 blinks Condition At Power On Panasonic ideas for life... -
Page 41: Troubleshooting 10 Blinks Condition Power On
If the LEDs on the SS and SC boards are not lid, then isolate them one at time. If the SS and SC boards are OK, then the P board may be defective. Panasonic ideas for life... - Page 42 Circuit Operation When Connectors A6 and A7 are Removed Panasonic ideas for life...
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Page 43: Circuit Operation When A6 And A7 Are Removed
A board, the CPU is disabled 2.7V is needed to turn on the P board to generate just the F_STB15V The A, K, GH, and S board are disabled when A6 and A7 are disconnected IC9003 Panasonic ideas for life... -
Page 44: Circuit Operation When A6 And A7 Are Removed
The “Power On/Off” command (3.2) is connected to the Video/Panel Control and Discharge circuit to output the panel drive control pulses. This method of isolation is useful when troubleshooting problems where the A, GH, K, or S board are suspected to be defective. Panasonic ideas for life... -
Page 45: Picture Of Connector A6 And A7 Location
It may not be necessary to remove the metal plate in front of the input jacks when disconnecting connectors A6 and A7. To remove the metal plate in front of the input jacks, remove the 6 screws shown on Figure 1. Figure 1 Figure 2 Panasonic ideas for life... - Page 46 (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. Panasonic ideas for life...
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Page 47: Power Led Blinking Timing Chart
SC floating voltage SOS SC, SU, SD, D, P SS Energy recovery SOS SS, D, P Panel Configuration SOS Sub 5V SOS, Main 3.3V SOS, DTV9V SOS, Tuner SOS Sound SOS Communication Error with Peaks Lite-2 Panasonic ideas for life... -
Page 48: D Board Sos Detect
D board SOS Detect Panasonic ideas for life... -
Page 49: D Board Sos Detect (Explanation)
IC9805 is a 3.3V regulator located on the D board. Its output is monitored by IC9003. If the 3.3V is not present at pin 61, the CPU (IC9003) shuts down the unit. The power LED blinks 3 times. Panasonic ideas for life... - Page 50 During normal operation, pin 8 of connector SS33 outputs a low to pin 66. If the SS board becomes defective, a high is provided to pin 66. As a result, the unit shuts down and the power LED blinks 8 times. Panasonic ideas for life...
- Page 51 A defective D board may also be responsible for the 2, 3, 4, 5, 6, 7, 8, or 9 blinks of the power LED. A defective component on the D board may supply the MPU (IC9003) an erroneous input that causes the unit to shut down, with the power LED blinking a number of times. Panasonic ideas for life...
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Page 52: Blinks Error Code Block Diagram
2 Blinks Error Code These 3 conditions can cause the TV to shutdown and the power LED to blink 2 times Missing P15V A short of the P15V Wrong diagnostic by the D board P15V Distribution Panasonic ideas for life... -
Page 53: Troubleshooting 2 Blinks Error Code
1 of connector P7 and ground. The defective board is found when the connector that provides the P15V to that board is removed and the short circuit is no-longer present. Panasonic ideas for life... -
Page 54: Blinks Error Code Block Diagram
These 4 conditions can cause the TV to shutdown and the power LED to blink 2 times Missing P5V A short of the P5V A short of the Vda line (Note: missing Vda from the P board does not cause 5 blinks) Wrong diagnostic by the D board P5V and Vda Distribution Panasonic ideas for life... -
Page 55: Troubleshooting 5 Blinks Error Code
5 of connector P25 and ground. The defective board is found when the connector that provides the P15V to that board is removed and the short circuit is no-longer present. Panasonic ideas for life... -
Page 56: D16280(D280) Location (8 Blinks)
D16280(D280) Location (8 Blinks) PANEL N 2.7V SOS To pin 66 IC9003 TH-42PZ85U Anode D16280 (D280) Panasonic ideas for life... -
Page 57: Blinks Sos Detect Circuit
If the TV stays on, then the SS or the Panel is defective. • If the anode of D16280 (D280) is high (2.7V) at the time the unit shuts down, the Panel is defective. • If the anode is low, the SS board is defective. Panasonic ideas for life... -
Page 58: Sustain Drive Board (Ss) Isolation
Sustain Drive Board (SS) Isolation Caution: Do not let the TV run for more than 30 seconds while connectors or boards are disconnected. Panasonic ideas for life... -
Page 59: Sustain Drive (Ss) Board Isolation (Explanation)
8 and 10 of connector P12. Note 2: In order to get to SS33 and SS34, it might be necessary to remove the Side Terminal Unit assembly. Remove 3 screws to remove Side Terminal Unit assembly. Panasonic ideas for life... -
Page 60: Sc/Su/Sd Board Isolation (Explanation)
When this is done, the display is completely black (No picture) Caution: Do not let the TV run for more than 30 seconds while connectors or boards are disconnected. This procedure could be useful when troubleshooting 7 blinks problems. Panasonic ideas for life... -
Page 61: Drv Reset (6 Blinks)
DRV Reset (6 Blinks) Panasonic ideas for life... -
Page 62: Drive Reset Circuit Explanation
IC9003 as DVR RST. When the 5V SENSE circuit does not detect 5V from the C1 board and the C2 board, the DVR RST output becomes low. The unit goes into shutdown and the power LED blinks 6 times. Panasonic ideas for life... -
Page 63: Su/Sd Board Isolation (Pictorial)
SU/SD Board Isolation Caution: Pay close attention to the VF Ground Screws. Resistance between VF ground and Chassis ground should be in the Kilo-ohms range Panasonic ideas for life... -
Page 64: Sc/Su/Sd Board Isolation (Explanation)
SC/SU/SD Board Isolation (Explanation) Unlike previous models of Panasonic Plasma TVs, the 2008 models are designed not to turn-on if either the SU or SD board is disconnected. Disconnecting either causes the unit to shutdown and the power LED to blink 7 times. -
Page 65: Sc/Su/Sd Board Isolation (Block Diagram)
SU/SD Board Isolation (Block Diagram) Panasonic ideas for life... -
Page 66: Symptoms Caused By Defective Sd Boards
SC board (Follow proper SU/SD board isolation procedure). If the SD is defective, the screen will have a good picture at the top half of the screen and a completely black area in the lower half. Panasonic ideas for life... -
Page 67: Symptom Caused By Defective Su Board
If the SU is defective, the screen will have a good picture at the bottom half of the screen and a completely black area in the upper half. This is what normally a non shutdown problem caused by the SU board looks like Panasonic ideas for life... -
Page 68: A Board Sos Detect Block Diagram
A board SOS Detect Block Diagram If a fan is disconnected, place a jumper between pin 2 and pin 3 of the missing fan connector Panasonic ideas for life... -
Page 69: A Board Sos Detect (Explanation)
IC1100, triggering a SOS condition. The power LED blinks 12 times. A short circuit in the sound P15V normally shuts the TV down and the power LED blinks 2 times. It can also cause the TV to shutdown and make the power LED blink 12 times. Panasonic ideas for life... - Page 70 Digital Signal Processor Panasonic ideas for life...
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Page 71: Digital Signal Processor Block Diagram (Th-42Pz85U)
Digital Signal Processor Block Diagram (TH-42PZ85U) Panasonic ideas for life... -
Page 72: Digital Signal Processor Explanation (Th-42Pz85U)
Another benefit of the LVDS standard is minimal concern for cable length. The main MCU handles all video applications. It serves as the controller that monitors all operations of the TV section (not display) of the unit. Panasonic ideas for life... -
Page 73: Switching To 4:3 To Confirm Problem With The A Board
Switching to 4:3 to confirm problem with the A board Switching the Aspect to 4:3 can help confirm if the symptom is created by a defective A board. If the side bars are not affected by the symptom, the A board is defective. Panasonic ideas for life... -
Page 74: D Board (Format Converter/Plasma Ai Processor)
D Board (Format Converter/Plasma AI Processor) To C21 board To C12 board To C11 board Panasonic ideas for life... -
Page 75: Circuit Explanation
The P5V is monitored by the Main CPU (IC9003) for voltage drop condition. The STB5V is applied to a 3.3V regulator (IC9011). The 3.3V output by this IC is used as the supply source (VCC) by the Main CPU IC9003. Panasonic ideas for life... - Page 76 The sustain pulses are output to the SS board. The data drive signals are output to the C1 and C2 boards. The C1 board drives the right portion of the panel and the C2 board drives the left portion Panasonic ideas for life...
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Page 77: Pictures Of Symptoms Caused By The D Board
Pictures Of symptoms caused by the D board Panasonic ideas for life... - Page 78 Adjustments Panasonic ideas for life...
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Page 79: Service Mode
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - ) How to exit: Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control. Panasonic ideas for life... -
Page 80: Internal Test Patterns
Internal Test Patterns To access the internal patterns, select [AGING] from the main adjustment menu and press the [3] or [4] button of the remote control to select the desired pattern. Panasonic ideas for life... -
Page 81: Self Check
To Exit the Self-Check Mode, Press and hold the Power button on the TV for 5 seconds or disconnect the AC cord from the wall outlet. the TV for 5 seconds or disconnect the AC cord from the wall outlet. Panasonic ideas for life... -
Page 82: Check Point
Check Point Panasonic ideas for life... -
Page 83: Self Check Menu
Self Check Menu Panasonic ideas for life... -
Page 84: How To Reset
To reset the Press and hold the “VOLUME ( - )”button on the TV and press the “MENU” button on the remote control for more than 3 seconds. To Exit: Disconnect the AC cord from wall outlet. Panasonic ideas for life... -
Page 85: Software Upgrade
Data Transfer (TV to SD Card – SD Card To TV) How to Copy Self Check Data To SD Card Software Upgrade Picture Refresh Extension Cable Kit Panasonic ideas for life... -
Page 86: Data Copy To Sd Card
Data Copy To SD Card Panasonic ideas for life... -
Page 87: Data Copy To Sd Card
Data Copy To SD Card Panasonic ideas for life... -
Page 88: Data Copy From Sd Card To The Tv
Data Copy From SD Card to The TV Panasonic ideas for life... -
Page 89: How To Copy Self Check Data To Sd Card
How to Copy Self Check Data To SD Card Panasonic ideas for life... -
Page 90: How To Copy Self Check Data To Sd Card
How to Copy Self Check Data To SD Card Panasonic ideas for life... -
Page 91: Software Upgrade
Software Upgrade Panasonic ideas for life... - Page 92 Software Upgrade Panasonic ideas for life...
- Page 93 Software Upgrade Panasonic ideas for life...
- Page 94 Software Upgrade Panasonic ideas for life...
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Page 95: Picture Refresh
Picture Refresh Panasonic ideas for life... -
Page 96: Picture Refresh
Picture Refresh Panasonic ideas for life... -
Page 97: Extension Cable List
Extension Cable List Panasonic ideas for life... - Page 98 Extension Cable List Panasonic ideas for life...
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Page 99: Extension Cable Th-Xxpx80U (A Board) (P Board)
Extension Cable TH-XXPX80U (A Board) Panasonic ideas for life... - Page 100 Extension Cable TH-XXPX80U (A Board) Panasonic ideas for life...
- Page 101 Extension Cable TH-XXPX80U (P Board) Panasonic ideas for life...
- Page 102 Extension Cable TH-XXPX80U (P Board) Panasonic ideas for life...
- Page 103 Closing session Thank you! Panasonic ideas for life...