Panasonic TC-L42D2 Technical Manual
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Panasonic TC-L42D2 Technical Manual

2010-lcd hd/fhd tv (13th generation)
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See also: Service Manual
2010 LCD TV Technical Guide
2010-LCD HD/FHD TV (13
Applies to models:
TC-L42D2
TC-L37D2
TC-L42U25
TC-L37U22
TC-L32U22
TC-L37X2
TC-L32X2
TC-L22X2
TC-L37C22
TC-L32C22
Panasonic Service and Technology Company
Panasonic National Training
Title Page
th
Generation)
Slide # 1
TTG100618JM/100720

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Summary of Contents for Panasonic TC-L42D2

  • Page 1 2010 LCD TV Technical Guide Title Page 2010-LCD HD/FHD TV (13 Generation) Applies to models: TC-L42D2 TC-L37D2 TC-L42U25 TC-L37U22 TC-L32U22 TC-L37X2 TC-L32X2 TC-L22X2 TC-L37C22 TC-L32C22 Panasonic National Training Panasonic Service and Technology Company Slide # 1 TTG100618JM/100720...
  • Page 2 National Training "HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.“ Copyright © 2010 by Panasonic Service and Technology Company All rights reserved. Unauthorized copying and distribution is a violation of law.

  • Page 3: Table Of Contents

    Features SOS Detect (Shutdown) Panasonic LED Backlighting Techniques TC-L37U22 Power LED Diagnostic Codes LED Backlighting Techniques TC-L42D2 Power LED Diagnostic Codes 2010 D Series 1 Blink SOS Circuit 2010 U Series 3 and 7 Blinks SOS Circuit 2010 X Series...

  • Page 4: Topics

    Topics Features Start-up Operation A) Stand by Operation B) Power On Operation C) Voltage Distribution 3. SOS Detect 4. Signal process Circuit A) Video Signal B) Audio Signal 5. Service Notes A) Service Mode B) SRV-TOOL C) Self check D) SD card 6.

  • Page 5: Highlights

    Highlights IPS Panel The IPS panel in 2010 VIERA models is an LCD panel that provides beautiful viewing from virtually any angle. Colors appear uniform and consistent even when viewed from a wide angle, so images look fresh and natural no matter where you're sitting.
  • Page 6 Highlights LED Backlight Boasting a high luminous efficiency, the LED backlight helps deliver a brighter, more vivid picture while using less electricity. You enjoy the kind of bright, beautiful images that make VIERA such outstanding entertainment, while also saving energy. Intelligent Scene Controller Intelligent A.I.

  • Page 7: Features

    Features Main Differences between the 2010 model and 2009 model The different point of 37/32 inch 2010 models and 37/32 inch 2009 models are as follows: Audio processor, Micom, HDMI de-multiplexer and video signal processor are integrated to IC8001 Nile Tcon. IC4510 was eliminated.

  • Page 8: Panasonic Led Backlighting Techniques

    Panasonic’s top of the line VIERA LED-LCD D2 series features two 1080p Full HD models - TC-L37D2, a 37-inch class (37” measured diagonally) HDTV and the TC- L42D2, a 42-inch class (41.6”...

  • Page 9: Led Backlighting Techniques

    LED Backlighting Techniques LED Lights the Way to Better Images, Thinner TVs and Energy Savings. Introducing LED edge-lit technology to the VIERA® 2010 LCD model line-up. Edge lighting uses white LEDs arranged around the inside frame of the TV along with a special diffusion panel designed to spread the light evenly behind the LCD panel.

  • Page 10: 2010 D Series

    2010 D Series LED Backlight 120Hz Motion Picture Pro4 Wide Viewing Angle with IPS Alpha Panel VIERA Image Viewer™ (JPEG) TC-L42D2 ×3 TC-L37D2 High Picture Quality Smart Networking • VIERA Image Viewer™ (JPEG) • Full HD (1080P) • VIERA Link™...

  • Page 11: 2010 U Series

    2010 U Series Wide Viewing Angle with IPS Alpha Panel VIERA Image Viewer™ (JPEG) TC-L42U25, TC-L42U22 TC-L37U22 TC-L32U22 ×3 High Picture Quality Smart Networking • Full HD (1080P) • VIERA Image Viewer™ (JPEG) • 120Hz Motion Picture Pro4 (TC-L42U25 Only) •...

  • Page 12: 2010 X Series

    2010 X Series ® Universal Dock for iPod Included* VIERA Image Viewer™ (JPEG) VIERA Link™ ×3** TC-L37X2 TC-L22X2 TC-L32X2 High Picture Quality Smart Networking ® • HD (720P) • Universal Dock for iPod Included* • Wide Viewing Angle with IPS Alpha Panel*** •...

  • Page 13: 2010 C Series

    2010 C Series VIERA Image Viewer™ (JPEG) VIERA Link™ ×2** TC-L37C22 TC-L32C22 High Picture Quality Smart Networking • HD (720P) • Wide Viewing Angle with IPS Alpha Panel*** • VIERA Image Viewer™ (JPEG) • 18,000:1 Dynamic Contrast with Intelligent • VIERA Link™...

  • Page 14: Feature Comparison

    Feature Comparison TC-L42U22 TC-L37X2 TC-L42D2 TC-L37C22 FEATURES TC-L37U22 TC-L32X2 TC-L42U25 TC-L37D2 TC-L32C22 TC-L32U22 TC-L22X2 VIDEO Panel IPS 1080p (WSXGA) IPS 1080p (WSXGA) IPS 1080p (WSXGA) IPS (WXGA) IPS (WXGA) Backlight EEFL EEFL EEFL EEFL Contrast (Dynamic) 2,000,000:1 20,000:1 20,000:1 20,000:1...

  • Page 15: 2010 Series Description

    TC-L22X2 TC-L32U22 Panasonic’s LED-LCD D2 series features two 1080p Full HD models - TC-L37D2, a 37-inch class (37” measured diagonally) HDTV and the TC-L42D2, a 42-inch class (42.0" measured diagonally) HDTV. The D2 series introduces LED-backlight technology to the 2010 model line-up. LED-LCD uses white LEDs arranged around the inside frame of the TV along with a special diffusion panel designed to spread the light evenly behind the LCD panel.
  • Page 16 2010 Series Description Continued Panasonic’s TC-L42U25, a 42-inch class (42.0" measured diagonally) HDTV, is a 1080p Full HD Resolution HDTV whose features include 120 Hz Motion Picture Pro 4; 24p Smooth film; VIERA Image Viewer to view digital still JPEG images; VIERA Link; three HDMI connections and a PC input.

  • Page 17: Tc-L37U22 Board Layout

    TC-L37U22 Board Layout LVDS STB5V Sound15V DTV 12V A03 A22 SUB ON Inverter_ON INV_SOS Control Panel ASSY P１ To Speaker A04 A10 Power LED Remote RX Key scan Board Name Function A-Board Rear Terminal, AV Switch, MCU, Audio & Video Processor, LVDS, Tuner V-Board Remote Receiver, LED...

  • Page 18: Tc-L37D2 Board Layout

    TC-L37D2 Board Layout To LED backlight STB5V Sound15V CN01 CN02 F15V SUB ON Backlight ON LVDS Control CNAC Panel TC06 TC05 Assy A11 A04 A10 TC04 TC01 To Speaker Key scan To Panel Control Power LED, Remote receiver Slide # 18...

  • Page 19: Tc-L37D2 Board Layout

    TC-L37D2 Board Layout P BOARD A BOARD TC BOARD Board Name Function A-Board Speaker out, AV Terminal, HDMI in, SD Card, PC in, iPod Digital Signal Processor, Nile-Tcon, Tuner, Non Serviceable V-Board Remote Receiver, LED TC-Board T-CON, Non Serviceable P-Board Power (AC/DC), DC-DC Non serviceable P-Board should be exchanged for service.

  • Page 20: Tc-L37D2 P-Board Pictorial

    TC-L37D2 P-Board Pictorial Non serviceable LED POWER _DC OUPUT CONNECTOR _COMMAND_IN Power (AC/DC), DC-DC P-Board should be exchanged for service. AC INPUT Slide # 20...

  • Page 21: Tc-L37D2 A-Board Pictorial

    TC-L37D2 A-Board Pictorial CNA03 Non serviceable Nile-Tcon (System Control): Audio Input Terminal, Audio Processor, Audio Amplifier, LVDS Speaker out CONNECTOR Video Input Terminal, HDMI in, SD Card, PC in, iPod in, Component Input, Video Input, Tuner (TV Reception), Digital Signal Processor, LVDS Output A-Board should be exchanged for service.

  • Page 22: Tc-L37D2 Tc-Board Pictorial

    TC-L37D2 TC-Board Pictorial LVDS Receiver Timing Control The serialized data (LVDS) from the A-board is converted to parallel by the ZWEI2 IC. The TC06 TC05 data is then processed by the timing control IC (TCON) to convert the RGB data into serial streams for processing by the TCON drivers of the LCD panel.

  • Page 23: Standby Power_ All Except D2 Series

    Standby Power_ All except D2 Series When the TV is plugged in, AC voltage is applied to the standby circuit of the power supply circuit to produce STB5V. The STB 5V is provided to the A board via pin 1 of connector P2. The STB 5V enters the application specific integrated circuit (ASIC), IC4700, for conversion to STB3.3V.

  • Page 24: Standby Power_ D2 Series

    Standby Power_ D2 Series When the TV is plugged in, AC voltage is applied to the standby circuit of the power supply circuit to produce STB5V. The STB 5V is provided to the A board via pin 13 of connector A03. The STB 5V enters the application specific integrated circuit (ASIC), IC4700, for conversion to STB3.3V.

  • Page 25: Power-On Part 1_ All Except D2

    Power-on Part 1_ All Except D2 Slide # 25...
  • Page 26 Power-on Part 1_ All Except D2 When the power button of the TV or remote control is pressed, The MPU (IC8001) of the A board outputs the TV_SUB_ON command to turn on the transistors Q4770 and Q4771 which provide STB5V to the power relay. The STB5V enters the power supply board via pin 11 of connector P2.

  • Page 27: Power On Part 2_ All Series Except D2

    Power On Part 2_ All Series Except D2 Slide # 27...
  • Page 28 Power On Part 2_ All Series Except D2 After sending TV SUB On command, F15V and Sound 15V are supplied to A board. The F15V source also known as the DTV12V is supplied to DC/DC converters, IC5608, IC5606 IC5610 and Q5412. Provided by IC8001, the panel VCC-ON command turns on IC4800 to produce 13.7V and 2.5V for the operation of the TCON circuit located inside the LCD panel.

  • Page 29: Power-On Part 1_ D2 Series

    Power-on Part 1_ D2 Series The difference in this drawing is the pin numbers of connector A03. Slide # 29...

  • Page 30: Power On Part 2_ D2 Series

    Power On Part 2_ D2 series Slide # 30...
  • Page 31 Power On Part 2_ D2 series After sending TV SUB On command, F15V and Sound 15V are supplied to A board. The F15V source also known as the DTV12V is supplied to DC/DC converters, IC5608, IC5606 IC5610 and Q5412. Provided by IC8001, the panel VCC-ON command turns on the transistor Q5412 to supply 12V to the TC-Board.

  • Page 32: Cpu Commands Explanation

    CPU Commands Explanation ① TV SUB ON The SYSTEM MPU on the A board outputs the ① “TV SUB ON” command (3.2V) when the power TV SUB ON ② is turned on. This command is used to turn on IC8001 Backlight or Inverter ON Nile-TCON the circuit in the power supply that generates...
  • Page 33 TC-L32U22 Inverter Circuit and 1 Blink SOS Slide # 33...

  • Page 34: Inverter Circuit And 1 Blink Sos

    Inverter Circuit and 1 Blink SOS The INV_ON/OFF command (high) of the MPU, IC8001 of the A board, enters the P-Board to turn on the inverter circuit. The inverter circuit produces AC voltages that power the backlight fluorescent lamps . The output of the inverter, approximately 2Kvp-p is provided to the LCD panel via the connectors P5, P6, P7 and P8.

  • Page 35: Led Backlight Control

    LED Backlight Control Slide # 35...
  • Page 36 LED Backlight Control The inverter receives 174V from the SMPS. The 174V source is provided to the panel to power the LED. The Backlight_On command from pin 13 of connector P2 starts the inverter drive signals. The inverter control signal, PWM, is delivered by the TCON board at pin 15 of connector P2 to control the brightness of the LEDs.

  • Page 37: U And X Series Video Signal Process Circuit

    U and X Series Video Signal Process Circuit Digital (Serial data) TUNER TUNER Digital Digital Analog Analog LVDS HDMI Analog CN A22 IC8001 IC8001 VIDEO (Nile-TCON) (Nile-TCON) (All Models DATA Except Resize Resize D Series) IP conv. IP conv. Composite To LCD Signal S-Video...
  • Page 38 Signal Process Circuit Explanation The main function of the A board is to select and process one of the incoming video signals. Video inputs 1 and 2, Component Video Input, HDMI inputs 1, 2 and 3, JPEG data from the SD card slot, and the composite video output of the tuner are all connected to IC8001 for selection.

  • Page 39: D Series Video Signal Process Circuit

    D Series Video Signal Process Circuit Digital (Serial data) TC01 TC05 TUNER TUNER R Side Digital Digital Analog Analog LVDS HDMI Analog LVDS IC9201 IC9201 IC8001 IC8001 IC9006 IC9006 T-CON T-CON (Nile-TCON) (Nile-TCON) ZWEI2 ZWEI2 LVDS Resize Composite TC04 Resize IP conv.
  • Page 40 D Series Video Signal Process Circuit The main function of the A board is to select and process one of the incoming video signals. Video inputs 1 and 2, Component Video Input, HDMI inputs 1, 2 and 3, JPEG data from the SD card slot, and the composite video output of the tuner are all connected to IC8001 for selection.

  • Page 41: Troubleshooting Tcon Problems

    Troubleshooting TCON Problems Video Process (A-Board) defect: Video signals received by the video process circuits are handled on a frame-by-frame basis. It is almost impossible for the video process circuits to cause a symptom on a specific area of the screen. Failures on the video process board usually presents themselves as distortions, color level shifts, video level shifts or noise that affects the entire picture.
  • Page 42 Troubleshooting TCON Problems LCD Panel defect At times, symptoms of a defective panel may be mistakenly identified as a TCON failure. Beside a broken LCD glass, most panel symptom would appear in a particular section of the screen. The TCON provides pixel data to groups of row and column drive ICs located on the upper and side edges of the panel.
  • Page 43 Troubleshooting TCON Problems Continued TCON defect A failed TCON circuit can produce a symptom of no video or lines and patterns that usually occupy a sizeable portion of the screen. A “no video” condition caused by the TCON is a bit harder to determine since there are no indications on the screen to analyze.
  • Page 44 Troubleshooting TCON Problems Continued TCON defect A failed TCON circuit can produce a symptom of no video or lines and patterns that usually occupy a sizeable portion of the screen. A “no video” condition caused by the TCON is a bit harder to determine since there are no indications on the screen to analyze.
  • Page 45 Troubleshooting TCON Problems Continued Troubleshooting a dead TCON board When the TCON board completely fails, data communication data between IC8001 and the TCON IC will come to an end. The television will shut down and the power LED will blink 9 times, indicating the failure of the TCON.

  • Page 46: Audio Process Circuit

    Audio Process Circuit All the audio signals’ selection and processing are performed by the Main CPU/Signal Processor IC (IC8001). The digital audio signal from IC8001 is output to the optical audio output jack as PCM/Dolby Digital. Serial data is output to the audio amplifier IC (IC2106). The output of IC2106 is connected to the speakers.

  • Page 47: Sos Detect (Shutdown)

    SOS Detect (Shutdown) Slide # 47...

  • Page 48: Tc-L37U22 Power Led Diagnostic Codes

    TC-L37U22 Power LED Diagnostic Codes When an abnormality is detected, the protection circuit resets the unit to the standby mode. The (A) board microprocessor causes the power LED to blink a number of times. The number of blinks points to the board where the abnormality is detected. Blinking times Contents BOARD...

  • Page 49: Tc-L42D2 Power Led Diagnostic Codes

    TC-L42D2 Power LED Diagnostic Codes When an abnormality is detected, the protection circuit resets the unit to the standby mode. The (A) board microprocessor causes the power LED to blink a number of times. The number of blinks points to the board where the abnormality is detected.
  • Page 50 TC-L32U22_1 Blink SOS Circuit Slide # 50...

  • Page 51: Blink Sos Circuit

    1 Blink SOS Circuit When the power button is pushed , IC8001 outputs the TVSUB ON command to turn on the main power supply and output the power_on voltages. Upon confirmation of the output voltages of the power supply, IC8001 sends the Inverter_ON command to P board. On the power supply board, the Inverter_On command enters IC7800, the inverter control IC.
  • Page 52 1 Blink SOS Troubleshooting Start Is the Inverter_on Is there DTV12V command (3V) at at pin 4 of CN P2 before the P board pin 3 of CN A03 before the TV shuts down? TV shuts down? Without DTV12V, the inverter circuit does not work Does pin 4 of A board...

  • Page 53: And 7 Blinks Sos Circuit

    3 and 7 Blinks SOS Circuit Slide # 53...
  • Page 54 3 and 7 Blinks SOS Circuit The A Board is responsible for the regulation, distribution and dissemination of all secondary voltages derived from the DTV12V output of the P Board. When the unit is powered, the 12V output of the P board biases the transistor Q5613 into operation, causing its collector to become “low”.

  • Page 55: Blinks Sos Circuit Troubleshooting

    3 Blinks SOS Circuit Troubleshooting The 13.7V and 2.5V are converted from the DTV12V source on the A board. They are then supplied to the LCD panel to power the drive circuit. Start Is pin 4 of Is there 12V at pin 4 of P board CN P2 CN P2 before the TV...

  • Page 56: Blinks Sos Circuit

    7 Blinks SOS Circuit The 17V and SUB3.3V sources are used to power the audio amplifier, IC2106. If IC2106 becomes defective, either the 17V or 3.3V line will be affected. The 3.3V is directly monitored by IC8001. In the event of a short, IC8001 shuts down the unit and the power LED blinks 7 times. Start Is pin 4 of Is there 12V at pin 4 of...

  • Page 57: Blinks Sos Circuit

    4 Blinks SOS Circuit When the unit is turned on, the DTV source of the P board is provided to the A board for conversion into other voltages. A zener diode at the base of transistor Q5613 protects against over-current condition. When the DTV12V source drops to a predetermined level, the zener diode turns off causing Q5613 to turn off and Q5612 to turn on.
  • Page 58 4 Blinks SOS Troubleshooting Start Is pin 4 of Is there 12V at pin 4 P board CN P2 of CN P2 before the shorted? TV shuts down? DTV 12V supply problem. Disconnect the connector A03. A board Is pin 4 of A board CN P2 shorted?
  • Page 59 iPod SOS Circuit _ No Blink Code The normal state of the iPod SOS input to IC8001 is low. This is achieved by applying the 5V output of IC3201 to the base of transistor Q3208. If the 5V source is missing or shorted, the transistor Q3208 turns off and its collector goes high to alert IC8001.
  • Page 60 9 Blinks SOS Circuit On the A board, the MPU (IC8001) monitors the operation of the audio power amplifier IC2106. If IC2106 or one of the speakers develops a short circuit, a high is output to IC8001 to trigger a shutdown and 9 blinks of the power LED.
  • Page 61 9 Blinks SOS Circuit TC05 In the event the unit shuts down and the power LED blinks nine times, check for an improper connection of connector A21/TC05. The shutdown occurs due to no communication between the TC-Board and A-Board. A defective TCON board may also be the cause for the blink code.

  • Page 62: Service Mode

    Service Mode How to enter the Service Mode While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds. Software Version Main Item Sub Item Data Peaks SOFT 0.150 SERVICE Press...

  • Page 63: Service Mode Menu (D2 Series)

    Service Mode Menu (D2 Series) Software Version SERVICE ADJUST Picture Adjustment WB-ADJ White Balance Adjustment OPTION Option Setting AGING Aging SRV-TOOL Service Tool This aging mode only exists in the D2 series. It can be useful to determine the section of the unit that is responsible for a distorted picture AGING 1.

  • Page 64: D Series Measurements And Adjustments

    D Series Measurements and Adjustments VCOM Adjustment (Flicker Adjustment) General information: After replacing the LCD panel, TC board (T-CON) or both, the [VCOM] Adjustment has to be done. Data for VCOM Adjustment is different depending on the LCD panel and the data stored in the TC board. Adjustment procedures are as follows.

  • Page 65: How To Enter The Service Mode_Srv-Tool

    How to Enter the Service Mode_SRV-TOOL How to access 1. Select [SRV-TOOL] in Service Mode. 2. Press [OK] button on the remote control. Display of SOS (Shutdown) History SOS History (Number of LED blinks ) indication. From the left side; Last SOS, before Last, two occurrences before last, 2nd occurrence after shipment, 1st occurrence after shipment.

  • Page 66: How To Enter The Self-Check Mode

    TEMP SENSOR A Board SYSMPU IC2106 AUDIO AMP A Board EPOP EDID: ** ** ** ** Copyright Panasonic Corporation 2010 SYSMPU IC8001 SYSMPU (Nile- A Board TCON Panasonic NG_ Indicates a defective part. When NG is displayed, replace the (A) board.

  • Page 67: Troubleshooting Picture Problems (All Series Except D)

    Troubleshooting Picture Problems Troubleshooting Picture Problems (All Series except D) (All Series except D) Slide # 67...
  • Page 68 Picture Defect (1) (1)Part of the screen Trouble Where is Upper the abnormal picture displayed ? Panel Upper or Lower Lower Panel Right Panel Left or Right Left Panel Vertical or Horizontal line Panel (2)All over the screen Abnormal color Many vertical lines OSD trouble All over the screen...
  • Page 69 Picture Defect (2) <Actual Symptom> <Symptom>Upper or Lower Defect Symptom: Upper trouble Abnormality means No Picture, Picture noise, abnormal picture, Full Horizontal line etc. <NG Area> Panel Drive Panel Drive Ａ Panel Tuner Drive Panel Input Drive Terminal Panel Drive Signal Processor LCD panel...
  • Page 70 Picture Defect (3) <Actual Symptom> <Symptom>Left or Right half defect Symptom: Right half picture trouble No Picture, Picture noise, Full Horizontal line, etc. <NG Area> Panel Drive Panel Drive Ａ Panel Tuner Drive Panel Input Drive Terminal Panel Signal Drive Processor LCD panel <Defective parts>...
  • Page 71 Picture Defect (4) <Actual Symptom> <Symptom>Horizontal line Symptom: Horizontal line <NG Area> Panel Drive Panel Drive Ａ Panel Tuner Drive Panel Input Drive Terminal Panel Drive Signal Processor LCD panel <Defective parts> Panel Slide # 71...
  • Page 72 Picture Defect (5) <Actual Symptom> <Symptom>Vertical line Symptom: Thin vertical line <NG Area> Ａ Panel Drive Panel Drive Panel Tuner Drive Panel Input Drive Terminal Panel Drive Signal Processor LCD panel <Defective parts> Panel Slide # 72...
  • Page 73 Picture Defect (6) <Actual Symptom> <Symptom>Vertical line noise Symptom: Vertical noise <NG Area> Ａ Panel Drive Panel Drive Panel Tuner Drive Panel Input Vertical noise Drive Terminal Panel Drive Signal Processor LCD panel <Defective parts> Panel or A board Slide # 73...
  • Page 74 Picture Defect (7) <Actual Symptom> <Actual Symptom> <Symptom>Sub picture NG Symptom: Sub picture NG <NG Area> Panel Drive Panel Drive Ａ Panel Tuner Drive Panel Input Drive Terminal Panel Drive Signal Processor LCD panel <Defective parts> A board Slide # 74...
  • Page 75 Picture Defect (8) <Actual Symptom> <Symptom>Non uniformity color Symptom: Irregular color <NG Area> Ａ Panel Drive Panel Drive Panel Tuner Drive Panel Input Drive Terminal Panel Drive Signal Processor LCD panel <Defective parts> Panel Slide # 75...
  • Page 76 Picture Defect (9) <Actual Symptom> <Symptom>Vertical lines all over screen Symptom: Vertical line all over screen <NG Area> Ａ Panel Drive Panel Drive Panel Tuner Drive Panel Input Drive Terminal Panel Drive Signal Processor LCD panel <Defective parts> Mainly A board, in some cases panel Slide # 76...
  • Page 77 Picture Defect (10) <Actual Symptom> <Actual Symptom> <Symptom>O.S.D. trouble Symptom: OSD trouble (Color is normal) <NG Area> Ａ Panel Drive Panel Drive Panel Tuner Drive Panel Input Drive Terminal Panel Drive Signal Processor LCD panel O.S.D. Mixture <Defective parts> A board Slide # 77...
  • Page 78 Picture Defect (11) <Actual Symptom> <Actual Symptom> <Actual Symptom> <Symptom>Abnormal color Symptom: Abnormal color <NG Area> Ａ Panel Drive Panel Drive Panel Tuner Drive Panel Input Drive Terminal Panel Drive Signal Processor LCD panel <Defective parts> A board Slide # 78...
  • Page 79 Picture Defect (12) <Actual Symptom> <Symptom>No Picture with Normal Sound No Picture and Normal Sound Reason: A board or Panel <NG Area> All A board Is picture from Analog TV Tuner area all input sources Picture is NG Panel Drive Panel Drive Ａ...
  • Page 80 Troubleshooting Picture problem Troubleshooting Picture problem (D Series) (D Series) Slide # 80...
  • Page 81 Picture Defect (1) (D Series) Conclusion: Exchange the Panel Sample Picture LVDS DATA Abnormal area Control DATA Source Driver TC board Gate Driver LVDS DATA A board LCD Panel (Gate Driver is in Panel) (LVDS= Low Voltage Differential Signaling) Diagnosis The Gate driver is defective.
  • Page 82 Picture Defect (2) (D Series) Conclusion: Exchange the Panel Sample Picture LVDS DATA Abnormal area Control DATA Source Driver TC board Gate Driver LVDS DATA A board LCD Panel (Gate Driver is in Panel) (LVDS= Low Voltage Differential Signaling) Diagnosis In this case, vertical half of the screen has trouble.
  • Page 83 Picture Defect (3) (D Series) Sample Picture Conclusion: Exchange the Panel Abnormal line LVDS DATA Control DATA Source Driver TC board Gate Abnormal bar Driver LVDS DATA A board LCD Panel (Gate Driver is in Panel) (LVDS= Low Voltage Differential Signaling) Diagnosis In this case , small vertical line problem is LCD panel defect.
  • Page 84 Picture Defect (4) (D Series) Conclusion: Exchange the Panel Sample Picture Abnormal lines LVDS DATA Control DATA Source Driver TC board Gate Abnormal line Driver LVDS DATA A board LCD Panel (Gate Driver is in Panel) (LVDS= Low Voltage Differential Signaling) Diagnosis In this case , a small horizontal line problem is the LCD panel defect.
  • Page 85 Picture Defect (5) (D Series) Conclusion: Exchange the Panel Sample Picture Abnormal area LVDS DATA Control DATA Source Driver TC board Gate Abnormal area Driver LVDS DATA A board LCD Panel (Gate Driver is in Panel) (LVDS= Low Voltage Differential Signaling) Diagnosis In this case, the screen color uniformity is abnormal.
  • Page 86 Picture Defect (6) (D Series) Conclusion: Exchange the A board or TC board Sample Picture many vertical lines LVDS DATA Control DATA Source Driver TC board Gate Driver LVDS DATA many vertical lines A board LCD Panel (Gate Driver is in Panel) (LVDS= Low Voltage Differential Signaling) Diagnosis In this case , many vertical lines all over screen may be caused...
  • Page 87 Picture Defect (7) (D Series) Conclusion: Exchange the A board Sample Picture Abnormal OSD LVDS DATA Control DATA Source Driver TC board Gate Driver LVDS DATA A board LCD Panel (Gate Driver is in Panel) (LVDS= Low Voltage Differential Signaling) Diagnosis OSD (On Screen Display) is generated at IC8001 Nile-TCON in A board.
  • Page 88 Picture Defect (8) (D Series) Conclusion: Exchange the A board Sample Picture Strange color LVDS DATA Control DATA Source Driver TC board Gate Strange color part Driver LVDS DATA A board LCD Panel (Gate Driver is in Panel) (LVDS= Low Voltage Differential Signaling) Diagnosis Strange color or discolor is A board defect, mainly IC8001 Nile-TCON.

  • Page 89: Sound Defect

    Sound Defect <Symptom> Sound Distortion A board Is sound Analog TV Ａ Tuner area from all input sources sound is NG Speaker Tuner Digital Digital TV Demodulator sound is NG area Input Opt Audio Terminal HDMI HDMI Decoder area sound is NG Signal Processor Head Phone...

  • Page 90: Panel Free Run Mode

    Panel Free Run Mode When a picture problem is encountered, the internal test pattern generator may be used to determine whether the symptom is the result of defective A board or the panel. The test pattern is displayed as follows: All video sources contain distortion Start the Panel...

  • Page 91: Data Copy By Sd Card

    EEPROM data to the A board. Panasonic B) Hotel (Copy the data when installing a number of units in hotel or any facility): When installing a number of units in a hotel or any facility, the data in the master TV can be copied to a SD card and then copied to other TVs.

  • Page 92: Data Copy Preparation

    Data Copy Preparation The SD card requires a startup text file with a “.pwd” extension for copying to the SD card when replacing the A board or installing a number of units in a hotel. Insert an empty SD card to your PC. Right-click a blank area in the SD card window, point to New, and then click text document.

  • Page 93: Data Copy From The Tv To Sd Card

    Hotel Input Password -------- An On-screen display associated with the startup file will appear automatically. Panasonic 3. Input the following password for (a) or (b) by using the remote control. Data Copy (Board Replacement) (a) For Board replacement : 2770...

  • Page 94: Data Copy From The Sd Card To Tv

    Input Password ------- using the remote control. 4851 (a) For Board replacement : 2771 Panasonic (b) For Hotel : 4851 Data will be copied from the SD card to the TV. Performing Data Copy (Board Replacement) 4. After the completion of copying to SD card, Copy SD to TV Card remove SD card from the TV set.

  • Page 95: Glossary

    Glossary 120Hz Motion Picture Pro4 Even fast-moving scenes are displayed sharply and clearly. With a 60Hz video signal input, 120Hz Motion Picture Pro4 makes 120 frames/second from 60 frames/second. This increases the frame count to allow natural frame-to- frame transitions, for smooth motion images with high resolution. Motion Focus Technology also reduces flicker and effectively suppresses blurring and afterimages.
  • Page 96 Glossary IPS Liquid Crystal Panel IPS liquid crystal is an abbreviated expression for In-Plane-Switching type TFT crystal, and is a high quality crystal mode that "is beautiful even when viewed at an angle." With IPS, the liquid crystal molecules rotate on a plane parallel to the TFT board by a horizontal electrical field, and therefore in principle, it offers superior viewing angle, color reproduction, and halftone response speed, has little variation in color tone according to the viewing direction and is capable of displaying a natural image.
  • Page 97 Glossary Wide Viewing Angle The wide 178° viewing angle ensures clear images even when viewed from an angle. The backlight's wide transmission aperture enhances the contrast between light and dark, and improves motion-image response. Slide # 97...

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