Service Seminar(Circuit Explanation of LCD for Europe/CIS)Model : TX-32/26/23LXD60 (for UK) TX-32/26/23LX60F (for West Europe) TX-32/26/23LX60P (for East Europe & CIS)

DATE : Nov 13-14, 2006 CS Promotion Center PanasonicAVCNetworks Company

1.Hello, every one.2.Im Takenori Shukuin in charge of instructor for TV products.3.I would like to hold seminar for LCD.4.About Model No. LCDs are TC-32/26/23LXD60,LX60F/P.5.Are you ready?

Contents

1. LCD Line-up for Y2006 2. Chassis Structure 3. Explanation for Signal Circuit 4. Explanation for Power Supply Circuit 5. Troubleshooting

This page is the seminars contents of Review of E-Seminar. 1. LCD Line-up for Y2006 2. Chassis Structure 3. Explanation for Signal Circuit 4. Explanation for Power Supply Circuit 5. Troubleshooting

Contents

1. Typical Trouble Example 2. The Idea of Diagnosis for LCD 3. Introduction of Jig

This page is the seminars contents of Hands on for LCD. 1. Typical Trouble Example 2. The Idea of Diagnosis for LCD 3. Introduction of Jig

1. LCD Line-up for Y2006

I explain about LCD Line-up for Y2006.

1-1. LCD Line-up for Y2006 (Continental/ CIS) 2005200632LX50F/P26LX50F/P23LX50F/PTX-23LX60F/PSTEP UPLEADER32LX500F/P26LX500F/PTX-32LX600F/PTX-26LX600F/PTX-32LX6F/PTX-26LX6F/P32LX52F26LX52FTX-32LX60F/PTX-26LX60F/PF: West Europe P: East Europe/CIS

1.In Europe and CIS market, LX600F/P is sold as a step-up model. 2.LX50 leader model changes LX60F/P. The leader models dont have digital tuner.3.And, LX6F/P is the derivative Model.

1-2. Product Summary

PanelSD cardPC inputGC4 (32/26)32/26/23LXD50LX50F/PMicronas VCTP *32/26/23LXD60LX60F/PScreen SizeCompact designHDMIVideo ProcessorIDTVVA panel2 (w/HDAVI Control)Yes (LXD only)PATPATMulti WindowSRS SurroundVCTP *Video-Controller-Text ProgressivePAT *Picture and TextMicronas VSP(23)Yes

1.This table shows the summary of current LX50 and new LX60. 2.LX60 has the following 4 new functions.3.New video processor called VCTP is introduced.4.2 HDMI terminals are newly introduced.5.HDAVI control is introduced.6.Slim and compact design.7.And, all models don't have SD card slot, PC input, SRS surround system as LX50.

2. Chassis Structure

I explain about chassis structure.

2-1. Location of PC board Current LXD50 LX50F/PDifferences from LX50:

1. The function of DG and H board are combined to A board. 2. The location of P and K board is changed. 3. The location of AV3 terminal is changed from G board to H board. 4. Two HDMI terminals are newly introduced in A board.

InverterPASPXV(*)New LXD60 LX60F/PHSPV(HDMI)K

InverterPAPHGDGSP

KVSPXV(*)KB* Note: LXD only.KEY Control

1.I explain about the difference of PCB layout between LX50 and LX60.2.There are 4 different points from LX50.3.1st, DG and H board are included to A board. 4.2nd, the location of P and K board is changed.5.3rd, the location of AV3 terminal is changed from G board to H board.6.4th, 2 HDMI terminals are newly introduced in A board.7.In addition, XV board is introduced for only LXD.

2-2. Function of PC board

Board NameFunctionLXD60LX60F/PAMAIN (Signal Processor, HDMI)YesYesBTunerYesYesHAV3 Terminal, HeadphoneYesYesKey ControlKey ControlYesYesKAC Input, Power SWYesYesPPower SupplyYesYesVRemote Receiver, LEDYesYesXVIDTV Processor (Board Change Only)Yes

1.This page shows PCB function.2.In this table, please note about the board name and the kind of installed board for each model.3.XV Board in LXD 60 has the function of digital tuner, but LX60F/P doesnt have the one.4.In addition, please note XV board is Board Change Only.

3. Explanation for Signal Circuit

I explain about signal circuit.

3-1. Differences from Current models

LVDSVCTPHDMI x2(CEC)AHDGAUDIOSWITCHGC4PROGC4LVIDEOSWITCHMPUSOUNDCONTROLAUDIOSWITCHDifferences from LX50:

1. The function of H and DG board is merged into A board. 2. VCTP is introduced instead of VIDEO SW, SOUND CONTROL, MPU, GC4PRO, GC4L and LVDS as shown in yellow color. 3. LX60 models have 2 HDMI terminals. 4. CEC circuit for HDAVI Control is added on A board.Current LXD50 LX50F/PNew LXD60 LX60F/P

1.I explain about the difference of circuit between LX50 and LX60.2.There are 4 different points from LX50.3.1st, the function of H and DG board is merged into A board. 4.2nd, VCTP is introduced instead of VIDEO SW, SOUND CONTROL, MPU, GC4PRO, GC4L and LVDS as shown in yellow color.5.3rd, LX60 models have 2 HDMI terminals.6.4th, CEC circuit for HDAVI Control is added on A board.

3-2-1. Video Signal Flow (LXD60)

HAV3COMPONENTHDMI1HDMI2XVA

VIDEOPROCESSOROSDDigitalOSDVIDEOSWITCHLVDS (*)VCTPIC1501LVDS(*) LVDS : Low Voltage Differential SignalingLCDPanelCVBSBTUNER

VIDEO SWTICHIC3200AV2

RGB SWTICHIC3400

VIDEO SWTICHIC3201AV1HDMI I/FIC5003DVB TUNERRGBCVBSAnalogDigital

1.This is the block diagram of video signal flow of LXD60.2.Blue line is Digital signal flow and black line is Analog signal flow .3.Analog signals are going from DVB tuner, tuner, AV1, AV2,Component & AV3 into VCTP.4.Digital signal is also going VCTP from HDMI terminal into VCTP.5.VCTP mainly has 3 functions.6.1st,it selects an input video signal.7.2nd, it mix OSD with the signal.8.3rd, it processes the signal with OSD, change it to LVDS signal and gives LVDS signal to LCD.9.IC3400 selects the video signal from DVB tuner or AV2 terminal.10.IC3200 or IC3201 selects the video signal from DVB tuner or VCTPs VIDEO SW.

3-2-2. Video Signal Flow (LX60F/P)

HAV3COMPONENTHDMI1HDMI2A

VIDEOPROCESSOROSDDigitalOSDVIDEOSWITCHLVDSVCTPIC1501LVDSLCDPanelBTUNERAV2AV1HDMI I/FIC5003CVBSAnalogDigital

1.This video signal flow is LX60F/P.2.The difference between LXD60 & LX60F/P is XV board.3.But, the video signal flow is almost the same as LXD60.

3-3-1. Audio Signal Flow (LXD60)

HAV3AUDIOSWITCHIC3300Head PhoneHPAMPIC270LRHDMI1HDMI2AXVBL/RAMAudio InD/AIC1380AMPIC1381 VCTPAV1TUNERDVB TUNERSIFL/RL/RL/RHDMI I/FIC5003L/RAudio AMPIC252AV2AnalogDigital AudioAMPIC251IC1501MSPL/RL/RL/RSWAV2 outAV1 out

1.This is the block diagram of audio signal flow of LXD60.2.Blue line is Digital signal flow and black line is Analog signal flow .3.Some analog signals are going from Tuner, AV1, AV2 & AV3 into VCTP.4.The other analog signals are going from Tuner, DVB Tuner, Audio in into AUDIO SW IC(IC3300).5.Digital signal is going from HDMI terminal into AUDIO SW IC.6.VCTP has the function of MSP (Multiple Sound Processor). MSP outputs L/R signal to Amplifiers for speakers and headphone.

3-3-2. Audio Signal Flow (LX60F/P)

HAV3AUDIOSWITCHIC3300Head PhoneHPAMPIC270LRHDMI1HDMI2ABAMAudio InD/AIC1380AMPIC1381AV1TUNERSIFL/RL/RL/RHDMI I/FIC5003L/RAudio AMPIC252AV2AudioAMPIC251L/RL/R VCTPIC1501MSPL/RSWAV2 outAV1 out

1.The audio signal flow is LX60F/P.2.Blue line is Digital signal flow and black line is Analog signal flow .3.The difference between LXD60 & LX60F/P is XV board.4.But, the audio signal flow is almost the same as LXD60.

4. Explanation for Power Supply Circuit

I explain about power supply circuit.

4-1-1. Power Supply Outline (LXD60)

AINVERTER24VLCD Panel5VA21.8V

IC5003(HDMI)3.3VIC5001,2 (EEPROM)5VIC251,IC252 (Audio AMP)AUD 24V24V24VP2RelayK1T80112V22P3A722Power SW K411212020211~41D801P31K3133PVSUPAU 8VA8VV2STB_3.3VSTB3.3VSTB1.8V

IC1501(VCTP)VSUPSIF 5V66RESETIC1500STB3.3V33VB112BA1124TUNER 5V4PANEL 5VQ873Q872NOT_STBYAUD12V5V33V8VIC38508VIC8663.3V3.3V1.8VIC50001.8VLCF5V5VLCFA43INV_ONINV_OFFQ952IC1120 (EEPROM)Q1217IC8855VIC1380 (DAC)IC3400 (RGB SW)5V5VIC1220 (SW)STB3.3VLCFQ875Q877Q1701Q1700Panel_ONXV01A1111,51-53IRD 9VIRD_5VIC38305V14,54,57IRD 5VXV14,54,5711,51,53IC3300 (Audio SW)IRD 9VIC3200,1 (Video SW)IRD 9VIC270 (HP AMP)8VIC1381 (OP AMP)8VLCFIRD 24V1.8VIC881IC862STB_1.8VSTB_3.3VIRD_PSU_ONINV_PSU_ONIC1200Q3800Q1200Q8813.3V23PC80223IRD_PSU_ONIC801IC38009V*9*98,108,10* 32/26 : No.11,12 23 : No.6,7RRLine FilterLF802LF803

1.This is Power Supply Outline of LXD60.2.P board outputs 24V and 12V to A board.3.In A board, IRD24V is converted to STB3.3V, STB1.8V. And, IRD9V & AUD12V is converted to 5V, 33V, and 8V.

4-2-1. Power Supply Outline (LX60F/P)

AA21.8V3.3VIC5001,2 (EEPROM)5VIC251,IC252 (Audio AMP)AUD 24V24V24VP2RelayK1T80112V22P3A722Power SW K411212020211~41D801Line FilterLF802LF803P31K3133PVSUPAU 8VA8VV2STB_3.3VSTB3.3VSTB1.8V

IC1501(VCTP)VSUPSIF 5V66RESETIC1500STB3.3V33VB112BA1124TUNER 5V4PANEL 5VQ873Q872NOT_STBYAUD12V5V33V8VIC38508VIC8663.3V3.3V1.8VIC50001.8VLCF5VLCFA43INV_OFFQ952IC1120 (EEPROM)IC8855VIC1380 (DAC)5V5VIC1220 (SW)STB3.3VLCFQ875Q877Q1701Q1700Panel_ON23PC80223IC801IC3300 (Audio SW)8VIC270 (HP AMP)8VIC1381 (OP AMP)8VIRD 24V1.8VIC881IC862Q8813.3VNOT_STBY

IC5003(HDMI)INVERTER24VLCD Panel5VINV_ON*9*98,108,10* 32/26 : No.11,12 23 : No.6,7Q1217RRSTB_1.8VSTB_3.3VINV_PSU_ON

1.This is Power Supply Outline of LX60F/P.2.P board outputs 24V and 12V to A board.3.In A board, IRD24V is converted to STB3.3V, STB1.8V. And, IRD9V & AUD12V is converted to 5V, 33V, and 8V.4.There are 3 differences from LXD60.5.1st, No IRD 9V and IRD 5V because LX60F/P doesn't have XV board.6.2nd, Audio SW (IC3300) is operated by 8V.7.3rd, NOT_STBY is used instead of IRD_PSU_ON.

4-3. LCD Panel Drive

A- BOARDVCTPIC1501BackLight_PWMA2PWM _OUTLevel Transfer(Q1721)Panel 5VLCD Panel Unit(Not Repairable, Unit change Only)Panel Controller

LCD GlassesHorizontalGate DriverVerticalSource DriverBack LightsInverterBoard24VA45VIC885LVDS 4chLVDS CLK3526272829167Transformer24VP91Inverter_OFF (L:ON)P3301234

Q1701Q1702

Q952(INV)Inverter_ON (H:ON)

1.This is a diagram of LCD panel interface.2.VCTP converts video data to LVDS and outputs it to panel controller.3.LCD panel is operated by 24V and 5V. 4.VCTP outputs Inverter_OFF signal and the signal is inverted by Q952. Inverter board works by it.5. BackLight_PWM signal output by VCTP passes Level transfer and controls LCD backlights.

5. Explanation for Protection Circuit

I explain about protection circuit.Protection Circuit prevents damages by over-voltage or by short-circuiting.

5-1. Protection Trouble CasesLED Blinking signalOnce

LightNo LightNo.7 L:SOSDOWN : 8V, 5V, 33V, 3.3VOvervoltage : 8V, 5V, STB 3.3VContentsBlinkingTimesblinkCheck Point (Example)P boardA boardB boardVCTPsPin No.When detecting irregular voltage, the circuit goes to stand-by mode to prevent damages by over voltage or short circuit. The power LED starts blinking as below.

1.This shows Power LED situation and the condition in the case of power trouble.2.There is only one situation.3.When 8V or 5V or 33V or 3.3V becomes down, or 8V or 5V or STB 3.3V becomes over-voltage, the voltage of 7pin of VCTP becomes low. And, TV set changes standby mode and Power LED starts blinking.4.In this situation, you judge the defective board is probably P, A or B board.

5-2. LED BlinkLED Blink

7PROTECT(L:SOS)IC1501VCTPLStandby mode(LED blinking)STB 3.3VD3862IC86233VAUD12VQ3861Q3862STB 3.3VLHONONLQ3860HOND3867IC3850D38658V8VIC8855VD38665VD3863D3864Q875AIC8663.3VD38713.3VDOWN : 8V, 5V, 33V, 3.3VOver Voltage : 8V, 5V, STB3.3V3.3VQ873IRD 24V12VRRP

1.This chart shows the operation of the protection circuit in A board.2.Each D3862, D3864 and D3863 detect over-voltage of STB3.3V, 8V and 5V.3.Each D3865, D3866, D3871 and D3867 detect short-circuiting of 8V, 5V, 3.3V and 33V.4.When one of these voltages becomes over-voltage, the base voltage of Q3862 becomes high.5.And, when one of the other voltages becomes short-circuiting, the base voltage of Q3861 becomes low.6.Then, Q3860 is turned on and PROTECT signal of 7pin of VCTP becomes low.7.And, red LED starts blinking and TV changes standby mode.

6. Troubleshooting

I explain about troubleshooting

6-1. Signal Trouble Cases Picture NG and Sound OKPicture OK and Sound NG Picture NG and Sound NG 1)2)3)We can classify the signal problem into three by checking whether Picture or Soundis abnormal. It is important to check whether both picture trouble and sound trouble occur, because we can judge the cause is panel or video processor or sound processor.

1.This is the method to find the defective board in the case of picture or sound trouble.2.You can classify the signal trouble into three kind by checking whether Picture or Sound is abnormal.3.These are "Picture NG and Sound OK", "Picture OK and Sound NG", and "Picture NG and Sound NG".4.It is important to check which the symptom is in three combinations on the chart. Because you can judge that the cause is panel or video processor or sound processor.

6-2-1. Picture NG and Sound OK (LXD60)

NoYesALL Input SourcePicture NG ?A BoardOnly HDMIInput Picture NGA BoardAV TerminalPicture NGYesB BoardAnalog TVPicture NGAV TerminalPicture OK?A Board

HAV3COMPONENTA

VIDEOPROCESSOROSDDigitalOSDVIDEOSWITCHVCTPLVDSLCDPanelHDMI I/FAnalogNoYesXV BoardDigital TVPicture NGAV TerminalPicture OK?A BoardNoCVBSTUNER

VIDEO SWTICHIC3200AV2

RGB SWTICHIC3400

VIDEO SWTICHIC3201AV1DVBTUNERRGBCVBSBXVHDMI1HDMI2No

NoYesA BoardLCD Panel or A boardNo picture butOSD is displayed ?

1.This is the case of picture NG and sound OK for LXD60.2.You need to consider video signal flow in this figure.

6-2-2. Picture NG and Sound OK (LX60F/P)

NoYesALL Input SourcePicture NG ?A BoardOnly HDMIInput Picture NGYesB BoardAnalog TVPicture NGAV TerminalPicture OK?A Board

HAV3COMPONENTA

VIDEOPROCESSOROSDDigitalOSDVIDEOSWITCHVCTPLVDSLCDPanelHDMI I/FAnalogNoTUNERAV2AV1CVBSBHDMI1HDMI2No

NoYesA BoardLCD Panel or A boardNo picture butOSD is displayed ?A BoardOnly AV TerminalSound NG

1.This is the case of picture NG and sound OK for LX60F/P.2.The checking method is almost the same as LXD60.

6-3-1. Picture OK and Sound NG (LXD60)

HAV3HeadphoneL/RA

NoYes

YesA BoardNoYesB BoardAnalog TVSound NGAV TerminalSound OK?A BoardHDMI InputSound NGALL Input SourceSound NG ?Headphone orAudio OUTSound NG ?A BoardD/AAMPHDMI1HDMI2HDMI I/FNoTUNERDVBTUNERBXVAudioAMPHPAMPLRL/RAudioAMPAUDIOSWITCHAMAudio InAV1SIFL/RL/RL/RAV2L/R MSPAV2 outAV1 outVCTPL/RNoA Board (Audio AMP)or SpeakerA BoardOnly AV TerminalSound NGSW

1.This is the case of picture NG and sound OK for LXD60.2.You need to consider audio signal flow in this figure.3.1st, please check whether all input sound sources are NG or not.4.If Yes, Speaker or MSP (Multi Sound Processor) in VCTP or Audio amplifier IC on A board is defective.5.2nd, please check Headphone or Audio out Sound NG ? 6.If Yes, VCTP on A board is defective.7.If No, Audio amplifier IC on A board or speaker is defective.

6-3-2. Picture OK and Sound NG (LX60F/P)

NoYes

YesA BoardNoYesB BoardAnalog TVSound NGAV TerminalSound OK?A BoardHDMI InputSound NGALL Input SourceSound NG ?Headphone orAudio OUTSound NG ?A Board

HAV3HeadphoneL/RAD/AAMPHDMI1HDMI2HDMI I/FNoTUNERBAudioAMPHPAMPLRL/RAudioAMPAUDIOSWITCHAMAudio InAV1SIFL/RL/RL/RAV2 MSPAV2 outAV1 outVCTPL/RNoA Board (Audio AMP)or SpeakerA BoardOnly AV TerminalSound NGSW

1.This is the case of picture OK and sound NG for LX60F/P2.The checking method is almost the same as LXD60.

6-4-1. Picture NG and Sound NG (LXD60)NoYesB BoardInput SourcecheckAnalog TVPicture NGSound NG

A BoardAV TerminalPicture NGSound NGA BoardA BoardHDMI InputPicture NGSound NGAV TerminalPicture & Sound OK?

HAV3COMPONENTA

VIDEOPROCESSOROSDDigitalOSDVIDEOSWITCHVCTPLVDSLCDPanelHDMI I/FAnalogNoCVBSTUNER

VIDEO SWTICHIC3200AV2

RGB SWTICHIC3400

VIDEO SWTICHIC3201AV1DVBTUNERRGBCVBSBXVHDMI1HDMI2

HAV3HeadphoneL/RAD/AAMPHDMI1HDMI2HDMI I/FNoTUNERDVBTUNERBXVAudioAMPHPAMPLRL/RAudioAMPAUDIOSWITCHAMAudio InAV1SIFL/RL/RL/RAV2L/R MSPAV2 outAV1 outVCTPL/RSWNoYesXV Board

A BoardAV TerminalPicture & Sound OK?Digital TVPicture NGSound NG

1.This is the case of picture NG and sound NG for LXD60.2.You need to consider both video signal flow and audio signal flow in this figure.

6-4-2. Picture NG and Sound NG (LX60F/P)NoYesB BoardInput SourcecheckAnalog TVPicture NGSound NG

A BoardAV TerminalPicture NGSound NGA BoardA BoardHDMI InputPicture NGSound NGAV TerminalPicture & Sound OK?

HAV3COMPONENTA

VIDEOPROCESSOROSDDigitalOSDVIDEOSWITCHVCTPLVDSLCDPanelHDMI I/FAnalogNoCVBSTUNER

VIDEO SWTICHIC3200AV2

RGB SWTICHIC3400

VIDEO SWTICHIC3201AV1DVBTUNERRGBCVBSBXVHDMI1HDMI2

HAV3HeadphoneL/RAD/AAMPHDMI1HDMI2HDMI I/FNoTUNERDVBTUNERBXVAudioAMPHPAMPLRL/RAudioAMPAUDIOSWITCHAMAudio InAV1SIFL/RL/RL/RAV2L/R MSPAV2 outAV1 outVCTPL/RSW

1.This is the case of picture NG and sound NG for LX60F/P.2.The checking method is almost the same as LXD60.

6-5-1. LED Blink (LXD60) No

YesB BoardRemove B Board.After Power SW ON,Power comes up ?Note : "Power comes up" means shutdown doesn't occur.24VP2RelayT80112V22P3A722A2PANEL_5VTo LCDA8V266STB_3.3V1010INV_PSU_ON1212020211~4121111211AUD24VIC801IRD24VIRD_9VIC3830IC38009V5V1.8VIC8813.3VIC862STB_1.8VSTB_3.3V (OVP)Q881

VCTPINV_PSU_ON9089STBY ( L : ON )3PANEL_ON91INVERTER_OFF ( L : ON )STB_3.3V8VCTP_RESETRESETINVERTER_ONTo InverterQ1701Q17005VA45VNOT_STBYQ873Q872AUD12V33V(SHORT)5V(OVP,SHORT)IC8855VQ8758V(OVP,SHORT)IC38508VIC8663.3V(SHORT)3.3VIC50001.8V26~303A1333V124B13124TUNER 5VTUN IRD5VXV01A11IRD 9VIRD 5VLCFLCFD801Q3862Q3861Q38607PROTECTION ( L : SOS )54,5751-5354,5751-5311111414K1Power SW K41P31K3133DOWN : 8V, 5V, 33V, 3.3VOver Voltage : 8V, 5V, STB3.3VP, A, B BoardTrouble ModeDefective BoardPAVXVBLine FilterLF802LF803Q952Q121724VTo InverterRR1A Board

NoDisconnect P2 or A7.Power SW ON.24V output at P2s 10 pinand 12V output at P2s 20~22 pinbefore Shutdown ?YesP board212

1.This chart shows trouble shooting of LED blink power problem in the case of LXD60.2.This case is that 8V or 5V or 33V or 3.3V is short-circuited or 8V or 5V or STB3.3V is over-voltage.3.1st, please check Remove B board. After Power SW ON, Power comes up ?4.If Yes, B board is defective, because 33V or 5V is short-circuited on B board.5.If No, secondly please check Disconnect P2 or A7. Power SW ON. 24V output of P2s 10 pin and 12V output of P2s 20~22 pin before Shutdown ?6.If No, P board is defective, because P board doesnt output 24V or 10V.7.If Yes, A board is NG.

6-5-2. LED Blink (LX60F/P) Note : "Power comes up" means shutdown doesn't occur.24VP2RelayT80112V22P3A722A2PANEL_5VTo LCDA8V266STB_3.3V1010INV_PSU_ON1212020211~4121111211AUD24VIC801IRD24V1.8VIC8813.3VIC862STB_1.8VSTB_3.3V (OVP)Q881

VCTPINV_PSU_ON9089STBY ( L : ON )3PANEL_ON91INVERTER_OFF ( L : ON )STB_3.3V8VCTP_RESETRESETINVERTER_ONTo InverterQ1701Q17005VA45VNOT_STBYQ873Q872AUD12V33V(SHORT)5V(OVP,SHORT)IC8855VQ8758V(OVP,SHORT)IC38508VIC8663.3V(SHORT)3.3VIC50001.8V26~303A133V124B1124TUNER 5VLCFD801Q3862Q3861Q38607PROTECTION ( L : SOS )K1Power SW K41P31K3133DOWN : 8V, 5V, 33V, 3.3VOver Voltage : 8V, 5V, STB3.3VP, A, B BoardTrouble ModeDefective BoardPAVBLine FilterLF802LF803Q952Q121724VTo InverterRRNo

YesB BoardRemove B Board.After Power SW ON,Power comes up ?P Board

NoDisconnect P2 or A7.Power SW ON.24V output at P2s 10 pinand 12V output at P2s 20~22 pinbefore Shutdown ?YesA board1212

1.This is trouble shooting of LED blink power problem in the case of LX60F/P.2.Its same as LXD60.

7. Service Information

I explain about service information.

7-1. Self CheckTable 1 Meaning of itemsBasically, OK in green or NG in red is displayed.E2 OKDPS OKVSP OKAVSW OKTUN OKMSP OKDPL ----MAS ----OPTION1 0DOPTION2 00OPTION3 19OPTION4 10OPTION5 00OPTION6 15OPTION7 3COPTION8 40OPTION9 00OPTION10 40OPTION11 13OPTION12 26OPTION13 08Check 4A

Option Code displayThe number are displayed in hexadecimal.Note: Option Code are only examples. Please refer to the option table for each model.--- No change from LX50 Keep pressing the [STATUS] button on the remote control and press the [DOWN (-/V)] button on the customer controls at the front TV set.

DisplayRef. No.DescriptionBoardE2IC1120EAROMA BoardDPSIC1501DISPLAY PROCESOR AND SCALERA BoardVSPIC1501VIDEO SIGNAL PROCESSORA BoardAVSWIC1501AV SWITCHA BoardTUNTNR001TUNERB BoardMSPIC1501MULTISTANDART SOUND PROCESSORA BoardDPL----DOLBY PROLOGIC PROCESSOR----MAS----MPEG1 AUDIO PROCESSOR----

1.This page shows the information of Self Check.2.You can check the situation of some ICs connected through IIC bus line by using Self Check.3.The method of entering Self Check is same as LX50.4.Basically, OK in green or NG in red is displayed with Self Check.5.If NG, someone of ICs are wrong.6.Meaning of the items are shown in the table 1.

7-2. Voltage Confirmation* LXD60 only

P boardAP boardSpecificationTest pointTest point(1) ON(2) Standby12VTP00112V2V---.24VTP00224V2V24V24VTP00324V1V< 2V33VTP00433V3V---12VTP00512V2V---8VTP0068V0.30V---5VTP0085V0.2V---IRD 9V (*)TP0119.2V0.3V---3.3VTP0123.3V0.1V---IRD 5V (*)TP0145.0V0.2V---12VTP01712V---24VTP018,19,2324V---STB 1.8VTP0091.8V0.1V1.8V0.1VSTB 3.3VTP0133.3V0.1V3.3V0.1V

1.In this page, I explain about voltage confirmation.2.This table shows test points and output specifications of all converted voltages in condition of ON and standby.3.Please refer to the table if you check these voltages.

1. Typical Trouble Example

I explain about typical trouble shooting.

1-1. Picture Trouble ExampleModel : All Models Symptom : Horizontal LineResult : LCD PanelModel : All Models Symptom : Horizontal LineResult : LCD PanelModel : All Models Symptom : Vertical LineResult : LCD PanelModel : All Models Symptom : Wide Vertical Line Result : LCD PanelModel : All Models Symptom : Vertical LineResult : LCD PanelModel : All Models Symptom : Irregular Color Result : LCD PanelModel : All Models Symptom : Irregular Color Result : LCD PanelModel : All Models Symptom : Abnormal Picture (Lower)Result : LCD PanelModel : All Models Symptom : Abnormal Picture (Right Half) Result : LCD Panel

1-2. Picture Trouble ExampleModel : All Models Symptom : Vertical Line Result : DG BoardModel : All Models Symptom : OSD NGResult : DG BoardModel : All Models Symptom : Picture NG (Sub Window)Result : DG BoardModel : All Models Symptom : Vertical Noise (Red) Result : DG BoardModel : All Models Symptom : Abnormal Color Result : DG BoardModel : Japan Models Symptom : Sub Window Picture NG (EPG) Result : DG BoardModel : All Models Symptom : Vertical Line Result : LCD PanelModel : All Models Symptom : Light Color Result : LCD Panel

2. The Idea of Diagnosis for LCD

I explain about the idea of diagnosis for LCD.

2-1. Diagnosis by Jig

The test pattern is automatically displayed in turn as follows by connecting Jig.

In case of LCD, the picture problem is mainly caused by LCD panel or DG(A) board defective. This Jig is able to diagnose these defective parts.

If the test pattern is normally displayed, defective parts is DG board mainly. If the test pattern is abnormally displayed, defective part is LCD panel side.

TX-26LXD600 (for UK) TX-26LX600F/P (for West/ East Europe, CIS)(Original)(After connecting Jig)

Connecting Board No : TZSC07063 Cable No : TZSC09035

3. Introduction of Jig

I explain about the introduction of Jig.

Extension Cable for DG & XV board (32LXD600 series) Necessary Extension Cables list for DG and XV boardChassis layout of 32LXD600

InverterPAPHGSP

KVSPGSSDSPSPA TUD TUCN01CN21DG6DG11DG7DG4DG5DG22XV02DG2DG3H2H3TZSA09014TZSC09038 (32)TZSC09041 (32)TZSC09019TZSC09049TZSC09012TZSC09054XVDGModel : TX-32LXD600, TX-32LXD600ADirections for Use (TX-32LXD600, LXD600A)

Parts No.Connected couplersLength (mm)QtyTZSC09038INV(CN01) DG11 P(CN203)10001TZSC09041INV(CN21) DG610001TZSC09019DG7 Panel (T-con) 12001TZSA09014AP4 -DG4, AP5 - DG512002TZSC09054DG2 H2 , DG3 H310002TZSC09049Analogue TU Digital TU12001TZSC09012XV02 DG222001

Extension Cable for DG board (32LX600 series) Necessary Extension Cables list for DG boardChassis layout of 32LX600

InverterPAPHGSP

KVSPGSSDSPSPA TUCN01CN21DG6DG11DG7DG4DG5DG22DG2DG3H2H3TZSA09014TZSC09038 (32)TZSC09041 (32)TZSC09019TZSC09054DGModel : TX-32LX600F/P, TC-32LX600DDirections for Use (TX-32LX600F/P, TC-32LX600D)

Parts No.Connected couplersLength (mm)QtyTZSC09038INV(CN01) DG11 P(CN203)10001TZSC09041INV(CN21) DG610001TZSC09019DG7 Panel (T-con) 12001TZSA09014AP4 -DG4, AP5 - DG512002TZSC09054DG2 H2 , DG3 H310002

Chassis layout of 26LXD600Extension Cable for DG & XV board (26LXD600 series) Necessary Extension Cables list for DG and XV board

InverterPHG

KVSPSPSPA TUD TUCN21DG6DG7DG4DG5DG22XV02DG2DG3H2H3TZSA09014TZSC09039 (26)TZSC09052 (26)TZSC09049TZSC09012TZSC09054XVDGModel : TX-26LXD600, TX-26LXD600ADirections for Use (TX-26LXD600, LXD600A)InverterAPSPGSSD

Parts No.Connected couplersLength (mm)QtyTZSC09039INV(CN01) DG6 P(CN203)10001TZSC09052DG7 Panel (T-con) 12001TZSA09014AP4 -DG4, AP5 - DG512002TZSC09054DG2 H2 , DG3 H310002TZSC09049Analogue TU Digital TU12001TZSC09012XV02 DG222001

Extension Cable for DG board (26LX600 series) Necessary Extension Cables list for DG boardChassis layout of 26LX600

InverterPHG

KVSPSPSPA TUCN21DG6DG7DG4DG5DG2DG3TZSA09014TZSC09039 (26)TZSC09052 (26)TZSC09054DGModel : TX-26LX600F/PDirections for Use (TX-26LX600F/P)InverterAPSPGSSDH2H3

Parts No.Connected couplersLength (mm)QtyTZSC09039INV(CN01) DG6 P(CN203)10001TZSC09052DG7 Panel (T-con) 12001TZSA09014AP4 -DG4, AP5 - DG512002TZSC09054DG2 H2 , DG3 H310002

Extension Cable for H board (32/26LXD600 series) Necessary Extension Cables list for H boardChassis layout of 32LXD600

InverterPAPGSP

KVSPGSSD

SPSPTZSC09042Model : TX-32/26LXD600, TX-32/26LXD600ADirections for Use (e.g. TX-32LXD600, LXD600A)DGDG2DG3H8H9H5H4G4G5GS8GS9H3H2H1XV

A TUD TUG15OpenTZSC09043TZSC09047TZSC09048TZSC09049TZSA09014TZSC09054H boardAP1

Parts No.Connected couplersLength (mm)QtyTZSC09042GS8 H810001TZSC09043GS9 H910001TZSC09047G4 H410001TZSA09048G5 H510001TZSC09049Analogue TU Digital TU10001TZSA09014AP1 H1 12001TZSC09054DG2 H2 , DG3 H310002

Extension Cable for H board (32/26LX600 series) Necessary Extension Cables list for H boardChassis layout of 32LX600

InverterPAPGSP

KVSPGSSD

SPSPTZSC09042Model : TX-32/26LX600F/P, TC-32LX600DDirections for Use (e.g. TX-32LXD600, LXD600A)DGDG2DG3H8H9H5H4G4G5GS8GS9H3H2H1

A TUG15OpenTZSC09043TZSC09047TZSC09048TZSA09014TZSC09054H boardAP1

Parts No.Connected couplersLength (mm)QtyTZSC09042GS8 H810001TZSC09043GS9 H910001TZSC09047G4 H410001TZSA09048G5 H510001TZSA09014AP1 H1 12001TZSC09054DG2 H2 , DG3 H310002

Extension Cable for AP board (32/26LXD/LX600 series) Necessary Extension Cables list for AP boardChassis layout of 32LXD600

InverterPGSP

KVSPGSSD

SPSPModel : TX-32/26LXD600, TX-32/26LX600F/P TC-32LX600D, TX-32/26LXD600ADirections for Use (e.g. TX-32LXD600, LXD600A)DG

TZSC09036HXVK6AP1AP2AP3AP4AP5AP6P2CN201DG4DG5H1TZSC09037TZSC09053TZSA09014AP boardTo remove the SP_L

Parts No.Connected couplersLength (mm)QtyTZSC09036K6 AP610001TZSC09037AP2P(CN101)10001TZSA09014AP4 DG4, AP5- DG5, AP1 H1 12003TZSC09053AP3 P(CN203)12001

End of Presentation

Thank you very much for attending seminar

Appedix

HDMI Interface

VideoSoundHDMI sendHDMI receiveVideoSoundDDCTMDS789123456HDMI101112151613HDMI13*2 CEC : Consumer Electronics ControlDIGAVIERACECTMDS Channel 0TMDS Channel 1TMDS Channel 2TMDS Clock Channel CEC I/FMPUMPU18195V1819Hot Plug Detect (HPD)7891234561011121516Digital Video and Audio Signal*3 TMDS : Transmission Minimized Differential Signaling*1 HDMI : High-Definition Multi media Interface*4 EDID : Extended Display Identification Data *5 DDC : Display device data channelEDIDROMHDMI*1 can transfer digital video signal, audio signal and device control signalwith a single cable.HDAVI Control uses CEC*2 signal of HDMI. (This function is effective for Panasonic 2006 year model)CEC signal is two-way and MPUs communicate it through HDMIs 13 pin.Video/Audio signals are one-way TMDS*3 signal from DIGA to VIERA.EDID*4 is transferred through DDC*5 to display the picture at an appropriate resolution.

1.In this page, I explain HDMI Interface.2.This is the block diagram in the case of connecting DIGA and VIERA via HDMI.2.HDMI (High-Definition Multi media Interface) can transfer full digital video and audio signals, and also control signal with only one cable.3.HDAVI Control uses CEC (Consumer Electronics Control) signal of HDMI.4.CEC signal is two-ways signal and each Micro Processor of DIGA and VIERA communicates it through 13pin of HDMI terminal.5.On the other hand, video and audio signals are one-way TMDS (Transmission Minimized Differential Signaling) signal from DIGA to VIERA.6.EDID (Extended Display Identification Data) is transferred through DDC (Display device data channel) to display the picture by the highest resolution.

**-**. Extension cable

IC5003HDMI InterfaceAudioSwitchIC3300HDMI2IC5002EEPROM(EDID data)IC1501VCTPAnalog AudioA-BOARDHDMI AudioDigital DataAnalog DataHDCP CIPHERDECRYPTORTMDS RECEIVER

and

TMDS DECODERHDMI1IC5001EEPROM(EDID data)EDID dataMSPTMDSEDID dataTMDSD/AIC1380AMPIC1381HDMI Video

(*) HDCP : High-bandwidth Digital Content ProtectionHDMI Interface IC decodes TMDS signal to digital video and audio signals by using HDCP(*) and outputs them to VCTP.Each EEPROM has a different EDID data including monitor information.LX60 has two HDMI terminals, but those two cannot be used at the same time.

1.This chart shows HDMI signal flow.2.HDMI uses TMDS signal that is the differential signal including digital video and audio signals.3.HDMI Interface IC decodes TMDS signal to video and audio signals by using HDCP (High-bandwidth Digital Content Protection) CIPHER.4.The video signal is output to VCTP directly.5.The audio signal is converted into analog by IC1380 and is amplified by IC1381. Then, it is output to VCTP by AUDIO SW IC.6.Each EEPROM, IC5001 and IC5002 has a different EDID data including monitor information. And, the EDID data is exchanged between EEPROM and HDMI Interface IC through DDC.7.Therefore, the picture can be displayed by the highest resolution.8.LX60 has 2 HDMI terminals, but those two cannot be used at the same time. Because, HDMI Interface IC has only one decoder.

1.Hello, every one.2.Im Takenori Shukuin in charge of instructor for TV products.3.I would like to hold seminar for LCD.4.About Model No. LCDs are TC-32/26/23LXD60,LX60F/P.5.Are you ready?This page is the seminars contents of Review of E-Seminar. 1. LCD Line-up for Y2006 2. Chassis Structure 3. Explanation for Signal Circuit 4. Explanation for Power Supply Circuit 5. TroubleshootingThis page is the seminars contents of Hands on for LCD. 1. Typical Trouble Example 2. The Idea of Diagnosis for LCD 3. Introduction of JigI explain about LCD Line-up for Y2006.1.In Europe and CIS market, LX600F/P is sold as a step-up model. 2.LX50 leader model changes LX60F/P. The leader models dont have digital tuner.3.And, LX6F/P is the derivative Model.1.This table shows the summary of current LX50 and new LX60. 2.LX60 has the following 4 new functions.3.New video processor called VCTP is introduced.4.2 HDMI terminals are newly introduced.5.HDAVI control is introduced.6.Slim and compact design.7.And, all models don't have SD card slot, PC input, SRS surround system as LX50.I explain about chassis structure.1.I explain about the difference of PCB layout between LX50 and LX60.2.There are 4 different points from LX50.3.1st, DG and H board are included to A board. 4.2nd, the location of P and K board is changed.5.3rd, the location of AV3 terminal is changed from G board to H board.6.4th, 2 HDMI terminals are newly introduced in A board.7.In addition, XV board is introduced for only LXD.1.This page shows PCB function.2.In this table, please note about the board name and the kind of installed board for each model.3.XV Board in LXD 60 has the function of digital tuner, but LX60F/P doesnt have the one.4.In addition, please note XV board is Board Change Only.I explain about signal circuit.1.I explain about the difference of circuit between LX50 and LX60.2.There are 4 different points from LX50.3.1st, the function of H and DG board is merged into A board. 4.2nd, VCTP is introduced instead of VIDEO SW, SOUND CONTROL, MPU, GC4PRO, GC4L and LVDS as shown in yellow color.5.3rd, LX60 models have 2 HDMI terminals.6.4th, CEC circuit for HDAVI Control is added on A board.1.This is the block diagram of video signal flow of LXD60.2.Blue line is Digital signal flow and black line is Analog signal flow .3.Analog signals are going from DVB tuner, tuner, AV1, AV2,Component & AV3 into VCTP.4.Digital signal is also going VCTP from HDMI terminal into VCTP.5.VCTP mainly has 3 functions.6.1st,it selects an input video signal.7.2nd, it mix OSD with the signal.8.3rd, it processes the signal with OSD, change it to LVDS signal and gives LVDS signal to LCD.9.IC3400 selects the video signal from DVB tuner or AV2 terminal.10.IC3200 or IC3201 selects the video signal from DVB tuner or VCTPs VIDEO SW.1.This video signal flow is LX60F/P.2.The difference between LXD60 & LX60F/P is XV board.3.But, the video signal flow is almost the same as LXD60.1.This is the block diagram of audio signal flow of LXD60.2.Blue line is Digital signal flow and black line is Analog signal flow .3.Some analog signals are going from Tuner, AV1, AV2 & AV3 into VCTP.4.The other analog signals are going from Tuner, DVB Tuner, Audio in into AUDIO SW IC(IC3300).5.Digital signal is going from HDMI terminal into AUDIO SW IC.6.VCTP has the function of MSP (Multiple Sound Processor). MSP outputs L/R signal to Amplifiers for speakers and headphone.1.The audio signal flow is LX60F/P.2.Blue line is Digital signal flow and black line is Analog signal flow .3.The difference between LXD60 & LX60F/P is XV board.4.But, the audio signal flow is almost the same as LXD60.I explain about power supply circuit.1.This is Power Supply Outline of LXD60.2.P board outputs 24V and 12V to A board.3.In A board, IRD24V is converted to STB3.3V, STB1.8V. And, IRD9V & AUD12V is converted to 5V, 33V, and 8V.1.This is Power Supply Outline of LX60F/P.2.P board outputs 24V and 12V to A board.3.In A board, IRD24V is converted to STB3.3V, STB1.8V. And, IRD9V & AUD12V is converted to 5V, 33V, and 8V.4.There are 3 differences from LXD60.5.1st, No IRD 9V and IRD 5V because LX60F/P doesn't have XV board.6.2nd, Audio SW (IC3300) is operated by 8V.7.3rd, NOT_STBY is used instead of IRD_PSU_ON.1.This is a diagram of LCD panel interface.2.VCTP converts video data to LVDS and outputs it to panel controller.3.LCD panel is operated by 24V and 5V. 4.VCTP outputs Inverter_OFF signal and the signal is inverted by Q952. Inverter board works by it.5. BackLight_PWM signal output by VCTP passes Level transfer and controls LCD backlights.I explain about protection circuit.Protection Circuit prevents damages by over-voltage or by short-circuiting.1.This shows Power LED situation and the condition in the case of power trouble.2.There is only one situation.3.When 8V or 5V or 33V or 3.3V becomes down, or 8V or 5V or STB 3.3V becomes over-voltage, the voltage of 7pin of VCTP becomes low. And, TV set changes standby mode and Power LED starts blinking.4.In this situation, you judge the defective board is probably P, A or B board.1.This chart shows the operation of the protection circuit in A board.2.Each D3862, D3864 and D3863 detect over-voltage of STB3.3V, 8V and 5V.3.Each D3865, D3866, D3871 and D3867 detect short-circuiting of 8V, 5V, 3.3V and 33V.4.When one of these voltages becomes over-voltage, the base voltage of Q3862 becomes high.5.And, when one of the other voltages becomes short-circuiting, the base voltage of Q3861 becomes low.6.Then, Q3860 is turned on and PROTECT signal of 7pin of VCTP becomes low.7.And, red LED starts blinking and TV changes standby mode.I explain about troubleshooting1.This is the method to find the defective board in the case of picture or sound trouble.2.You can classify the signal trouble into three kind by checking whether Picture or Sound is abnormal.3.These are "Picture NG and Sound OK", "Picture OK and Sound NG", and "Picture NG and Sound NG".4.It is important to check which the symptom is in three combinations on the chart. Because you can judge that the cause is panel or video processor or sound processor.1.This is the case of picture NG and sound OK for LXD60.2.You need to consider video signal flow in this figure.1.This is the case of picture NG and sound OK for LX60F/P.2.The checking method is almost the same as LXD60.1.This is the case of picture NG and sound OK for LXD60.2.You need to consider audio signal flow in this figure.3.1st, please check whether all input sound sources are NG or not.4.If Yes, Speaker or MSP (Multi Sound Processor) in VCTP or Audio amplifier IC on A board is defective.5.2nd, please check Headphone or Audio out Sound NG ? 6.If Yes, VCTP on A board is defective.7.If No, Audio amplifier IC on A board or speaker is defective.

1.This is the case of picture OK and sound NG for LX60F/P2.The checking method is almost the same as LXD60.1.This is the case of picture NG and sound NG for LXD60.2.You need to consider both video signal flow and audio signal flow in this figure.1.This is the case of picture NG and sound NG for LX60F/P.2.The checking method is almost the same as LXD60.1.This chart shows trouble shooting of LED blink power problem in the case of LXD60.2.This case is that 8V or 5V or 33V or 3.3V is short-circuited or 8V or 5V or STB3.3V is over-voltage.3.1st, please check Remove B board. After Power SW ON, Power comes up ?4.If Yes, B board is defective, because 33V or 5V is short-circuited on B board.5.If No, secondly please check Disconnect P2 or A7. Power SW ON. 24V output of P2s 10 pin and 12V output of P2s 20~22 pin before Shutdown ?6.If No, P board is defective, because P board doesnt output 24V or 10V.7.If Yes, A board is NG.1.This is trouble shooting of LED blink power problem in the case of LX60F/P.2.Its same as LXD60.I explain about service information.1.This page shows the information of Self Check.2.You can check the situation of some ICs connected through IIC bus line by using Self Check.3.The method of entering Self Check is same as LX50.4.Basically, OK in green or NG in red is displayed with Self Check.5.If NG, someone of ICs are wrong.6.Meaning of the items are shown in the table 1.1.In this page, I explain about voltage confirmation.2.This table shows test points and output specifications of all converted voltages in condition of ON and standby.3.Please refer to the table if you check these voltages.I explain about typical trouble shooting.

I explain about the idea of diagnosis for LCD.

I explain about the introduction of Jig.

Appedix1.In this page, I explain HDMI Interface.2.This is the block diagram in the case of connecting DIGA and VIERA via HDMI.2.HDMI (High-Definition Multi media Interface) can transfer full digital video and audio signals, and also control signal with only one cable.3.HDAVI Control uses CEC (Consumer Electronics Control) signal of HDMI.4.CEC signal is two-ways signal and each Micro Processor of DIGA and VIERA communicates it through 13pin of HDMI terminal.5.On the other hand, video and audio signals are one-way TMDS (Transmission Minimized Differential Signaling) signal from DIGA to VIERA.6.EDID (Extended Display Identification Data) is transferred through DDC (Display device data channel) to display the picture by the highest resolution.1.This chart shows HDMI signal flow.2.HDMI uses TMDS signal that is the differential signal including digital video and audio signals.3.HDMI Interface IC decodes TMDS signal to video and audio signals by using HDCP (High-bandwidth Digital Content Protection) CIPHER.4.The video signal is output to VCTP directly.5.The audio signal is converted into analog by IC1380 and is amplified by IC1381. Then, it is output to VCTP by AUDIO SW IC.6.Each EEPROM, IC5001 and IC5002 has a different EDID data including monitor information. And, the EDID data is exchanged between EEPROM and HDMI Interface IC through DDC.7.Therefore, the picture can be displayed by the highest resolution.8.LX60 has 2 HDMI terminals, but those two cannot be used at the same time. Because, HDMI Interface IC has only one decoder.