Toshiba 42HL67 - 42" LCD TV Service Manual Download Page 9 | Manualshive

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B

Picture

Is

the Picture

Missing or

Distorted?

Missing

Distorted

Is the

Missing

Picture Analog or

Digital?

Is Distorted

Picture Analog or

Digital?

Analog

Digital

Digital

Replace Analog Signal

Processing Section, then

suspect Digital.

Replace Digital

Signal Processing

Section.

Replace Digital

Signal

Processing

Section.

Cable Card is a function of Digital
Signal Processing Area

Analog Processing includes:

Composite Video/Audio

S-Video/Audio
NTSC Tuner Video/Audio

Digital Audio after Digital Processing

Color stream Video/Audio

DVI/Computer Audio In

Digital Processing includes:

RGB Computer Video

HDMI
ATSC (8Vsb) HD
Tuner Signals

Ethernet

Questions or Statements in flow chart
pertain to only the defined areas. It is
assumed that all other inputs and
functions operate correctly.

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Summary of Contents for 42HL67 - 42" LCD TV

Page 1: ...green product When repairing this green product use the part s described in this manual and lead free solder 2 For 1 and 2 refer to GREEN PRODUCT PROCUREMENT and LEAD FREE SOLDER TOSHIBA CORPORATION 2009 For Technical Bulletins Technical Tips or other information regarding the service of this model visit the Toshiba America Consumer Products National Service Division website at www7 toshiba com ...

Page 2: ...of this product The melting temperature of lead free solder is higher than that of leaded solder by 86ºF to 104ºF 30ºC to 40ºC Use of a soldering iron designed for lead based solders to repair product made with lead free solder may result in damage to the component and or PCB being soldered Great care should be made to ensure high quality soldering when servicing this product especially when solde...

Page 3: ... µF AC type capacitor between a known good earth ground water pipe conduit etc and the exposed metallic parts one at a time Measure the AC voltage across the combination of 1500 ohm resistor and 0 15 µF capacitor Reverse the AC plug at the AC outlet and repeat AC voltage measurements for each exposed metallic part Voltage measured must not exceed 0 3 volts rms This corresponds to 0 2 milliamps AC ...

Page 4: ...t can adversely affect the performance Also use caution when handling the polarized screen because it can easily be damaged 4 If the panel surface becomes soiled wipe with cotton or a soft cloth If this does not remove the soiling breathe on the surface and then wipe again If the panel surface is extremely soiled wipe the panel surface with CRT cleaner sprayed onto the cloth Do not spray the clean...

Page 5: ...o not store the LCD module below the temperature conditions described in the specifications Doing so could result in freezing of the liquid crystal loss of resilience or other damage 10 Do not disassemble the LCD module Such actions could result in improper operation 11 When transporting the LCD module do not use packing containing epoxy resin amine or silicon resin alcohol or oxim The gas generat...

Page 6: ...ng the MUTE button press MENU button on TV set Selecting the Adjusting Item Every pressing of CH or button in the service mode changes the adjustment items Adjusting the Data Pressing of VOLUME or button will change the value of data in the range from 00H to FFH The variable range depends on the adjusting item Exiting Service Mode Press the POWER button once to turn off the TV 5 5 ...

Page 7: ...s Upgrade successful Upgrade failed LED Indication The yellow blue and red green LED lights on the TV at the bottom center of the TV indicate the TV s status as described below Note If the TV loses A C power e g a power outage occurs or the power cord is unplugged when power is restored the yellow LED will blink while the TV is booting until the remote control is usable This is normal and is not a...

Page 8: ... chart pertain to only the defined areas It is assumed that all other inputs and functions operate correctly Reconfirm proper operation of all analog audio sources Cable Card is a function of Digital Signal Processing Area Analog Processing includes Composite Video Audio S Video Audio NTSC Tuner Video Audio Digital Audio after Digital Processing Color stream Video Audio DVI Computer Audio In Digit...

Page 9: ...Signal Processing Section Cable Card is a function of Digital Signal Processing Area Analog Processing includes Composite Video Audio S Video Audio NTSC Tuner Video Audio Digital Audio after Digital Processing Color stream Video Audio DVI Computer Audio In Digital Processing includes RGB Computer Video HDMI ATSC 8Vsb HD Tuner Signals Ethernet Questions or Statements in flow chart pertain to only t...

Page 10: ... Processing Area Analog Processing includes Composite Video Audio S Video Audio NTSC Tuner Video Audio Digital Audio after Digital Processing Color stream Video Audio DVI Computer Audio In Digital Processing includes RGB Computer Video HDMI ATSC 8Vsb HD Tuner Signals Ethernet Questions or Statements in flow chart pertain to only the defined areas It is assumed that all other inputs and functions o...

Page 11: ... in No Is 18 VDC present at pin 7 of P806A when the unit is plugged in No Yes Suspect the Low B supply circuit Is 5VDC present at pin 13 of P811A with the unit plugged in No Yes Suspect the Low B supply then the main power supply circuit Suspect the system control SYSCON circuit Yes Use the LED blink chart to help locate the problem Suspect the main power supply circuit Dead set No sound or pictur...

Page 12: ...ower distribution diagram are the voltages normal at P811A and P811B Suspect the AV tuning module This can be confirmed by using the wiring interconnect diagram and checking the Y Pb Pr signals at plug CN72A YES Suspect the Low B module NO No or distorted video Does the back light function normally when the unit is turned on YES NO Is the screen discolored or does it have streaks or dark areas wit...

Page 13: ...t pins 1 and 5 of P804 when the unit is turned on YES NO Replace the Main Power supply Is 6VDC present at pin 8 of CN91A when the unit is turned on NO YES Replace the Low B power supply Is 3 3 VDC present at pin 7 of P812A shortly after the unit is turned on YES Replace the SYSCON section NO 12 12 ...

Page 14: ...the voltages normal at P812A and P812B Suspect the Low B module Using the power distribution diagram are the voltages normal at CN90A and CN91B NO YES Suspect the digital module This can be confirmed by using the wiring interconnect diagram and an oscilloscope and checking the right and left audio signals at CN71 No or distorted Audio 13 13 ...

Page 15: ...rranty Concession required for LCD panel replacement Digital photo may be requested Contact Technical Support Does the screen light unevenly Normal screen with a shaded area NO This normally indicates a defective CCFL Lamp The display should be replaced Using a scope or frequency counter is the CCFL inverter operating Suspect the CCFL inverter NO YES Operation of the inverter can be determined by ...

Page 16: ...LOW B U02A AV TERM U03A SIGNAL U04A POWER U01A LED U03C KEY U03D Front AV U03B 15 15 ...

Page 17: ...16 16 ...

Page 18: ...17 17 ...

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Page 21: ...20 20 ...

Page 22: ...Stand Exploded View A425 A426 A427 A428 A429 21 21 ...

Page 23: ...CERAMIC DISC 500V B 0 01UF K C8601 75004442 CAPACITOR CERAMIC CHIP 50V B 1UF K C8602 75005709 CAPACITOR CHIP CERA 50V B 0 47UF K GRM21BB31H474KA87L C8603 76092463 CAPACITOR CERAMIC CHIP 16V B 0 22UF K C8603 76092463 CAPACITOR CERAMIC CHIP 16V B 0 22UF K C8604 76109102 CAPACITOR CERAMIC CHIP 50V B 1000PF K C8605 76105101 CAPACITOR CERAMIC CHIP 50V CH 100PF J C8606 76092796 CAPACITOR CERAMIC CHIP 50...

Page 24: ... J CE74 76092883 CAPACITOR CERAMIC CHIP 50V B 0 1UF K CE75 76125012 CAPACITOR ELECTROLYTIC 25V 2700UF M CE76 76073128 CAPACITOR ELECTROLYTIC 6 3V 1000UF M CE77 76073128 CAPACITOR ELECTROLYTIC 6 3V 1000UF M CE90 76073186 CAPACITOR ELECTROLYTIC 35V 470UF M CE91 76617028 CAPACITOR ELECTROLYTIC 16V 1200UF M CE92 76666471 CAPACITOR ELECTROLYTIC 16V 470UF M CE930 75005709 CAPACITOR CHIP CERA 50V B 0 47U...

Page 25: ...6 DIODE ZENER MTZJ12C DE42 23357703 DIODE 1SS355 DE43 23357515 DIODE RK34 DE60 23357842 DIODE ZENER MTZJ6 8B DE60 23357842 DIODE ZENER MTZJ6 8B DE70 23357810 DIODE FMB G14L DE90 23357515 DIODE RK34 DE93 23357871 DIODE ZENER MTZJ15B F801 23144319 FUSE CARTRIDGE 5 2X20 125V 8A F801A 23165433 FUSE HOLDER 5 2 F801B 23165433 FUSE HOLDER 5 2 F860 23144381 FUSE RADIAL LEAD SUB MINIATUR 250V 4A F870 23144...

Page 26: ...8B EH F1 TV4 P806B 23713759 PLUG 8P 2 5MM G B8B EH F1 TV4 P811A 23713816 SOCKET 127301113K2 P812A 23713817 SOCKET 127301115K2 PG02 23165495 EARTH TERMINAL MET31 0332 PG03 23165495 EARTH TERMINAL MET31 0332 PG04 23165495 EARTH TERMINAL MET31 0332 Q831 23205463 TRANSISTOR 2SC2712 Y TE85L F Q831 23205463 TRANSISTOR 2SC2712 Y TE85L F Q832 23205463 TRANSISTOR 2SC2712 Y TE85L F Q840 75005723 IC MP1591DS...

Page 27: ...R863 76552100 RESISTOR OXIDE METAL FILM 1 2W 10 OHM J R864 76552101 RESISTOR OXIDE METAL FILM 1 2W 100 OHM J R865 76552330 RESISTOR OXIDE METAL FILM 1 2W 33 OHM J R866 76382124 RESISTOR OXIDE METAL FILM 1W 120K OHM J R866 76382124 RESISTOR OXIDE METAL FILM 1W 120K OHM J R8660 76382104 RESISTOR OXIDE METAL FILM 1W 100K OHM J R867 76552391 RESISTOR OXIDE METAL FILM 1 2W 390 OHM J R868 76552181 RESIS...

Page 28: ...445 CHIP JUMPER 1608TYPE RE55 76011471 RESISTOR CHIP 1 20W 470 OHM J RE56 76011471 RESISTOR CHIP 1 20W 470 OHM J RE57 76011471 RESISTOR CHIP 1 20W 470 OHM J RE58 76011102 RESISTOR CHIP 1 20W 1K OHM J RE58 76011102 RESISTOR CHIP 1 20W 1K OHM J RE59 76011471 RESISTOR CHIP 1 20W 470 OHM J RE70 76366470 RESISTOR CARBON FILM 1 6W 47 OHM J RE71 76000151 RESISTOR METAL FILM 1 4W 750 OHM F RE72 76366470 R...

Page 29: ... PE0306D1 U02A 75006108 PWU LOWB PE0307D1 U03A 75006083 PWU TN_AV PE0248C1 U03B 75006110 PWU F AV PE0248C2 U03C 75006111 PWU LED IR_PASS PE0248C3 U03D 75006112 PWU KEY PE0248C4 U04AS 75006509 PC BOARD ASSY PE0249A1 SEINE W661 75005717 SPEAKER ASSY SPK1493AO 60X120 8 OHM 10W 28 ...

Page 30: ...Replacement Parts List 29 ...

Page 31: ...Replacement Parts List 30 ...

Page 32: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...

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