Toshiba 42AV501P Service Manual
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Toshiba 42AV501P Service Manual

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Page 1 of 1
SERVICE MANUAL
LCD Color Television
42AV501P
Ver. 2.01
This model is classified as a
green product
(*1), as indicated by the underlined serial number.
This Service Manual describes replacement parts for the green product. When repairing this
green product, use the part(s) described in this manual and
lead-free solder
(*2).
GREEN PRODUCT PROCUREMENT
LEAD-FREE
For (*1) and (*2), refer to
and
SOLDER.
© TOSHIBA CORPORATION

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  • Page 1 This Service Manual describes replacement parts for the green product. When repairing this green product, use the part(s) described in this manual and lead-free solder (*2). GREEN PRODUCT PROCUREMENT LEAD-FREE For (*1) and (*2), refer to SOLDER. © TOSHIBA CORPORATION...

  • Page 2: Lead-Free Solder

    LEAD-FREE SOLDER Page 1 of 1 LEAD-FREE SOLDER This product is manufactured using lead-free solder as a part of a movement within the consumer products industry at large to be environmentally responsible. Lead-free solder must be used in the servicing and repair of this product. WARNING: This product is manufactured using lead free solder.

  • Page 3: Important Notice

    WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Toshiba shall not be liable for any damages, losses, expenses or costs, if any, incurred in connection with or as a result of use of any information or data provided herein.

  • Page 4: Pcb Layout

    Page 1 of 1 PCB LAYOUT U01A U03A SIGNAL POWER U02A KEY/LED/RMT...

  • Page 5: Block Diagram

    Page 1 of 1 BLOCK DIAGRAM...

  • Page 6: Safety Instruction

    Page 1 of 4 SAFETY INSTRUCTION WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW. Safety Precaution WARNING: SERVICING SHOULD NOT BE ATTEMPTED BY ANYONE UNFAMILIAR WITH THE NECESSARY PRECAUTIONS ON THIS RECEIVER. THE FOLLOWING ARE THE NECESSARY PRECAUTIONS TO BE OBSERVED BEFORE SERVICING THIS CHASSIS.
  • Page 7 Page 2 of 4 inflammability, voltage resistance, etc. therefore, use only replacement parts that have these same characteristics. Use only the specified parts when the mark is indicated in the circuit diagram or parts list. 7. Parts mounting and routing dressing of wirings should be the same as that used originally.
  • Page 8 Page 3 of 4 Resistance values in orms (Ω). V: Voltmeter or oscilloscope (r.m.s. or peak reading) Input resistance : 1 MΩ Input capacitance : 200 pF Frequency range : 15 Hz to 1 MHz and d.c. respectively Note: Appropriate measures should be taken to obtain the correct value in case of non sinusoidal waveforms.

  • Page 9: Product Safety Notice

    Page 4 of 4 Product Safety Notice Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.

  • Page 10: Precautions For Handling The Lcd Module

    Handling the LCD Module Page 1 of 4 SAFETY INSTRUCTION Handling the LCD Module Safety Precaution In the event that the screen is damaged or the liquid crystal (fluid) leaks, do not breathe in or drink this fluid. Also, never touch this fluid. Such actions could cause toxicity or skin irritation. If this fluid should enter the mouth, rinse the mouth thoroughly with water.
  • Page 11 Handling the LCD Module Page 2 of 4 3. 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 solied, use a CRT cleaner as a cleaner. Wipe off the panel surface by drop the cleaner on the cloth.
  • Page 12 Handling the LCD Module Page 3 of 4 6. CMOS-LSI circuitry is used in the LCD module, so avoid damage due to static electricity. When handling the module, use a wrist ground or anchor ground. 7. Do not expose the LCD module to direct sunlight or strong ultraviolet rays for an extended period of time.
  • Page 13 Handling the LCD Module Page 4 of 4 10. When transporting the LCD module, do not use packing containing epoxy resin (amine) or silicon resin (alcohol or oxim). The gas generated by these materials can cause loss of polarity.

  • Page 14: Green Product Procurement

    Corporation recognizes environmental protection as a key management tasks, and is doing its utmost to enhance and improve the quality and scope of its environmental activities. In line with this, Toshiba proactively promotes Green Procurement, and seeks to purchase and use products, parts and materials that have low environmental impacts.

  • Page 15: Schematic Diagram

    Page 1 of 2 SCHEMATIC DIAGRAM Precaution WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION" FOR DIRECT VIEW CTV ONLY, "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" OF THIS MANUAL. CAUTION: The international hazard symbols " " in the schematic diagram and the parts list designate components which have special characteristics important for safety and should be replaced only with types identical to those in the original circuit or specified in the parts list.
  • Page 16 Page 2 of 2 = Electrolytic capacitor = Mylar capacitor 3. The parts indicated with " " have special characteristics, and should be replaced with identical parts only. 4. Voltages read with DIGITAL MULTI-METER from point indicated to chassis ground, using a color bar signal with all controls at normal, line voltage at nominal AC volts.

  • Page 30: Service Mode

    ADJUSTMENT [LCD Color Television] ASIA_EU Page 1 of 16 ADJUSTMENT Service Mode Entering to Service Mode 1. Set VOLUME to minimum and press button once on remote control. ↓ 2. Press button again and hold button down. ↓ Service Mode display 3.
  • Page 31 ADJUSTMENT [LCD Color Television] ASIA_EU Page 2 of 16 Displaying the Adjustment Menu Press MENU button on TV. Service Mode Press ↑ ↓ Press Adjustment Mode Key Function in the Service Mode The following key entry during display of adjustment menu provides special functions. CAUTION: Never try to perform initialization unless you have changed the memory IC.
  • Page 32 ADJUSTMENT [LCD Color Television] ASIA_EU Page 3 of 16 Test signal selection Selection of the adjustment items (on TV or remote control) Volume +/- (on TV or remote control) Change of the data value Adjustment menu mode ON/OFF MENU button (on TV) "RCUT"...
  • Page 33 ADJUSTMENT [LCD Color Television] ASIA_EU Page 4 of 16 GCUT G CUT OFF BCUT B CUT OFF RDRV R DRIVE GDRV G DRIVE BDRV B DRIVE BRTC BRIGHTNESS CENTER COLC COLOR CENTER TNTC BASE BAND TINT CNTX CONTRAST MAX VOLUX MAX VOLUME LIMITED OPT1 TV SET OPTION 1 OPT2...
  • Page 34 Panel vendor OPT4 value OPT5 value AV501P 32AV501P 0x01 0x05 0x07 0x05 37AV501P 0x01 0x06 0x07 0x06 42AV501P 0x01 0x07 OPT4 Ex. OPT4 value 0x05 indicates that panel vendor is AUO AMVA. OPT4 (bit7) (bit6) (bit5) (bit4) (bit3) (bit2) (bit1) (bit0)
  • Page 35 ADJUSTMENT [LCD Color Television] ASIA_EU Page 6 of 16 Convert from Bit (Binary) to Hex The table for converting from bit (D7-D0) to hex (0x**). BIT (Binary) High nibble Low nibble E.g. If Bit D7-0 = 0101 1010, Hex data is 0x5A. Exit from Service Mode Pressing POWER button to turn off the TV once.
  • Page 36 Perform "Auto tune" on the owner's manual. PANEL (HEX) Model name Panel vendor 0x01 or 0x04 32AV501P IPS(old) or IPS(new) 0x02 or 0x05 37AV501P IPS(old) or IPS(new) 0x03 or 0x06 42AV501P LGD(old) or LGD(new) Initializing Data setting flowchart after replacing the Signal Unit...
  • Page 37 ADJUSTMENT [LCD Color Television] ASIA_EU Page 8 of 16 Test Signal Selection...

  • Page 38: Self-Diagnostic Function

    ADJUSTMENT [LCD Color Television] ASIA_EU Page 9 of 16 Every pressing of button on the remote control changes the built-in test patterns on screen as described below in Service Mode. Picture Signal Red raster Green raster Blue raster All Black All White Self Diagnostic Function 1.
  • Page 39 ADJUSTMENT [LCD Color Television] ASIA_EU Page 10 of 16 (1) Firmware : Version information of microprocessor (2) Time : Total hour of turn the TV on. (Unit : H) (3) Bus line : -- "OK" is normal SCL-GND (Red indication) : SCL-GND short circuit SDA-GND (Red indication) : SDA-GND short circuit SCL-SDA (Red indication) : SCL-SDA short circuit (4) Bus cont : --- "OK"...
  • Page 40 ADJUSTMENT [LCD Color Television] ASIA_EU Page 11 of 16 Version Check Mode 1. Press "9" button twice on remote control during display of adjustment menu in the service mode. The version of main MPU will be checked. 2. During Version Check, the following displays are shown. * Version check display and Item are subject to the models.
  • Page 41 ADJUSTMENT [LCD Color Television] ASIA_EU Page 12 of 16 --NG : A/D adjustment set incorrect. : A/D adjustment is not needed. Because its picture format isn't used. (6) RF AGC adjustment value RF Adjustment Value is shown. (7) Model Name Model name information (ascii code).
  • Page 42 ADJUSTMENT [LCD Color Television] ASIA_EU Page 13 of 16 Display Video and PC format information (3) MAIN PLL : Main PLL information : Display 1 byte data at five. (4) SCREEN SIZE : Display the screen size as follows. Exact Scan Wide Super Live 2 Cinema 2...
  • Page 43 ADJUSTMENT [LCD Color Television] ASIA_EU Page 14 of 16 D6 (bit6) - (no use) D5 (bit5) FRONT Key Disable Enable D4 (bit4) All keys except input selector key Disable Enable (Video/TV) D3 (bit3) User remote control operation Disable Enable (Service mode and Supere User mode may possible to setting only) D2 (bit2)

  • Page 44: Led Indication

    ADJUSTMENT [LCD Color Television] ASIA_EU Page 15 of 16 100 is used as ATV when DTV option is disable. OPT7 OPT7 FUNCTION DESCRIPTION 0 (Normal) D7 (bit7) Enable mode that speaker volume will be set in Enable Disable forced when turn ON the main power D6 (bit6) ~ Forced speaker volume 0 ~ 100 [decimal] (Normal: 0)
  • Page 45 ADJUSTMENT [LCD Color Television] ASIA_EU Page 16 of 16 1 Green is OFF; Abnormal operation Turn OFF the TV and unplug Red blinks continuously at 0.5- the power cord. second intervals. Plug the power cord in again and turn ON the TV. 2 Green is OFF;...

  • Page 46: Panel Identification

    Page 1 of 1 PANEL IDENTIFICATION Panel Identification If the several panels are alternatively used in the same model without amending the model name, the identification marking will be shown at the last digit of the set serial number on the specification label on the back cover.
  • Page 47 Page 1 of 1 PARTS LIST U02A KEY/RMT/LED (PE0486) Block : Search 1 / 2 Jump Page : Location : Search Parts No. : > Block Location Parts No. Description U02A KEY/RMT/LED (PE0486) U02A 7 5 01 0 8 35 PC BOARD ASSY, PE0486A1, KEY/REM/LED U02A KEY/RMT/LED (PE0486) CB02 7 5 00 5 9 69 CAPACITOR ELECTROLYTIC 10V 221M, ESRE100ETC2...
  • Page 48 Page 1 of 1 PARTS LIST U03A MAIN_POWER (PE0579) Block : Search 1 / 9 Jump Page : Location : Search Parts No. : > Block Location Parts No. Description U03A MAIN_POWER (PE0579) U03A 7 5 0 1 0 9 8 5 PC BOARD ASSY, PE0579A1, MAIN_POWER U03A MAIN_POWER (PE0579) C801 7 6 5 0 3 5 1 0 CAPACITOR, PLASTIC FILM, LE224-C...
  • Page 49 Page 1 of 1 PARTS LIST Miscellaneous Block : Search 1 / 1 Jump Page : Jump Location : Search Parts No. : > Block Location Parts No. Description Miscellaneous B001A 7500 8814 LCD PANEL, G7LPL42WX7, LC420WX7-SLC1 Miscellaneous B001B 7501 1173 LCD PANEL, LC420WXN-SAB1(new) Miscellaneous B230 2374 8087 WASHER, 10X4.2XT0.3TPO...
  • Page 50 Page 1 of 1 PARTS LIST Accessory Block : Search 1 / 1 Jump Page : Jump Location : Search Parts No. : > Block Location Parts No. Description Accessory Y101 7501 0356 OWNERS MANUAL, ENG Accessory Y101E 7501 0358 OWNERS MANUAL, EURO Accessory Y101N 7501 0360 OWNERS MANUAL, NORDIC...
  • Page 51 Page 1 of 1 PARTS LIST Cabinet Block : Search 1 / 1 Jump Page : Jump Location : Search Parts No. : > Block Location Parts No. Description Cabinet A201 7501 0959 FRNT BEZEL ASSY Cabinet A401 7501 0960 BACK COVER ASSY Cabinet A411 2371 7267 SCREW, BITTB4X16 SBN...
  • Page 52 Page 1 of 2 PARTS LIST Precaution WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION" FOR DIRECT VIEW CTV ONLY, "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" OF THIS MANUAL. CAUTION: The international hazard symbols " " in the schematic diagram and the parts list designate components which have special characteristics important for safety and should be replaced only with types identical to those in the original circuit or specified in the parts list.
  • Page 53 Page 2 of 2 : Metal Film : Fusible Resistor All CD and PF capacitors are ±5 %, 50 V and all resistor, ±5 %, 1/6 W unless otherwise noted.
  • Page 54 Page 1 of 1 PARTS LIST All Block Block : Search 1 / 35 Jump Page : Location : Search Parts No. : > Block Location Parts No. Description U01AS SIGNAL (PE0484) U01AS 7501 0399 PC BOARD ASSY, PE0484A, SIGNAL U01AS SIGNAL (PE0484) C101 7679 7220 CE04G1H220M...
  • Page 55 Page 1 of 1 PARTS LIST U01AS SIGNAL (PE0484) Block : Search 1 / 24 Jump Page : Location : Search Parts No. : > Block Location Parts No. Description U01AS SIGNAL (PE0484) U01AS 7501 0399 PC BOARD ASSY, PE0484A, SIGNAL U01AS SIGNAL (PE0484) C101 7679 7220 CE04G1H220M...

  • Page 56: Function And Operation

    Page 1 of 2 FUNCTION AND OPERATION The Remote Control Simple at-a-glance reference of your remote control.
  • Page 57 Page 2 of 2...

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