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40_50L2546/56 Service manual
Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful
radiation and materials, various measures are provided in this LCD Television.
Be sure to read cautionary items described in the manual before servicing.
These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric
shock, do not perform any servicing other than that described in the operating instructions unless you are
qualified to do so.
1. Since the Panel Module and the front Filter are made of glass, handling the broken Module and Filter
carefully and with caution in order not to receive injury.
2. Replacement work should be started after the Panel Module and the AC/DC Power supply have become
sufficiently cool.
3. Special care should be taken when working near the display area in order not to damage its surface.
4. The Panel Module should not be touched with bare hands in order to protect its surface from blemishes
and damage.
5. It is recommended that you use clean soft gloves during the replacement work in order to protect not only
the display area of the Panel Module but also yourself.
1.
Features.................................3
2.
...........................4
3.
4. Side Inputs..............................10
5. Remote Control........................11
Caution
Service Warning
Contents
.....................9
1
6.
.............................13
7.
.................................14
8. T
..........................20

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Summary of Contents for Toshiba 40L2546

  • Page 1: Table Of Contents

    40_50L2546/56 Service manual Caution Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful radiation and materials, various measures are provided in this LCD Television. Be sure to read cautionary items described in the manual before servicing. These servicing instructions are for use by qualified service personnel only.
  • Page 2 CAUTION FOR SAFETY Please read this page before repair the monitor. The following safety precautions are designed to help you stay safe and prevent accidents during the repair work. Please take note of these cautionary flags. Warning This means "Potential to sustain injury or even death." Caution This means "Potential to sustain breakage or irreparable damage."...
  • Page 3: Features

    PRECAUTIONS Cleaning the LCD panel of the television Please make sure to unplug the power cord before cleaning the television. ● Wipe the panel with a lint-free and dry cloth in order to prevent damage to the panel surface. ● Do not use a chemical cloth or cleaner. Depending on the ingredients, it may cause discoloration and damage the panel surface.
  • Page 4: Specifications

    2. Specifications 40L2546/56 50L2546/56 SPECIFICATION Display dimensions 878.112 (H) x 485.352 (V) mm 1095.84 (H) x 616.41 (V) mm Panel Resolution 1920(H) x 1080 (V) pixels 1920(H) x 1080 (V) pixels including Stand: 904 (W) x 567 (H) x including Stand: 1122 (W) x 701(H) x...
  • Page 5 Video support timing PAL 50/60Hz Composite Video SECAM NTSC 480i / 480p / 720p / 1080i (60Hz) Component Video 576i / 576p / 720p / 1080i (50Hz) VGA (640 x 480) (60Hz) S-VGA (800 x 600) (60Hz) XGA (1024 x 768) (60Hz) W-XGA (1280 x 768) (60Hz) PC Input (D-Sub) W-XGA (1280 x 800) (60Hz)
  • Page 6 PC/HDMI timing table SYNC PIXEL SYNC BACK FREQ PERIOD Display POLARITY CLOCK WIDTH PORCH Mode LINE (pixel) LINE (pixel) LINE(kHz) LINE (pixel) LINE LINE (pixel) (MHz) FRAME FRAME FRAME(Hz) FIELD(lines) FIELD FRAME(lines) (lines) (lines) 31.469 Negative 25.175 VGA 60Hz 59.941 Negative 640x480 37.879...
  • Page 7 HDMI Video timing table SYNC PIXEL SYNC BACK FREQ FREQ PERIOD Display POLARITY CLOCK WIDTH PORCH LINE (pixel) LINE (pixel) LINE (pixel) LINE(kHz) LINE (pixel) LINE MODE (MHz) FRAME FRAME FRAME FRAME(Hz) FIELD(lines) FIELD (lines) (lines) (lines) 15.734 1716 Negative 1440 59.94Hz 1440x480i 59.94...
  • Page 8 1125 Positive 1080 Component timing table SYNC PIXEL SYNC BACK FREQ PERIOD Display POLARITY CLOCK WIDTH PORCH MODE LINE(kHz) LINE (pixel) LINE (pixel) LINE (pixel) LINE (pixel) LINE FRAME FIELD (MHz) FRAME FRAME FRAME FIELD (Hz) (lines) (lines) (lines) (lines) 15.734 Negative 13.5...
  • Page 9: Component Names

    Component names Product Outward Back: Front:...
  • Page 10: Side Inputs

    2. Side inputs Remote sensor (embedded) — Point the remote control toward this remote sensor. Power LED — Power indicator light, (glows green when the TV power is On & red when TV power is Off ). POWER button — Turns the TV On/Off.
  • Page 11: Remote Control

    3. Remote Control The buttons used for operating the TV only are described here. Learning about the remote control The buttons used for operating the TV are described here. (Sample Illustration) Remote control overview NOTE The error message “NOT AVAILABLE” may appear if you press a button for a function that is not available.
  • Page 12: Service Points

    4. Service points...
  • Page 13 Lead-free solder This product uses lead-free solder (unleaded) to help protect the environment. Please read these instructions before attempting any soldering work. Caution: Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead-free solder can splatter at high temperatures (600 ). Lead-free solder indicator Printed circuit boards using lead-free solder are engraved with an "F."...
  • Page 14: Adjustment

    ENTER key in remote control to enter into factory mode. 5-2 Syetem Information Please check below red color area: 50L2556: Toshiba model name Model name list : SRO40D (40L2546/40L2556) SRO50D (50L2546/50L2556) SRO40D : COMPAL Model name 00.16.20 : F/W version.
  • Page 15 5-3 Color Temperature Adjustment Set the signal generator to RGB, 1024*768, 60HZ(ASTRO-859: PG1 856), Level:178 (70% ). Full white pattern. (2) Press up or down key of remote control to select “Cool”, Press ENTER key to enter the item. R, G, B drive values are set for COOL, Medium , and WARM independently. Color Cool Medium...
  • Page 16 5.4 Source Calibration ADC Adjustment INPUT Input signal SOURCE Process /Instructions Remark INPUT 2 Component [Process] 100% Full field COLOR Bar signal SD 576i 1. Make TV to be in ‘M’. 2. Connect 100% Full field COLOR Bar signal (576i) to ‘Source 2 Input’. 51AE0BF4 3.
  • Page 17 INPUT Input signal SOURCE Process /Instructions Remark INPUT 1 RGB 576i/ [Process] Checker pattern 50Hz (PAL) 1. Make TV to be in ‘M’. 2. Connect checker pattern to ‘scart Input’. 51AE12ED 3. Change Video Input to scart input. 4. Start Auto adjustment by ’ 51AE14EB’ remote code sending.
  • Page 18 - press /hold Input keypad in TV side then AC on util green light flash to release Input key. 1. USB storage device support FAT32 format only. 2. Please check the file name which you want to upgrade corresponds with the format below, For DVB-T model : 40L2546.bin and 50L2546.bin For DVB-T2 model:...
  • Page 19 40L2556.bin and 50L2556.bin Save the upgrade file as X0L25Y6.bin, under the USB drive's root directory. X=4 or 5,Y=4 or 5. 3. Insert your USB storage device to the USB slot of the TV set. 4. You have 2 kind format to do F/W USB upgrade. Case1:Direct upgrade F/W no use panel Step1:PCBA connect IR/LED board ,Power supply unit and insert USB in port.
  • Page 20 Step 2 Press remote control “Menu ”key and select “Installation” page Control remote down key to find Software Update (USB) icon and Press “OK” key. Step 3: Screan will show message “Do you want to upgrade software?” Please Press “Left Key” and start to upgrade. Step 4: TV will show “SOFTWARE UPGRADE COMPLETE”...
  • Page 21 Step 8:To show the imformation, click "OK"...
  • Page 22: Troubleshooting

    6. Troubleshooting The flow chart shown below will help you to troubleshoot your Televison set with it doesn’t display normally. Each procedure offers a simple way to check for system errors. Before starting, ensure that there is a signal in and that the Televison is turned on.
  • Page 23 Have a video but no sound heck M/B wire Re-plug in connect CN7 plug Re-plug wire/ Check Speaker Change new Speaker Connect Assy Change new Power board Check M/B CN 9, 40”: PK101W0810I pin 6=12.5V 50”:PK101W0800I/PK101W0820I Change new main board...
  • Page 24 Have a Audio but no Video heck Backlight Check Wire assy CN9 Pin 13 need Check LVDS Wire Check M/B CN8 assy/change new LVDS LVDS connect wire Change new Power board Check M/B U13/ 40”: PK101W0810I FB17=12~12.5V 50”:PK101W0800I/PK101W0820 Change new main board Change LCD Module...

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