Toshiba 40L2546 Service Manual Download | Manualshive

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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.

NG

Inspect Assy Cable wire

conect

OK

IR/LED board NO light

NG

Change Main board

OK

Change new IR/LED board

Check IR/LED

board Assy

Check CN14

pin4,5 >2.5V

Check CN14

Pin2 :3.3V-ST

NG

2

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Summary of Contents for 40L2546

Page 1: ...ss 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 su...

Page 2: ...riginal conditions in order to prevent electric shock or fire 2 Perform safety check when done Exercise caution while working on the device as the Monitor contains high voltage parts and power supply It is possible to sustain severe injury or death if you accidentally touch the wrong parts You must disconnect the power supply while servicing reassembling or change parts If you touch a live connect...

Page 3: ... volatile solutions such as insecticide over the cabinet Do not leave the cabinet in prolonged contact with plastic or rubber materials Do not use a chemical cloth cleaner or wax Depending on the ingredients it may cause crack and deformation Use a lint free cloth to clean the cabinet and control panel of the television In case of the heavy dirt wipe with a soft cloth moistened by a diluted neutra...

Page 4: ...o 90 Operating 20 to 80 Storage 5 to 90 AC 110 240V 10 50 60Hz 3Hz Power supply AC 110 240V 10 50 60Hz 3Hz Power consumption in standby mode 0 4W 0 4W 7W 7W Audio output 7W 7W VIDEO input Input terminals SCART Full RGB output Component Y incluse composite video input terminal RCA L R audio input terminal RCA HDMI 1 2 HDMI input terminal Output signals Headphone output Socket 3 5mm Optical output S...

Page 5: ...Hz W XGA 1280 x 768 60Hz W XGA 1280 x 800 60Hz PC Input D Sub W XGA 1360 x 768 60Hz W XGA 1440 x 900 60Hz S XGA 1280 x 1024 60Hz 480i 60Hz 576i 50Hz 480p 60Hz 576p 50Hz 720p 24 30 50 60Hz 1080i 60Hz 1080i 50Hz HDMI Video Format 1080p 24 30 50 60Hz VGA 640 x 480 60Hz SVGA 800 x 600 60Hz XGA 1024 x 768 60Hz WXGA 1280 x 768 60Hz HDMI PC Format WXGA 1360 x 768 60Hz SXGA 1280 x 1024 60Hz 5 ...

Page 6: ...00 60 317 628 Positive 600 4 23 XGA 60Hz 48 363 1344 Negative 65 1024 136 160 1024x768 60 004 806 Negative 768 6 29 WXGA 60Hz 47 396 1440 Positive 68 25 1280 32 80 1280x768 59 995 790 Negative 768 7 12 WXGA 60Hz 47 776 1664 Negative 79 5 1280 128 192 1280x768 59 87 798 Positive 768 7 20 WXGA 60Hz 63 981 1688 Positive 108 1280 112 248 1280x1024 60 02 1066 Positive 1024 3 38 WXGA 60Hz 47 712 1792 Po...

Page 7: ...0 Positive 74 175 1280 40 59 939 750 Positive 720 5 20 220 60Hz 1280x720P 45 1650 Positive 74 25 1280 40 60 750 Positive 720 5 20 220 50Hz 1280x720P 37 5 1980 Positive 74 25 1280 40 60 750 Positive 720 5 20 148 59 94Hz 1920X1080i 33 716 2200 Positive 74 175 1920 44 15 59 94 562 5 Positive 540 5 148 60Hz 1920X1080i 33 75 2200 Positive 74 25 1920 44 60 562 5 Positive 540 5 15 148 50Hz 1920X1080i 28 ...

Page 8: ...gative 27 720 63 59 59 94Hz 720x483P 59 94 525 Negative 483 6 30 31 25 864 Negative 27 720 63 69 50Hz 720x576P 50 625 Negative 576 5 39 44 96 1650 Positive 74 176 1280 40 220 59 94Hz 1280x720P 59 94 750 Positive 720 5 20 45 1650 Positive 74 25 1280 40 220 60Hz 1280x720P 60 750 Positive 720 5 20 37 5 1920 Positive 74 25 1280 40 220 50Hz 1280x720P 50 750 Positive 720 5 20 33 72 2200 Positive 74 176 ...

Page 9: ...3 Component names Product Outward Back S2 Front 9 ...

Page 10: ...lume level or change the source you are viewing the setting mode depends on the SELECT z SELECT Select the Channel Volume or Source mode for the ARROWS z 2 HDMIIN High Definition Multimedia Interface input z USB port Accesses JPEG or MP3 or Movie files or updates TV firmware z SCART COMPONENT VIDEO AUDIO High resolution component video input and shared composite video input see Connecting a Blu ra...

Page 11: ...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 1 ...

Page 12: ...4 Service points 1 ...

Page 13: ...ove all lead free solder from soldered joints when replacing components z If leaded solder should be added to existing lead free joints mix in the leaded solder thoroughly after the lead free solder has been completely melted do not apply the soldering iron without solder Servicing soldering iron A soldering iron with a temperature setting capability temperature control function is recommended The...

Page 14: ... 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 Feb 6 2015 10 10 39 F W release time PQ FW Picture Qunaty FW version AQ FW Audio FW version 1 ...

Page 15: ...efault value Increase Blue drive from default value 3 If the x or y or both x and y value is are smaller than specification Increase Red drive from default value Decrease Blue drive from default value 4 According to a x and y value please following adjustment of 4 1 or 4 2 4 1 If x value is higher than spec Decrase Red drive from default value 4 2 If y value is higher than spec Increase Blue drive...

Page 16: ...80i 50hz Process 1 Make TV to be in M 2 Connect 100 Full field COLOR Bar signal HD 1080i 50hz to Source 2 Input 51AE0BF4 3 Start Auto adjustment by 51AE14EB remote code sending OSD INDICATION During Adjustment A D ADJUSTING After Finish adjusting OK Adjustment succeeds NG Adjustment fails 100 Full field COLOR Bar signal 3 PC 1024 768 60hz Process 1 Make TV to be in M 2 Connect White Pattern signal...

Page 17: ...ting OK Adjustment succeeds NG Adjustment fails Checker pattern Please press Right Exit OK Key to Engineer mode Check ADC all status is Pass 5 5 Prset Channel Select OSD as factory locate This Function will auto setup preset channel in TV set 5 6 NVRAM CLEAR Clean all PCBA data include color temperature Source calibration preset channel Please don t use this mode for factory side 5 7 Timer Clear R...

Page 18: ...del name check not same TV model name will reject this upgrade 3 From out side Input keypad upgrade If don t care the model name mechanism whether exist change the bin file of model name to MstarUpgrade bin press hold Input keypad in TV side then AC on util green light flash to release Input key ex 1 1 USB storage device support FAT32 format only 2 Please check the file name which you want to upgr...

Page 19: ...in port Step2 Press side Key Input S4 loacate and AC Power ON Step 3 Waiting LED flash than can put off S4 key TV will auto ruuning F W upgrade Step 4 During FW Upgrade Green color LED will Flashing continuous Step 5 When FW Upgrade complete Green color LED will auto turn off about 12 15 sec than auto turn on Step 6 Change next PCBA and follow Step 2 5 Case2 Follow below Step by step operator OSD ...

Page 20: ...start to upgrade Step 4 TV will show SOFTWARE UPGRADE COMPLETE message on screen Step 5 TV is restarted when the update process finished Step 6 After restarted press and EXIT then OK key Entry to Factory Mode Confirm Model ID FW version Mboot version and date Step 7 To Check New FW version Press MENU key then using or key until Setup page shows on the screen 2 Press or key unitl you find System In...

Page 21: ...Step 8 To show the imformation click OK 2 ...

Page 22: ...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 NG Inspect Assy Cable wire conect OK IR LED board NO light NG Change Main board OK Change new IR LED board Check IR LED board Assy Check CN14 pin4 5 2 5V Check CN14 Pin2 3 3V ST NG 2 ...

Page 23: ...but no sound Check M B wire connect CN7 plug NG Re plug wire Change new Speaker OK OK NG Change new Power board 40 PK101W0810I 50 PK101W0800I PK101W0820I Check M B CN 9 pin 6 12 5V Check Speaker Connect Assy Change new main board 2 ...

Page 24: ...deo Check Backlight CN9 Pin 13 need NG Check LVDS Wire assy change new LVDS wire OK OK NG Change new main board Change new Power board 40 PK101W0810I 50 PK101W0800I PK101W0820 Check M B U13 FB17 12 12 5V Check M B CN8 LVDS connect Change LCD Module ...

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