Samsung UN43TU8000F, Руководство по обслуживанию

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TV POWER ON SEQUENCE TEST :
Simplified Version
1. Verify Standby Light
9
If missing perform Standby Test / Function Test
2. Power TV On
9
Check Standby LED changes and TV Powers On
3. If Standby light won’t change (turn off or flash)
9
Check with both Remote & Function Control Power command
9
Check Power On/Off changes from 0Vdc (off) to 3.3Vdc (on)
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If OK Replace Main Board
4. If Standby LED Flashes and TV won’t power on
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Disconnect Panel Cables from Main Board
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Power TV On
9
Check TV Powers On (Audio – No video)
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If TV now Powers On
5. Verify Backlight Turns On
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If No Backlight
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Perform Backlight Test
Extended Version
1. Power TV On
9
Power On/off (pin 8 ) .2Vdc (when off) changes to 3.3Vdc (on)
NOTE
• There is a delay from PS-ON to off condition when the TV is powered off.
2. If voltage error or no change:
9
Check Jog Function Control Test
3. If OK replace Main Board.
9
Check All A13V supplies (12.7VDC) (pins 3 5 7 9 )
4. If any wrong voltages, remove SMPS connector to Main Board
9
Check A13V again (12.7VDC) (pins 3 5 7 9 )
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If voltages are now OK replace the Main Board
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If voltages are still wrong replace SMPS
5. Verify Backlight Turns On in Normal TV Operation Mode
• If No Backlight
9
Check BLU_PWM (pins 6 ) Backlight On/Off & Dim Control: for approx. 0 (Off) to approx. 2.5Vdc (On) depending
on backlight dimming level.
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If missing/Error replace Main Board
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If OK perform backlight test
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4. Troubleshooting