Samsung LE32C53 Series, Service Manual

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4-2
4. Troubleshooting
4-1-2. No Power
Symptom
The LEDs on the front panel do not work when connecting the power cord.
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The SMPS relay does not work when connecting the power cord.
-
The units appears to be dead.
-
Major
checkpoints
The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are
improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
Check the internal cable connection status inside the unit.
-
Check the fuses of each part.
-
Check the output voltage of SMPS.
-
Replace the Main Board.
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Diagnostics
Lamp(Backlight) Off,
power indicator LED off?
Lamp(Backlight) Off,
power indicator LED on?
Does proper DC B13V appear at
LVDS connector Pin #1~5 of T-con b’d?
Does proper DC B13V appear at
F1 of T-con b’d?
A power is supplied to set?
Does proper Stand-By DC A5V
appear at TP - A5V1?
Does proper Main DC B13V, B5V
appear at TP - B13V1, B5V2?
Does proper DC A3.3V appear at
TP - A3.3V1?
Does proper B3.3V, B1.8V, SPI_3.3V
appear at TP - B3.3V1, B1.8V1, SPI_A3.3 ?
Change the 18p power cable.
Change INVERTER/BALANCE B’D.
Change the LVDS cable.
Change the T-con b’d.
Check a other function.(No picture part)
Replace a LCD Panel.
Change the Main Assy.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
Caution Make sure to disconnect the power before working on the IP board.