Samsung G5K32ASA Service Manual page 51

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4-1-1. No Power
Symptom
Major
checkpoints
Diagnostics
Caution
The LEDs on the front panel do not work when connecting the power cord.
-
The IP BOARD relay does not work when connecting the power cord.
-
The units appears to be dead.
-
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 IP BOARD 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 IP BOARD.
-
Replace the Main Board.
-
Lamp(Backlight) Off, power indicator
LED on?
Yes
Check the backlight on,
when 30p cable unconnected.
Yes
Does proper Stand-By DC
A5V appear at BD1003?
Yes
Does proper Main DC B13VS,
B13V, B5V appear at BD1006,
BD1004, BD1005?
Yes
Does proper DC A3.3V
appear at R1003?
Yes
Does proper DC B3.3VD, B9V,
B1.25VD, B1.8V appear
at R1030, R1101, BD1010, R1105?
Yes
Does proper DC B12V
appear at F1 of T-con b'd?
Yes
Does proper DC B1.25V, B3.3VD
appear at BD8005, BD8004 of
T-con b'd?
Yes
Does proper VCC18, VCC33 appear at
BT7, BT8 of T-con b'd?
Make sure to disconnect the power before working on the IP board.
Published in Heiloo, Holland.
No
Check a connetion power code.
No
Change 30p cable
32" : BN39-01099H
40" 46" 52" : BN39-01099K or
Change Main Power Assy
No
32" : BN44-00261B
40" : BN44-00264C
46" : BN44-00265A
No
52" : BN44-00267B
No
Change the Main Assy
BN94-02709A
No
Change the LVDS cable
32" : BN96-10077A
No
40" : BN96-10075A
46" : BN96-10075A
52" : BN96-10074A
No
Change the T-con b'd
No
Check a other function
(No picture part)
11/8/15
4. Troubleshooting
4-5