Samsung UN40C8000XM, Руководство по обслуживанию

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4-8
4. Troubleshooting
4-1-1. No Power
Symptom
The PD board relay does not work when connecting the power cord.
-
The units appears to be dead.
-
Major
checkpoints
The PD relay does not work when connecting the power cord if the cables are improperly connected or the
Main Board or PD is not functioning. In this case, check the following:
Check the internal cable connection status inside the unit.
-
Check the fuses of each part.
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Check the output voltage of PD.
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Replace the Main Board.
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Caution Make sure to disconnect the power before working on the PD board.
Diagnostics
Does proper Main DC B18VS, B5V,
B13V appear at the PIN 3, PIN 5,
PIN13 of CN1001?
Does proper DC A3.3V appear at
the pin3 of IC1014?
Change the IC1014 or the Main Assy.
No
Yes
Does proper DC B3.3V appear at
the pin8 of IC206, B9V appear at
3pin of IC1003?
No
Yes
When power on, check the sound of
relay on?
Yes
No
check a connection power cable.
P/N : BN96-12845B
Does proper Stand-By DC A5V appear
at the PIN 4 of CN1001?
No Change the Main Power assembly.
Yes
No
Yes
Change the IC1008, IC1003 or
the Main Assy.
Does proper Valencia core
3.3V,1.1V appear at C7001,C7022?
No
Change the IC1011, IC1005 or
the Main Assy.
A power is supplied to panel
appear at C9320?
Check a other function(No picture part).
Replace a LCD Panel.
No
Yes