Samsung UE D65 V Series Service Manual page 42

4. Troubleshooting
4-1-2. How to check fault symptom
No Power
„
Genoa-S
N Refer to the next page to check the lacation such a CN201 or IC1001 SVC Manual mentioned.
The LEDs on The front panel do not work when connecting The power cord.
-
Symptom The SMPS relay does not work when connecting The power cord.
-
The units appears to be dead.
-
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.
Major
-
checkpoints
Check the fuses of each part.
-
Check the output voltage of SMPS.
-
Replace the Main Board.
-
Caution Make sure to disconnect the power before working on the PD board.
When power on, check the sound of relay on?
Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
4-4
Yes
Check the backlight on,
when 20p cable unconnected ?
Yes
Does proper Stand-By DC A5V
appear at the PIN 4 of CN201?
Yes
Check 'Main power input' ?
- PIN7 : B18VS
- PIN11 : B13V
- PIN1 : B5V
Yes
Does proper DC A3.3V
appear at the pin3 of IC204?
Yes
Does proper DC B3.3V
appear at the pin8 of IC201?
Yes
Does proper Genoa-S core 3.3V, 1.1V
appear at C1002, C1032?
Yes
A power is supplied to panel
appear at the pin7,8 of IC210?
No
check a connection power cable.
No
No
Change 20p cable.
Change Main Power Assy.
No
No
Change the IC204 or the Main Assy.
Change the IC208, IC207 or
No
the Main Assy.
Change the IC208, IC207 or
No
the Main Assy.
Check a other function.
No
Replace a LCD Panel