Samsung LE32C650L1W - 4-1. No Power Troubleshooting

4-2
4. Troubleshooting
4-1-1. No Power
Symptom
The LEDs on the front panel do not work when connecting the power cord. -
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. -
Diagnostics
3
Please, Contact tech support.
Yes
Check Power of ‘T-con b’d’.
- L9(T-CON) : VCC12
- TP_VCC33 : VCC33
No
Change the T-con B’d.
Power indicator LED is on?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Check a connetion power code.
Check the backlight on,
when 18p cable unconnected ?
No
Check Output of ‘Stand-By Power IC’ ?
- Pin#3 of IC202 : A3.3V
No
Check Input power of ‘T-con b’d’
- F1(T-CON) : B13V
No
Change 18p cable.
Change Main Power Assy.
Change the Main Assy.
Reconnect or Change the LVDS
cable.
No
Check ‘Stand-By 5V’ ?
- BD206 : A5V
1
No
Check ‘Main power input’ ?
- BD204 : B12VS
- BD201: B13V
- BD207 : B5V
1
No
Check Output of ‘Power IC’ ?
- L201 : B3.3V
- L202 : B1.2V
- L204 : VAL_1.1V
- L203 : DDR_1.8V
2
1
3
Caution
Make sure to disconnect the power before working on the IP board.