Samsung PS-42P7HD Manuel de service télécharger pdf (Page 17)

Troubleshooting

4-2 Samsung Electronics

4-1-2 Checkpoints by Error Mode

■

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 unit appears to be dead.

Major Checklist

The SMPS 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.

- Check the fuses.

- Check the output voltages of the SMPS.

- Replace the Main Board.

Troubleshooting

Procedures

Is the AC IN socket connector and

the SMPS CN800 connected?

Insert the AC in connector and the

SMPS CN800 connector

Is the Fuse (F801S) of the SMPS

Power Input Part blown?

Replace Fuse (F801S)

Replace the SMPS

SMPS CN801

Pin 3 : STB 5V

Pin 2 PS-ON : Check to see if it is 0V

Replace the Main Board

①

②

Yes

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Samsung PS-42P7HD Manuel de service Page 17