4-2

Trouble shooting chart

The power can not be on or off

The power can’t be

on or off

Go

Check the power supply

No

on the power board is

 

normal.

 

Yes

 

Repair the power board

Check if the XS301 on the front board to XP82 on the decoder board is in good contact.

Yes

Whether the connection to K303 is broken.

Yes

Whether there is 0V and 3.3V voltage difference on Pin 95 PCON of U1.

Yes

No

No

No

Check/Correct connection

Correct the connection

Replace U1.

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Image 18
Philips DVP3879, DVP3893, DVP3855, DVP3896, DVP3898, DVP3800 service manual Power can not be on or off