Trouble shooting Chart
Power on led doesn't work
power on led doesn't work
GO
Switch
performance
check
OK
Check the c able XS603 is
connect well to po wer board
CN501
change switch
NG
Reconnect the cable
NG
Refer to Power supply board part
NG
Check+5V,+12V,+5VSTB
voltage on the power and
front board
OK
OK
Replace the LED610,LED611
Check the po wer on led
control circuit is OK
Replace the FB
NG
OK
harman/kardon
BDS 270 + 570 Service Manual
Page 36 of 90