Harman Kardon BDS 280 (serv.man6) Service Manual ▷ View online
5-10 Trouble shooting Chart
COAX/OPTICAL does not work
COAX/OPTICAL
does not work
does not work
Go
Check the D VD mode is
OK,audio output is ok
No
Replace the Main board
Check the coax/optical
connector is ok
Yes
Replace the connector
No
Yes
Replace U23 CS8422
Check U23 CS8422
is broken.
is broken.
Check the U28
No
Yes
Check
U23
PIN3,PIN22 +3.3V
Yes
Check the main board U23
power supply circuit
power supply circuit
No
Harman Kardon
BDS 280 + 580 Service Manual
Page 33 of 87
5-11 Trouble shooting Chart
Fan can not rotate
HDMI input does not output
FAN can not rotate
Check the voltage
of FAN
Go
Check the F AN
power supply circuit
No
OK
Replace a new fan
HDMI input does
not output
not output
Go
Check the D VD mode is
OK,HDMI output is ok
OK,HDMI output is ok
No
Replace the Main board
Yes
Replace U27 Sil9573
check connector is HDMI IN 1,
AND SET HDMI IN 1 INPUT,
Correct connection
No
OK
OK
Harman Kardon
BDS 280 + 580 Service Manual
Page 34 of 87
5-12 Trouble shooting Chart
WIFI or Airplay does not work
WIFI or Airplay do es not
work
work
Check the WIFI module
and antenna is OK
and antenna is OK
Go
Replace the WIFI
Module or antenna
Module or antenna
OK
Check the Airplay
module and antenna is
OK
module and antenna is
OK
Replace the Airplay
Module or antenna
Module or antenna
OK
Replace the Main board
NO
NO
Harman Kardon
BDS 280 + 580 Service Manual
Page 35 of 87
5-13 Trouble shooting Chart
BT does not work
BT does not work
Check the BT antenna
is OK
is OK
Go
Replace
the
BT
antenna
OK
Check the FB board is
OK
OK
Replace
the FB
Board
OK
Replace the Main board
NO
NO
Check the 24pin FFC
with connect Main
Board to FB board is
OK
with connect Main
Board to FB board is
OK
Replace the 24pin
FFC
FFC
NO
OK
Harman Kardon
BDS 280 + 580 Service Manual
Page 36 of 87
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