Harman Kardon BDS 570 Service Manual ▷ View online
Trouble shooting Chart
No display on VFD
No display on VFD
Go
Check every supply
voltage on AM board is
normal
voltage on AM board is
normal
Yes
Check+5V,+12V,+5VSTB
voltage on the power and
front board
voltage on the power and
front board
Refer to Power supply board part
No
Fix the connection XS603 on front board
and CN501 on power board, and 20pin
FFC cable from FB to AM board
and CN501 on power board, and 20pin
FFC cable from FB to AM board
No
Replace U721 on AM board, or replace
the AM board
the AM board
No
Check the U601 pin 31,32,34 arrive the
condition XP808 13,1 0,9
condition XP808 13,1 0,9
No
Check the pow er key is
working normally
Yes
Yes
Yes
Check the front bo ard
signals
signals
VDIN,VCLK,
VSTB
1.Check
whether
bad
solder exists on pi ns of
VFD,
VFD,
Correct connection
No
Yes
Replace VFD or FB
harman/kardon
BDS 270 + 570 Service Manual
Page 37 of 90
Trouble shooting Chart
Remote control does not work
Remote control
does not work
does not work
Go
Check whether the remote
controller’s
controller’s
battery
is
exhausted or not.
No
Replace the battery for remote
controller
controller
Check the 2pi n FFC cable
from AM to BD board is
connect wenll
from AM to BD board is
connect wenll
Yes
Reconnect the cable
No
Yes
Replace IR1
Check the IR60 1 power
supply is OK, IR1’3 is about
3.3V
supply is OK, IR1’3 is about
3.3V
Check the +3.3V net on front board
No
Yes
harman/kardon
BDS 270 + 570 Service Manual
Page 38 of 90
Trouble shooting Chart
Can’t read disc or can’t eject
Yes
Check the co nnection 4pin cable from the
BD board
BD board
Can’t read disc or can’t
eject
eject
Check 45pin and 5pin
cable from BD board
connection to the l oader is
cable from BD board
connection to the l oader is
normal
Replace the loader
NO
GO
Check whether the
DVD loader running is
normal
DVD loader running is
normal
Fix the c onnection the 45pin cable
and 5pin cable
and 5pin cable
NO
Yes
harman/kardon
BDS 270 + 570 Service Manual
Page 39 of 90
Trouble shooting Chart
5.1/2.1 channel no audio output
Reconnect well
check the system weather is
ear mode or not, pull out the
4pin cable XS601 from FB to
AM board XP806
ear mode or not, pull out the
4pin cable XS601 from FB to
AM board XP806
Replace the FB board
Yes
No
Go
Check the 10pin/4pin cable is
connect well from AM to JC
board
connect well from AM to JC
board
5.1/2.1 channel no audio
output
output
Yes
Replace the AM board
No
Check +32V at XP702 on
AM board is OK
AM board is OK
Yes
Refer to Power supply board
Check XP701 is short
to GND
No
Replace the AM board
Yes
No
harman/kardon
BDS 270 + 570 Service Manual
Page 40 of 90
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