No display on VFD, and buttons do not work
No
No
No
Yes
Yes
No display on VFD, and
buttons do not work
Check every supply
voltage on main board is
normal
Refer to Power supply board part
Check the U3’s pin 45,46,47 singal
Correct connection
Replace U3
Yes
Yes
Yes
No
Check-28V,5V,+12V
voltage on the power
and front board
Check the front board
signal VDIN,VCLK,
VSTB
ˈ
1.Check whether bad solder exists
on U2 and pins of VFD,
2.Check whether the circuit
connected to K7, K2, K3, K4, K5,
K6 is broken.
Fix the connection XP1 on front board
and CN502 on power board
Trouble shooting chart
26
harman/kardon
BDP 1 / BDP 10 Service Manual
Содержание BDP 1/120
Страница 32: ...Front Board Print layout Top side 32 harman kardon BDP 1 BDP 10 Service Manual...
Страница 33: ...Front Board Print layout Bottom side 33 harman kardon BDP 1 BDP 10 Service Manual...
Страница 34: ...IR Board Print layout Bottom side 34 harman kardon BDP 1 BDP 10 Service Manual...
Страница 35: ...Power Board Print layout Bottom side 35 harman kardon BDP 1 BDP 10 Service Manual...
Страница 36: ...Main Board Print layout Top side 7 20 36 harman kardon BDP 1 BDP 10 Service Manual...
Страница 37: ...Main Board Print layout Bottom side 37 harman kardon BDP 1 BDP 10 Service Manual...