Philips BDP2500 Service Manual page 12

No display on VFD, and buttons do Not work
No display on VFD, and
buttons do Not work
Check
voltage on main board is
Normal
Check5V,+12V,-12V
voltage on the power
and front board
Check the front board
signalsVSTB VCLK, VD
1.Check whether bad solder exists
on the front board U4 and pins of
VFD
2.Check
connected to K1, K2, K3, K4, K5,
K6 is broken.
Replace U4 or VFD
Yes
every supply
Yes
Yes
Yes
whether the circuit
Yes
5-1
No
Refer to Power supply board part
No
Fix the connection JP1 on front board
and CN504 on power board
Check the main board U107's pin
AE4,AD5,AE5
No
board U4's pin 6,8,9 connect
condition
No
Correct connection
Trouble shooting chart
arrive the front