Philips DVP3136/94 Service Manual page 18

No display on LED, and buttons do not work
No display on LED, and
buttons do not work
Check whether there is
correct
CON301 and CN5
Check VCC(+5v) voltage
on the power and front
board
Check there are CS, DATA
and CLK signals on CON301
on the front board.
1.Check whether bad solder exists on
U301 and pins of LED,
2.Check whether the circuit connected to
K302, K303, K304 and K301 is broken,
3.Check whether R300, R301 and R302
are open-circuit.
Replace U301 or LED
Yes
contact between
Yes
Yes
Yes
Yes
4-6
No
Correct connection
Fix power supply board top
No
a power supply for should
electric circuit
No
Check the U1's pin 131,132,133
arrive the CN5 connect condition
CN5 (PIN 2 CLK)
No
Correct connection
Trouble shooting chart
CN5 (PIN4 DOUT)