Philips DVP3120 Series Service Manual page 20

No display on LED, and buttons do not work
No display on LED, and
buttons do not work
Check whether there is
correct
between CON301 and
CN5
Check
voltage on the power
and front board
Check
DATA and CLK signals on
CON301 on the front
board.
1.Check whether bad solder exists
on U301 and pins of LED,
2.Check
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
Yes
VCC(+5v)
Yes
there are CS,
Yes
whether the circuit
Yes
4-10
Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55/93/98
No
Correct connection
Fix power supply board top
No
a power supply for should
electric circuit
No Check the U1's pin 92,94,95 arrive
the CN5 connect condition
CN5 (PIN 2 CLK)
No
Correct connection
Trouble shooting chart
CN5 (PIN4 DOUT)