Philips DVP3111, Service Manual

Page: 17 / 35

No display on LED, and buttons do not work
No
No
No
LED and
buttons do not work
Check whether there is
correct contact
between CON1 of front board
and J 6 of decoder board
Correct connection
Fix power supply board top
a power supply for should
electric circuit
Check the U2’s pin 33,34,40,41 arrive
the J 6 connect condition
Correct connection
Replace LED or Q1,Q2,Q3,Q4
Yes
Yes
Yes
Check DV33(+3.3V)
voltage on the power
and front board
Check whether there is 0V
or 3.3V on the signals of VPLAY,STB
CLK, DATA
Check whether the circuit
connected to LED & BUTTONS
is broken,
Trouble shooting chart
Yes
Yes
No
Check wether Q1,Q2,Q3,Q4 for 3904
&LED is broken,
5-9