4-6

No display on LEDD, and buttons do not work
No
No
No
Yes
Yes
No display on LED, and
buttons do not work
Check whether there is
correct contact
between CON301 and
CN5

Correct connection

Fix power supply board top a power
su
pp
l
y
for should electric circuit
Check the U2’s pin 97ˈ98ˈ100
arrive the CN5 connect condition
Correct connection
Replace U301 or LED
Yes
Yes
Yes
No
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.
CN5 (PIN 2 V.SCK) CN5 (PIN4 VSDA0)
Trouble shooting chart

Remark: Troubleshooting chart for

DVP3160K/XX