Samsung DVD-R157 Service Manual page 32

Trouble Shooting
Component output error
Jack PCB or CON2 of Main PCB
About 1V pk-pk appears at
Y_out (Pin6 of Main CON2
5-8
Pin2/4/6 in CN3 of
has * normal level?
Yes
Analog signals
are Inputted normally
VIC1(pin6/8/9)
Yes
Power is
Normal(5v) at
VIC1(pin1)?
Yes
Pin13 in VIC1 is
In high state?
Yes
Video signal of
Output Jack?
Yes
Check the RCA cable
Pin6 of Jack CN3)
No
Check the DIC1 on MAIN B/D.
Check the connection between
No
Pin2/4/6 in CN3 Of JACK PCB
and VIC1(pin6/8/9)
No
Check the connection between
VIC1[pin1] and Power line (PPLI1,PPII1).
Check the connection between
No
VIC1(PIN3) and IC601(PIN89).
Check VIC1 peripheral circuit.
No
Check the connection between
VIC1 and output jack.
# Nomal level
: pin 6 is 1Vpk-pk
pin 2/4 is + 0.35V
Pb_out (Pin4 of Main CON2
Pin4 of Jack CN3)
Pb_out (Pin2 of Main CON2
Pin2 of Jack CN3)
Samsung Electronics