Samsung DVD-R155 Service Manual page 31

Tuner Audio Out Abnormal
TTM1 pin15 of is OK?
TTM1(Jack PCB) is OK?
If VIC1 is normal, refer to
audio line in abnomal
Samsung Electronics
Yes
Supplied power
(Pin 33 : about 9V)
Yes
Is ther signals
in pin16 & pin18 of
MCN2?
Yes
No
Connect tuner line to TV directly.
No
Check its power line or around elements
No
Replace Main Assy
Tuner Audio (pin28 & pin29 of MCN2 of Jack Assy)
Trouble Shooting
5-9