Samsung PN15VT / VO Service Manual page 28

5-1-18 OSD Failure
Check CN102 and connector Ass'y.
IC104 Pin 5 input is right?
18
Yes
IC104 Pin 10 input is right?
19
Yes
IC104 Pin 7 and 8 inputs are right?
Yes
IC104 Pin 13, 14 and 15 inputs
are right?
Yes
IC101 Pin 18, 19 and 20
20
outputs are right?
Yes
Check and replace IC103.
Done
PN15VT/VO
PN15HT/HO
No
Check CN102 Pin 14.
No
Check CN102 Pin 8.
No
Check IC201 Pin 41 and 42.
No
Check IC104.
No
Check and replace IC101.
5 Troubleshooting
WAVEFORMS
18 2.00 V (IC104, #5)
19 2.00 V (IC104, #10)
1.00 V (IC101, #18,19,20)
20
5-11