Samsung DP15HS/HT Service Manual page 27

5-1-18 OSD Failure
Check CN104 and connector Ass'y.
IC104 Pin 6 input is right?
19
Yes
IC104 Pin 17 input is right?
20
Yes
IC104 Pins 7 and 8 inputs are
right?
Yes
IC104 Pins 12, 13 and 14
outputs are right?
No
IC101 Pins 21, 24 and 26
21
outputs are right?
Yes
Check and replace IC103.
Done
DP15H*/DP17L*
No
Check and replace Q102.
Check CN102 Pin 14.
No
Check and replace Q101.
Check CN102 Pin 8.
No
Check IC201 Pins 41 and 42.
No
Check and replace IC104.
No
Check and replace IC101.
5 Troubleshooting
WAVEFORMS
19 1.00 V (IC104, #6)
CH1 P-P = 1.00V CH1 RMS = 4.516V
20 1.00 V (IC104, #17)
CH1 P-P = 1.00V CH1 RMS = 5.024V
21 1.00 V (IC101, #21.24.26)
CH1 P-P = 1.00V CH1 RMS = 2.580V
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