Samsung MO15E Series Service Manual page 27

4 Troubleshooting
4-2 No Video
Power indicator is green.
Does the clock pulse
1
appear at Pin 78 of IC300?
Yes
1 3 4 5
Do the sync pulses appear at Pin
27, 28, 30 and 31 of IC401?
Yes
Do the waveforms
appear at Pins 39
6 7
and 40 of IC401?
Yes
Replace LCD Panel.
4-2
Does the H-sync
No
pulse appear at
2 12
Pin 38, 39 of IC300?
Yes
Does the clock pulse
9
appear at Pin 73 of IC300?
Yes
Replace IC300.
Replace X301 or
check its related circuit.
No
Check R304, 305, 306 and 307.
No
Replace IC401 or check
its related circuit.
CONFIDENTIAL
No
Does the pulse appear
8
at Pin 8 of IC501?
No
Replace X501 or
No
check its related circuit.
Do the pulses appear
10 11
at Pin 43, 44 of IC501?
Yes
Replace IC501 or
check its related circuit.
Replace IC202(SOG) or check R207
No
and Pin 13, 15, 17, 19 of CN202.
13 14 15
Yes
MO15E*