TROUBLESHOOTING GUIDE
ONLY A LINE APPEARS
Yes
No
No
Yes
No
Yes
No
Check pin 36 of IC101 and the
peripheral circuit.
Yes
No
Yes
Check pins 18, 19 and 20 of
IC601 and the peripheral circuit.
Check peripheral circuit of IC601.
Check peripheral circuit of IC101.
Check R452 and FB401.
Is the normal signal at
pin 4 of IC 401 input ?
Is the normal signal at
pin 38 of IC101 output ?
Is the voltage at pin 6 of
IC402 DC25V ?
Check peripheral circuit of IC402
and DY401.
OSD SCREEN DOES NOT APPEAR
Is there a waveform at
pins 18, 19 and 20 of
IC601 ?
Check peripheral circuit of IC601.
Is there a waveform at pins
33, 34 and 35 of IC101 ?
E-6
