TROUBLESHOOTING GUIDE
E-4
NO VERTICAL
Is the waveform at pin
6 of CP401 normal ?
Yes
No
Check DY.
Is the waveform at pin
5 of IC401 normal ?
Yes
No
Check the circuit from pin 5 of
IC401 to CP401.
Is the waveform at pin 7
of IC401 normal ?
Yes
No
Is the waveform at pin
2 of IC401 normal ?
Yes
No
Check IC401 and check
associated circuit.
Check the 25V line.
Is the waveform at pin
38 of IC101 normal ?
No
Yes
Check the associated circuit of IC101.
Check the circuit from pin 38 of
IC101 to pin 7 of IC401.
