Durabrand DTV1307 Service Manual page 22

NO VERTICAL
Is the waveform at pin
5 of CP401 normal ?
No
Is the waveform at pin
5 of IC401 normal ?
No
Is the waveform at pin 7
of IC401 normal ?
No
Is the waveform at pin
37 of IC102 normal ?
No
Check the associated circuit of IC102.
TROUBLESHOOTING GUIDE
Yes
Yes
Yes
Is the voltage at pins2
and 6 of IC401 25V ?
Check the 25V line.
Yes
E-4
Yes
No
Check DY.
Check the circuit from pin 5 of
IC401 to CP401.
Check IC401 and check associated
circuit.
Check the circuit from pin 37 of
IC102 to pin 7 of IC401.