Durabrand DTV1307 Service Manual page 21

NO COLOR
Are the waveform at pins 3,
7 and 9 of J801 normal ?
No
Are the waveform at pins 3,
4 and 5 of CP802 normal ?
No
Are the waveform at
pins 47, 48 and 49 of
IC102 normal ?
No
Is the pulse of crystal
X102 normal ?
No
Change X102.
TROUBLESHOOTING GUIDE
Yes
Yes
Are the waveforms at the
Yes
input of Q801, Q802 and
Q803 normal ?
Check IC102 and associated circuit.
Yes
Check the associated circuit of IC102.
E-3
Yes
No
Defect of CRT or contact defects
of J801.
Check the output circuit and
associated circuit.
Check Q801~Q803 and
associated circuit.