Daewoo 531X Service Manual page 21

5. Horizontal Output Circuit
MODE B+ Voltage
VGA 60Vdc
Super VGA 72Vdc
54KHz 110Vdc
50V
0V
70V
0V
Trouble in Horizontal
output circuit
(No Raster
Is the
B+line voltage
over 50V?
Yes
3V Is the H-out
waveform of IC501
0V
normal?
Yes
Is the Collector
wave form of
Q504 normal?
Yes
Is the Drain
waveform of
Q507 normal?
Yes
Trouble in Q505 and
its ambient circuit.
No
Trouble in 50V
No
Trouble in IC501
No
Trouble in Q505
No
Trouble in Q506
19