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