Service manual

20
5. Horizontal Output Circuit
Is the
B+ line voltage
normal?
Is Q505 base
waveform
normal?
Refer to abnormal H.Size.
Trouble in Q505.
Trouble in Horizontal
output circuit
(No Raster)
Yes
No
Is the Collector
waveform of
Q502 or Q503
normal?
NO
Trouble in Q502, Q503.
Trouble in Q504, T506.
Yes
NO
Yes
NO
Yes
NO
Yes
Trouble in H.Sync
13Vpp
12V
12Vpp
0.7V
0.2V
Is IC501 pin17
H.OSC waveform
normal?
Is IC501pin16
voltage about
12V?
Yes
Trouble in IC501.
Trouble in Power Supply Unit.
No
Is
the input H.Sync
correct?