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9. Abnormal Picture
9-1. Horizontal Size
DC level of the
base of Q517
changeable?
collector pulse
=1100Vp-p
of Q505 correct?
cathode waveform
of D509 correct?
50-250Vpp
Trouble in H.OSC/
Deflection Circuit
Refer to Horizontal Output Circuit
Abnormal
H.Size
Is the
No
Yes
Is the
Yes
Is the
Yes
* At first, adjust controls in the OSD Menu
Is the
DC level of pin 11
with the IC501
changeable?
No
Check the IC501 and
its ambient circuit
No
Trouble in Horizontal
output Circuit
Check the B+ and
anode voltage of CRT
No
Trouble in L503,
C543 or their ambient
Circuit
24
Check the Q515,
Yes
Q516 and its
ambient circuit
* Normally anode voltage
of CRT is approximately,
24KV
* Scan B+ are as follow :
MODE
B+ Voltage
VGA
73.2V dc
54KHz
117.4V dc
68KHz
148.9V dc
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