Daewoo 529B, Руководство по обслуживанию

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