Horizontal Size - Daewoo 531X Service Manual

9. Abnormal Picture

9-1. Horizontal Size

of the base of Q517
collector pulse
=1100Vp-p
of Q505 correct?
cathode waveform
80-310Vpp
Trouble in H.OSC/
Deflection Circuit
Refer to Horizontal Output circuit
Abnormal
H.Size
Is
the DC level No
changeable?
Yes
Is the
Yes
Is the
of D509
correct?
Yes
* At first, adjust controls in the OSD Menu
Is
the DC level
of IC501 pin 11
changeable ?
Trouble in Horizontal
No
output circuit
Check the B+ and
anode voltage of CRT.
No
Trouble in L503,
C520 or their ambient
circuit
24
Yes Check IC501
pin 11
* Normally anode voltage
of CRT is approximately,
24.7KV
* Scan B+ are as follow :
MODE B+ Voltage
VGA 60Vdc
Super VGA 72Vdc
54KHz 110Vdc