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9. Abnormal Picture
9.1 Horizontal Size
Abnormal
H.Size
Is
changeable the
DC level of the base
of Q500?
ft
=1000Vp-p
Is the
collector pulse
of Q502 correct?
No
Is the
| | |
cathode waveform
of D502, D507
50-250Vpp
correct?
No
Trouble in H.OSC/
Deflection Circuit
changeable the
DC level of pin 3 of
Is
and its
the 1C203?
Check the 1C201 and
its ambient circuit
Trouble in Horizontal
output circuit
Check the B+ and
anode voltage of CRT.
26KV
Trouble in L501,
Q505, C515 or
MODE (KHz)
VGA(31.5 KHz)
Super VGA (37.8)
VESA SVGA(48)
XGA(56)
Hi=64KHz
their ambient
circuit
19
Check the IC203
ambient circuit
* Normally anode voltage
of CRT is approximately,
* The B+ are as follow :
T2 Voltage
134.4V
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