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5. Horizontal Output Circuit
Trouble in Horizontal
output circuit
(No Raster)
MODE (KHz)
VGA (31.5KHz)
S.VGA(37.8KHz)
VESA S.VGA(48KHz)
XGA(56KHz)
Hf=64KHz
TP2 Voltage
Is
B+ line voltage
normal?
Q502 base
waveform
normal?
Trouble in power
supply circuit
Trouble in FBT
pace een
Is
Q501 Gate
waveform
normal?
Trouble in Q501, T501
about 10 seconds later
Is
IC501 12pin
H.OSC waveform
normal?
JUUL
4Vp-p
Q501 and its
ambient cirucit
IC501 pin 10
voltage about
12V?
Trouble in power
supply circuit
|
Is
the input H.Syne
correct?
Trouble in IC501.
Trouble in H.Sync
13
if the holddown circuit stops the
horizontal oscillator during the check,
turn off the power then turn on again
Refer to trouble
in power supply
unit
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