Daewoo 103FH Service Manual Page 24

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22
6-2. V.OSC/Deflection Circuit
Unstable or
Abnormal picture
Is
+17Vdc, -13Vdc line
correct?
1. Trouble in P.S.U.
2. Check the D108(-13Vdc),
Q106(+17Vdc) and
their ambient circuit.
No
Yes
Is
the output
waveform of IC401
(pin 5) normal?
V.DY
failure.
Trouble in V.Sync line
or IC501 failure.
Yes
No
Is the
output pulse
of IC501 (pin 8)
normal?
Trouble in IC401 or
its ambient circuit.
Yes
6V
4V
0
No
50Vpp
6Vpp
0
8Vpp
106KHz/85Hz
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