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
Summary of Contents for 103FH
Page 35: ...33 PCB LAYOUT Main PCB Component Side...
Page 36: ...34 Main PCB Solder Side...
Page 37: ...35 Video PCB Component Side...
Page 38: ...36 Video PCB Solder Side...
Page 39: ...37 Control PCB Component Side Control PCB Solder Side...
Page 40: ...38 Socket PCB Component Side Socket PCB Solder Side...
Page 41: ...39 SCHEMATIC DIAGRAM Power PFC Circuit...
Page 42: ...40 MCU OSD Key Deflection Dynamic Circuit...
Page 43: ...41 Deflection H V Circuit...
Page 44: ...42 Video Vertical Convergence Tilt Circuit...
