Daewoo 103FH Service Manual page 20

3. A missing Color
0.7Vpp
One color is
missing
Is input signal
normal?
Yes
Is the
output of pre-amp
(IC802, M52742ASP)
pin 29, 32, 35 all
normal?
Yes
Is CRT
Cathode (Rk, Gk, Bk)
normal?
Rk, Gk, Bk
About 45Vpp
Yes
Each grid (G1, G2)
voltage normal?
Yes
Replace CRT
No
Check video signal
cable or video card.
No
Trouble in IC802 or its
ambient circuit.
Is video
No
output IC803 waveform
normal?
Yes
Trouble in 80Vdc
line.
No
Trouble in G1 line
and G2 line
18
Trouble in
No
video output
circuit, IC803
or ambient.