Daewoo 719B Service Manual page 21

3. A Missing Color
0.7Vpp
(IC801, TDA9210)
Cathode (Rk, Gk, Bk)
Each grid (G1, G2)
One color is
missing
Is input signal
normal?
Yes
Is the
output of pre-amp
pin 16,18, 20 all
normal?
Yes
CRT
is normal?
RK, GK, BK
About 40V p-p
Yes
voltage normal?
Yes
Replace CRT
No
Check video signal
cable or video card.
No
Trouble in IC801 or its
ambient circuit
Is video
No
output IC(IC802,
TDA9536)
normal?
No
Replace Video output IC
No
Trouble in 100Vdc line
19
Trouble in
Yes
video output
circuit or
ambient