3. A Missing Color
One color is
missing
Is input signal | No |
normal? |
|
0.7Vpp
Yes
Is the
output of 
pin 14, 16,18 all normal?
Yes
Check video signal cable or video card.
Trouble in IC801 or its ambient circuit
CRTNo
Cathode (Rk, Gk, Bk)
is normal? RK, GK, BK
About 40V
Yes
Each grid (G1, G2)
voltage normal?
Yes
No Replace CRT
Is video
output IC802 No waveform normal?
Yes
Trouble in 100Vdc line
Trouble in G1,G2 line
Trouble in video output IC802
or ambient
17
