17
3. A Missing Color
Is input signal
normal?
One color is
missing
CRT
Cathode (Rk, Gk, Bk)
is normal?
Is video
output IC802
waveform normal?
Each grid (G1, G2)
voltage normal?
Is the
output of pre-amp
(IC801,TDA9210)
pin 14, 16,18 all
normal?
Check video signal
cable or video card.
Trouble in IC801 or its
ambient circuit
Trouble in
video output
IC802
or ambient
Trouble in 100Vdc
line
Trouble in G1,G2 line
Replace CRT
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
RK, GK, BK
About 40V p-p
0.7Vpp
Summary of Contents for 531X
Page 32: ...PCB LAYOUT 30 Main PCB Component Side...
Page 33: ...31 Main PCB Solder Side...
Page 34: ...32 CRT PCB Component Side CRT PCB Solder Side...
Page 35: ...33 SCHEMATIC DIAGRAM Power Connection Section...
Page 36: ...34 Control Vert out Section...
Page 37: ...35 Horizontal Section...
Page 38: ...36 Video Section...
Page 39: ...EXPLODED VIEW DIAGRAM 37...
