Zenith ZVM-121 Service Manual page 19

SPOT BURN PROTECTION (Figure 5-6)
When the Monitor is turned off,
CRB03
and
CB09
keep
the collector voltage high. This keeps the CRT biased
off, preventing spot burn.
B+110V
R832
5.1K
,/,W
L802
150uH
CR803
R831
5.1K
'I2W
~ C~.~9
1-
160V
R829
1.5K
'I2W
10%
Q804
VIDEO OUTPUT
C814
.0027
r
YELLOW 2
Figure 5-6
B+110V
R827
15K
'I2W
10%
1.5
YEUBLUE
J I
I
J
I I
I
6 R207 7
YEL/ORG
33K
'I,W
10%
R838
t20K
R839
15K
Page 5-5
TO N.V.