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Vs2.2 to 2.7Vdc
4.2Vp-p 360uS
Vs7.8 to 8.8Vdc
8.4Vp-p 95uS
68.1K
C1
LM324
1/4
LM324
1/4
LM324
1/4
+12V Line
100K
R
G
B
3.3K
909
Vs9 to 10Vdc
9.6Vp-p 95uS
2.7K
884
888
TC 10
1N4148
8
+
AUTO BIAS CIRCUIT
11
13
9
10
12
14
15
7
6
5
4
16
17
18
19
1
2
320
21
22
GND Vcc
Blue
Blue
GND
CA3224E
AUTO BIAS IC
+10V
.047uF
.047uF
.047uF
.1uF
.1uF
.1uF
891
22K
926
925
924
923
922
921
907
.1uF
894
908
895
927
910
892
911
33K
+
+
10uF
10uF
10uF
33K
33K
2.5-
6.7V
2.5-
6.7V
2.5-
6.7V
4.6-5.2VDC
2-
3V
.2-
.6V
1.2-
2.5V
5.7-
6.3V
1.2-
2.5V
1.2-
2.5V
5.7-
6.3V
3.8-
4.2V
7
5
4
comp.
input
hold
cap.
comp.
hold
cap.
comp.
hold
cap.
sw.
sw. in grid pls. pos.
sw.
sw.
normal
V. osc o/s or Delayed V. osc o/s
START
COUNTER
FF
CL
Q
EN
21 H. LINE
COUNTER
CL
DECODER
5V REF
BIAS
AUTO
BIAS
ACTIVE
PROGRAM
PULSE
GRID
PULSE
sw. control
1
Green input
Red input
Green
Red
To
Vertical
Blanking
7
4K
2,200pF
4K
2,200pF
4K
2,200pF
815
C15
C12
C14
C11
818
C9
941
C10
C4
1.82K
1N4005 X3
905 906903
15
18
14
5
6
3
2
1
12
13
14
13
12
17
16
19
20
5K
5K
5K
11
958
956
1,000pF
FDH400
948
954
2SA1370
1.8K
955
1.8K
VIDEO
INTERFACE
Video
Amp.
To CRT Grid #1
Green &
Red BEAM
CURRENT
Blue BEAM CURRENT
Blue video BIAS control line.
Adjust the bottom pot
on the FBT for +4.2V
914
15.8K
1/4
LM324
920
10
9
8
AUTO BRIGHT CIRCUIT
100K,
852
856
GND
V. Osc. O/S
V. Blanking
Filament Pls.
Bias active
Grid pulse
Program pulse
1
18
CRT AUTO BIAS AND AUTO BRIGHT SCHEMATIC.
10K 1K
330pF
873 855
871
C16
200
Ω
+
+
+
+
+
920
G2G1
6V REF.
FBT
878
2.2nF, 1KV
CRT
928
MPS2907
GND
1.8K
933
+12V
Grid pulse
1.8K
931
1.8K
874
-15V to -27V
ABA
TC 6
10
C
For XX92
C17
900Ω
C7
2.74K
1/2W
881
2.2K
1/2W
Red
Video Amp.
BIAS.
Green
Video Amp.
BIAS.
169K
858
2SC3675
850
090
68.1K
085
127K
087
TC9
+12V
1N4005
+
089
100uF
+16V
On main
board at DD1.
68.1K
C2
68.1K
C3
C8
200
Ω
C13
200
Ω
2,200pF
889
Beam current off on
power down circuit.
73