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+24V
SYNC
VIDEO
GAME
CRT
H
V
VERTICAL
CONTROL
OSCILLATOR
VERTICAL
CONTROL &
HORIZONTAL
H.H.
REMOTE
CONTROLS
HORIZONTAL
Size Control
DIODE
Modulator
FBT
LOAD
ISOLATION
Transformer DOUBLER
VOLTAGE
SWITCHING
REGULATOR
Raw DC
320V
+52V to +129V
-200V
Driver
Output
3
Interface
DY
DY
H
s
V
LA7851
I. V. Feedback
K
H
s
H. Pos.
V. Size &
V. Ras. Pos.
PINCUSHION
Sync delay
M
NO
(PCB)
P
QR
(IN GAME)
S
Beam Current
(VIDEO & DEFLECTION)
U
+16V
+24-27V
Regulator
+12V
T
Sync
OVER
VOLTAGE
PROTECT
Vertical Deflection
Supply
V
W
X
V-
VIDEO
VIDEO
AMPS.
Bright
Auto
CRT AUTO
SYNC
BIAS IC
Bias
BLANKING
Interface
F.B.P.
V retrace
Beam limit
M. gain
H. sync (FBP)
V. sync
Program pulse
Grid pulse
Beam current
buffer
3
3
3
3
3
3
AB
C
E
G
I
J
D
3
L
Beam
Current
Feedback
On Video Board.
VERTICAL
F
SYNC
DELAY
G2≈290V
G1≈–20V
EHT≈25KV
EHTG2
High temp. limit
2
OUTPUT
LA7838
LA7851
+12V
RGB
V. & H.
CA3224E
+
Shutdown
FAULT
DETECTOR
Y
DEGAUSSING
CIRCUIT
Z
FBP
Vertical
Dynamic
Focus
2 For Dual Focus
2
Horizontal
Dynamic
Focus
V+
Dynamic Focus
used only on Dual
Focus CRTs
H1
H2
74
Monitor, Block Diagram Review.