CIRCUIT DESCRIPTION
1. Power Supply Circuit
+120V
Dropper Circuit
+2OV
(A)
+150V K1
H Deflect ion
.
+8OV
K2
DC/DC Converter
F B T
+24V
K 3
High Voltage
DC/DC
Converter
Hor
D e f l e c t i o n
- 6 0 V
(B)
I
c
+8OV ( C )
l
tl2V Ser i es
.
+12V (D)
Regulator
(A) +120V 3
(B) - 6 0 V 3
(C) +80V 3
(D) +12V 3
(E) +12V 3
(F) +12V 3
(G) +6V
3
(H) +5V
3
(I) - l o v 3
(J) - 5 V 3
(K) +18V 3
(L) +24V 3
Gr
F
+12V
S e r i e s
Regulator
+12v (E)
+12V S e r i e s _
. +12v (F)
R e g u l a t o r
Low Voltage
+6V (G)
C h o p p e r C i r c u i t
_
- t5V
S e r i e s +5V
( H )
1
1
1
Regu
I
ator
+18V S e r i e s
Regulator
* +18V (K)
I I
+ +24V (L)
(Fig l-l) BLOCK DIAGRAM of the 4FGe’s Power Supply
BRIGHTNESS
AND CUT-OFF CONTROL
SUB-BIAS CONTROL
VIDEO OUTPUT AMPLIFIER
D/A STARTUP CIRCUITS AND BRIGHTNESS/CONTRAST CONTROL D/A
and
OP-AMP
IC
SUPPLY VOLTAGE
HORIZONTAL OSCILLATION UNIT and POWER INDICATOR LED’s
VIDEO BOARD OP-AMP SUPPLY, VIDEO PRE-AMPLIFIER SUPPLY, and VERTICAL
DEFLECTION OUTPUT SUPPLY
CRT HEATER, and LOW +B PROTECTOR VOLTAGE
CPU, E’PROM, and MULTIPLIER. D/A IC SUPPLY VOLTAGE
DISTORTION ADJUST UNIT.
ANALOG MASTER OP-AMP and D/A OP-AMP OUTPUT SUPPLY VOLTAGE
DISTORTION ADJUST UNIT, and ANALOG MASTER SUPPLY VOLTAGE, and H OSC UNIT
VERTICAL DEF
L E
C T
I
ON
S U P P L Y
,
H O R I Z O N T A L
OSCILLATION UNIT
HI
G
H V O L T A
GE
PROTECTOR UNIT, DISTORTION ADJUST UNIT and ANALOG MASTER SUPPLY VOLTAGE
35
Summary of Contents for MultiSync 4FGe
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