Sony CA-755, Maintenance Manual

Page: 91 / 132

4-19
CA-755/755P
IC
ADJUSTABLE VOLTAGE REGULATOR
-TOP VIEW-
ADJ
(3)
OUTPUT
(2)
ADJ
1
OUT
2
IN
3
INPUT
(1)
REGULATOR (VARIABLE VOLTAGE SHUNT)
-TOP VIEW-
CATHODE
ANODE
REFERENCE
ANODE
(A)
ANODE
(A)
CATHODE
(K)
REFERENCE
UPC1093T (NEC)
UPC1093T-E1
UPC1906GS (NEC)FLAT PACKAGE
UPC317HF (NEC)
PWM POWER CONTROLLER
-TOP VIEW-
1
2
3
4
5
6
7
8
GND
DTC
IN
FB1
IN
FB2
OUT
I
I IN
I
N IN
OCL
IN
EM
IN
15
16
2
4
5
8
10
12
13
1
7
V
REF
OUTPUT
FB2
16
15
14
13
12
11
10
9
V CC ( 18V)
C
T IN
R
T IN
V
REF OUT
ON/OFF CONT
IN
OVL
IN
COL
IN
OUTPUT
INPUT
COL
DTC
EM
FB1
I
I
, I
N
OCL
ON/OFF CONT
OVL
OUTPUT
FB2
V
REF
; COLLECTOR
; DEAD TIME CONTROL
; EMITTER
; FEED BACK1
; ERROR AMP
; OVER CURRENT LATCH
; ON/OFF CONTROL
; OVER VOLTAGE LATCH
; FEED BACK2
; REFERENCE VOLTAGE
14
9
3
R
T
C
T
FB1
I
I
I
N
EM
COL
OVL
ON/OFF CONT
DTC
OCL
ON/OFF
CONTROL
OSCILLATOR
PWM
COMPARATOR
ERROR
AMP
+
–
–
–
–
+
OVER
VOLTAGE
LATCH
REFERENCE
REGULATOR
V
REF OUT
COL
IN
OUTPUT
EM
IN
FB2
OUT
14
OVL
IN
ON/OFF CONT
IN
R
T IN
C
T IN
DTC
IN
FB1
IN
I
I IN
I
N IN
OCL
IN
12
13
15
16
1
2
4
5
7
10
9
8
3
OVER CURRENT
LATCH