A
B
C
D
E
F
G
H
1
2
3
4
5
6
I
J
K
L
7
8
RX-797
32
■
SCHEMATIC DIAGRAM (OPERATION)
* All voltages are measured with a 10M
Ω
/V DC electronic volt meter.
* Components having special characteristics are marked
Z
and
must be replaced with parts having specifications equal to
those originally installed.
* Schematic diagram is subject to change without notice.
0
0
0
0
0
0
0
0
0
0
-12.8
-15.3
-14.6
-16.2
-16.2
-16.2
-16.2
-16.2
-16.2
-16.2
-16.2
-16.2
-16.2
-16.2
-16.0
-16.1
-17.8
-17.8
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-15.3
-15.7
14.7
0
0
0
14.7
0
0
0
0
0
0
-14.5
0
0
0
0
0
0
0
0.8
0.8
-14.5
-18.5
-18.5
-21.3
-17.8
-19.4
-16.3
-21.1
-21.1
-21.1
-21.1
-21.1
-21.1
-21.1
-21.1
-21.1
-21.1
-21.1
-19.5
-21.1
-16.2
-16.2
-16.2
-16.2
-19.5
-17.8
-16.2
-16.2
-14.6
2.1
4.8
4.8
4.8
4.8
0
2.2
-17.8
-19.4
-17.8
-16.0
-16.1
-16.2
-17.8
-21.2
-19.4
0
0
0
0
-19.5
4.8
-16.2
-19.5
0
4.8
4.8
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-19.5
-21.3
-16.3
-21.1
-21.1
-21.1
-16.2
-16.2
-21.2
-21.1
-16.3
-21.1
-16.2
-21.1
4.8
-21.1
-21.1
-21.1
-21.1
-17.8
-17.8
-19.5
-19.5
0
0
13.0
-14.6
-14.6
0
0
0.1
0.1
0.1
0
0
0.6
0.6
0.8
0.8
0.8
4.7
13.4
4.7
15.1
0
0.7
0.1
14.4
-14.3
11.7
13.9
15.1
15.1
13.7
13.7
PURE DIRECT OFF
CD DIRECT AMP OFF
CD DIRECT AMP ON
CD DIRECT AMP OFF
PURE DIRECT ON
PURE DIRECT OFF
CD DIRECT AMP ON
CD DIRECT AMP OFF
T
O
FUNCTION (2) CB611
P
age 31 E-4
T
O
FUNCTION (2)
W601
P
age 31 E-5
T
O
FUNCTION (1) CB503
P
a
ge 31 E-5
T
O
FUNCTION (2) CB606
P
age 31 G-4
T
O
MAIN (1) CB103
P
a
ge 33 A-6
TO MAIN (4) CB283
Page 33 B-1
T
O
FUNCTION (2) CB607
P
age 31 H-4
IC431: LB1641
Motor Driver
2
3
P1
5
IN 1
1
GND
4
VZ
6
IN 2
OUT
1
8
VCC 2
10
OUT
2
9
P2
INPUT LOGIC
PRE DRIVER
7
VCC 1
IC301, 302, 401, 751:
NJM2068MD-TE
Dual OP-Amp
–
+
OUT
1
–IN
1
–V
CC
+V
CC
OUT
2
1
2
3
4
5
+IN
1
–IN
2
+IN
2
–
+
6
7
8
IC801: M66003-0131FP
Display Driver
52
Display
controller
Segment
digit
select/
output
circuit
Serial
receive
circuit
Digit
output
circuit
Clock
generator
DIG11/
SEG42
51 DIG12/
SEG41
50 DIG13/
SEG40
49 DIG14/
SEG39
48 DIG15/
SEG38
47 DIG16/
SEG37
46 DIG17/
SEG36
45
SEG35
XOUT 6
Vcc1 8
Vcc2 18
Vss 5
Vp 64
XIN 7
CS
SCK 3
SDATA 4
RESET 1
SEG00
44
9
SEG34
SEG26
17
19
SEG25
Segment
output
circuit
Display code
RAM
(8-bit x 60)
CGROM
(35 bit x 166)
CGROM
(35 bit x 16)
code
select
Code
write
Code/
command
control
circuit
DIG00
63
53
DIG10
2
data
timing
clock
dot data
write
scan pulse
