A
1
2
3
4
5
6
7
8
9
10
B
C
D
E
F
G
H
I
J
K
L
M
N
RX-V1500/DSP-AX1500
SCHEMATIC DIAGRAM (OPERATION)
81
★
All voltages are measured with a 10M
Ω
/V DC electronic volt meter.
★
Components having special characteristics are marked
s
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
MIC
HEADPHONE AMP
FL DISPLAY
FL DRIVER
IR
REMOTE
INPUT
SELECTOR
P
age 83
to PO
WER (2)
E8
P
age 79
to FUNCTION
K1
Page 79
to FUNCTION
I1
P
age 80
to FUNCTION
J1
P
age 84
to VIDEO
(1)
P
age 80
to FUNCTION
C1
P
age 77
to DSP
E1
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
IC901: M66003-0101FP
FL Display Driver
2
data
timing
clock
dot data
write
scan pulse
Y
4
B
2
GND
3
IC902:
SN74AHCT1G32DCKR
2-Input or Gate
Vcc
5
A
1
IC903: NJM4556AL
Dual OP-Amp
8
2, 6
3, 5
1, 7
4
V+
–INPUT
+INPUT
V–
OUTPUT
IC904:
µ
PC4570G2
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
E5
-26.1
-14.5
-33.1
-21.3
-23.8
-21.6
-28.3
-28.3
-28.3
-28.3
-28.3
-23.9
-23.9
-23.9
-23.9
-23.6
-26.3
-26.1
-33.1
-33.1
-33.1
-33.1
-30.6
-30.5
-30.7
-30.7
-30.7
-30.7
-30.8
-30.8
-30.8
-30.8
-30.8
-30.8
-30.8
-30.8
-30.8
-25.7
-30.9
-30.9
-30.7
-28.3
-28.3
-28.4
-28.4
-30.6
-30.6
-30.6
-28.3
-28.2
-33.1
-33.1
-33.1
-25.7
-25.7
-30.5
-33.3
5.4
-30.5
-30.8
5.4
-30.5
-30.8
5.4
5.1
-33.1
-30.7
-23.9
-23.9
-26.1
-33.1
-33.1
-33.1
-30.6
-28.3
-28.3
-25.6
-28.2
-28.7
-26.3
-30.8
-28.2
5.4
-28.6
-28.5
5.4
-26.1
-28.7
5.4
-28.5
-28.3
5.4
-28.5
-28.3
5.4
-26.1
-25.6
-33.1
-28.3
-28.3
-21.6
-23.6
-21.3
-33.1
5.4
2.3
2.4
0
4.9
4.9
3.2
3.1
-30.7
-30.8
-30.8
-30.8
-30.8
-30.8
-30.8
-30.8
-30.8
-30.8
-30.9
-30.9
-30.7
-30.7
-33.3
-30.8
-23.6
-28.3
-23.9
-28.3
-28.3
-28.4
-30.6
-28.3
4.7
-30.6
-33.1
-30.6
-28.3
-28.3
-33.1
-26.2
5.1
0
-30.6
-30.8
4.9
0
0.3
0.1
0.3
0
4.9
0
0.7
9.7
9.0
0.7
0
0
0
9.0
0
0
0
-9.7
-9.4
-9.4
0
0
0
11.5
11.5
0
0
0
0
-12.0
0
0
0
x: NOT USED
O: USED / APPLICABLE
OPE(1)
OPE(2)
OPE(3)
8
4
3
2
4
6
5
7
1
4
2
3
