ABCDEFGH I JKL
RX-V740/RX-V740RDS/DSP-AX740
RX-V640/RX-V640RDS/HTR-5660/DSP-AX640/DSP-AX640SE
89
1
2
3
4
5
6
7
8
9
DSP-AX640SE
SCHEMATIC DIAGRAM (OPERATION)
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
IC501: M66003-0101FP
FL Display Driver
2
data
timing
clock
dot data
write
scan pulse
IC551: NJM4556AL
Dual OP-Amp
8
2, 6
3, 5
1, 7
4
V+
–INPUT
+INPUT
V–
OUTPUT
IC611, 612: µPC4570G2
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
★ All voltages are measured with a 10MΩ/V DC electric 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.
Page 86
to FUNCTION (1)
J2
to Power Transformer
Page 81
to DSP
E1
FL DRIVER
FL DISPLAY
IR REMOTE
HEADPHONE AMP
HEADPHONE MUTE
PHONES
7
1
5
6
2
3
8
4
2
1
7
3
5
6
4
2
1
3
5
7
6
4
8
8
Page 86
to FUNCTION (1)
I2
Page 87
to FUNCTION (4)
B8
-26.3
-26.3
-26.4
-26.4
-26.4
-26.4
-26.4
-26.4
-26.4
-26.4
-26.2
-26.2
-26.4
-26.4
-26.4
-26.3
-12.6
-18.5
-18.5
-12.4
-18.4
-18.6
-24.4
-24.3
-24.3
-20.6
-24.5
-15.6
-18.6
-12.6
-22.3
-22.4
-22.1
-26.2
-24.3
-24.3
-20.4
-20.3
-22.3
-22.4
-14.6
-22.3
-20.4
-22.3
-22.3
-24.4
-28.3
-22.4
-22.2
-18.4
-20.7
-20.7
-20.7
-28.5
-22.3
-24.4
-24.4
-24.4
-20.7
-20.7
MAIN L
4.9
-22.3
-22.3
4.9
-18.4
-18.4
4.9
-15.6
-16.3
4.9
-22.4
-22.4
-24.4
4.9
-22.4
-24.4
-20.4
-20.4
-20.3
-22.3
-22.4
-14.6
-22.3
-22.3
-22.1
-26.2
-24.3
-22.4
-28.3
-26.4
-26.4
-26.4
-26.4
-26.3
-26.3
-26.3
-26.4
-26.4
-26.4
-26.4
-26.4
-26.4
-26.1
-26.4
-26.2
-22.3
-22.3
-24.4
-22.3
-22.3
-22.2
0
4.9
4.9
4.9
4.9
-18.4
4.9
-24.3
-24.5
-16.3
-24.4
-24.3
-24.3
-20.6
-18.5
-26.1
-26.2
4.9
-26.1
-26.2
4.9
-26.1
-18.6
-18.4
-12.4
-18.5
-12.6
-12.6
-18.5
4.804.9
0
0
0
0
0
0.7
0.7
0
9.3
9.310.0
0
0
0
0
-9.2
-9.2
-10.2
0
0
0
0
0
0
-11.8
0
0
0
0
0
0
-11.9
11.8
11.7
11.9
0
0
0
0
0
0
0
0
4.3
4.3
11.9
3.7
3.9
4.9
3.7
0
4.2
4.2
4.9
0
4.2
AC 5.6
4.9
0
0
0
0
0
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