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Yamaha DSP-AX757SE Service Manual Page 41

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ABCDEFGH
1
2
3
4
5
6
IJKLMNO
7
8
9
10
88
RX-V757/DSP-AX757/DSP-AX757SE
RX-V657/HTR-5860
■ SCHEMATIC DIAGRAM (OPERATION)
RX-V757/DSP-AX757/DSP-AX757SE/RX-V657
0.2
4.9
0
0
0
0
0
0
0.2
0
4.9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.1
0
0
0
0
0.7
4.2
5.4
11.9
0
10.7
-12.0
-22.0
-22.0
5.1
0
-22.0
-22.0
~
~
~
~
~
~
~
~
~
~
~
~
~
~
-26.9
-26.9
-26.8
-19.3
-8.2
~
-21.4
~
~
-21.2
~
~
~
-28.8
-19.3
~
~
~
-25.0
-21.2
~
~
~
~
~
~
~
-21.1
-26.9
~
~
-26.9
~
-25.0
-19.4
-23.2
~
~
-15.4
-21.4
-22.0
-22.0
-26.8
-26.9
4.9
-26.9
-26.9
4.9
-26.8
-26.9
-26.9
~
~
~
~
~
~
~
~
~
~
~
~
~
~
-29.0
~
-25.0
-21.3
~
~
~
~
~
~
~
-21.1
-26.9
~
~
4.9
-26.9
4.9
~
~
-19.3
-28.8
~
~
~
-21.2
~
~
~
-8.2
-19.3
-26.9
-26.9
-21.4
~
-25.0
-19.5
-23.2
~
~
-15.4
-19.5
4.9
2.2
0
4.9
4.9
4.9
4.9
2.2
-21.4
-19.5
4.9
-19.4
-19.5
-22.3
-25.6
-25.6
-29.0
4.9
-21.2
-21.3
4.9
-21.4
-21.4
4.9
0
5.0
4.9
2.8
2.8
0
4.9
5.1 4.9
4.9 4.9
5.1 4.9
4.9 4.9
0 5.0
0
DISPLAY DRIVER
OPTIMIZER MIC AMP
5
4
1
3
2
TO POWER TRANSFORMER
TO SUBTRANS (2) CB456
RX-V757/DSP-AX757/DSP-AX757SE/RX-V657 Page 92 H-8
TO DSP CB7
Page 86 F-1
TO FUNCTION (1) CB309
Page 87 I-4
TO DSP CB3
Page 85 D-1
TO FUNCTION (1) CB306
Page 87 G-1
*
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.
* 電圧は、内部抵抗10MΩの電圧計で測定したものです。
* Z印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
* 本回路図は、標準回路図です。改良のため予告なく変更することがございます。
IC901 : 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
IC801 : M66003-0131FP
FL 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
IC881 : SN74AHCT1G32DCKR
Single 2 Input OR
1
2
3
4
5
Y
A
B
GND
VCC
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