Yamaha RX-V750 Service Manual page 83

A B C
SCHEMATIC DIAGRAM (OPERATION)
RX-V750/DSP-AX750/DSP-AX750SE/RX-V650
1
2
~
~
~
–26.3
~
DISPLAY DRIVER
~
~
~
3
~
~
~
~
–24.4
–20.6
–22.5
–26.4
–26.4
–26.4
4
5
4.8
6
7
8
9
SDATA
XOUT
10
RESET
D E F
~
~
~
–26.3
~
~
~
~
~
~
4.8
2.2
0.1
~
~
0
4.9
4.9
4.9
4.9
Page 81 I-10 Page 79 K-1
TO DSP CB7
TO FUNCTION (2) CB505
TO FUNCTION (1) CB309
IC901 : µPC4570G2
IC801 : M66003-0101FP
FL Display Driver Dual OP-Amp
Display code
OUT 1
RAM CGROM 1 8
44 SEG00
(8-bit x 60) (35 bit x 166)
–IN 1 2 7
Segment 19 SEG25 + – + –
Code
output
write 17 SEG26
+IN 1 3 6
circuit
CGROM
CS Serial dot data 9 SEG34
2 data (35 bit x 16) –V 4 5
write CC
SCK 3 receive
Code/
circuit
4 command
45 SEG35
control
circuit
DIG11/
52
SEG42
DIG12/
51
SEG41
code Segment DIG13/
50
select SEG40
digit
select/ DIG14/
49
XIN 7 Clock output SEG39
timing Display
generator clock controller scan pulse circuit DIG15/
6 48
SEG38
DIG16/
47
SEG37
DIG17/
46
SEG36
63 DIG00
Digit
output
1
circuit
Vcc1 8
53 DIG10
Vcc2 18
Vss 5
Vp
64
G H
TO POWER TRANSFORMER
11.8
0
OPTIMIZER MIC AMP
Page 80 I-4
+V
CC
OUT 2
–IN 2
+IN
2
I J K
4.1
4.1
4.1
0
4.9
Page 79 F-1
TO DSP CB3
Page 80 G-1
TO FUNCTION (1) CB306
0
0
–10.4
0
0
0.1
–10.4
2.9
L M N
RX-V750/DSP-AX750/DSP-AX750SE
RX-V650/HTR-5760
X: NOT USED
O: USED / APPLICABLE
* 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.
Z
83