Yamaha RX-V750 Service Manual page 84

Av receiver/av amplifier
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A
B
C
RX-V750/DSP-AX750/DSP-AX750SE
RX-V650/HTR-5760
SCHEMATIC DIAGRAM (OPERATION)
1
2
~
~
~
–26.3
~
~
DISPLAY DRIVER
~
~
~
~
3
~
~
–24.4
–20.6
–22.5
–26.4
–26.4
–26.4
4
5
6
7
8
IC801 : M66003-0101FP
9
FL Display Driver
Display code
(8-bit x 60)
CS
Serial
2
data
SCK
3
receive
Code/
circuit
SDATA
4
command
control
circuit
XIN
7
Clock
timing
Display
generator
clock
controller
XOUT
6
10
RESET
1
Vcc1
8
Vcc2
18
Vss
5
Vp
64
84
D
E
F
HTR-5760
~
~
~
–26.3
~
~
~
~
~
~
4.8
2.2
0.1
~
~
0
4.9
4.9
4.9
4.9
Page 82
I-10
Page 79
K-1
TO FUNCTION (2) CB505
TO DSP CB7
Page 80
TO FUNCTION (1) CB309
IC901 : µPC4570G2
Dual OP-Amp
OUT
1
+V
RAM
CGROM
1
8
CC
44
SEG00
(35 bit x 166)
–IN
1
2
7
OUT
2
Segment
19
SEG25
+
+
Code
output
write
17
SEG26
+IN
1
3
6
–IN
2
circuit
CGROM
dot data
9
SEG34
(35 bit x 16)
–V
4
5
+IN
write
CC
2
45
SEG35
DIG11/
52
SEG42
DIG12/
51
SEG41
code
Segment
DIG13/
50
select
SEG40
digit
select/
DIG14/
49
output
SEG39
scan pulse
circuit
DIG15/
48
SEG38
DIG16/
47
SEG37
DIG17/
46
SEG36
63
DIG00
Digit
output
circuit
53
DIG10
G
H
I
TO POWER TRANSFORMER
0
OPTIMIZER MIC AMP
I-4
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
11.8
0
0
–10.4
0
0
0.1
–10.4
2.9
6
L
M
N
* 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
O

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Dsp-ax750Dsp-ax750seRx-v650Htr-5760

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