Yamaha RX-V740, Руководство по обслуживанию

Страница: 89 / 152

A B C D E F G H I J K L
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:
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
★
All voltages are measured with a 10M
Ω
/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.
P
age 86
to FUNCTION (1)
J2
to P
o
w
er
T
ransf
or
mer
P
age 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
P
age 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
4.8 0 4.9
0 0
0
0
0
0.7
0.7
0
9.3
9.3 10.0
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