Yamaha RX-Z9, Service Manual

Page: 137 / 190

A B C D E F G H
1
2
3
4
5
6
I J K L M N
7
8
9
10
137
RX-Z9/DSP-Z9
■
SCHEMATIC DIAGRAM (OPERATION)
IC951 : SN74AHC1G32DCKR
Single 2-Input Positive-OR Gate
1
2
3 4
5
Y
A
B
GND
VCC
IC952 :
µ
PC4570G2
Dual OP-Amp
– +
OUT1
–IN1
–VCC
+VCC
OUT2
1
2
3
4 5
+IN1 –IN2
+IN2
– +
6
7
8
IC901, 902 : M66005-0141AFP-280
Display Controller
P1
18
17
DISPLAY
CONTROL
REGISTER
OUTPUT
PORT
(2BIT)
SERIAL
RECEIVE
CIRCUIT
DIGITAL
OUTPUT
CIRCUIT
DISPLAY
CONTROLLER
CLOCK
GENERATOR
P0
XOUT 20
XIN 21
CS 14
SCK 15
SDATA 16
RESET 13
DIG00 12
61 DIG15
DIG12 64
1 DIG11
SEG00 59
23 SEG35
SEG27 31
33 SEG26 SEGMENT
OUTPUT
CIRCUIT
DISPLAY CODE
REGISTER
(8BITx16)
CGROM
(35BITx160)
DECODER
CGRAM
(35BITx16)
DECODER
CODE
SELECT
CODE
WRITE
RAM
WRITE
CORD/
COMMAND
CONTROL
CIRCUIT
-29.7
-29.0
-29.0 -29.0 -29.0 -27.5 -26.4 -28.1
0
2.2
2.2 5.0
4.8 4.8 4.8 4.8 -29.1 -29.1 -29.1 -29.1 -29.1 -29.1 -29.1
-27.6 -29.8
-29.0 -29.0 -29.0 -29.0 -27.5 -26.4 -28.1
-21.9
-21.9 -21.9
-21.9 -21.9 -21.9
-26.8 -26.8
-26.8
-26.7
-28.3 -28.3 -29.7 -29.7 -29.7 -29.7 -28.8 -11.8
-28.8 -11.8
-26.0 -26.0
-26.0 -26.0
-26.8
-26.8
-26.8 -26.8
-26.8
-29.1 -29.1 -29.1 -29.1 -29.1 -29.1 -29.1 -29.1 -29.1 -29.1 -28.2 -28.2 -26.7 -26.8 -26.8 -26.8 -26.8 -26.1 -28.2 -26.0 -29.0 -29.0 -29.0 -29.7
-28.2 -28.2 -26.7 -26.8 -26.8 -26.1 -28.2 -26.0 -29.0 -29.0
-29.0
-29.0
-29.7
-29.0
-29.0
-29.0 -29.0
-29.1
-29.1 -29.1 -29.1
-29.1 -29.1 -29.1
-29.1 -29.1 -29.1 -26.8 -24.7 -25.3
-25.3
-29.0 -29.0
-25.3 -25.3 -24.7 -29.7 -26.0
-26.1 -29.0
-29.0
-26.8 -26.7 -28.3
-28.3
-29.7
-29.7
-26.1 -26.8 -26.8
-29.7
-29.7
-29.7
-29.7
0
2.2
2.2
4.8
4.8
4.8
4.7
-26.0 -29.0
-29.0 -29.0
-29.0
-27.6 -29.8
-26.9 -28.3 -28.3 -26.8 -25.4
-28.2
-29.0
-29.0
-29.1 -29.1 -29.1 -29.1 -29.1 -29.1
-29.1 -29.1 -29.1 -29.1 -29.1 -29.1 -29.1 -29.1
-29.0
-29.0
-26.9
-26.8 -25.4
-28.3
-28.3
-28.2
-28.8 -28.8
-28.9 -26.1 -24.5 -26.0 -26.8
-29.1 -29.1 -29.1 -29.1 -29.1
-28.3 -28.4 -28.3 -28.9 -27.5 -29.0 -29.0 -29.0 -29.0
-21.7
-21.9 -21.9 -21.9
-21.9
-21.9
-21.9
0
4.9
0
0 0
0
4.9
0
0
0
0
0
0 0
0 0
0
0
0
0
0
-12.5
0
12.0
11.3
0
0
5.0
-29.0
-28.8
5.0
-29.0
-28.8
5.0
-26.8
0
0
0
0
3.0
5.0
5.0
2.9
-26.8
0
4.8
4.9
-29.7
-26.1 -26.0 -26.1 -24.5 -26.8 -26.8 -25.6 -24.6 -24.6 -25.3 -25.7 -25.4
-28.3
-28.9 -28.9
-28.9 -28.9
-28.4 -28.3 -27.5 -29.0 -29.0 -29.0 -26.1 -26.8
-25.6 -24.6
-24.6 -25.3 -25.7 -25.4
5.0
-11.8
X: NOT USED
EUROPE
T
O
PO
WER (2) CB702
P
age 143 K-2
T
O
DSP1 (1) CB9
P
age 131 L-7
T
O
FUNCTION CB2
P
age 135 C-1
T
O
VIDEO T
OP
CB12
P
age 141 A-2
T
O
FUNCTION CB1
P
age 135 C-1
T
O
PO
WER (2) CB703
P
age 143 N-3
T
O
VIDEO T
O
P
CB14
P
age 140 A-3
T
O
VIDEO T
O
P
CB16
P
age 140 A-7
* 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.