Level Control - Yamaha DSP-AX1/RX-V1 Service Manual

A B C
SCHEMATIC DIAGRAM (FUNCTION)
1
P-E97/J89
F-2
PHONE EQ AMP
0 11.1
0
0
2
0
0
-11.2
0
3
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
4
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
5 0 0
0 0
0 11.4
0 0
0
0
0
-11.5
6
0 11.4
0
0
0
0
0
-11.5
0 11.4
0
0
0
7
0
0
-11.5
0 11.4
0
0
0
0
0
-11.5
11.4
0
0
0
8 0
4.9
-11.5
0 0
0
-11.5
0
0
0
0
-11.5
9
P-E97/J89
C-3
Point u -A (+MB : Pin2 of CB8)
Point u -B (/RES : Collector of Q8)
Point y (Pin 13 of IC27)
V : 2V/div (+ MB), V : 2V/div (/RES)
V : 2V/div, H : 50 nsec/div
DC, 1 : 1 probe, H : 1 sec/div
DC, 1 : 1 probe
10
+ MB
0V
0V
0V
/RES
AC CORD ON AC CORD OFF
D E F
P-E91/J83
L-7
P-E91/J83 P-E91/J83
L-8 L-6

LEVEL CONTROL

11.4
0
0 0 0
0 0
0 4.8
0 0
0
0
0
0 5.1 -5.2
0 5.1
0 4.8
0
0 0
0
0
5.1
0
0 0 0
0
0
0 0 -11.5
11.4
0 0 0
0
0
4.8
0
0 0
0
0
0
5.1 -5.2
0 0 0 5.1
-11.5
4.8
0
5.1 0
11.4
0 0
REAR
0 0
0 0
CENTER
11.4
0
0 4.8
0
0
-5.2
5.1
0
0
0 5.1
0 0
0 4.8
0
0
5.1
-11.5
FRONT L
0
0
0
4.8
-11.4
0
5.1 -5.2
0 5.1
4.8
0
5.1
0 0
0
REAR L
0 0 0
0
11.4 -11.5 0
0 0
4.8
-11.5 0
5.1 -5.2
0 0
0 5.1
0
4.8
11.4 0
0
0 0
5.1
0
0
0 0
11.4 -11.5
0 0
0 0
11.4 0
11.4
-11.5
4.9
0
0
4.9
4.8
3.6
4.9
4.9
0
4.3 3.7
0
0
4.9
4.9
0
1.3
0.3
0
0.5
4.9 4.9
4.4
-11.4
ZONE 2 VOLUME
4.8
-11.4
4.9
0
0
10.6
0.7
6.4
0
6.4
0
P-E94/J86
P-E97/J89 P-E100/J92
P-E100/J92
I-5
C-4 C-2
B-6
IC1 : NJM2068MD-T1
µ
IC4~8, 10, 12~15, 22~26 : PC4570G2
Dual OP-Amp
OUT 1 +V
1 8 CC
–IN 2 7 OUT
1 2
+ – + –
+IN 3 6 –IN
1 2
–V 4 5 +IN
CC 2
G H
P-E97/J89
A-6
L
0
11.5
0
0
0
0
0 0
0 0
0
0
0 0
0
0
0
0
0
0
0
0
0
-11.6
0 CENTER
0
0
0
0 0 11.5
0
0
0 0 0
-11.6 0
0 0 0
0
0
0 11.5
0
0
0 0
0
0 0
0 0
0 0
0 0 11.5
0
0 0
0
0
-11.6
0
0
0
0
0
4.8
11.3
0
0 4.8
5.4 5.4 5.4
0 4.8
5.4
0 11.5
0
0
-11.5
-0.1
-11.5
-5.7 4.8
0 -5.7
0
-5.7
0
-5.1
-11.6
0
-5.1
0
0
0
0 -11.6
0
4.8
4.8
0
0 4.8
4.8
0
0
MAIN CPU
0
4.9
0 3.6
4.9
y
4.9
4.9
4.9
4.9
4.9
0
4.8
0
0
4.9
0
u-
A
u-
B
4.9 0
0 9.2
11.3 5.6 4.9 4.9 -9.5
11.3
4.9 -4.7
0.6 5.6
0 4.8
4.9
11.3 -8.9 2.4
4.8
0 9.7
0
0.6 4.9 7.3
7.1 0 0
0
0
IC31 : ADM202JRN-REEL7
RS-232 Line Drive/Reciever
V CC
16
C 1 + 1
+5V TO +10V
2 V+
VOLTAGE DOUBLER
C 1 – 3
C 2 + 4
+10V TO –10V
6 V–
VOLTAGE INVERTER
C 2 – 5
T IN 11 14 T OUT
1 T 1 1
TTL/CMOS RS-232
INPUTS OUTPUTS
T 2 IN 10 T 7 T 2 OUT
2
R OUT 12 R 13 R 1 IN
1 1
TTL/CMOS RS-232
OUTPUTS INPUTS
R 2 OUT 9 R 2 8 R 2 IN
15
GND
I J K
11.5
11.5
11.5
4.8
4.4
CIRCUIT CHANGES BY MARKET.
0
0
0
-11.6
P-E96/J88
G-1
4.8
4.8
0
4.8 0
0
4.9
4.4
0.3
-11.2
0.3
-11.2
P-E95/J87
I-5
4.9
4.4
0.3
-11.2 0.3
-11.2
P-E95/J87
H-5
4.9
4.4
-11.2
-11.2
4.9
P-E93/J85
4.3
D-2
4.3
4.3
4.9
4.3
-11.2
-11.2
P-E95/J87
F-1
P-E94/J86
I-4
L M N
DSP-AX1/RX-V1
IC2, 3 : TC9274N-013
Analog Function Switch
1 VSS VDD 42
2 S1 S1 41
3 S2 S2 40
4 S3 S3 39
5 S4 S4 38
6 S5 S5 37
7 S6 S6 36
8 S7 S7 35
9 S8 S8 34
10 S9 S9 33
11 S10 S10 32
12 S11 S11 31
13 S12 S12 30
14 S13 S13 29
15 S14 S14 28
16 S15 S15 27
17 S16 S16 26
18 S17 S17 25
19 24
20 GND STB 23
21 CK DATA 22
IC11 : LC78211
Analog Function Switch
L1 1 30 R1
L2 2 29 R2
L3 3 28 R3
L4 4 27 R4
LCOM1 5 26 RCOM1
L5 6 25 R5
L6 7 24 R6
LCOM2 8 23 RCOM2
L7 9 22 R7
X : NOT USED
L8 10 21 R8
LCOM3 11 20 RCOM3
V 19
DD LEVEL SHIFTER
V 16
SS
LATCH 14 D1
V 12
EE
RES 18 15 CL
SHIFT REGISTER
S 17
13 CE
IC21 : LC78212
Analog Function Switch
L1 1 30 R1
L2 2 29 R2
L3 3 28 R3
LCOM1 4 RCOM1
27
L4 5
26 RCOM1
L5 6 25 R5
L6 3 7 24 R6
LCOM2 8 23 RCOM2
L7 9 22 R7
L8 10 21 R8
LCOM3 11 20 RCOM3
V 19 LEVEL SHIFTER
DD
V 16
SS
LATCH 14 D1
V 12
EE
15 CL
RES 18
SHIFT REGISTER
S 17 13 CE
IC16~20 : CS3310-KS
Stereo Digital Volume Control
0.3
AINL 16
0.3
14 AOUTL
MUX
8 MUTE
8
8
1 ZCEN
2 CS
AGNDL
15 CONTROL
AGNDR REGISTER
10 3 SDATAI
16 SERIAL TO
8
PARALLEL 7 SDATAO
REGISTER
8
6 SCLK
MUX
11 AOUTR
AINR 9
12 13 4 5
VA+ VA– VD+ DGND
IC9 : LC7536-Y
Electric Controlled Volume
5 6 8 23 25 26
L5dB IN 1 30 R5dB IN
L CT1 3 28 R CT1
L CT2 4 27 R CT2
LVM R VM
9 22
S 12 LEVEL SHIFT 13 VDD
CE 19 21 VCC
LATCH
CLK 17 14 VSS
DI VEE
18 SHIFT REGISTER 10
2 7 11 15 16 20 24 29
NC
* All voltage are measured with a 10MΩ/V DC electric 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.
E-92/J-84