Schematic Diagram - Yamaha MDX-596 Service Manual

A B
MDX-596

SCHEMATIC DIAGRAM

1
2
P-E48/J46
[K-7]
4.9
0
4.9
0
4.9
1.9
1.9 ~
~ ~
~
0
3.2 ~
4.9
3
3.6
3.6
0
1.6
5.0
0
DIGITAL INPUT
4
5.0
0
4.0
5.0
0
4.0
5
6
7
8
E-49/J-47
C D E
0
6.0
0 0
LPF
0
0
0
-6.0
6.0
0
0 0
BUFFER
0
0
0
-6.0
SELECTOR
0 0
0 0
0 0
0
0
4.9
0 4.9
0 0
0 0
MAIN CPU
0 0
0 0
0 0
0 4.9
0 2.4
0 0
0 2.1
0
5.0
0 5.0
0 ~
5.0 4.2
0 4.4
0 0
0
0
EEP
0 0
0
0
ROM
0 0
0
0
0 0
0
0
0 4.9
0
4.9
P-E50/J48
[A-4]
F G
MUTING
0
-5.9
0
0 -5.9
0
0
0
-5.9
0
-5.9
0
6.0
0
0
0
BUFFER
0
0
0
-6.0
MUTE CONTROL
4.4
4.9
4.4 -6.0
4.9
4.4
0
-13.3
-13.2
-6.0 -13.3
-12.6
POWER
SUPPLY
q
10.7
RESET
11.2
6.0
11.3
w
6.2
4.9
0 6.2 10.9
0
0
5.4
0
0
5.0 11.3
10.6
10.6
1.2
0
0
-29.6
-28.9
-35.4 -35.4 -24.2
-28.9
H I
11.2 10.6 10.2
8
PHONES
0 3
0
2
1 AMP
0
6
0
7
0 5 0
-12.8 4
-13.5 -12.3
AC21.3
AC4.2
ON/OFF
Point q
V : 2V/div
DC range
CIRCUIT CHANGES BY MARKET.
-13.4
-24.2
0V
X : NOT USED
J K
IC3 ~ 5 : NJM2068D-D IC201 : BA15218N
Dual OP-Amp Dual OP-Amp
OUT 1 1 8 +V CC
+ +
–IN 2 7 OUT
1 2
+ – + –
– –
+IN 3 6 –IN
1 2
–V CC 4 5 +IN 2
1 2 3 4 5 6 7 8
IC1 : TC74HCT04AP
Hex Inverters
1A 1 14 V DD
1Y 2 13 6A
2A 3 12 6Y
2Y 4 11 5A
3A 5 10 5Y
3Y 6 9 4A
V 7 8 4Y
SS
IC2 : TC74VHC157F
2 to 1 Data Selectors
INPUTS OUTPUT INPUTS OUTPUT
V CC STROBE 4A 4B 4Y 3A 3B 3Y
16 15 14 13 12 11 10 9
G 4A 4B 4Y 3A 3B
S 3Y
1A 1B 1Y 2A 2B 2Y
1 2 3 4 5 6 7 8
SELECT 1A 1B 1Y 2A 2B 2Y GND
INPUTS OUTPUT INPUTS OUTPUT
FUNCTION TABLE
INPUTS
OUTPUT
SELECT STROBE
Y
G
X H L
L L A
H L B
IC7 : S-24C01ADP
Electrically Erasable PROM
TEST
7
8 V CC
4 GND
SCL 6
START / STOP
LOGIC SERIAL
SDA 5
CLOCK
CONTROL H.V.GENERATOR
LOAD
DEVICE
COMP
ADDRESS
COMPARATOR DATA
LOAD INC
REGISTER
A2 3 R/W ADDRESS
COUNTER
E 2 PROM
A1 2
A0 1
Y DECODER SELECTOR
DATA OUT
ACK OUT
D IN
CONTROL
D OUT
IC8 : M5290P
Constant-Voltage Tracking Supply with Reset
OUTPUT
VCC E– C+ NC (+5V) DELAY
16 15 14 13 12 7
REFERENCE
11
IN
8 RESET OUT
REFERENCE CURRENT
PROTECTION
REGULATOR
CONTROL
GND
9
ON/OFF
CONTROL
10
+
6 BAL. ADJ.
CURRENT CURRENT
CONTROL CONTROL
1 3 2 4 5
–VCC E– C– NC OUTPUT
(–5V)
(Pin 13 of IC6) Point w
H : 20 µsec/div
CH1 : Emitter of Q2 V : 2V/div CH1
1 : 1 probe CH2 : Collector of Q14 V : 2V/div CH2
H : 5 sec/div DC range 1 : 1 probe
CH 1
CH 2
AC CORD
AC CORD
ON OFF
* All voltages are measured with a 10MΩ/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.
L