Yamaha MDX-E100 Service Manual page 44

A B
MDX-E100
SCHEMATIC DIAGRAM (MAIN)
1
5.0
0 0
5.0
0
P-E48/J46
[K-7]
2
2.0 ~ ~
~ ~ ~
REGULATOR
3.1 3.2 5.0
3.5
3.5
0
3
P-E50/J48
[F-2]
4
5.0
DIGITAL INPUT SELECTOR
0
5.0
0
5
0
0
0
0
0
0
0
0
0 MAIN CPU
0
0
0
0
0
0
0
0
0
5.0
6
0
0
0
0
0
0
0
0
0
0
0
7
Point q
(Pin 13 of IC106)
V : 2V/div H : 50 nsec/div
DC range 1 : 1 probe
8
0V
E-49/J-47
C D E
LPF
0
6.0
0 0
0
0
0
-6.0
6.0
3
8 0
1
0
0
2
6
0
7
0 0
4
5
-6.0
MUTE CONTROL
4.2
4.2
4.2
4.9
-6.0
0
4.9
-6.0
5.0
5.0
4.9
0
5.0
4.9
0
6.0
0
w
0
q RESET
0
0
4.9
4.9
2.4
0 6.4
0
2.1
5.0 5.7
0
5.0
~
4.3
4.5
0 0
0 0
0
0
5.0
0
EEPROM
0
0
0
5.0
5.0 1.2
1.2 0
5.0 0
0
-22.2
5.0
-22.9 -22.9
0 -22.9 -22.9
-23.5
4.9
-22.9
-29.3
4.2
Point w
CH1 : Pin 12 of IC106 V : 2V/div CH1
CH2 : Cathode of D112 V : 5V/div CH2
H : 0.5 sec/div DC range 1 : 1 probe
CH 1
CH 2
AC CORD : ON AC CORD : OFF
F G
MUTING
0
0
-5.9 -5.9
0 0
0
0
-5.9 -5.9
0 0
6.0
0
0
0
0
0
0
-6.0
POWER SUPPLY
-13.4
-13.4
-12.7
10.3
10.9
10.9
10.9
6.4
w
AC20.6
10.9
10.3
10.8
5.0
AC4.16
10.3
5.6
5.6
0
0
-29.9
-13.4
-29.3 -32.9 -22.9
-32.9 -22.9
IC108 : M5290P
Constant-Voltage Tracking Supply with Reset
VCC
E– C+
Point e
(Pin 58 of IC301)
16 15
H : 0.2 µsec/div
V : 2V/div
DC range 1 : 1 probe
REFERENCE
REGULATOR
GND 9
0V
ON/OFF
ON/OFF 10 CONTROL
1
–VCC
H I
e
-27.0
-27.0
-27.0
-27.0 FL DRIVER
-27.0
-27.0
-27.0
-27.0
-27.0
~
~
~
OUTPUT
NC (+5V) DELAY
14 13 12 7
REFERANCE
11
IN
8 RESET OUT
CURRENT
PROTECTION
CONTROL
+
BAL. ADJ.
6
CURRENT CURRENT
CONTROL CONTROL
3 2 4 5
E– C– NC OUTPUT
(–5V)
J K L
IC101 ~ 103 : NJM2068MD IC104 : TC74HCT04AF
Dual OP-Amp Hex Inverters
1A 1 14 V DD
OUT 1 1 8 +V CC
1Y 2 13 6A
–IN 2 7 OUT
1 2 2A 3 12 6Y
+ – + –
+IN 3 6 –IN 2Y 4 11 5A
1 2
–V 4 5 +IN 3A 5 10 5Y
CC 2
3Y 6 9 4A
7
V SS 8 4Y
IC105 : TC74HC153AF
Dual 4 to 1 Data Selectors
STROBE A DATA INPUTS OUTPUT
VCC 2G SELECT 2Y
16 15 14 13 12 11 10 9
2C3 2C2 2C1 2C0 2Y
2G
B B A A
B B A A
1G
1C3 1C2 1C1 1C0 1Y
1 2 3 4 5 6 7 8
STROBE B OUTPUT GND
DATA INPUTS
1G SELECT 1Y
OUTPUT
INPUTS
SELECT STROBE
Y
B A
G
X X
H L
L L
L C0
H
L L C1
H L L C2
H H L C3
IC107 : X24C01P
Electrically Erasable PROM
~
~
~
VCC START
8 H.V.GENERATION
~ CYCLE
TIMING &
~ VSS
4 CONTROL
~
SDA START
~ 5
STOP
~ LOGIC
CONTROL E PROM 2
~
XDEC 32
LOGIC 32X32
~ SCL 6
LOAD INC
~
~ 5 32
WORD 2
~
ADDRESS YDEC
NC 1
COUNTER
~
NC 2 8
~
CK
NC
3
~ PIN DATA REGISTER
NC
7
D OUT
D OUT
ACK
IC301 : LC75710NE
FL Driver
G6 49 32 AM32
G5 50 31 AM31
G4 51 30 AM30
G3 52 29 AM29
G2 53 28 AM28
G1 54 27 AM27
VFL 55 26 AM26
TEST 56 25 AM25
VSS 57 24 AM24
OSCO 58 23 AM23
OSCI 59 22 AM22
VDD 60 21 AM21
RES 61 20 AM20
CE 62 19 AM19
CL 63 18 AM18
DI 64 17 AM17
CG
DI ROM
SHIFT
CL DC RAM AM1
REGISTER
CG AM2
CE
ROM
ADDRESS ADDRESS AD
VDD AM35
REGISTER COUNTER
RAM
AA1
VSS
BLINKCYCLE BLINK AA2
REGISTER GENERATOR
AA3
VFL
AA4/G16
RES DISPLAY DISPLAY
REGISTER CONTROL AA5/G15
AA6/G14
TEST
DUTYCYCLE DUTY AA7/G13
REGISTER GENERATOR
AA8/G12
G11
GRID GRID
G10
REGISTER CONTROL
INSTRUCTION
CONTROL
DECODER
OSC I
G2
TIMING
OSC DIVIDER DECODER G1
GENERATOR
OSC O
* 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.