Yamaha Mx12.6 Service Manual

   
 
6 5 4
3
H FG E D C B A AH G F E D C B
1
2C3MX12/6 MX20/6MX12/6 MX20/6 MX12/6 MX20/6
CIRCUIT DIAGRAM 3/10(
MAIN1/4)
238CC1-8817676
from P.C2-G5
OP AMP
OP AMP
OP AMP OP AMP OP AMP
OP AMP OP AMP
OP AMP OP AMP
OP AMP OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
from P.C4
-E4,
F4
-D3 from P.C6
from P.C4
-B3,
C3,
D4
OP AMP
OP AMP
to P.C4-E3
1/4
to P.C6-F4(
to DCJK 2/2 CN301)
(
to DCJK 2/2 CN302)
to P.C6-E4
to P.C4-A5-F5
MAIN 

   
 
6 5 4
3 1
2C4
H ABG F CDE AH G BCF E D
MX12/6 MX20/6
MX12/6 MX20/6 MX12/6 MX20/6
CIRCUIT DIAGRAM 4/10(
MAIN1/4)
238CC1-8817676to P.C6-D3
from P.C3-G5
OP AMP
OP AMP OP AMP
GRAPHIC7SEG. GRAPHIC7SEG.
LEVELLED
OP AMP
METER LEVEL
METERLED
OP AMP OP AMPOP AMP
from P.C3-F5 from P.C3-B5
OP AMP OP AMP
OP AMP
from P.C3-E5
OP AMPOP AMP
from P.C3-E5
1/4
OP AMP
MAIN 

   
 
6 5 4
3
H FG E D C B A AH G F E D C B
1
2C5MX12/6 MX20/6MX12/6 MX20/6 MX12/6 MX20/6
CIRCUIT DIAGRAM 5/10(
MAIN4/4)
238CC1-8817676
ROM 4M CPU MCU
INVERTER
ADA
OP AMP
4/4
(
to MAIN 1/4 CN204)
(
to DCJK 1/2 CN105)to P.C6-D3
to P.C7-G4
MAIN 

   
 
6 5 4
3 1
2C6
H ABG F CDE AH G BCF E D
MX12/6 MX20/6
MX12/6 MX20/6 MX12/6 MX20/6
CIRCUIT DIAGRAM 6/10(
MAIN1/4,
MAIN2/4,
MAIN3/4,
DCJK2/2)
38CC1-8817678
from P.C4-F5
2/2
38CC1-88176762
2/4
MX12/6 only
INSERT I/O1
2
3
4
3/4
1/4
to P.C3-B5 to P.C1-B3
(
to MAIN12 1/4 CN203)
(
to DCJK 1/2 CN106)
to P.C7-E2
to P.C3-E5
(
to MAIN 1/4 CN202) (
to DCJK 1/2 CN107 OR CN108)
to P.C7-G3
(
to MAIN 4/4 CN304)to P.C5-B2
(
to MAIN 1/4 CN201)to P.C3-B5
DCJK MAIN
MAINMAIN 

   
 
6 5 4
3
H FG E D C B A AH G F E D C B
1
2C7MX12/6 MX20/6MX12/6 MX20/6 MX12/6 MX20/6
CIRCUIT DIAGRAM 7/10(
DCJK1/2)
38CC1-8817678
1/2
POWER TRANSFORMER
REGULATOR +15V
REGULATOR -15V
REGULATOR +12V
REGULATOR +5V
REGULATOR +48V
(
to MAIN 3/4 CN206)to P.C6-B4
to P.C6-D2
(
to MAIN 1/4 CN207
OR IN8 CN403)
OR IN8 CN403) (
to MAIN 1/4 CN207
to P.C10-C4
to P.C5-G2
(
to MAIN 4/4 CN305)
DCJK 

   
 
6 5 4
3 1
2C8
H ABG F CDE AH G BCF E D
MX12/6 MX20/6
MX12/6 MX20/6 MX12/6 MX20/6
CIRCUIT DIAGRAM 8/10(
IN8 1/2)
MX20/6 only
138CC1-8817677
OP AMP
OP AMP
OP AMP
OP AMP OP AMP
OP AMP
OP AMP
OP AMP
OP AMPOP AMP OP AMP OP AMP OP AMP
1/2
to P.C9-G1 from P.C9-G5
from P.C9-C1
to P.C10-C3
(
to IN8 2/2 CN501)(
to MAIN20 1/4 CN208)
to P.C1-G2
IN8 

   
 
6 5 4
3
H FG E D C B A AH G F E D C B
1
2C9MX12/6 MX20/6MX12/6 MX20/6 MX12/6 MX20/6
OVERALL CIRCUIT DIAGRAM 9/10(
IN8 1/2)
MX20/6 only
138CC1-8817677
OP AMP OP AMP
OP AMP
OP AMP
OP AMP OP AMP OP AMP OP AMP OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
1/2
to P.C8-G1 from P.C8-G5
from P.C8-B1
to P.C10-D3
(
to IN8 2/2 CN502)
IN8 

   
 
6 5 4
3 1
2C10
H ABG F CDE AH G BCF E D
MX12/6 MX20/6
MX12/6 MX20/6 MX12/6 MX20/6
CIRCUIT DIAGRAM 10/10(
IN8 1/2,
IN8 2/2)
MX20/6 only
JKL01
JY6351F-06-340
JY6351F-06-340JKL02
JY6351F-06-340JKL03
JKL04
JY6351F-06-340JY6351F-06-340JKL05
JY6351F-06-340JKL06
JY6351F-06-340JKL07
JY6351F-06-340JKL08
38CC1-88176771
INSERT I/O1
2
3
4
2/2
1/2
8 7 6 5
INSERT
I/O
to P.C8-A3
(
to IN8 1/2 CN401)(
to IN8 1/2 CN402)
to P.C9-B4
to P.C7-G3
(
to DCJK 1/2 CN107 OR CN108)
IN8
IN8 

PARTS LIST
 CONTENTS
OVERALL ASSEMBLY .............................................. 2
ELECTRICAL PARTS ............................................. 5
 WARNING
Components having special characteristics are marked       and must be replaced with parts having
specification equal to those originally installed.
Notes : DESTINATION ABBREVIATIONS
The numbers ÒQTYÓ show quantities for each unit.
The parts with Ò--Ó in ÒPART NO.Ó are not available as spare parts.
This mark Ò } Ó in the REMARKS column means...

MX12/6
MX20/6
2
OVERALL ASSEMBLY
model: MX20/6
P130
P50P100P110
P130
P120P150
P30a
P20a
P20d
P30bP20b
B160
P20c
P130
P120P130
P110
P140
P10
P40
P40
B10
10
30
40
30
20
30
P90
P80
P70
MX20/6 only
MX20/6 only
MX12/6 only MX12/6 only
P60
P170P160
B80b
B170
B180
B130
B100
B200
B210
B190
B80a
B80a
B140B110
B120
B140a
B10
B30
B40
B15
B50B70B60
B10
B20
B90