YORKVILLE Coliseum CA12, Service Schematics

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1 2 3 4
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4 3 2 1
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Title
Number Revision Size
A4
Date: 15-Feb-2006 Sheet of
File: D:\OTHER MODEL\MP1200\AMP1270.ddbDrawn By:
MAIN BOARD 4OF 7
4 7
LHH
1270S04.SCH
TO BUS LINE BOARD CNA01
R
4
0
9
4
7
K
R401
1.5K
R403
56K
R405
10K
R407
4.7K
C403
56P
C401
4u7/50V
3
2
1
IC401A
4558
R
4
1
0
4
7
K
R402
1.5K
R406
10K
R408
4.7K
C404 56P
C402
4u7/50V
5
6
7
IC401B
4558
IN
P
U
T
R404
56K
L
IN
E
-1
R
4
1
4
2
.2
K
R415
220K
C411
56P
3
2
1
IC402A
4558
R
4
1
1
1
0
0
K
5
6
7
IC402B
4558
R
4
1
9
1
0
K
R420
15K
D402
1N4148
C412
100uF/25V
R416
4.7K
R
4
1
3
1
0
0
K
FC401
N.C
FC402
N.C
2
3
1
SW401A
5
6
4
SW401B
R
4
1
2
1
0
0
K
Q401
2N4401
R417
100
C409
4u7/50V
C405
10u/25V
C406
10u/25V
R
4
2
5
2
2
K
D405 1N4148
1
2
3
4
5
6
7
8
9
10
CNA402
BUS-L BUS-R
TO ZONE 4AMPLIFIER
CLOCK
Clock
POWER.4
R-CH.4
L-CH.4
D407
1N4148
+15V
-15V
8
4
IC402C
4558
8
4
IC401C
4558
C407
100uF/25V
C408
100uF/25V
+15V
-15V
L-IN.4
R-IN.4
BUS PW
C410
10u/25V
D
4
0
1
1
N
4
1
4
8
Q403
2N4401
D411
1N4148
CLIP.4
D406
1N4148
D
4
0
9
1
N
4
1
4
8
OutA
2
VCC
1
VREF
5
IN-A
3
Sense
6
SW
7
INT
4
IN-B
8
OutB
9
GND
10
IC404
NJM2761
11
10
12
IC106C
SSM2164
3
2
9
7
8
4
5
1
6
JK403
3
2
1
IC403A
TL072
R437
30K
C419 100P
R
4
3
3
3
0
K
C417
1uF/50V
R435
499
C415
560P
14
15
13
IC106D
SSM2164
5
6
7
IC403B
TL072
R438
30K
C420 100P
R
4
3
4
3
0
K
C418
1uF/50V
R436
499
C416
560P
8
4
IC403C
TL072
C428
0.22uF/50V
C429
22uF/25V
R439
9.1K
2
3
1
SW402A
R421
220
R418
220K
+15V
CLIP-4
POW-4
VCL-4
VCR-4
JK401A
JK401B
BOARD CNA702
+15V
VCA-L
Clock
LCH-O
RCH-O
-15V
VCA-R
GND
CLIP
R424
15K
D408
1N4148
MUTE
LIMITER SW
OFF
ON
R440
1K
REMOTE VOLUME
C
4
2
6
0
.2
2
u
F
/5
0
V
C
4
2
5
0
.2
2
u
F
/5
0
V
C423
0.22uF/50V
C424
0.22uF/50V
C427
0.022uF/50V
RESET
reset
D404
1N4148
1
2
3
4
5
6
7
8
9
10
11
12
CNA105
CON7
CLIP-1
POW-1
VCL-1
BOARD-A CNB104
TO VOLUME CONTROL
CLIP-2
POW-2
VCL-2
CLIP-3
POW-3
VCL-3
VCR-1
VCR-2
VCR-3
VCL-4
VCR-4
VCL-5
VCR-5
POW-6
CLIP-6
VCL-6
VCR-6
CLIP-5
POW-5
+5V
1 3
2
VR401
B50K
1 3
2
VR402
B50K
R441
68
ZD401
12V
POWER
+15V
+15V
+5V
C
4
3
0
0
.1
u
F
MUTE MUTE
R
4
4
2
4
7
K
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