![Alto APM 120 Service Manual Download Page 11](http://html.mh-extra.com/html/alto/apm-120/apm-120_service-manual_2911624011.webp)
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5
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7
8
9
10
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A
B
C
D
12
11
10
9
8
7
6
5
3
2
1
D
C
B
A
APM STEREO BOARD(
2/
3)
17V
-17V
C
198
100n
C
197
100n
8
U
34C
4580M
2
1
3
SW
38A
PS-
42E85L
5
6
SW
38B
PS-
42E85L
R
259
5K1
R
260
5K1
PFL
A
/PFL
A
/PFL R
A
PFL L
A
/PFL R
2
1
3
SW
39A
PS-
42E85L
5
6
SW
39B
PS-
42E85L
R
261
5K1
R
262
5K1
AF
L
A
/PFL L
A
/PFL R
A
PFL L
A
/PFL R
3
2
1
U
38A
4580M
5
6
7
U3
8
B
4580M
R3
7
0
4K99
R
368
10K0
R
369
10K0
R
374
19K1
R3
7
2
49K9
C2
3
6
473(
M
)
C2
3
5
473(
M
)
C
290
473(
M
)
R
371
19K1
R3
7
3
19K1
2
1
3
SW
40
SW
-2
W
AY
C1
1
9
47uF
/25V
VR
88A
D1
0
K
R
377
17K4
C6
7
22P
R3
7
5
5K1
R1
4
1
20K
3c
5e
1a
d
2b
X1
6
JY
-6351G-
02-
250
R3
5
1
120R
R3
5
2
120R
T
R
S
RN
TN
MONO OUT
MONO OUT
LPF
C
128
47uF
/25V
3
2
1
U
45A
4580M
R3
2
8
5K1
C7
3
22P
C1
3
2
47uF
/25V
5
6
7
U4
5
B
4580M
R3
3
0
5K1
C7
8
22P
R
317
17K4
R
318
17K4
VR
92B
W5
0
K
VR
92A
W
50K
3
2
1
U4
6
A
4580M
5
6
7
U4
6
B
4580M
R3
4
0
56K2
C7
5
22P
C1
3
3
47uF
/25V
R3
4
1
56K2
C
269
22P
C1
3
4
47uF
/25V
3
2
1
U
48A
BA15218N
5
6
7
U
48B
BA15218N
C7
9
22P
R
391
10K0
R3
6
6
120R
3c
5e
1a
d
2b
X2
8
JY
-6351G-
02-
250
R3
6
7
120R
R3
6
2
120R
R3
6
1
120R
3
2
1
U
47A
BA15218N
5
6
7
U4
7
B
BA15218N
R
390
10K0
C7
6
22P
A
/PFL L
A
/PFL R
A
PFL L
A
PFL R
R8
4
20K
R8
5
20K
PHONES
3
2
1
U
44A
4580M
R3
2
7
56K2
C7
2
22P
C1
2
9
47uF
/25V
5
6
7
U4
4
B
4580M
R
143
10K
C7
4
22P
R
142
10K
R8
2
20K
3c
5e
1a
d
2b
X2
3
JY
-6
351G-
02-
250
R3
6
3
120R
R3
6
4
120R
T
R
S
RN
TN
T
R
S
RN
TN
EFFECT
SEND
EFFECT
E
FFE
C
T
C
125
47uF
/25V
3
2
1
U
43A
4580M
R3
2
6
56K2
C6
9
22P
R3
1
6
5K1
VR
91A
D
10K
5
6
7
U4
3
B
4580M
R3
3
9
17K4
C7
1
22P
C1
3
1
47uF
/25V
R8
3
20K
A
UX3
A
UX3
3c
5e
1a
d
2b
X2
4
JY
-6351G-
02-
250
R3
5
8
120R
R3
6
5
120R
T
R
S
RN
TN
A
U
X SEND3
2
1
3
SW
46A
PS-
22E85L
R2
6
9
5K1
R2
7
0
5K1
AF
L
A
PFL L
A
PFL R
A
PFL L
A
/PFL R
C
124
47uF
/25V
3
2
1
U
42A
4580M
R3
2
5
56K2
C6
8
22P
R3
1
5
5K1
VR
90A
D
10K
5
6
7
U4
2
B
4580M
R3
3
8
17K4
C7
0
22P
C1
2
7
47uF
/25V
R8
1
20K
A
UX2
A
UX2
3c
5e
1a
d
2b
X2
2
JY
-6351G-
02-
250
R3
5
7
120R
R3
6
0
120R
T
R
S
RN
TN
A
U
X SEND2
2
1
3
SW
45A
PS-
22E85L
R2
6
7
5K1
R2
6
8
5K1
AF
L
A
PFL L
A
PFL R
A
PFL L
A
/PFL R
C
115
47uF
/25V
3
2
1
U
41A
4580M
R3
2
4
56K2
C6
5
22P
R3
1
3
5K1
VR
89A
D
10K
5
6
7
U4
1
B
4580M
R3
3
7
17K4
C6
6
22P
C1
2
6
47uF
/25V
R8
0
20K
A
UX1
A
UX1
3c
5e
1a
d
2b
X2
1
JY
-6351G-
02-
250
R3
5
0
120R
R3
5
9
120R
T
R
S
RN
TN
A
U
X SEND1
2
1
3
SW
44A
PS-
22E85L
R2
6
5
5K1
R2
6
6
5K1
AF
L
A
PFL L
A
PFL R
A
PFL L
A
/PFL R
3
2
1
U
34A
4580M
R3
2
2
56K2
C5
8
22P
5
6
7
U3
4
B
4580M
R
323
56K2
C5
7
22P
LEFT
-BUS
RIGHT
-BUS
LEFT
-BUS
RIGHT
-BUS
3
2
1
U
35A
4580M
5
6
7
U3
5
B
4580M
R3
3
1
10K0
C5
9
22P
C
111
47uF
/25V
R3
3
6
10K0
C6
0
22P
C
110
47uF
/25V
R
308
10K0
2T
K-OUT
-R
2T
K-OUT
-L
C
116
47uF
/25V
C1
1
7
47uF
/25V
9EQ IN-L
9EQ OUT
-L
R
314
10K0
EQ IN-R
9EQ OUT
-R
EQ
O
FF
EQ
O
N
R7
8
20K
R7
4
20K
VR
85A
W5
0
K
3
2
1
U3
6
A
4580M
R3
3
2
56K2
C6
1
22P
C1
1
2
47uF
/25V
R3
0
9
17K4
R3
1
0
17K4
VR
85B
W5
0
K
5
6
7
U3
6
B
4580M
R3
3
3
56K2
C6
2
22P
C1
1
8
47uF
/25V
VR
86A
D1
0
K
3
2
1
U3
7
A
4580M
R3
3
4
17K4
C6
4
22P
C1
1
3
47uF
/25V
VR
86B
D1
0
K
5
6
7
U3
7
B
4580M
R3
3
5
17K4
C6
3
22P
C1
1
4
47uF
/25V
R3
1
1
5K1
R3
1
2
5K1
3c
5e
1a
d
2b
X1
2
JY
-6351G-
02-
250
R3
4
2
120R
R3
4
4
120R
T
R
S
RN
TN
3c
5e
1a
d
2b
X1
3
JY
-6351G-
02-
250
R3
4
3
120R
R3
4
5
120R
T
R
S
RN
TN
3c
5e
1a
d
2b
X1
4
JY
-6351G-
02-
250
R3
4
6
120R
R3
4
8
120R
T
R
S
RN
TN
3c
5e
1a
d
2b
X1
5
JY
-6351G-
02-
250
R3
4
7
120R
R3
4
9
120R
T
R
S
RN
TN
ST
OUT
ST
SUB OUT
LE
FT
RI
G
HT
LE
FT
RI
G
HT
ST
OUT
ST
SUB OUT
R7
5
20K
R7
6
20K
R7
7
20K
R7
9
20K
L
-ME
TE
R
R
-ME
TE
R
L
-ME
TE
R
R
-ME
T
R
L
-ME
TE
R
R
-ME
TE
R
L
-ME
TE
R
R
-ME
TE
R
3c
5e
1a
d
2b
X1
7
JY
-6351G-
02-
2
50
T
R
S
RN TN
P.
A
M
P I
N
SERT
LE
FT
RI
G
HT
3c
5e
1a
d
2b
X1
8
JY
-6351G-
02-
2
50
T
R
S
RN TN
3
2
1
U4
0
A
4580M
R
386
10K0
C
238
680P
R3
8
0
36K0
C1
2
1
47uF
/25V
C1
2
2
47uF
/25V
5
6
7
U
40B
4580M
R
387
10K0
C2
3
7
680P
R3
8
1
36K0
C1
2
0
47uF
/25V
C1
2
3
47uF
/25V
R
379
36K0
R3
8
3
10K0
R
378
36K0
R3
8
2
10K0
2
1
3
SW
43A
SKA-
22-
06B
5
6
SW
43B
SKA-
22-
0
6B
POW
E
R A
M
P
1
2
3
SW
42A
SKA-
23-
0
6B
5
6
7
8
SW
42B
SKA-
23-
0
6B
L
-ME
TE
R
L
-ME
TE
R
R-M
ET
ER
R
-ME
TE
R
2
1
3
SW
41A
PS-
22E85L
R2
6
3
5K1
R2
6
4
5K1
AF
L
A
/PFL L
A
/PFL R
A
/PFL L
A
/PFL R
BRI
DG
E
LE
FT
R3
8
5
20K
R3
8
4
20K
C1
3
0
47uF
/25V
5
6
7
U
39B
4580M
R3
2
9
10K
C7
7
22P
R1
4
4
10K
R1
4
5
20K
C
200
100n
C
199
100n
8
U
35C
4580M
C
202
100n
C2
0
1
100n
8
U
36C
4580M
C2
0
4
100n
C2
0
3
100n
8
U
37C
4580M
C2
0
6
100n
C2
0
5
100n
8
U3
8
C
4580M
C
208
100n
C2
0
7
100n
8
U3
9
C
4580M
C2
1
0
100n
C
209
100n
8
U
40C
4580M
C2
1
2
100n
C2
1
1
100n
8
U4
1
C
4580M
C2
1
4
100n
C2
1
3
100n
8
U
42C
4580M
C2
1
6
100n
C2
1
5
100n
8
U4
3
C
4580M
C2
1
8
100n
C2
1
7
100n
8
U4
4
C
4580M
C2
2
0
100n
C2
1
9
100n
8
U
45C
4580M
C2
2
2
100n
C2
2
1
100n
8
U4
6
C
4580M
C2
2
8
100n
C
227
100n
8
U4
9
C
4580M
FR
EQ
PHONES
1
2
3
5
6
CN4 CO
N6
A
UX
A
UX
R2
4
1
20K
R2
4
2
20K
2T
K
-OUT
-R
2T
K
-OUT
-L
3
2
1
U
57A
4580M
R
356
10K
C2
8
4
22P
C2
8
6
47uF
/25V
R3
7
6
10K
R
295
20K
5
6
7
U
57B
4580M
R
355
10K
C2
8
5
22P
C2
8
7
47uF
/25V
R4
5
5
10K
R
353
20K
C2
8
9
100n
C2
8
8
100n
8
U5
7
C
4580M
R
354
20K
3
2
1
U3
9
A
4580M
VR
87A
100KB
VR
87B
00KB
8
U
47C
BA15218N
8
U
48C
BA15218N
C2
2
3
47u/25V
C2
2
4
47u/25V
C2
2
5
100n
C2
2
6
100n
17V
-17V
C
234
473(
M
)
2
1
3
SW37A
PS-
2E85L-2
5
6
SW37B
PS-
2E85-C
5
6
7
U5
8
B
4580M
R
479
8K66
R4
7
5
10K0
R
469
22K
C2
9
7
33P
3
2
1
U
58A
4580M
C3
0
3
47uF
/25V
C3
0
4
47uF
/25V
R5
1
1
15K0
R
468
22K
R
501
11K0
R5
0
8
68R
0
5
6
7
U5
9
B
4580M
R4
8
0
8K66
R
502
11K0
R
471
22K
C2
9
8
33P
3
2
1
U
59A
4580M
C3
0
6
47uF
/25V
C3
0
5
47uF
/25V
R4
7
3
15K0
R
470
22K
R5
0
9
68R
0
R5
1
0
68R
0
LEFT
RI
G
HT
C2
9
9
33P
R4
7
2
15K0
R5
0
7
68R
0
C2
9
6
33P
R
504
18K
C
295
33P
R5
0
3
18K
R4
7
6
10K0
R4
7
8
10K0
C3
0
33P
R
506
18K
C
300
33P
R5
0
5
18K
C
302
33P
R4
7
4
15K0
R4
7
7
10K0
C
291
100n
C2
9
2
100n
C2
9
3
00n
C2
9
4
100n
8
U5
8
C
4580M
8
U5
9
C
4580M
ZD4
5V
1
ZD6
5V
1
ZD5
5V
1
ZD7
5V
1