LTO AMX 220FX-USB, Service Manual

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1 2 3 4
A
B
C
D
4 3 2 1
D
C
B
A
D +
1
D -
2
V BU S
3
D G N D
4
H ID 0
5
H ID 1
6
H ID 2
7
SEL0
8
SEL1
9
V CCCI
10
A G N D C
11
V IN L
12
V IN R
13
V CO M
14
V O U TR
15
V O U TL
16
V CCP1I
17
A G N D P
18
V CCP2I
19
X TO
20
X TI
21
A G N D X
22
V CCX I
23
D IN
24
D O U T
25
D G N D
26
V D D I
27
SSPD N
28
U1
PCM2902
1 2
R4 22R
R3 22R
R5
1K5
U SB_G N D
D G N D
C6
10uF
C5
10uF
A G N D
C4 10uF
C3 10uF
C13 1uF
C12 1uF
C11 1uF
X1
12MHz
C8
22P
D G N D D G N D
C9
22P
C10 1uF
D G N D
D G N D
C2
10uF
C1
10uF
C7
100uF
R2
0R
+5V
U SB_G N D
R6 10M
A G N D
U SB_G N D
V IN L
V IN R
V O U TL
V O U TR
A M X -U SB
R9
10R
R7
1K5
C26
1n
3
2
1
U2A
4580M
R14
3K9
C24
4.7nF
R12
12K
R10
4K7
C20
10uF
C14
330P
A G N D A G N D
R18
100R
R8
1K5
C27
1n
5
6
7
U2B
4580M
R15
3K9
C25
4.7nF
R13
12K
R11
4K7
C21
10uF
C16
330P
A G N D A G N D
R19
100R
1
2
3
4
5
6
7
8
9
10
11
12
CN1
CON12
D -
D +
+5V
C28
220P
3
2
1
U3A
4580M
R24
18K
C29
220P
5
6
7
U3B
4580M
R25
18K
R16
3K9
R17
3K9
R22
27K
R23
27K
C18
1.8nF
A G N D
C15
1.8nF
A G N D
R20
100R
R21
100R
C19
330P
A G N D
C17
330P
A G N D
C23
10uF
C22
10uF
+V CC
-V CC
C30
100n
C32
100n
+V CC
-V CC
C31
100n
C33
100n
8
4
U2C
4580M
8
4
U3C
4580M
A G N D
A G N D
IN
IN
G
G
OUT
OUT
TR1
A 1117
C34
100n
R26
3K16
R1
1K82
3.6V ~3.8V
D G N D
L1
BLM21
C35
100n
U SB_G N D
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