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:POSITIVE VOLTAGE LINE
:PLAYBACK SIGNAL LINE
D
C
F
E
I
J
G H
K
36 35 34 33 32 31 30 29 28 27 26 25
R31
C22
220K
0.1
1.7V
37
SOFT
C20
1
0V
SPRT
38
2.5V
39
RESET1
1.5V
40
REGOUT
0V
IC11
41
OFF/START
C0DBFFB00005
42
CD/TU
R22
C21
0.9V
POWER SUPPLY/
EI
43
22K
2200P
MOTOR DRIVE
3V
44
EO
0.5V
C19
6.3V22
45
CRIP
C10
(0V) 2.5V
46
CHARGE
270P
47
GND
2.5V
VMIC
48
1 2 3 4 5 6 7 8 9 10 11 12
GND
V
DD
L
R
a
C9
1
25
26
27
N
f
K
R29
56
0V (0.2V)
FO-
24
L
0V
FO+
23
M
0V
TR-
22
N
0V
TR+
21
O
0V
TRV-
20
P
0V
TRV+
19
Q
0V (0.6V)
SPOUT
B
18
0V
SPPOL
17
A
GND
16
1.2V
CLK
15
3.7V (2.9V)
PVcc1
14
Q301
3.9V
PVcc2
13
UN521MTX
RESET
2.5V
V
S
J
M
Q19
UN521MTX
RESET
2.5V
(0V)
2.5V
Y
Z
B
C
D
A
28
29
30
0V
4.1V
Q15
B1GBCFJG0004
DC IN DET.
(AC ADAPTOR)
Q11
2SB1182TLPQR
R21
REGULATOR
10
R28
270
2.5V
Q16
UN5113TX
RESET
0V
2.5V
0V
Q14
UN5114TX
CHARGE CONT.
R10
(0V)
270
2.5V
2.4V
(0V)
0.7V
Q13
UN521LTX
0V
CHARGE CONT.
(2.5V)
R13
1K
Q902
UNR521000L
MUTING CONT.
(2.5V)
0V
0V
0V
2.5V
(2.5V)
Q901
0V
UN5114TX
(2.5V)
MUTING CONT.
2.5V
0V
2.4V
Q905
(-0.2V)
UN5215TX
MUTING CONT.
C705
R703
R705
4V220
5.6
2.2
R701
0V
560
0.7V
Q704
(-0.2V)
B1GFGCAA0001
MUTING
0.7V
(-0.2V)
R702
0V
560
C706
R704
R706
4V220
5.6
2.2
31
32
17
SL-CT520EB / SL-CT520EG / SL-CT520EE / SL-CT520SG
R1
ICP11
ERBSE1R00U
CN12
(2.9V)
3.5V
3.7V
C
4.1V
S
R16
100K
C712
Q12
0.1
B1ABMD000004
CHARGE CONT.
(2.5V)
(0V)
(0V)
0V
0.7V
0.7V
0V
R904
1K
2.5V
Q903
UN5113TX
BUZZER CONT.
0V
R956
K
33
S
G
G
R
L903
L
L902
SL-CT520(EG,EB,EE,SG) CIRCUIT DIAGRAM
33
34
35
H
JK12
EXT BATT
2R03/LR03(UM-4)
BATTERIES
3V
G
JK11
DC IN
4.5V
F
E
D
C
JK701
HEADPHONE
B
A
36
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