4-7
SCHEMATIC DIAGRAM OF DC/DC BOARD
TO
AC/DC
BOARD
CN3
TO
CODEC
BOARD
(TO J16)
D302
D303
C312
0.33
D301
DGND
C313
10
C301
10
C300
10
DGND
L301
10
DGND
R305
1k
R310
240
R309
3k
R303
OPEN
R304
OPEN
L201
10
R203
OPEN
D201
DGND
D203
R209
3k
C212
0.33
DGND
D202
R205
1k
R204
OPEN
R206
100
IC200
1
R/C
2
Vref
3
OSC
4
GND_1
5
LC
6
VCC
7
Vboot
8
P.GND1
9
VGL
10
N/C_1
11
VOUT_1
12
VOUT_2
13
VOUT_3
14
VOUT_4
15
N/C_2
16
P.GND2
17
N/C_3
18
VDD_1
19
VDD_2
20
VDD_3
21
VDD_4
22
N/C_4
23
VGH
24
VB
25
OCL+
26
GND_2
27
OCL–
28
ampOUT
29
amp–
30
ampIN
31
2.5V/3.3V
32
S/S
C213
10
C1
13
10
IC100
1
R/C
2
Vref
3
OSC
4
GND_1
5
LC
6
VCC
7
Vboot
8
P.GND1
9
VGL
10
N/C_1
11
VOUT_1
12
VOUT_2
13
VOUT_3
14
VOUT_4
15
N/C_2
16
P.GND2
17
N/C_3
18
VDD_1
19
VDD_2
20
VDD_3
21
VDD_4
22
N/C_4
23
VGH
24
VB
25
OCL+
26
GND_2
27
OCL–
28
ampOUT
29
amp–
30
ampIN
31
2.5V/3.3V
32
S/S
R106
100
R104
OPEN
R105
1k
D102
DGND
C1
12
0.33
R109
5.1k
C103
10
C100
10
D103
DGND
D101
R101
100k
R102
OPEN
R103
OPEN
D100
L101
10
C106
1000p
C101
10
IC300
1
R/C
2
Vref
3
OSC
4
GND_1
5
LC
6
VCC
7
Vboot
8
P.GND1
9
VGL
10
N/C_1
11
VOUT_1
12
VOUT_2
13
VOUT_3
14
VOUT_4
15
N/C_2
16
P.GND2
17
N/C_3
18
VDD_1
19
VDD_2
20
VDD_3
21
VDD_4
22
N/C_4
23
VGH
24
VB
25
OCL+
26
GND_2
27
OCL–
28
ampOUT
29
amp–
30
ampIN
31
2.5V/3.3V
32
S/S
C303
10
R301
100k
R302
OPEN
D300
C306
1000p
R306
100
L100
3.3
L300
3.3
E400
1
V12A
2
V12B
3
GND
4
V5A
5
3.3V
6
GND
7
V3.3
8
V3.3
9
GND
10
GND
DGND
R107
22
R207
22
R307
22
R308
1k
R208
1k
R108
1k
CN400
1
12V
2
12V
3
12V
4
12V
5
GND
6
12V-3.3V
7
12V-5V
8
12V-5V
9
GND
10
12V-5V
C102
180/16
C302
180/16
C
111
220/6.3
C21
1
220/6.3
C31
1
220/6.3
L102
3.1
L202
3.1
L302
3.1
C314
220/6.3
C214
220/6.3
C1
14
220/6.3
C304
0.1
C208
0.1
C108
0.1
C104
0.1
C308
0.1
C310
1
C209
1
C309
1
C109
1
C210
1
C105
1
C305
1
C1
10
1
R300
R100
5A
5A
5A
C200
10
C201
10
L200
3.3
C202
180/16
R200
C307
0.01
R1
10
270
R210
240
SCR100
SCR200
SCR300
C107
0.01
C203
10
R201
100k
R202
OPEN
D200
C206
1000p
C204
0.1
C205
1
C207
0.01
Important safety notice
Components identified by " " mark have special characteristics for safety.
When replacing any of these components, use only manufacture's specified parts.
DC/DC BOARD
1
A
B
C
D
2
3
4
5
DC/DC BOARD
IC100 D3
IC200 B3,C3
IC300 A3,B3
D100 D2
D101 D3
D102 D4
D103 D4
D200 C2
D201 B3
D202 C4
D203 C4
D300 A2
D301 A3
D302 A4,B4
D303 A4
<INDEX>