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4-3. SCHEMATIC DIAGRAM – MAIN Board (3/3) –
R112
R113
R114
470
220
4.7k
PWMR
C110
C113
C111
2200p
R213
220p
4700p
220
PWML
R212
R214
470
4.7k
C210
C211
C213
2200p
4700p
220p
D-NE330/NE331
• See page 16 for Waveforms. • See page 16 for IC Block Diagrams.
(3/3)
R108
C107
10
1000p
C207
R208
1000p
10
*
R104, R204
10k (EXCEPT NE330:FR)
22k (NE330:FR)
*
R105, R205
HEADPHONE AMP
33k (EXCEPT NE330:FR)
IC301
470k (NE330:FR)
BH35544F-FE2
R104
∗
C305
OUT1
VCC
C105
1
4.7
OUT2
XMUTE
R105
6.3V
∗
BIAS
IN1
IN2
R205
GND
C205
∗
4.7
C106
R106
R206
6.3V
470p
10k
10k
R204
∗
C206
470p
L302
D301
MA2Z748001S0
22µH
DC/DC CONVERTER
IC302
XC6367A281MR
GND
CE
VDD
C307
EXT
VOUT
47
4V
S
Q301
XP151A13A0MR
DC/DC CONVERTER
(NE330:US,CND)
C309
R111
R211
0.033
2.2
2.2
C108
220
R109
C109
C209
4V
1k
0.22
0.22
R110
0
FB101
R210
0
FB201
FB301
C208
R209
220
1k
4V
C303
22
6.3V
C304
0.1
C302
0.1
C301
100 6.3V
R302
680k
R307
220k
AMUTE
R308
Q302
1M
CPH3303-TL
Q303
C308
DTC115TUA
C306
1
-T106
100
6.3V
Q302,303
B+ SWITCH
11
11
J301
B5
B6
B7
(Page 9)
B3
B2
(Page 9)
C1
C2
C4
C3
(Page 10)
D-NE330/NE331
Ver. 1.3
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