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A B C D E




RH12

47K
U11A U12A RH11 U15A
1.5K CW
NJM4560L NJM4560L NJM4560L
+15V +15V +15V
RCA1 C106A VH11-A +15V




8
8
8
C101 R101
1CH INPUT 10u C105 10u CH11 CH12 50K C141




8
4 22K 10u 104M 4




+
+
104M 2C3P 4.7u




BY
3 3 C111 3




+
+
1 1 3 224M 1
HIGH 1CH
R103 2 2 1 2
C103
56P 27K 2
R104 CW
R110A R111
10.5K RH13 U13A R126
27K C106 9.1K 3.74K NJM4560L
R120 R121 4.7K
102C




LOW
C102 R102 VS11-B 10K 100K C113 C114
10u 22K CW 123M 123M




+
C104 C107
56P 150P VH11-D
R109 50K
R105 910 R110 R124
82 3K 100K
R122
27K
C115
CL11 683M
124M
RCA1 RL11 VB11-A
L-CH OUT R107 1CH PRE OUT 500K R123 R125
1,2CH 13.7K 150K 150K
8.2K CW
SW11A U14A +15V
NJM4560L




8
2C2P RL12
3,4CH CW CW 13.7K
R108 3CH PRE OUT 3
47K VL11-B VL11-A 1
3 2 3
50K 50K
CL12
473M




RH22

47K
RH21
1.5K CW

-15V -15V -15V
RCA1 U11B VH11-B -15V




4
4
4




C201 R201 50 K
2CH INPUT 10u NJM4560L C205 U12B CH21 CH22 4 C241
22K NJM4560L
BY




C206A 104M




+
5 10u 5 104M SW12B C211 5 4.7u
10u




+
+




7 7 5 2C3P 224M 7
R210 HIGH 2 CH




+
R203 6 6 7 6
C203
56P 27K 10K 6
U15B
2 R204 CW R211 U13B NJM4560L 2
RH23 R226
27K C206 40.2K 3.74K NJM4560L
R220 R221 4.7K
102C
LOW




C202 R202 VS11-A 10K 100K C213 C214
10u 22K CW 123M 123M
20K




+
C204 C207
56P 33P VH11-C
R209 50K
R205 910 R224
82 100K
R222
27K
C215
CL21 683M
124M
RL21 VB11-B
RCA1 500K R223 R225
R-CH OUT 2CH PRE OUT 13.7K
R207 1,2CH 150K 150K
8.2K CW
SW11A +15V
4




2C2P RL22
3,4CH CW CW 13.7K
R208 4 C H P R E OU T 5
47K VL11-D VL11-C 7
50K 50K 6
CL22 U14B
473M NJM4560L

1 1




Title
MB4.400-INPUT 1,2CH
Size Document Number Rev
Custom D-E-MB9754I-10 0
Date: Monday , Ju ne 13 , 2 005 Sheet 1 of 5
A B C D E
A B C D E




RH32

47K
U31A U32A RH31 U35A
1.5K CW
NJM4560L NJM4560L NJM4560L
+15V +15V +15V
RCA1 C306A VH31-A +15V




8
8
8
C301 R301 50K
3CH INPUT 10u C305 10u CH31 CH32 C341




8
4 22K 10u 104M SW32A 4




+
+
3 3 104M C311 3 4.7u




BY
2C3P




+
+
1 1 3 224M 1 3CH
2 2 1 HIGH 2
C303 R303
56P 27K 2
R310A R326
R304 CW R311 U33A R320 R321 C313 C314 4.7K
10.5K RH33
27K C306 9.1K 3.74K NJM4560L 10K 100K 123M 123M
102C




LOW
C302 R302 VS31-B
10u 22K 20K CW




+
C304 C307
56P 150P VH31-C R324
R309 100K
50K R322
R305 910 R310 27K
82 3K C315
683M
VB31-A
CL31 500K R323 R325
3CH PRE OUT 124M 150K 150K
CW
RL31
13.7K
3,4CH
SW31A
U34A +15V
2C2P NJM4560L




8
1,2CH RL32
CW CW 13.7K
1CH PRE OUT 3
VL31-B VL31-A 1
3 3
50K 50K 2
CL32
473M




RH42

47K
RH41
1.5K CW

-15V -15V -15V
RCA1 U31B VH31-B -15V U35B




4
4
4




C401 R401 50K
4CH INPUT 10u NJM4560L C405 U32B CH41 CH42 NJM4560L C441

4
22K SW32B
BY




10u C406A 104M




+
5 5 NJM4560L 104M C411 5 4.7u
10u 2C3P




+
+




7 7 5 224M 7 4CH
R410 HIGH




+
R403 6 6 7 6
C403
56P 27K 10K 6
2 R426 2
R404 CW R411 RH43 U33B R420 R421 C413 C414 4.7K
27K C406 40.2K 3.74K NJM4560L 10K 100K 123M 123M
102C
LOW




C402 R402 VS31-A
10u 22K 20K CW




+
C404 C407
56 P 33P VH31-D R424
R409 100K
50K R422
R405 910 27 K
82
C415
683M
VB31-B
CL41 500K R423 R425
4CH PRE OUT 124M 150K 150K
CW
3,4CH RL41
13.7K
SW31B -15V
2C2P
4




RL42
1,2CH CW CW 13.7K
2CH PRE OUT 5
VL31-D VL31-C 7
50K 6
50K
CL42 U34B
473M NJM4560L
1 1




Title
MB4.400-INPUT 3,4CH
Size Document Number Rev
Custom D-E-MB9754I-20 0
Date: M onday , J une 13, 2005 Sheet 2 of 5
A B C D E
A B C D E



V CC

R149 R151 C144 Q108 Q11 0
1K 47 100P D600 TIP35C R166
10K
Q105 PROTECT
A1023
R162
Q10 1 680 Q 12 1
C3198 Q1 03 C3198
C3198 VEE
4 4
+
+ C143




1/50
C148
+15V -15V 33/25 R155




RX11
4.7K R158




10K
0.1/5
R143 R144 R154
R148 100 10 0 1K




R157
8.2K
C146




220 1/4W
104M
Q107 C149 D102 D101 C147
R147 R156 C3112 10P 1N4148 1N4148 104M
R153 R159




RX12
10K
8.2K R145 R146 1.8K 15K 0.1/5
100 100

R163
R140 R141 C145 680 R168 R164 R165
2.7K 100P 22.1K 22.1K 4.7/1W
2.2K
1CH
Q1 02 Q1 04
A1266 A1266

Q106
R501 C142 C1027
100K R142 680P
Q5 02 10K
K30A
3 R150 Q10 9 Q111 3
1K R152 B631
47 TIP36C


TER1

4
CX1 1CH+
MUTE
103M 3