1 2 3 4

+14V DC
4

U1A
R14 C13 R9
3
1+ OP1
V+ 1
+

2K2 1out 6K8

D R19 C10 D
10K 330pF 2 V- 100uF/16V
1-

4
MC33079P-2060D C17 C7 C8 U1C
JK3 VR1A 10 OP5
11

-14V DC 3+ R38
2 V+ 8
1 R12 R11 3out
3 2*5K lin 47nF 47nF 47nF R10 100R
2 100K9 R26
22K 100K V-
3 R1 R28 3- 10K
1 MC33079P-2060D
XLR input left R13 C9 47K 18K
22K 11
C27**
33pF VR2B
5K Lin
SAT FILTER LEFT 110Hz C5
R18 220nF
10K JK4
R6 180 10 ground

4
8K2 U2C 3 SW1 C24 U2D
R41 R7 R30 R8 9 Audio Sat left
10 OP7 1 12 OP8

+
4 3+ 4+ R39 8 ground
C1 C2 C3 C4 U2B V+ 8 2 3.3K 18K 22K 22K V+ 14
3out 4out 7 Audio Subwoofer
5
2+
OP4 0 100uF/16V 100R 6 ground
V+ 7 R17 9 V- R42 10R 13 V- R27
2out 3- 2Pole slide switch 4- 5
C 4n7 100nF 100nF 100nF R5 MC33079P-2060D VR2A MC33079P-2060D 10K Audio Sat right C
10K C26** C19 C25** C6 4
LEVEL MAIN 180K 6 V- 5K Lin ground

11

11
R3 R4 2- D4 D5 68nF 10nF 3 +46V DCplus
JK2 MC33079P-2060D
24K 2 ground
1 left 150K
11

1 -46V DC minus
+14V DC
2 1N4148 1N4148
3
right
4

U2A
RCA input 3
1+
OP3 D3 D6 subfilter 130Hz
V+
1out
1 Phasereverse LEVEL SUB
SUB sonic 30Hz 1N4148 1N4148
2 V-
1-
MC33079P-2060D
D2 D7
11

-14V DC 1N4148 1N4148

sublimiter
4

U1B
R23 C16
2+ OP2
5
C15 V+ 7 R15 Tr2
+

2K2 2out R43 3K3/0.5W

R24 BD139-10
10K 6K8 +14V DC
B 330pF 6 V- 100uF/16V R2 B
2- 47K R33 3K3/0.5W R31 R45
4

MC33079P-2060D C18 C11 C12 U1D D1

VR1B 12 OP6 + C28 22K 22K 1N4148
11

4+
JK1 2*5K lin V+ 14 R40 10uF/63V
47nF 4out
2 47nF 47nF 100R
1 R21 R20 R25 ZD1
3 13 V-
2 R29 R16 4- 10K C22 15V/0.5W R36
22K 100K MC33079P-2060D + +
3 18K 100K 100uF/16V C20 3K3/0.5W
1
11

XLR input right R22 C14 100uF/16V

22K 33pF
R35
+ ZD2 3K3/0.5W
+ C29 C21 15V/0.5W
Voltage supply 10uF/63V 100uF/16V
SAT FILTER Right 110Hz
+ C23 LED1
100uF/16V 3mm red
Power on
R32 R46
Tr1 22K 22K

R34
A -14V DC A
BD140-10 3K3/0.5W
Title
R44
AMP3120 V1.0
3K3/0.5W
Size Number Revision
B
Date: 16-Jan-2013 Sheet of
File: E:\AMP\AMP3120\Milly\3120.DDB Drawn By: guolijuan
1 2 3 4
 1 2 3 4

+46V
+
R22 C9
3K3 470uF/16V Tr11
2SA970GR

R23 pop up supr

10K

ZD2 R27
10V/0.5W 1K2 C12

R29 R28 100pF

6K8 6K8 Tr5
R8 2SC4793

D 220R Power supply D

Tr7
Satellite Left R10 2SC5200 O DC-plus +46V
10R
+ C10
+14V J4 470uF/50V
J3
3
R14
2
ground 1
R19 1K8
7K5 C4 protect1 1
+ +
mute 10uF/16V R36 frompower supply PCB C11
R13 Tr8 1K1 470uF/50V
R17 R18 1K 2SC2240GR DC-minus
R30 100R 100R -46V
10K Tr9 R16
+ C14 R25 2SC2240GR J7
22R
Tr1 Tr2 1uF/63V 100R R6 SAT-L
C1 0R33/5W 1
R2 R5 R4 L1
+

AMP-OUTSatL
1K8 220R 7K5 2uH
100uF/16V Tr12 Tr13 R7
C2 BC546B BC546B R24 2SA970GR 2SA970GR R3 R35 0R33/5W
10K 470R 100R R15 R26
1nF 22R 22R
+ C3 R12
100uF/16V 100R
C6
J1 100nF
ground 10 R11
audio input Sat-L 9
Tr6
ground 8 10R
2SA1943 O
audio input Sub 7
C5
ground 6 R9 Tr4
audio input Sat-R 5 470R 2SA1837
ground 4
100pF
powersupply plus 3 +46V
ground 2
C13
powersupply minus 1 -46V
R1 Tr3 short circuit protection
680R MJE340 100pF
-46V
+46V

+46V R32
R31 3K3 Tr15
3K3 Tr14 2SA970GR
Tr26 2SA970GR
2SA970GR R34
pop up surp R38 R39 R40 33K
C C
10K 10K 10K
R37 mute
C16 10K
R33 + C17
R63 10nF/63V 100K Tr16 1uF/63V
1K2 C24 D1 D2 D3 2SC2240GR
BAV21 BAV21 BAV21

Subwoofer R65 R64 100pF protect1 protect2 protect3

6K8 6K8 Tr21
R48 2SC4793

220R
Tr23 D1+D2+D3: BAV21 or other diode with URRM>150V and 200mA
R50 2SC5200 O
10R
+14V

R54
R59 1K8
7K5 C21 protect2
+
mute 10uF/16V R68 Voltage of input transistors
R53 Tr24 1K1
R57 R58 1K 2SC2240GR
R66 100R 100R
10K R56 +46V
Tr25
+ C26 R61 2SC2240GR J8 R21
22R
Tr17 Tr18 1uF/63V 100R R46 Sub 2K2
C18 0R33/5W 1
R42 R45 R44 L2
+

AMP-OUTSub R20 C15

7K5 +
1K8 220R 2uH
100uF/16V Tr27 Tr28 R47 33K Tr10 1uF/63V
C19 BC546B BC546B R60 2SA970GR 2SA970GR R43 R67 0R33/5W BC546b
10K 470R 100R R55 R62
1nF 22R 22R ZD1 + C7
+ C20 R52 15V/0.5W
100uF/16V 100R 10uF/16V +14V
C23
100nF + C8
100uF/16V
R51

10R Tr22
R49 2SA1943 O
C22 470R
Tr20
2SA1837
100pF

B C25 B

R41 Tr19
680R MJE340 100pF
-46V

+46V

Tr38
2SA970GR
pop up surp

R91
1K2 C33

R93 R92 100pF

6K8 6K8 Tr33
R76 2SC4793
Satellifier Right 220R
Tr35
R78 2SC5200 O
10R
+14V

R82
R87 1K8
7K5 C30 protect3
+
mute 10uF/16V R96 Notice:
R81 Tr36 1K1 Tr8,Tr24,Tr36 are quiescent current transistors.
R85 R86 1K 2SC2240GR place them between power transistors close to heatsink.
R94 100R 100R
10K Tr37 R84
+ C35 R89 2SC2240GR J9
22R
Tr29 Tr30 1uF/63V 100R R74 SAT-R
C27 0R33/5W 1
R70 R73 R72 L3
+

AMP-OUTSatR
1K8 220R 7K5 2uH
100uF/16V Tr39 Tr40 R75
C28 BC546B BC546B R88 2SA970GR 2SA970GR R71 R95 0R33/5W R83 R90
10K 470R 100R 22R 22R
1nF
+ C29 R80
A 100uF/16V 100R C32 A
100nF

R79
10R Tr34
R77 2SA1943 O
C31 470R
Tr32
2SA1837
100pF

C34

R69 Tr31
680R MJE340 100pF Title
-46V
AMP3120 amplifier V1.0
Size Number Revision
B
Date: 16-Jan-2013 Sheet of
File: E:\AMP\AMP3120\Milly\3120.DDB Drawn By: guolijuan
1 2 3 4