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1

2

3

4

5

C10 47UF

6

7

8

A

-BAT

-BAT +BAT GND C11 47UF R17 R18 11 -BAT R45 2.2K R44 100R R43 100R 1 3 2 GND R23 R24 R21 10K 10K 10K 10K R67 56K 5 6 11 R19 R20 10K 10K 10K 10K C13 100PF 3 2 11 4 U2A TL074 1 W

+BAT

4

R1 2.2K B 3 3 C2 10UF 2 1 Q2 2N4403 Q1 2N4403 2 1

3 2 11

1

R9 2.2K

10 9

4

R61 18K

R62 18K

+BAT U1A TL074

+BAT

R63 18K

R64 18K

+BAT U1C TL074 8

-BAT R65 20K

3

-BAT R47 2.2K R48 100R

C6

10UF

2 1

Q8 2N4403

Q7 2N4403

3

2 1

A Format Mic Input Pin 1 = LFU Pin 3 = LBD Pin 5 = RBU Pin 7 = LFD 1 2 3 GND 4 5 GND 6 7 GND 8 GND D J1 MLXM8

R50

2.2K R2 15K GND GND

C1 100UF

R3 100R

R59 15K +BAT

R4 100R R46 100R 1 3

R49

2.2K R10 15K GND GND

C

2

C5 100UF

R11 100R

R60 15K +BAT

R12 100R

B Format output to UHJ encoder +BAT 4 U2B TL074 7 X R33 R34 R35 R36 47R 47R 47R 47R GND J3 MLXM5

GND

1 2 3 4 5

-BAT

-BAT

R22

R66 -BAT 56K

GND +BAT R56 18K R57 18K 5 6 11 +BAT 4 U1B TL074 7 +BAT R53 18K R54 18K 12 13 11 +BAT 4 U1D TL074 14 C12 47UF R31 R32 R29 R30 10K 10K 10K 10K R69 56K 12 13 11

C14 47PF GND +BAT 4 U2D TL074 14 Y

1 2 3 4 5

J2 MLXM5

R5 2.2K

R13 2.2K

B Format output to panel socket

3

3

E

2 1

2 1

C8

10UF

R39 2.2K R38 100R 3 R52 2.2K

2 1

Q6 2N4403

Q5 2N4403

3

C4

10UF

Q4 2N4403

Q3 2N4403

3

-BAT

2 1

-BAT R42 2.2K R41 100R

R70 -BAT 56K

R51

2.2K R6 15K GND GND

+BAT

R37 100R 1

2

GND

F

GND GND

+BAT

R40 100R 1

3

C3 100UF

R7 100R

R58 15K

R8 100R

C7 100UF

R14 15K

R15 100R

R55 15K

R16 100R

GND

2

C15 47PF

GND C9 47UF

R28 Power input from battery J5 MLXM5 1 2 +BAT 3 4 GND 5 -BAT Power output to UHJ encoder J4 MLXM5 1 2 +BAT 3 4 GND 5 -BAT R25 R26

10K 10K 10K R68 56K

10 9 11

4

R27

10K

+BAT

U2C TL074 8 Z

R71 -BAT 56K

G

GND

C16 47PF

H

mini_sooundfield01 DESIGN: NAME: mini soundfield TITLE: FILE: mini_soundfield01-01.sch Pre-Amps, B-Format Matrix CREATED: 18/08/03 MOD: 27/10/2003 SHEET: 1 OF 2 REV: 1.0 SIZE: A3

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