Audio research ls 22 schematic 2

Page 1

5 POSITION SELECTOR SWITCH

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TAPE OUT J"
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1K3 21K

N

J12
TAPEINPUT J13
0 35 2
RY1
TAPEMON .1 J
RELAY nvz

+IBOV

rm
1 ma) vam 1 1"

E RVI

1 00K
GAIN

R7A||B
1.5K

-89V

L822 PREAMPLIFIER

AUDIO
PAGE 1 OF: 6-23-95

R10
1K

n29
fl'PL : : : 5-"; m
5-H- - . I - W: 5° I
I I +ozv moAIIBI I I I on m "5
I I 15 21.5K I I Ifi25 I I I HYs ,
I I 475K; I I I 15K; I +115v MUTE
SE/BAL I I I I I I 27 RELAY 2
RELAY I I I I I I IMEG 1FD
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: : : we; 3
-- I I I 824 I 1M5 HY4
Y3 " R A . . . 15K; . +115v MUTE
475K "21:5. I I I cm .01 RELAY
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C4 .01 I I I cal 5.0 R23
c2"5.o' ' ' csnso

+1BOV

AUDIO RESEARCH CORPORATION

5740 GREEN CIRCLE DRIVE
umNETouKA. MINNESOTA 553434424

PROPRIETARY NOTICE THIS DRAWING CONTAINS PATENTED, PATENT
APPLIED FOR, AND/0H OTHER CIRCUITHY CONSIDERED PROPRIETARY
3! AUDIO RESEARCH CORPORATION AND IS FURNISHED ON A
CONFIDENTAL BASIS FOR IDENTIFICATION PURPOSES ONLY.

Page 2

TIMER AND LOW IJNE MUTE

R34 D1 n35
33 m mew 1" 4 3
1° 6 LE1 _
01 U2 021
2mm 2 Messs 3 37 1N916
1 1K
m: + 0 ans
C11 76.8K 2 C13 R35 R38 MUTE RELAYS
22 12 2N4401 .1 237 3.16K
as
\
rm
EAL/SE RELAYS
' ' C
ms as
MONITOR sounce C16 5.1m 1N916
2
H51 06
05 C17" .22
arms: u - 10K 2mm;
C18 ,22
- MUTE
swa
1,2. écwlmz _ 52% R52
SOURCE] I 10Kv 5.1m
mourron C20 .22
2144401 RELAYS ---II----» 07
R49 De 2mm
100K mm
C .

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L522 PREAMPLIFIER

MUTE AND SWITCHING
PAGE 2 OF 3 6-23-95

AUDIO RESEARCH CORPORATION

5740 GREEN CIRCLE DFIIVE
MINNETONM MN W24

PROPRIETARY NOTICE: THIS DRAWING CONTAINS PATENTED,
PATENT APPUED FOR. AND/OR OTHER CIRCUITHY CONSIDERED
PROPRIETARV BY AUDIO RESEARCH CORPORATION AND IS
FURNISHED ON A CONFIDENTAL BASIS FOR IDENTIFICATION
PURPOSES ONLY.