Arcam Preamp Processor AV8 User Manual
Page 97
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ISSUE
DRAWING NO.
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DRAWING TITLE
Drawn by:
DATE
Filename
ECO No.
DESCRIPTION OF CHANGE
J:\Change_Control\ECO_WIP\02_E143 L921 add 2 jumper links\L921_1.2.ddb - Documents\L921C3_1.2_gainrange.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
L921CT - AV8 audio board gain range section
Circuit Diagram
L921C3
AD/SUBCON
16-Jul-2002
INITIALS
Date Printed
3
9
Sheet
of
Notes:
3
2
1
IC301A
OPA2134PA SM
TP1
0V_SIG
5
6
7
IC301B
OPA2134PA SM
3
2
1
IC303A
OPA2134PA SM
5
6
7
IC303B
OPA2134PA SM
ANALOGUE L MIX
ANALOGUE R MIX
GAIN RANGE A
GAIN RANGE B
GAIN RANGE C
FROM MAIN GR L
A-D GROUND REF
TP3
AN-R
AN-L
-15V
+15V
0V_SIG
8
4
IC303C
OPA2134PA SM
-15V
+15V
0V_SIG
8
4
IC301C
OPA2134PA SM
R304
15K 0805
R310
30K 0805
R302
30K 0805
R305
4K3 0805
R312
4K3 0805
R303
30K 0805
R306
4K7 0805
R307
4K7 0805
R313
4K7 0805
R314
4K7 0805
C314
100N 0805
C316
100N 0805
C304
100N 0805
C306
100N 0805
C305
1N 0805
C307
1N 0805
C315
1N 0805
C317
1N 0805
FROM MAIN GR R
C301
33P NPO 0805
C303
33P NPO 0805
C308
33P NPO 0805
C310
33P NPO 0805
1Y0
12
1Z
14
2Z
15
1S
11
2Y1
1
3Y0
5
2Y0
2
3Z
4
INH
6
3S
9
2S
10
3Y1
3
1Y1
13
IC302A
74HCT4053 SM
0V_SIG
1Y0
12
1Z
14
2Z
15
1S
11
2Y1
1
3Y0
5
2Y0
2
3Z
4
INH
6
3S
9
2S
10
3Y1
3
1Y1
13
IC304A
74HCT4053 SM
0V_SIG
-5V
+5V
C312
100N 0805
C313
100N 0805
VDD
16
GND
8
VEE
7
IC304B
74HCT4053 SM
0V_SIG
-5V
+5V
VDD
16
GND
8
VEE
7
IC302B
74HCT4053 SM
0V_SIG
R309
30K 0805
R311
15K 0805
MAINGRR
MAINGRL
MJT
29/01/02
Production release
1.1
R315
0R0 0805
0V_SIG
02_E028
WAF
16/7/02
2 JUMPER LINKS ADDED ACROS SK928 & SK929
1.2
02_E143