Arcam FMJ AV8 Service Manual page 97

1
ANALOGUE L MIX
IC301A
OPA2134PA SM
3
D
2
C301
+5V
33P NPO 0805
IC302B
IC302A
74HCT4053 SM
12
1Y0
8
GND
16 13
VDD 1Y1
2
2Y0
1
2Y1
5
3Y0
C 3
3Y1
11
1S
-5V 10
2S
0V_SIG 9
3S
74HCT4053 SM
0V_SIG
B
GAIN RANGE A
GAIN RANGE B
GAIN RANGE C
+15V
C304
IC301C
C305
100N 0805 1N 0805
A OPA2134PA SM
C307
C306
100N 0805 1N 0805
0V_SIG
-15V
1
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2
TP1
1
R306
4K7 0805
R302
30K 0805
R303
14
1Z
30K 0805
R304
15
2Z
15K 0805
R305
4
3Z
4K3 0805
0V_SIG
6
INH
0V_SIG
DRAWING TITLE
L921CT - AV8 audio board gain range section
23425
A & R Cambridge Ltd.
Notes:
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Filename
J:\Change_Control\ECO_WIP\02_E143 L921 add 2 jumper links\L921_1.2.ddb - Documents\L921C3_1.2_gainrange.sch
2
ANALOGUE R MIX
IC301B
OPA2134PA SM
5
7
+5V
6
C312
100N 0805
C303
IC304B
74HCT4053 SM
33P NPO 0805
8
GND
R307 16
VDD
4K7 0805
AN-L
100N 0805
C313
-5V
0V_SIG
Circuit Diagram
02_E143
02_E028
ECO No.
3
TP3
IC303A
OPA2134PA SM
3
1
2
R313
C308
33P NPO 0805
4K7 0805
R309
30K 0805
IC304A
12
1Y0 R310
14
1Z
13
1Y1 30K 0805
2
2Y0
R311
15
2Z
1
15K 0805
2Y1
5
3Y0
R312
4
3Z
3
3Y1 4K3 0805
11
1S
10 6
2S INH
9
3S
74HCT4053 SM
0V_SIG
+15V
C315
C314
1N 0805
100N 0805
C316
0V_SIG 100N 0805
-15V
WAF 16/7/02 2 JUMPER LINKS ADDED ACROS SK928 & SK929
MJT 29/01/02 Production release
INITIALS DATE DESCRIPTION OF CHANGE
Date Printed Drawn by:
Sheet
AD/SUBCON
16-Jul-2002
3
4
IC303B
OPA2134PA SM
5
7
6
C310
33P NPO 0805
R314
4K7 0805
AN-R
MAINGRR
FROM MAIN GR R
R315
0R0 0805
A-D GROUND REF
MAINGRL
FROM MAIN GR L
IC303C
OPA2134PA SM
C317
1N 0805
1.2
1.1
ISSUE
3 of 9
L921C3
DRAWING NO.
4