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DRAWING NO.
23425
DRAWING TITLE
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ECO No. DESCRIPTION OF CHANGE
J:\Change_Control\ECO_WIP\02_E143 L921 add 2 jumper links\L921_1.2.ddb - Documents\L921C4_1.2_tape&vcr.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
L921CT - AV8 audio board input matrix buffer amps
Circuit Diagram
L921C4
AD/subcon
16-Jul-2002
INITIALS
Date Printed
4 9Sheet of
Notes:
3
2
1
IC402A
TL072 SM
0V_SIG
5
6
7
IC402B
TL072 SM
TAPE OUTPUT
TAPE-L
TAPE-R
3
2
1
IC403A
TL072 SM
5
6
7
IC403B
TL072 SM
0V_SIG
Z2V-R
ZONE 2 MIX L
Z2V-L
ZONE 2 MIX R
TAPE L MIX
TAPE R MIX
VCR L MIX
VCR R MIX
0V_SIG
3
2
1
IC401A
OPA2134PA SM
0V_SIG
5
6
7
IC401B
OPA2134PA SM
ZONE 2 DCA IN R
ZONE 2 DCA IN L
TAPE OUT L
TAPE OUT R
0V_SIG
VCR OUTPUT
VCR-L
VCR-R
VCR OUT L
VCR OUT R
-15V
+15V
0V_SIG
84
IC401C
OPA2134PA SM
-15V
+15V
0V_SIG
84
IC403C
TL072 SM
C403
100P NPO 0805
0V_SIG
C406
100P NPO 0805
0V_SIG
C416
100P NPO 0805
C413
100P NPO 0805
C423
100P NPO 0805
C426
100P NPO 0805
R401
1M 0805
R403
1M 0805
R402
110K 0805
R404
110K 0805
R406
100K 0805
R409
100K 0805
R407
100K 0805
R410
100K 0805
R405
47R 0805
R408
47R 0805
R411
47R 0805
R414
47R 0805
R412
100K 0805
R415
100K 0805
R416
100K 0805
R413
100K 0805
C407
100N 0805
C408
1N 0805
C410
100N 0805
C409
1N 0805
C429
100N 0805
C427
100N 0805
C428
1N 0805
C430
1N 0805
C401
33P NPO 0805
C404
33P NPO 0805
C411
33P NPO 0805
C414
33P NPO 0805
C421
33P NPO 0805
C424
33P NPO 0805
-15V
+15V
0V_SIG
C420
1N 0805
C419
100N 0805
C418
1N 0805
C417
100N 0805
84
IC402C
TL072 SM
VCROUTR
VCROUTL
TAPEOUTR
TAPEOUTL
Z2DCAINL
Z2DCAINR
MJT 29/01/02 Production release 1.1
C402
100U NP
C405
100U NP
C412
10U NP
C415
10U NP
C422
10U NP
C425
10U NP
02_E028
WAF 16/7/02 2 JUMPER LINKS ADDED ACROS SK928 & SK929 1.202_E143