L921ct - av8 audio board control logic circuit – Arcam Preamp Processor AV8 User Manual
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DRAWING TITLE
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DESCRIPTION OF CHANGE
J:\Change_Control\ECO_WIP\02_E143 L921 add 2 jumper links\L921_1.2.ddb - Documents\L921C7_1.2_ctrlogic.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
L921CT - AV8 audio board control logic circuit
Circuit Diagram
L921C7
AD/subcon
16-Jul-2002
INITIALS
Date Printed
7
9
Sheet
of
Notes:
0V_SIG
SDI
14
SDO
9
OPCK
12
SCLR
10
QA
15
QB
1
QC
2
QD
3
QE
4
QF
5
QG
6
QH
7
VCC
16
GND
8
SCK
11
OE
13
IC703
74HCT595D
AUX TO ANALOGUE
CD TO ANALOGUE
TUNER TO ANALOGUE
DVD TO ANALOGUE
AV TO ANALOGUE
TAPE TO ANALOGUE
VCR TO ANALOGUE
SAT TO ANALOGUE
+5V
0V_SIG
SDI
14
SDO
9
OPCK
12
SCLR
10
QA
15
QB
1
QC
2
QD
3
QE
4
QF
5
QG
6
QH
7
VCC
16
GND
8
SCK
11
OE
13
IC704
74HCT595D
AUX TO ZONE 2
CD TO ZONE 2
TUNER TO ZONE 2
DVD TO ZONE 2
AV TO ZONE 2
TAPE TO ZONE 2
VCR TO ZONE 2
SAT TO ZONE 2
+5V
0V_SIG
SDI
14
SDO
9
OPCK
12
SCLR
10
QA
15
QB
1
QC
2
QD
3
QE
4
QF
5
QG
6
QH
7
VCC
16
GND
8
SCK
11
OE
13
IC705
74HCT595D
AUX TO VCR
CD TO VCR
TUNER TO VCR
DVD TO VCR
AV TO VCR
TAPE TO VCR
VCR TO VCR
SAT TO VCR
+5V
0V_SIG
SDI
14
SDO
9
OPCK
12
SCLR
10
QA
15
QB
1
QC
2
QD
3
QE
4
QF
5
QG
6
QH
7
VCC
16
GND
8
SCK
11
OE
13
IC706
74HCT595D
AUX TO TAPE
CD TO TAPE
TUNER TO TAPE
DVD TO TAPE
AV TO TAPE
TAPE TO TAPE
VCR TO TAPE
SAT TO TAPE
+5V
SDI
14
SDO
9
OPCK
12
SCLR
10
QA
15
QB
1
QC
2
QD
3
QE
4
QF
5
QG
6
QH
7
VCC
16
GND
8
SCK
11
OE
13
IC707
74HCT595D
INT MAIN TO ZONE 2
EXT MAIN TO ZONE 2
INT DECODER
EXT DECODER
ANALOGUE TO MAIN
GAIN RANGE A
GAIN RANGE B
GAIN RANGE C
+5V
0V_SIG
SDI
14
SDO
9
OPCK
12
SCLR
10
QA
15
QB
1
QC
2
QD
3
QE
4
QF
5
QG
6
QH
7
VCC
16
GND
8
SCK
11
OE
13
IC708
74HCT595D
MAIN TO PHONES
ZONE 2 TO PHONES
ZONE 2 OUTS ENABLE
MAIN OUTS ENABLE
SPARE 1
SPARE 2
SPARE 3
SPARE 4
+5V
Q702
BC856B
Q703
BC856B
Q701
BC856B
MAIN DCA /CS
ZONE 2 DCA /CS
SURROUND DCA /CS
CENTRE/SUB DCA /CS
EX DCA /CS
DCA SDATA
DCA SCLK
DCA XMUTE
0V_SIG
+5V
0V_SIG
0V_SIG
0V_SIG
+5V
SDATA
SCLK
CTRL D0
CTRL D1
CTRL D2
CTRL EN
MAIN DCA
ZONE 2 DCA
SURROUND DCA
CENTRE/SUB DCA
EX DCA
IP MUX
IP MUX
GAIN RANGE
INT/EXT
MUTES
D701
BAS16W SM
CNCT1
CNCT2
CNCT3
CNCT4
CNCT5
CNCT6
CNCT7
CNCT8
SPARE LOGIC
CONNECTIONS
R701
100K 0805
R702
100K 0805
R703
1M 0805
R704
1K0 0805
R709
10K 0805
R711
10K 0805
R713
10K 0805
R710
4K7 0805
R712
4K7 0805
R714
4K7 0805
R708
100K 0805
R707
100K 0805
R706
100K 0805
R705
100K 0805
R715
100R 0805
R716
100R 0805
C703
100N 0805
C704
100N 0805
C705
100N 0805
C706
100N 0805
C707
100N 0805
C708
100N 0805
C701
470N PE
C702
100N 0805
C709
100N 0805
R720
10K 0805
R721
10K 0805
R722
10K 0805
R723
10K 0805
R724
10K 0805
R725
10K 0805
0V_SIG
R719
100R 0805
R718
100R 0805
R717
100R 0805
R728
100R 0805
R726
100R 0805
R727
100R 0805
1
2
IC701A
74HC14D
3
4
IC701B
74HC14D
5
6
IC701C
74HC14D
8
9
IC701D
74HC14D
10
11
IC701E
74HC14D
12
13
IC701F
74HC14D
14
7
IC701G
74HC14D
MJT
29/01/02
Production release
1.1
+5V
+
C710
1U0 EL
R729
1M 0805
0V_SIG
D702
BAS16W SM
A
1
B
2
C
3
G1
6
G2A
4
G2B
5
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
VCC
16
GND
8
IC702
74HC138D
02_E028
WAF
16/7/02
2 JUMPER LINKS ADDED ACROS SK928 & SK929
1.2
02_E143