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ISSUE
DRAWING NO.
DRAWING TITLE
Drawn by:
DATE
Filename
ECO No. DESCRIPTION OF CHANGE
J:\PROJECTS\A9 CD\L816PB DAC PCB\Circuits & PCB\Issue 5\L816c1 5.DDB - Documents\L816C5 .SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Alpha 9 CD DAC Right Audio Stage
Circuit Diagram
L816CT
SJB
15-Oct-1999
INITIALS
Date Printed
5 9Sheet of
Notes:
3
2
6
1
8 5
U14A
AD797A SM
74
U17B
AD797A SM
5
6
7
U18B
EL2244 SM
3
2
1
U18A
EL2244 SM
84
U18C
EL2244 SM
R72
1K0 SM
L9
10UH SM
R78
15R SM
R83
62R SM
C90
82P SM
R79
10R SM
3
2
6
1
8 5
U17A
AD797A SM
R93
1K0 SM
L10
10UH SM
R88
15R SM
R94
62R SM
C105
82P SM
R89
10R SM
74
U14B
AD797A SM
Cold_R
Hot_R
3
2
1
U15A
OP275 SM
5
6
7
U15B
OP275 SM
84
U15C
OP275 SM
3
2
1
U19A
EL2244 SM
5
6
7
U19B
EL2244 SM
84
U19C
EL2244 SM
R96
3K3 SM
R71
3K3 SM
C106
100P PPS SM
C83
100P PPS SM
-13V
+13V
R62
10K 0805 0.1%
R90
10K 0805 0.1%
C82
56P SM
Out_R
Outn_R
R84
2K7 0805 0.1%
R95
2K7 0805 0.1%
R68
2K7 0805 0.1%
R103
2K7 0805 0.1%
C71
2N2 PPS SM
C72
2N2 PPS SM
C76
270P PPS SM
C102
270P PPS SM
C101
1N0 PPS SM
C94
1N0 PPS SM
C80
4N7 PPS SM
C86
4N7 PPS SM
C74
2N2 PPS SM
C79
2N2 PPS SM
FBCKR
FBCKR
FBCKRSNS
FBCKRSNS
C112
47N PPS SM
C68
47N PPS SM
C113
10N PPS SM
C73
10N PPS SM
MID_R
C95
1N0 PPS SMC100
1N0 PPS SM
C84
4N7 PPS SMC81
4N7 PPS SM
Audio_R
3
2
6
1
85
U24A
AD797A SM
74
U24B
AD797A SM
Q24
BC847B
Q21
BC847B
Q20
BC857B
R107
150R SM
C121
47P SM
R101
470R SM
L13
0R0 SM
VCCA1R(2)
VCCA1R
+8V9 +8V9
C108
10N PPS SM
C118
100N SM
REF
R123
470R SM
74
U25B
AD797A SM
GNDA1R
5
6
7
U23B
OP275 SM
3
2
1
U23A
OP275 SM
3
2
1
U22A
TL072 SM
84
U23C
OP275 SM
R124
10K 0805 0.1%
R125
10K 0805 0.1%
R129
10K 0805 0.1%
R128
22K1 0805 0.1%
R108
10K 0805 0.1%
DCSET_R
DCSET_R
C114
100N PPS SM
C115
100N PPS SM
R115
220K SM
R97
2M2 SM
Out_R
C126
4N7 PPS SMC111
4N7 PPS SM
C117
100N PPS SM
DC Bias
DC Servo
DAC 5V Reference
Ballun & Lowpass Filter
DCR
DCNR
SERVOR
COLDR
HOTR
REFR
C99
100N PPS SM
MIDR
* Fit to HDCD version only
** Fit to DSP version only
REFx2
-REF/2
REF/4
REF/4
REF
-5V
+8V9
3
2
6
1
8 5
U25A
AD797A SM
Q23
BC857B
Q22
BC857B
Q26
BC847B
R119
150R SM
C120
47P SM
R92
470R SM
L12
0R0 SM
C93
10N PPS SM
-5V
DAC 0V Reference
GNDAR
0V
D7 BAS16W SM
R118
470R SM
R60
4K12 0805 0.1%
C103
390P PPS SM
C77
390P PPS SM
R63
4K12 0805 0.1%
Q27
MMBFJ113
R102
10K SM
D10
BAS16W SM
SERVQK
On DSP Version only:
R1=2K0, C70=560P
On DSP Version only:
R13=2K0, C103=560P
1
FBKRSNS
FBKRSNSN
RFRSNS
GRSNS
C87
220P PPS SM#
C70
220P PPS SM#
**
**
GNDA1R(2)
1st Issue
21-APR-98
SJB
98_1020
2No Change on this sheet
13-May-98
SJB
98_1022
R172
2M2 SM
Hot_R
Distortion Cancela ion
C166
390P PPS SM
C168
390P PPS SM
R173
100R SM
R174
100R SM
R175
100R SM
R176
100R SM
C172
390P PPS SM
C173
390P PPS SM
3
C166,168,172,173 & R172, 173,174,175,176 added
21-Sept-98
SJB
98_1058
4
C82 was 2C010A 10pf cer sm
02-Nov-98
LJW
98_1067
C97
10U NP
C98
10U NP
5NO CHANGE ON THIS SHEET
14-10-99
WAF
99_1072
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