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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\L816C6 .SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Alpha 9 CD DAC Left Audio Stage
Circuit Diagram
L816CT
SJB
15-Oct-1999
INITIALS
Date Printed
6 9Sheet of
Notes:
3
2
6
1
8 5
U8A
AD797A SM
74
U6B
AD797A SM
3
2
1
U9A
EL2244 SM
5
6
7
U9B
EL2244 SM
84
U9C
EL2244 SM
R54
1K0 SM
L8
10UH SM
R50
15R SM
R55
62R SM
C62
82P SM
R51
10R SM
3
2
6
1
8 5
U6A
AD797A SM
R36
1K0 SM
L5
10UH SM
R42
15R SM
R45
62R SM
C52
82P SM
R43
10R SM
74
U8B
AD797A SM
Cold_L
Hot_L
84
U7C
OP275 SM
84
U10C
EL2244 SM
-13V
+13V
C61
270P PPS SM
C34
270P PPS SM
C55
1N0 PPS SM
C59
1N0 PPS SM
C47
4N7 PPS SM
C40
4N7 PPS SM
C39
2N2 PPS SM
C33
2N2 PPS SM
FBCKL
FBCKL
FBCKLSNS
FBCKLSNS
C31
47N PPS SM
C67
47N PPS SM
C32
10N PPS SM
C69
10N PPS SM
MID_L
C60
1N0 PPS SMC58
1N0 PPS SM
C44
4N7 PPS SMC42
4N7 PPS SM
Audio_L
3
2
6
1
85
U3A
AD797A SM
74
U3B
AD797A SM
Q9
BC847B
Q12
BC847B
Q15
BC857B
R25
150R SM
C14
47P SM
R29
470R SM
L2
0R0 SM
VCCA1L(2)
VCCA1L
+8V9 +8V9
C51
10N PPS SM
C17
100N SM
REF
R18
470R SM
74
U2B
AD797A SM
3
2
1
U4A
OP275 SM
5
6
7
U4B
OP275 SM
5
6
7
U22B
TL072 SM
84
U4C
OP275 SM
R24
470R SM
R5
10K 0805 0.1%
R6
10K 0805 0.1%
R1
10K 0805 0.1%
R2
22K1 0805 0.1%
R27
10K 0805 0.1%
DCSET_L
DCSET_L
C19
100N PPS SM
C24
100N PPS SM
R16
220K SM
R104
2M2 SM
Out_L
C5
4N7 PPS SMC29
4N7 PPS SM
C116
100N PPS SM
DC Bias
DC Servo
DAC 5V Reference
DCL
DCNL
SERVOL
COLDL
HOTL
REFL
C57
100N PPS SM
MIDL
84
U22C
TL072 SM
3
2
1
U7A
OP275 SM
5
6
7
U7B
OP275 SM
3
2
1
U10A
EL2244 SM
5
6
7
U10B
EL2244 SM
R56
3K3 SM
R30
3K3 SM
C64
100P PPS SM
C43
100P PPS SM
R20
10K 0805 0.1%
R52
10K 0805 0.1%
C41
56P SM
R46
2K7 0805 0.1%
R61
2K7 0805 0.1%
R26
2K7 0805 0.1%
R69
2K7 0805 0.1%
C22
2N2 PPS SM
C23
2N2 PPS SM
REFx2
-REF/2
REF/4
REF/4
GNDA1L(2)
GNDA1L
REF
+8V9
-5V
3
2
6
1
8 5
U2A
AD797A SM
Q11
BC857B
Q10
BC857B
Q8
BC847B
R10
150R SM
C13
47P SM
R35
470R SM
L3
0R0 SM
C46
10N PPS SM
-5V
DAC 0V Reference
GNDAL
0V
D6 BAS16W SM
Out_L
Outn_L
Ballun & Lowpass Filter
R19
4K12 0805 0.1%
R21
4K12 0805 0.1%
C63
390P PPS SM
C35
390P PPS SM
Q28
MMBFJ113
D8
BAS16W SM
SERVQK
R109 10K SM
On DSP Version only:
R14=2K0, C104=560P
On DSP Version only:
R27=2K0, C105=560P
1
FBKLSNS
FBKLSNSN
RFLSNS
GLSNS
C48
220P PPS SM#
C20
220P PPS SM#
* Fit to HDCD version only
** Fit to DSP version only
**
**
1st Issue
21-APR-98
SJB
98_1020
2No Change on this sheet
13-May-98
SJB
98_1022
C167
390P PPS SM
C169
390P PPS SM
R171
2M2 SM
Hot_L
Distortion Cancelation
R177
100R SM
R178
100R SM
R179
100R SM
R180
100R SM
C174
390P PPS SM
C175
390P PPS SM
3
C167,169,174,175 & R171,177,178,179,180 added
21-Sept-98
SJB
98_1058
4
C41 was 2C010A 10pf cer sm
02-Nov-98
LJW
98_1067
C30
10U NP
C38
10U NP
5NO CHANGE ON THIS SHEET
14-10-99
WAF
99_1072
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