Arcam DiVA CD72 Service Manual page 20

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