Arcam DiVA CD72 - Page 22

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A
B
C
D
4321
D
C
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A
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\L816C7_5.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Alpha 9 CD DAC PSU
Circuit Diagram
L816CT
SJB
15-Oct-1999
INITIALS
Date Printed
7 9Sheet of
Notes:
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23
SK1
FFC23V
+
C37
470U EL 25V
+
C36
470U EL 25V
C75 10N SM C158 10N SM
VCCD
VCCD
+13V
VCCA
-13V
RLYPWR
RLY_GND
C11 4N7 PPS SM
C1
4N7 PPS SM
C53 4N7 PPS SM
VP18V
VN18V
VDIG
VCCD
RLYPWRRLY_GND
VDAC
VDDAC
VP13V
VN13V
VCCA
R40
10R SM
VN18
VN18
VP18
VRGND
U12 ZRB500F01
R59 1K5 SM
R67
1K0 SM
+13V
R65 1K5 SM
R58 4K7 SM
Q16
BC847B
GO
REF
D5
BAV99W DUAL SM
D4
BAV99W DUAL SM
3
2
6
1
85
U5A
OP27 SM
74
U5B
OP27 SM
C15 100N SM
R34
1K5 SM
+13V
+8V9
-5V
-13V
P8V9
N5V
PSU for DAC references
Q17
BC849B
R66
10K SM
+13V
-5V
Q19
BC849B
R75
1K0 SM
R135
1K0 SM
R134 1K0 SM
Q30
BC849B
R136
1K5 SM
R133
1K5 SM
GAIN
HDCD 6dB Gain Shift
1
R141
100R SM
R146 1K0 SM
+5VCLK
Q7
2SA1964
R22
4K7 SM
R39
11K SM
R38 1K5 SM
R44 6K8 SM1%
Q6
BC849B
Q14
BC849B
Q4
BC859B
Q13
BC859B
Q5
2SC5248
R17
4K7 SM
R37
10K SM
R32 10K SM
+5VCLK
R155 1K0 SM
Q2
BC849B
R7
100R SM
R11
100R SM
Q3
BC859B
* Fit to HDCD version only
** Fit to DSP version only
*
*
*
*
*
*
*
*
*
*
*
LGAIN
C25
470P PPS SM
C26
470P PPS SM
+
C6
100U SILMIC
+
C7
100U SILMIC
C9
270P PPS SM
C10
270P PPS SM
HS1B
TO220_TV5
Heatsink HS1
Shared between
Q5 and Q7.
1st Issue
21-APR-98
SJB98_1020
2
Vin
I
GND
G
Vout
O
U35
7905
C16
1N0 PPS SM
C18
1N0 PPS SM
Vin
I
ADJ
A
Vout
O
U36
LM317T
C122
1N0 PPS SM
C123
1N0 PPS SM
R168
220R SM1%
R169
2K7 SM1%
R170 2K7 SM1%
D2
8V2 1W SM
+13V
-13V
D1
3V9 0W5 SM
Not Fitted
Not Fitted
D1 & D2 not fitted. U35 & U36 added & supporting components
13-May-98
SJB98_1022
Not Fitted
Not Fitted
3No Change on this sheet
21-Sept-98
SJB98_1058
4No Change on this sheet
02-Nov-98
LJW98_1067
R31
100R FU
R33
100R FU
+
C165
10U EL
+
C2
100U EL
+
C4
100U EL
+
C12
100U EL
+
C21
100U EL
+
C28
22U SILMIC
+
C56
100U EL
+
C107
100U EL
+
C135
100U EL
C27
10U NP
L4
33UH 2A RA
C65
10N PPS SM
5C28, C65 VALUE CHANGE
14-10-99
WAF99_1072