Arcam DiVA CD72 Service Manual page 22

1
VDAC
SK1
FFC23V
D
VDIG
RLYPWR
RLY_GND RLYPWR
RLY_GND U36
C
LM317T
O
Vout Vin
+13V
+8V9
P8V9
C2 +
100U EL
GAIN
+ C4
B
100U EL 1N0 PPS SM
N5V
C16
-5V
O
Vout
U35
-13V 7905
VCCD
+
A
1
2
VDDAC
VP18
+5VCLK
+
VN18 Q6
BC849B
+ C56
100U EL
VCCD
VCCD
+13V +
I
Q4
BC859B
+5VCLK
*
+ C165 VN18
10U EL
*
Q30
R141
BC849B
*
100R SM
R133
1K5 SM
*
HDCD 6dB Gain Shift
I
Vin
-13V
DRAWING TITLE
Alpha 9 CD DAC PSU
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\L816C7_5.SCH
2
Q7
2SA1964
Q3
BC859B
Q14
BC849B
R33
100R FU
Q13
BC859B
Q2
BC849B
Q5
2SC5248
* * *
R135
Q19
BC849B
1K0 SM
C135 +
LGAIN
*
100U EL
*
*
99_1072
98_1067
98_1058
Circuit Diagram
98_1022
98_1020
ECO No.
Date Printed
3
+13V
VP13V 3
2
+
U5B
OP27 SM
-5V
HS1B
+
TO220_TV5
VN13V
Heatsink HS1
Shared between
Q5 and Q7.
-13V
REF
R67
1K0 SM
R75 *
1K0 SM
+ C107
100U EL +
WAF C28, C65 VALUE CHANGE
14-10-99
LJW No Change on this sheet
02-Nov-98
SJB No Change on this sheet
21-Sept-98
D1 & D2 not fitted. U35 & U36 added & supporting components
SJB
13-May-98
SJB 1st Issue
21-APR-98
INITIALS DATE DESCRIPTION OF CHANGE
Drawn by:
Sheet
SJB
15-Oct-1999
3
4
VCCA VCCA
6
D
U5A
OP27 SM
C27
10U NP
+ C12
100U EL
C
* Fit to HDCD version only
** Fit to DSP version only
+13V +13V
GO
Q16
BC847B
Q17
B
BC849B
5
4
3
A
2
1
ISSUE
7 of 9 L816CT
DRAWING NO.
4