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ECO No. DESCRIPTION OF CHANGE
J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C3_1.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Integrated amplifier preamp - power supply
Circuit Diagram
L937C3
JBR
28-Nov-2001
INITIALS
Date Printed
3 3Sheet of
Notes:
1
2
3
4
SK300
MOLEXPWR4
+
C300
1000u 35V
+
C310
1000u 35V
D302
BAS16W SM
D308
BAS16W SM
Vin
I
ADJ
A
Vout
O
Z301
LM317T
D305
BAS16W SM
D304
BAS16W SM
R303
470R SM
+
C305
10U EL
C304
100N SM
R302
1K2 SM
R307
220R SM
+15V
-15V
+5V
0V_PSU
SP300
STAR POINT 4
0V_PSU
0V_SIG
0V_HF 0V_MODULE
+
C306
470U EL 25V
C307
470N PE
C308
100N SM
C309
100N SM
Q301
2SC5248
Q305
2SA1964
+
C302
220U EL
+
C312
220U EL
Q300
J112
Q303
J112
R300
330R SM
R304
330R SM
+
C303
3300u 25V
+
C313
3300u 25V
D310
15V 350MW SM
D311
15V 350MW SM
Q306
BC846B
Q307
BC856B
1
2
3
4
SK301
IDC4S
+15V
-15V
0V_PSU
0V_MODULE
AC1
AC2
UR+
UR-
D311-
D310+
+15V3
+5V
+3.75V
0V_SIG
-15V3
C314
1N0 PP
C315
1N0 PP
D300
S1D
D301
S1D
D306
S1D
D307
S1D
01_1142 JBR 14/8/01 First production release 1.0
01_E014 JBR 28/11/01 Fuses uprated to 2A 1.1
F300
T2A SM
F301
T2A SM