1
2
3
4
5
6
7
8
A
B
C
D
8
7
6
5
4
3
2
1
D
C
B
A
ISSUE
DRAWING NO.
23425
DRAWING TITLE
Drawn by:
DATE
Filename
ECO No.
DESCRIPTION OF CHANGE
J:\FILES\Products\A1_7_8_8P AMPS\Issue_2\L846C2_3.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
ALPHA 1,7, 8 & 8P AMP
Circuit Diagram
L846C2_2
LJW
22-Sep-1998
INITIALS
Date Printed
2
7
Sheet
of
Notes:
L
N
E
N
E
L
SK201
IEC3
C201
4N7 MAINS
FS201
AS1A25
+
C204
10M EL 50V
+
C205
10M EL 50V
C206
100N PC
C207
100N PC
PSUP
POWRE
NSUP
R204
470R FU
R205
470R FU
R206
470R FU
R201
470R FU
R202
470R FU
R203
470R FU
C208
4N7 PP
C209
4N7 PP
+
C210
10U EL
+
C211
10U EL
P15V
N15V
Vin
I
GND
G
Vout
O
Z201
7815
Vin
I
GND
G
Vout
O
Z202
7915
P15V
N15V
+37V
-37V
SW201B
A1007
SW201A
A1007
SELECT VOLTAGE
BY FITTING FS201
OR FS202
MAINS INPUT
MAINS SWITCH
FIT ONLY ONE FUSE
W12
Chassis Earth Point,
W10
Use correct screw and washer.
R207
100R MF
MAINS_N
MAINS_E
MAINS_L
MAINS SW SPACER
MS
MAINS_SW_SPACER
LK1001
LINK10NP
LK1002
LINK10NP
LK1003
LINK10NP
LK1004
LINK10NP
LK1005
LINK10NP
LK1006
LINK10NP
LK1007
LINK10NP
LK1008
LINK10NP
LK1009
LINK10NP
LK1010
LINK10NP
LK1011
LINK10NP
LK1012
LINK10NP
LK1013
LINK10NP
LK1014
LINK10NP
LK1015
LINK10NP
LK1016
LINK10NP
LK1017
LINK10NP
LK1018
LINK10NP
LK1019
LINK10NP
LK1020
LINK10NP
LK1021
LINK10NP
LK1023
LINK10NP
LK1024
LINK10NP
LK1025
LINK10NP
LK1026
LINK10NP
LK1027
LINK10NP
LK1028
LINK10NP
LK1029
LINK10NP
LK1030
LINK10NP
LK1031
LINK10NP
LK1032
LINK10NP
LK1033
LINK10NP
LK1034
LINK10NP
LK1035
LINK10NP
LK1036
LINK10NP
LK1037
LINK10NP
LK1038
LINK10NP
LK1039
LINK10NP
LK1063
LINK10NP
LK1064
LINK10NP
LK1065
LINK10NP
LK1066
LINK10NP
LK1067
LINK10NP
LK1068
LINK10NP
LK1069
LINK10NP
LK1070
LINK10NP
LK1071
LINK10NP
LK1072
LINK10NP
LK1073
LINK10NP
LK1074
LINK10NP
LK1075
LINK10NP
LK1077
LINK10NP
LK1078
LINK10NP
LK1079
LINK10NP
LK1080
LINK10NP
LK1082
LINK10NP
LK1083
LINK10NP
LK1084
LINK10NP
LK1085
LINK10NP
LK1086
LINK10NP
LK1087
LINK10NP
LK1088
LINK10NP
LK1089
LINK10NP
LK1090
LINK10NP
LK1091
LINK10NP
LK1092
LINK10NP
LK1093
LINK10NP
LK1094
LINK10NP
LK1095
LINK10NP
LK1096
LINK10NP
LK1097
LINK10NP
LK1098
LINK10NP
LK1041
LINK10NP
LK1042
LINK10NP
LK1043
LINK10NP
LK1044
LINK10NP
LK1045
LINK10NP
LK1046
LINK10NP
LK1047
LINK10NP
LK1048
LINK10NP
LK1049
LINK10NP
LK1050
LINK10NP
LK1051
LINK10NP
LK1052
LINK10NP
LK1053
LINK10NP
LK1054
LINK10NP
LK1055
LINK10NP
LK1056
LINK10NP
LK1057
LINK10NP
LK1058
LINK10NP
LK1059
LINK10NP
LK1060
LINK10NP
WARNING SAFETY CRITICAL COMPONENT
REPLACE WITH IDENTICAL PART
T1
T2
T3
LK1099
LINK10NP
LK1100
LINK10NP
LK1101
LINK10NP
LK1102
LINK10NP
LK1103
LINK10NP
LK1104
LINK10NP
LK1105
LINK10NP
LK1106
LINK10NP
LK1107
LINK10NP
LK1108
LINK10NP
LK1109
LINK10NP
LK1110
LINK10NP
LK1111
LINK10NP
LK1112
LINK10NP
LK1113
LINK10NP
LK1114
LINK10NP
LK1115
LINK10NP
LK1116
LINK10NP
LK1117
LINK10NP
LK1118
LINK10NP
LK1119
LINK10NP
LK1120
LINK10NP
LK1121
LINK10NP
LK1122
LINK10NP
LK1125
LINK10NP
LK1127
LINK10NP
LK1128
LINK10NP
LK1129
LINK10NP
LK1130
LINK10NP
LK1131
LINK10NP
LK1132
LINK10NP
LK1133
LINK10NP
LK1134
LINK10NP
LK1135
LINK10NP
LK1136
LINK10NP
LK1137
LINK10NP
LK1138
LINK10NP
PD1
TOOLING
PD2
TOOLING
PD3
TOOLING
PD4
TOOLING
PD5
TOOLING
Y1
TX WIRE CLIP
PD8
TARGET1
PD9
TARGET1
Y2
TX WIRE CLIP
PD10
TOOLING
PD11
TOOLING
LK1062
LINK10NP
Test point for service engineers are shown as
See additional service documentation for details.
FS202
AS2A5_115V
230V
115V
9Vac
SCREEN
TX1
L833TX
TP1
TP2
TP3
TP4
TP5
TP6
TP28
C200
1N0 CD
D201
UF5403
D202
UF5403
D203
UF5403
D204
UF5403
Blue
1
Dark Grey
2
Orange
3
SK4
CAGECLAMP3
Green
1
SK5
CAGECLAMP1
Grey
1
Grey
2
SK6
CAGECLAMP2
Orange
1
Blue
2
Orange
3
SK7
CAGECLAMP3A
WAF
WAF
WAF
GREY1
GREY2
GREEN
OR1
OR2
BLUE1
BLUE2
LK1081
LINK10NP
LK1076
LINK10NP
LJW
LJW
12-05-98
98_1025
Photo Strip
PS
PHOTO_STRIP
1
Issue Box
Drilling Detail
DD3
DD_ISSUE
Update Box_2
EL2
UPDATE_BOX_2
BARCODE LABEL
BARCD
BARCODE
Spare Fuse Clip
EL1
FUSE CLIP
LK12
LINK10NP
LK13
LINK10NP
LK14
LINK10NP
PD7
TOOLING
PD12
TOOLING
PD13
TOOLING
PD14
TOOLING
POWER SUPPLY
Paper Marker
A1 Horizontal
DD1
DD_A1H
Paper Marker
A1 Vertical
DD2
DD_A1V
Detail
Drilling
DD
DRILL_DWG
C15
4N7 MAINS
C23
4N7 MAINS
PCB
PCB
L846PB
CEM1, 2 OZ Cu
PCB MATERIAL
DD4
CEM1_20Z
ACSENSE
Initial release
2
LISTENING APPROVAL
29-05-98
98_1029
ACLT1