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\L846C6_3.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
ALPHA 1, 7, 8 & 8P AMP
Circuit Diagram
L846C6_2
LJW
22-Sep-1998
INITIALS
Date Printed
6
7
Sheet
of
Notes:
R131
1K0 CF
R140
33K MF
R124
2K7 MF
R119
5K6 CF
R123
2K7 MF
Q116
BC557B
Q107
BC556B
Q106
BC556B
Q103
BC556B
+
C109
100U EL
R132
33K MF
5
6
7
Z301B
NE5532
R133
680K MF
C106
47N PE
R138
680K MF
R137
47K MF
SRVOR
Q113
BC547B
Q112
BC547B
Q104
BC546B
Q108
BC546B
Q119
BC546B
Q110
BC547B
Q111
BC547B
Q105
BC556B
R130
33K MF
C108
100P PP
R125
330R MF
C107
4N7 PP
C105
33P PS
R120
15K MF
R122
120R MF
R128
18K MF
R129
1K2 MF
C104
47N PE
R117
5K6 MF
R116
2K7 MF
R108
470R FU
R112
470R FU
R109
470R FU
C114
15N PE
+
C111
100U EL 100V
R126
470R FU
R105
100R FU
D103
10V 400MW
D104
10V 400MW
R106
100R FU
R110
470R FU
R111
470R FU
R114
1K0 MF
R113
1K0 MF
AMPER
R115
1K0 CF
R127
470R FU
-37V
R107
470R FU
R101
0R22 3W MO
R101A
0R22 3W MO
Q101
IRF540
D101
1N4003F
+37V
R104
100R FU
+
C101
100U EL 100V
C102
47N PE
D102
10V 400MW
R103
2R2 CF
C117
470P CD
R102
4R7 W2 CF
C103
100N PC
Q102
IRF540
C113
15N PE
+
C112
100U EL 100V
R118
2K7 MF
Q115
BC546B
R152
3K9 MF
RLY1B
RLY G5Z-2A-E
RLY1C
RLY G5Z-2A-E
C120
470P CD
C118
1N0 CD
R141
470R FU
R142
620R MF
+
C116
100U EL
R145
18K MF
R135
33K MF
R147
4K7 MF
Q114
BC557B
R121
100R MF
PWR
1
IN1
2
IN2
3
0V
4
V-
5
O
6
FB
7
RC
8
V+
9
Z303
TA7317P
+
C123
100U EL
R165
47K MF
R154
47K MF
R153
47K MF
R155
47K MF
+
C119
1U0 EL
R157
100K MF
D105
1N4003F
R158
47K MF
Q120
2SC2547
R161
1K0 1W CF
D106
1N4003F
R160
10K MF
R159
100K MF
+
C122
100U EL
+37V
R164
18K MF
-37V
+
C121
1U0 EL
R163
33K MF
R162
47K MF
1
2
LK4
10MM LINK
D107
1N4003F
R167
2K7 1W CF
+37V
R166
2K7 1W CF
R
G
LED201
LED RED/GRN
D108
5V6 400MW
Q117
BC546B
Top+
Top-
SK2A
CAMCON_G
Bot+
Bot-
SK2B
CAMCON_G
CHASS
SK2C
CAMCON_G
L101
2U2H LAC SMALL
PWRIR
IQ1R
IQ2R
SPRD
SPRE
SPRS
ACDET
PROTE
PROT
PROTIN
Q118
BC546B
1
2
3
LK805A
L815CA
1
2
3
LK805
L815CA
R146
150R MF
TP22
TP23
TP24
TP25
TP26
TP27
PD6
CHASSIS
EARTH
1
2
LK3
10MM LINK
1
2
LK2
10MM LINK
FIT ALL
BUT HK
1
2
LK5
10MM LINK
1
2
LK6
10MM LINK
LK5 & LK6 FIT
FOR HK ONLY
R156
470R FU
+
C110
22U EL OS
98_1025
1
Initial release
12-05-98
LJW
D7
1N4148
D9
1N4003F
C126
100N PC
C128
100N PC
R134
1K MF
+
C127
220U EL
C125
100N PC
R139
18K MF
C124
4N7 PP
1
2
LK118
10MM LINK
RV101
10K PSET
RIGHT CHANNEL
R170
680R MF
+
C130
10U CERAFINE
R151
15K MF
R136
100R FU
PWRIR
VI_CH2
SP2_RETN_R
ACSENSE
2
LJW
VI_PROTECT
PROT_OP_L
OP_R
SP2_SEND_R
SP2_RETN_L
PREMUTE
LISTENING APPROVAL
29-05-98
98_1029
SK3_7
MUTE
SW99_2
SW99_3
