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\L846C7_3.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
ALPHA 1, 7, 8 & 8P AMP
Circuit Diagram
L846C7_2
LJW
22-Sep-1998
INITIALS
Date Printed
7
7
Sheet
of
Notes:
RA2
1
RA3
2
RTCC
3
MCLR
4
VSS
5
RB0
6
RB1
7
RB2
8
RB3
9
RB4
10
RB5
11
RB6
12
RB7
13
VDD
14
OSC2
15
OSC1
16
RA0
17
RA1
18
Z901
PIC16C54XT
3
2
1
+5V
O/P
GND
Case
RX1
SBX1610-52
D904
5V6 400MW
C904
10N CD
R904
1K8 MF
C903
10N CD
R903
100R MF
R902
100R MF
+
C902
220U EL
C901
10N CD
R901
1R0 FU
D902
5V6 400MW
D901
1N4003F
D903
1N4003F
+
C907
1M0 25V
C906
10N CD
C905
10N CD
MOTE
REMO
MOTSUP
VOLM1
VOLM2
P5V
+5V
+5v
X901
CST4.19MG
VOLUME DRIVE
MOTOR DRIVER
D905
1N4148
R905
4K7 MF
W11
W13
+5V
GND
1
MD1
2
CC1
3
REF
4
MC1
5
MC2
6
VCC1
7
VCC2
8
CC2
9
MD2
10
Z902
BA6109
C1000
10N CD
1
2
VOLMOT
1Y271
1
2
VOLMOTA
1Y271
1
2
3
4
5
6
7
8
LK901
L809CA
WARNING SAFETY CRITICAL COMPONENT
REPLACE WITH IDENTICAL PART
1
2
3
LK902A
L815CA
1
2
3
LK902
L815CA
TP29
TP30
TP31
TP32
-
1
12-05-98
-
LJW
R58
1K8 MF
+5V
1
2
LK17
10MM LINK
REMOTE CONTROL
VOLUME POT SNAP OFF BOARD
REMOTE SENSOR SNAP OFF BOARD
RV901A
6A360M
RV901B
6A360M
+
-
+
RV901C
6A360M
9
7
Case
RV901D
6A360M
ACLT1
MUTE
98_1026
Initial release
LJW
2
98_1029
29-05-98
LISTENING APPROVAL
MCLR