Arcam Alpha 9 - Alpha 9 Tone Control Circuit Diagram

1 2 3 4 5 6 7 8
A
B
C
D
87654321
D
C
B
A
ISSUE
DRAWING NO.
23425
DRAWING TITLE
DRAWN BY CHK BY
DATE
Filename
ECO No.
DESCRIPTION OF CHANGE
J:\Products\A9_amp\pcb_iss7\iss_8\L827C3_8.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
3 5Sheet of
ALPHA 9 TONE CONTROL
Circuit Diagram
L827C3 820-Oct-1998
C13N
220P PP
C14N
220P PP
+
C21N
10U EL
R47N
4K7 MF
C18N
100P PP
R46N
100K MF
R43N
470R MF
-15V
+15V
R54N
1K8 MF
R154N
1K8 MF
RV201NA
20K LIN POT
R36N
5K6 MF
1
2
3
SW205NA
2PCO
DIRECT
BALANCE
FROM
VOLUME
R40N
6K8 MF
R41N
10K MF
R42N
12K MF
RV203NA
20K LIN POT
RV202NA
20K LIN POT
R39N
12K MF
R38N
6K8 MF
+
C15N
10U EL
R37N
6K8 MF
TONEL
ATE_PAD
BASS
TREBLE
3
2
1
Z203NA
TL072
84
Z203NC
TL072
C19N
100P PP
R57N
100K MF
R49N
1K8 MF
R50N
6K8 MF
R51N
100R MF
R48N
4K7 MF
PREOL
ATE_PAD
PREOE
ATE_PAD
PREOR
ATE_PAD
1 2
LK1P
10MM LINK
RLY503NA
RLY 51SB12T
RLY503NB
RLY 51SB12T
EMC
1
N
F
SK305A
PHONO4G
N
F
SK305B
PHONO4G
C113N
220P PP
C114N
220P PP
+
C121N
10U EL
R147N
4K7 MF
C118N
100P PP
R146N
100K MF
R143N
470R MF
-15V
+15V
RV201NB
20K LIN POT
R136N
5K6 MF
4
5
6
SW205NB
2PCO
DIRECT
BALANCE
R140N
6K8 MF
R141N
10K MF
R142N
12K MF
RV203NB
20K LIN POT
RV202NB
20K LIN POT
R139N
12K MF
R138N
6K8 MF
+
C115N
10U EL
R137N
6K8 MF
TONER
ATE_PAD
BASS
TREBLE
5
6
7
Z203NB
TL072
C119N
100P PP
R157N
100K MF
R149N
1K8 MF
R150N
6K8 MF
R151N
100R MF
R148N
4K7 MF
1 2
LK2P
10MM LINK
PRE-OUT
POWER
IN
POWIL
ATE_PAD
POWIR
ATE_PAD
R52
6K8 MF
R152
6K8 MF
R153
2K2 MF
R53
2K2 MF
R61
33K MF
R161
33K MF
1 2
LK3P
10MM LINK
1 2
LK4P
10MM LINK
1 2 3
SW206NA
A1401
4 5 6
SW206NB
A1401
7
8
9
10
SW206NC
A1401
INT/EXT Power Amp Source
+15v
-15v
ALL COMPONENT DESIGNATORS ENDING IN 'N' ARE NOT ON ALPHA 9P
ALL COMPONENT DESIGNATORS ENDING IN 'P' ARE ONLY ON ALPHA 9P
VOLL
VOLR
PWRL
PWRR
C17N
100N PC
C117N
100N PC
C16N
100N PC
C116N
100N PC
C25N
2N2 PP
C125N
2N2 PP
R55N
1K0 MF
R155N
1K0 MF
R62N
820R MF
R162N
820R MF
+
C26N
10U EL
+
C126N
10U EL
3
2
1
Z2NA
JRC4560
5
6
7
Z2NB
JRC4560
84
Z2NC
JRC4560
3
2
1
Z102NA
JRC4560
5
6
7
Z102NB
JRC4560
84
Z102NC
JRC4560
L827301 1MAY 96
WAF
ORIGINAL ISSUE
98_1038