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ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No. DESCRIPTION OF CHANGE
L940C4_1.0.SCH
A75 PLUS AMP
Contact Engineer:
L940C4
11-Dec-2001
INITIALS
Printed:
4 7Sheet of
Notes:
Contact Tel: (01223) 203 200Travis Pierce
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB5 9PB
Waterbeach
R203
4K7 MF
R206
4K7 MF
R215
3K3 MF
R217
3K3 MF
RV166B
10K LIN POT
RV165B
10K LIN POT
C205
220N PE
C207
220N PE
R207
4K7 MF
R213
10K MF
RV167B
10K LIN POT
+
C203
10U EL
BASS
TREBLE
8dB cut and boost
Tone controls :
R202
4K7 MF
R204
4K7 MF
R214
3K3 MF
R216
3K3 MF
RV166A
10K LIN POT
RV165A
10K LIN POT
C204
220N PE
C206
220N PE
R205
4K7 MF
R210
10K MF
RV167A
10K LIN POT
+
C202
10U EL
BASS
TREBLE
8dB cut and boost
Tone controls :
Pot arrow shows max boost
Pot arrow shows max boost
+15V
-15V
R201
24K MF
R200
24K MF
3
2
1
Z161A
4560D
5
6
7
Z161B
4560D
C197
10P CD
C196
10P CD
5
6
7
Z160B
4560D
3
2
1
Z160A
4560D
84
Z160C
4560D
84
Z161C
4560D
C208
4N7 PP
PWRRIGHT
PWRLEFT
PREMUTE
C209
4N7 PP
1
2
3
4
5
6
7
8
LK169
L809CA
SEL1
1
S2
14
D1
2
V+
13
S1
3
S3
11
V-
4
GND
5
VL
12
S4
6
D3
10
D4
7
SEL3
9
D2
15
SEL4
8
SEL2
16
Z171
DG413DJ
PREMUTE
SELOPR
SELOPL
-15v
+15v
+5v
-15v
+15v
R230
47R MF
C227
100P PPW
R231
47R MF
C228
100P PPW
SEL1
1
S2
14
D1
2
V+
13
S1
3
S3
11
V-
4
GND
5
VL
12
S4
6
D3
10
D4
7
SEL3
9
D2
15
SEL4
8
SEL2
16
Z164
DG413DJ
84
Z163C
OPA2134PA
3
2
1
Z163A
OPA2134PA
5
6
7
Z163B
OPA2134PA
+5v
+15v
-15v
-15v
+15v
AVCONTROL
AVCONTROL
R234
100K MF
R235
100K MF
R232
100K MF
R233
100K MF
C213
100N CD
C218
100N CD
C219
100N CD
C222
100N CD
C221
100N CD
C220
100N CD
C216
100N CD
C217
100N CD
C223
100N CD
C224
100N CD
LHC
2
RHC
3
1
4
L
5
6
R
7
SK162
HPSKT
4
5
6
SW163B
2PCO
1
2
3
SW163A
2PCO
R161
330R 1W CF
R162
330R 1W CF
R236
100R W2 CF
R237
100R W2 CF
1
2
3
4
5
6
7
LK170
L825CA
1
2
3
4
5
6
7
LK171
L825CA
HPSW1
HPSW2 SP2_SEND_L
SP2_SEND_R
SP2_RETN_R
SP2_RETN_L
OP_L
OP_R
1
2
3
SW162A
2PCO
4
5
6
SW162B
2PCO
0V_SIG
0V_SIG
0V_SIG
0V_SIG
0V_SIG
0V_SIG
0V_SIG
0V_LS_R
0V_SIG
0V_SIG
0V_SIG
0V_SIG
0V_SIG
0V_SIG
C195
10N CD
1
2
3
4
5
6
7
8
LK168
L809CA
VOLUME POT SNAP OFF BOARD
RV164A
6A360M
RV164B
6A360M
+ -
+
RV164C
6A360M
9
7
Case
RV164D
6A360M
0V_SIG
PREMUTE
AVCONTROL
PREMUTE161
D164
1N4148
D165
1N4148
-15v
+15v
D166
1N4148
D167
1N4148
-15v
+15v
PREAMP OUT
0V_SIG
1 2
LK174
10MM LINK
1 2
LK175
10MM LINK
BOT
5
6
TOP
4
N
F
SK101B
PHONO4G
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
PL161
DIL16 VPLG
0V_SIG
TAPOLTAPOR
1 2
LK173
10MM LINK
1 2LK172
10MM LINK
0V_SIG
CUT LINK IF CIM FITTED (8P ONLY)
CUT LINK IF CIM FITTED (8P ONLY)
FIT LINKS FOR 8P
FIT LINK FOR 8P ONLY
USE EXCLUDE NF TO CREATE RUN OUT SHEET FOR A75
Pre-amp Out, Tone & Headphone
1 2
VOLMOTA161
2W CABLE HOLDER
R238
1K2 MF
R239
1K2 MF
R240
1K0 MF
R160
1K0 MF
0V_SIG
0V_SIG
+
C200
47U EL 35V
+
C201
47U EL 35V
R208
100K MF
R209
100K MF
0V_SIG
0V_SIG
1 2
LK176
10MM LINK
1 2
LK177
10MM LINK
PROT_OP_L
PROT_OP_R
R220
11K MF
R221
11K MF
R218
9K1 MF
R219
9K1 MF
Fit on A65 only
Fit on A65 only
FIT LINK FOR 8P ONLY
C210
100P PP
C211
100P PP
+
C215
22U EL
+
C214
22U EL
R211
68K MF
R212
68K MF
USE EXCLUDE A65 TO CREATE RUN OUT SHEET FOR A65
1 2
LK239
10MM LINK
1 2
LK200
10MM LINK
TGP01_E020 12/12/01 PRODUCTION RELEASE 1.0