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LEFT CHANNEL
L940C5_1.0.SCH
PROTECTION


SP2_SEND_L

SP2_RETN_L
A1
A1

PWRLEFT OP_L




PHONO & INPUTS
L940C3_1.0.SCH TONE CONTROL
L940C4_1.0.SCH
SELOPL SELOPL
SELOPR SELOPR PWRLEFT




PROT SENSE
ACSENSE HPSW2 HPSW2 PWRRIGHT
TAPECONTROL TAPOL
PROT_OP_L TAPOL TAPOR
PROT_OP_R TAPOR SP2_SEND_L


MUX3

MUX2

MUX1
PROTECTION MUTE SP2_RETN_L




PROT_OP_R

PROT_OP_L
HPSW1 HPSW1 OP_L
RIGHT CHANNEL
OP_R
L940C6_1.0.SCH
SP2_SEND_R
SP2_RETN_R PWRRIGHT
PREMUTE
AVCONTROL A1
SP2_SEND_R A1

SP2_RETN_R

REMOTE CONTROL
L940C7_1.0.SCH
OP_R
AVCONTROL
MUTE




PREMUTE
TAPECONTROL
ACLT1

MUX1
MUX2
MUX3

PROT SENSE


POWER SUPPLY
L940C2_1.0.SCH
ACLT1



ACSENSE




USE EXCLUDE NF TO CREATE RUN OUT SHEET FOR A75
USE EXCLUDE A65 TO CREATE RUN OUT SHEET FOR A65
DRAWING TITLE
A75 PLUS AMP
Filename: L940C1_1.0.prj

Notes:

A & R Cambridge Ltd.
Pembroke Avenue
TOP SHEET FOR A75 L940AY 01_E020 TGP 12/12/01 PRODUCTION RELEASE 1.0
ECO No. INITIALS DATE DESCRIPTION OF CHANGE ISSUE
Waterbeach
Cambridge CB5 9PB Contact Engineer: Travis Pierce Contact Tel: (01223) 203 200 Printed: 11-Dec-2001 Sheet 1 of 7 DRAWING NO. L940C1
+38V_L +37V

+
C600 C614 + C606
100U EL 100V C613
R601 R602 R615 100N PE 100V
100N PE 100V 100U 50V YXF LOW Z
100R MF 100R MF 47R MF
0V_HF
D601
0V_HF ZENER 400MW 27V
0V_HF


Q601
Q600 BC556B Q602
BC556B BC556B C609
R621 22N CD
680R MF




Q605 SPLS600
BC556B


SP2_RETN_L Bot+
R629
PROTECTION
47K MF SK600B
D603 R622
C620
1N4003F 10K MF
470P CD SPKSKT_G
Q604 Q603
2SA970GR 2SA970GR Bot-
C608 R625 A1
C604 100P PPW 6K8 MF
R634 D605
100P PPW
1N4148 SK600C
470K MF 0V_LS_L
Q614
CHASS
SAP15N
Bias-L + R627 Q612
SPKSKT_G
430R MF 2SC2240GR
C623 SPLD600
R605
100N PE 100V C610 R620 SET BIAS TO 12mV 100R MF
100N PE 100V 10K MF R606 SP2_SEND_L
100R MF
+ C617
OP_L
Q618 10U EL
C602 Q619 L600
R600 BC546B R611 RLY1A
BC546B
+




PWRLEFT Top+
1K0 MF 100K MF 2U2H LAC SMALL RLY G5Z-2A-E
22U SILMIC 2
R630 C621 SK600A
C603 R612 + C618
4R7 W2 CF R631 470P CD
100P PPW 100K MF Q606 Q607
10U EL SPLE600 SPKSKT_G
BC546B BC546B C625 + C611
R632 R607 2R2 CF
R633 10U EL 100N PE 100V 100R MF Top-
12K MF C619
12K MF R616 RV600 100N PE 100V
2K7 MF 220R PSET R608
0V_SIG 0V_LS_L
100R MF
0V_LS_L

C605 C624
+ +
R613 R614 100U SILMIC 2 100U 25V ZA EL
47R MF 47R MF
Bias-L - R628 C622
Q616
0V_SIG PD6
430R MF 2SA970GR
Q615
A1 1N0 CD
SAP15P


R623
10K MF
R626
6K8 MF
R618
10K MF
0V_HF R624
10K MF D606
R619 D604 1N4148
Q608 10K MF C607 100P PPW 1N4003F
BC546B
Q611 Q610
2SC2240GR 2SC2240GR Q613 Q617
BC546B ZTX653
Q609
BC546B

+ C616 D602
10U EL R603 R604 ZENER 400MW 27V
100R MF 100R MF R609 R610
R617 100R MF 100R MF
680R MF
D600
+ C601 4V7 400MW
0V_HF 100U EL 100V

C612
-38V_L C615 -37V
100N PE 100V +
100N PE 100V
C626
100U 50V YXF LOW Z
0V_HF 0V_HF


CL600 CL601 SP600 SP601
21mm x 32mm 21mm x 32mm
SELF ADHESIVE SELF ADHESIVE
Q2 PAD Q2 PAD
E852MC E852MC
Q2-PAD-SAP Q2-PAD-SAP
E856MC E856MC

HS600 HS601 HS602 HS603

USE EXCLUDE NF TO CREATE RUN OUT SHEET FOR A75
USE EXCLUDE A65 TO CREATE RUN OUT SHEET FOR A65
E81801-75 E81801-75 E81801-75 E81801-75 DRAWING TITLE
A75 PLUS AMP
Filename: L940C5_1.0.SCH

Notes:

A & R Cambridge Ltd.
Pembroke Avenue
Left Channel Power Amplifier 01_E020 TGP 12/12/01 PRODUCTION RELEASE 1.0
ECO No. INITIALS DATE DESCRIPTION OF CHANGE ISSUE
Waterbeach
Cambridge CB5 9PB Contact Engineer: Travis Pierce Contact Tel: (01223) 203 200 Printed: 11-Dec-2001 Sheet 5 of 7 DRAWING NO. L940C5
D907 MOTSUP900
+
1N4003F C920 C918
1M0 25V 100N CD
Z905
0V_DIG 0V_DIG




7



8
BA6109




VCC1



VCC2
3
CC1 VOLM901
2
MD1
+5v
5
MC1




2
C913 VOLMOT900
10N CD 1Y271 SK900
R905 4 1 FFC10V




1
REF GND
33K MF
C912




9
8
7
6
5
4
3
2
1
10
R901 Q900 0V_DIG
6
BC556B 10N CD MC2
12K MF VOLM900 Disp H Disp F Disp D
+ 10 Disp B Z907A
MD2
9 0V_DIG 74HC4051 +5v
C901 100U EL CC2 Disp A R915
13 3
Disp I Disp GDisp EDisp C X0 X
14 220R MF
R900 X1
15
ACLT1 MOTOR DRIVER VOLUME DRIVE X2
1R0 FU 0V_DIG 12
X3
D906 +5v 1
X4
C900 1N4003F 5
X5
2
10N CD X6
4
TAPECONTROL X7
MOTE900
6
R904 INH
0V_DIG 11 +5v
R903 10R MF A
10
+ C915 B
100R MF