Arcam ALPHA 7 Schematic

87654321

LK1001

LINK10NP
LK1002

LINK10NP
LK1003

D

MAINS_N

C

MAINS_L

B

LINK10NP
LK1004

LINK10NP
LK1005

LINK10NP
LK1006

LINK10NP

MAINS_E

LK1007

LINK10NP
LK1008

LINK10NP
LK1009

LINK10NP
LK1010

LINK10NP
LK1011

LINK10NP
LK1012

LINK10NP

MAINS INPUT

SK201

!

IEC3

N E L

E

N

PD1

TOOLING

LK1013

LINK10NP
LK1014

LINK10NP
LK1015

LINK10NP
LK1016

LINK10NP
LK1017

LINK10NP
LK1018

LINK10NP

L

SW201A

T1

A1007

W10

Chassis Earth Point,
Use correct screw and washer.

LK1019

LINK10NP
LK1020

LINK10NP
LK1021

LINK10NP

LK1023

LINK10NP
LK1024

LINK10NP

PD2
TOOLING

MAINS SWITCH

SW201B

A1007

!

!

!

C201

4N7 MAINS

LK1025

LINK10NP
LK1026

LINK10NP
LK1027

LINK10NP
LK1028

LINK10NP
LK1029

LINK10NP
LK1030

LINK10NP

PD3
TOOLING

FS201

AS1A25

!

LK1031

LINK10NP
LK1032

LINK10NP
LK1033

LINK10NP
LK1034

LINK10NP
LK1035

LINK10NP
LK1036

LINK10NP

SELECT VOLTAGE
BY FITTING FS201
OR FS202

LK1037

LINK10NP
LK1038

LINK10NP
LK1039

LINK10NP

LK1041

LINK10NP
LK1042

LINK10NP

PD4
TOOLING

FS202

AS2A5_115V

ATE_PAD

FIT ONLY ONE FUSE

!

PD5
TOOLING

C200

1N0 CD

T2

!

GREEN

LK1043

LINK10NP
LK1044

LINK10NP
LK1045

LINK10NP
LK1046

LINK10NP
LK1047

LINK10NP
LK1048

LINK10NP

CAGECLAMP3

SK4

3

T3

2
1

BLUE2
ATE_PAD

SK5

1

CAGECLAMP1

LK1049

LINK10NP
LK1050

LINK10NP
LK1051

LINK10NP
LK1052

LINK10NP
LK1053

LINK10NP
LK1054

LINK10NP

NOTE :
ACLT WINDINGS ON
ALPHA 6 TX1 ONLY

TX1

230V

Orange

115V

Dark Grey
Blue

L815TX

SCREEN

Green

LK1055

LINK10NP
LK1056

LINK10NP
LK1057

LINK10NP
LK1058

LINK10NP
LK1059

LINK10NP
LK1060

LINK10NP

!

Grey

9Vac

Grey

CAGECLAMP2

SK7

Orange

Blue

Orange

CAGECLAMP3A

LK1062
LINK10NP

LK1063
LINK10NP

LK1064

LINK10NP
LK1065

LINK10NP
LK1066

LINK10NP

SK6

1
2
3

ATE_PAD

LK1067

LINK10NP
LK1068

LINK10NP
LK1069

LINK10NP
LK1070

LINK10NP
LK1071

LINK10NP
LK1072

LINK10NP

ACLT1

1
2

OR1

ATE_PAD

ATE_PAD

OR2

ATE_PAD

GREY1

GREY2
ATE_PAD

BLUE1

LK1073

LINK10NP
LK1074

LINK10NP
LK1075

LINK10NP
LK1076

LINK10NP
LK1077

LINK10NP
LK1078

LINK10NP

ACSENSE

D203

UF5403

D204

UF5403

D201

UF5403

D202

UF5403

LK1079

LINK10NP
LK1080

LINK10NP
LK1081

LINK10NP
LK1082

LINK10NP
LK1083

LINK10NP
LK1084

LINK10NP

LK1085

LINK10NP
LK1086

LINK10NP
LK1087

LINK10NP
LK1088

LINK10NP
LK1089

LINK10NP
LK1090

LINK10NP

TP1

+

C205

10M EL 50V

+37V

+

10M EL 50V

TP4

LK1091

LINK10NP
LK1092

LINK10NP
LK1093

LINK10NP
LK1094

LINK10NP
LK1095

LINK10NP
LK1096

LINK10NP

PSUP

C204

-37V

NSUP

C207
100N PC

LK1097

LINK10NP
LK1098

LINK10NP
LK1099

LINK10NP
LK1100

LINK10NP
LK1101

LINK10NP
LK1102

LINK10NP

C206
100N PC

POWRE

LK1103
LINK10NP
LK1104
LINK10NP
LK1105
LINK10NP
LK1106
LINK10NP
LK1107
LINK10NP
LK1108
LINK10NP

!

R204
470R FU
R205
470R FU
R206
470R FU

LK1109
LINK10NP
LK1110
LINK10NP
LK1111
LINK10NP
LK1112
LINK10NP
LK1113
LINK10NP
LK1114
LINK10NP

R201
470R FU
R202
470R FU
R203
470R FU

LK1115
LINK10NP
LK1116
LINK10NP
LK1117
LINK10NP
LK1118
LINK10NP
LK1119
LINK10NP
LK1120
LINK10NP

TP2

I

C208
4N7 PP

Z201
7815

Vin

LK1121
LINK10NP
LK1122
LINK10NP

LK1125
LINK10NP

C209
4N7 PP

I

TP5

Z202
7915

Vin

G

GND

Vout

LK1127

LINK10NP
LK1128

LINK10NP
LK1129

LINK10NP

LK1130
LINK10NP

LK1131

LINK10NP
LK1132

LINK10NP

G

GND

Vout

LK1133

LINK10NP
LK1134

LINK10NP
LK1135

LINK10NP

LK1136
LINK10NP

LK1137

LINK10NP
LK1138

LINK10NP

PS

Photo Strip

PHOTO_STRIP

P15V

P15V

O

+

O

N15V

C210
10U EL

TP3

+

C211
10U EL

PD10
TOOLING

N15V

TP6

EL2

UPDATE_BOX

DD

DRILL_DETAIL

PD11
TOOLING

WAF

WAF

WAF

Update Box

Drilling

Detail

Y1
TX WIRE CLIP

PD8
TARGET1

DD1

Drilling Detail

Issue Box

DD_ISSUE

Y2
TX WIRE CLIP

PD9
TARGET1

D

C

B

!

R207
100R MF

A

W12

WARNING SAFETY CRITICAL COMPONENT

!

REPLACE WITH IDENTICAL PART

1 2 3 4 5 6 7 8

MS

MAINS SW SPACER

MAINS_SW_SPACER

Test point for service engineers are shown as
See additional service documentation for details.

23425

DRAWING TITLE

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

ALPHA 7, 8, 8P & 5.2 AMP

Circuit Diagram

1 6Sheet of

Filename

C:\TEMP\L817c111.sch

TP28

Phil

DRAWN BY CHK BY

97_1055 UPGRADE MODS

UPGRADE CORRECTION CHANGES97-1062

ECO No.

9-Dec-1998

DATE

Z801 to Philips only97-1110

DESCRIPTION OF CHANGE

L817CT1 11

DRAWING NO.

A

ISSUE

87654321

101112

R701
47K MF

R601
47K MF

C702
47P CD

R702
820R MF

+

C602
47P CD

R602
820R MF

+

SW302D

PHINE

4PCO

LK701

10MM LINK

7

8

SW302C
4PCO

LK601

10MM LINK

100P PP

9

C601

100P PP

12

C701

12

D

PHINL

SK301A

N

EMC

F

1

PHONO4G

PHINR

C

C703
22U EL

C603

22U EL

3
2

R703
680K MF

5
6

R603
680K MF

Z305A
NE5532

C704

4N7 PP

Z305B

NE5532

C604

4N7 PP

SW302A

ON ALPHA 5.2 AMP ONLY

TP7

1

R704
56K MF
C705

1N3 PP

SW302B

4PCO

TP8

7

R604
56K MF

C605

1N3 PP

4PCO

FITTED BY HAND

C706

+

10U EL

12

10MM LINK

4
5

LK9

6

ON ALPHA 5.2 AMP ONLY

MINI_LK

C606

+

10U EL

12

10MM LINK

1
2
3

LK8

MINI_LK

R705

820R MF

LK702

FITTED BY HAND

R605

820R MF

LK602

SW305B
A1202

11

10

N

F

SK303B

PHONO4G

SW305A
A1202

12

1

9

8

7

TUNL COL AUXL AVL

TUNER CD AUX AV TAPE IN

SK301B

PHONO4G

N

F

C303

1N0 CD

TUNR COR AUXR AVR TAPR

EMC

N

F

SK302A

PHONO4G

1

N

F

SK302B
PHONO4G

N

EMC

F

1

SK303A

PHONO4G

2

3

4

5

6

C304

1N0 CD

TAPL

SW301B

R501
1K8 MF

TAPE OUT
8P - LINK

N

EMC

F

SK304A
PHONO4G

R401
1K8 MF

4

5

6

2PCO

8P ONLY

LK804
10MM LINK

1 2

TAPEOL

1

TAPEOR

LK803

1 2

10MM LINK

8P ONLY

SW301A
2PCO

1

PREAMP OUT

8P - PWR IN

SK304B
PHONO4G

2

3

R405
4K7 MF

N

F

PREOR

PREOL

PREOUTL

SIGE

PREOUTR

R505
4K7 MF

C305

47P CD

RV301B

20K LOG POT

C306

47P CD

RV301A
20K LOG POT

R402
47K MF

R502
47K MF

D

VOLL

C

VOLR

B

LK901A

1
2
3
4
5
6
7
8

L809CA

P15V

N15V

C301
10N CD

C302
10N CD

Key to component numbers:

0xx Power amp L
1xx Power amp R
2xx Power supply
3xx ICs / Switches
4xx Tone / balance L
5xx Tone / balance R
6xx MM phono L
7xx MM phono R
8xx Pre amp output L&R
9xx Remote control

23425

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

DRAWING TITLE

ALPHA 7, 8, 8P & 5.2 AMP

Circuit Diagram

2 6Sheet of

Filename

C:\TEMP\L817c211.sch

Phil

DRAWN BY CHK BY

UPGRADE MODS97_1055

97-1062 UPGRADE CORRECITON MODS

ECO No.

9-Dec-1998

DATE

Z801 to Philips only97-1110

DESCRIPTION OF CHANGE

L817CT2 11

DRAWING NO.

84

Z305C

A

1 2 3 4 5 6 7 8

NE5532

B

A

ISSUE

+37V

87654321

TP11

R4
100R FU

D2

C1

+

R2
4R7 W2 CF

C3
100N PC

TP14

TEST_POINT

IQ1L

R1
0R22 3W MO

TP15

TEST_POINT

IQ2L

TEST_POINT

D1
1N4003F

SK3
HPSKT

C2

47N PE

L1

2U2H LAC SMALL

R3

2R2 CF

PD6
TOOLING

R35
33K MF

R36
10R FU

R41
470R FU

R42

620R MF

C16

100U EL

DRAWING TITLE

ALPHA 7, 8, 8P & 5.2 AMP

Circuit Diagram

4 7Sheet of

Filename

C:\TEMP\L817c311.sch

L

LHC

RHC

R

PROT_OP_L

OP_L

RLY1A

RLY G5Z-2A-E

SPLE

PD6

R46
150R MF

+

SK3_6

4

SK3_7

5
2

3
1

6
7

R150
100R W2 CF

SPLD

SP2_SEND_L

SK1A

Top+

C17
470P CD

Top-

SK1C

CAMCON_G

CHASS

Q17
BC546B

CAMCON_G

R45
18K MF

C18

1N0 CD

Phil

DRAWN BY CHK BY

R26

R24
2K7 MF

D

33K MF

PWRIL

C

B

A

R40
33K MF

R31

R32

1K0 CF

2
3

C10

10U EL SG

PWRIL

Z301A

NE5532

+

AMPEL

TP9

SRVOL

C9

TEST_POINT

+

100U EL

R33

680K MF

R34

2K7 MF

100P PP

P15V

84

N15V

1 2 3 4 5 6 7 8

1

680K MF

C8

Z301C
NE5532

R38

R37
47K MF

R30
33K MF

BC557B

C6

47N PE

Q13

BC547B

Q11
BC547B

RV1
470R PSET

1K0 ON ALPHA 9

C21
10N CD

C22
10N CD

C7
4N7 PP

R25
330R MF

R29
1K2 CF

Q16

Q10

BC547B

R19
5K6 CF

R23
2K7 MF

15K MF

C13
15N PE

Q12

BC547B

R39

R15
1K0 CF

Q7

BC556B Q6

C5

33P PS

R20

15K MF

R22
120R MF

R28
18K MF

+

C15

10U EL

BC546B

R16
2K7 MF

C12

+

100U EL 100V

CL1
E82201

HS1

E81801

HS2

E81801

TP10

TEST_POINT

R17
8K2 CF

BC546B

R51
10K MF

R52
10K MF

Place Q15 by hsk.

TP12

TEST_POINT

Q9

HS3

E81801

Q15

CL2
E82201

BC556B

Q8
BC546B

R18
2K7 MF

R12

470R FU

Q4

BC546B

C4
47N PE

Q5

BC556B

R27
470R FU

HS4

E81801

C14
15N PE

Q3

BC556B

R10
470R FU

R13
1K0 MF

R14
1K0 MF

R11
470R FU

R8
470R FU

-37V

+

C11
100U EL 100V

R9
470R FU

D4

10V 400MW

470R FU

R21
100R MF

BC557B

D3
10V 400MW

R6
100R FU

TP13

TEST_POINT

Q1

IRF540

R5
100R FU

Q14

R1A
0R22 3W MO

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

10V 400MW

100U EL 100V
R7
470R FU

Q2
IRF540

23425

HPR

HPE

HPL

R49
330R 1W CF

R149

330R 1W CF

R50
100R W2 CF

R53
18K MF

SW99A
2PCO

10MM LINK

R47
4K7 MF

Q18
BC546B

ECO No.

1

2

12

LK1

4

5

SW99B
2PCO

SP2_RETN_L

9-Dec-1998

DATE

SW99_3

3

SW99_2

LK7

10MM LINK

1 2

6

C20

470P CD

VI_CH2

Z801 to Philips only97-1110

LK311

1
2
3
4
5
6
7

L825CA

SK1B

CAMCON_G

Q19

BC556B

UPGRADE MODS97_1055

LK311A

L825CA

SPLS

Bot+

A

Bot-

TP16

TEST_POINT

R48
47K MF

1
2
3
4
5
6
7

SP2_SEND_L
SP2_RETN_L

SP2_RETN_R
SP2_SEND_R
OP_L
OP_R

DESCRIPTION OF CHANGE

C19

+

100U EL

VI_PROTECT

L817CT397-1062 UPGRADE CORRECTION CHANGES

L817CT3 11

DRAWING NO.

D

C

B

A

ISSUE

87654321

R507
12K MF

Tone controls :
8dB cut and boost

C406
100P CD

C801
100P PP

C802
100P PP

C214
10N CD

C215

10N CD

C502
100N PC

R509
6K8 MF

R802
100K MF

(3k9 MF in 8P)

R806
100K MF

(3k9 MF in 8P)

D

C

B

VOLR

VOLR

VOLL

R516
1K8 MF

C507

100P CD

84

Z300C
4560D

84

3
2

Z302C
4560D

Z300A
4560D

R503
2K4 MF

R504
6K8 MF

TONOR

TONOL

84

C501

1

+

10U EL

6

SW304B

5
4

2PCO

3

SW304A

2
1

2PCO

R801

4K7 MF

(560R MF in 8P)

R805
4K7 MF

(560R MF in 8P)

P15V

Z304C
4560D

R506
470R MF

C212
10N CD

C213
10N CD

BASS

RV302A
20K LIN POT

R511
10K MF

C504
2N2 PP

RV303A
20K LIN POT

TREBLE

Pot arrow shows max boost

Z302A

3
2

4560D

R803
2K4 MF

Z302B

5
6

4560D

R807
2K4 MF

C216

10N CD

C217

10N CD

R804
5K6 MF

R808
5K6 MF

R508
12K MF

C503
100N PC

R510
6K8 MF

1

7

GND

8

16

VDD

Z801B
P74HC4052

PREG

5
6

TP19

TP20

Z304B

4560D

C508

10P CD

C805
10N CD

C806
10N CD

P15V

C505

TP17

+

7

10U EL

C803

+

10U EL

C804

+

10U EL

R815
1K2 MF

D801
4V7 400MW

D802
4V7 400MW

R512
18K MF

R809
100K MF

R515
6K8 MF

R817
5K6 MF

VOLL

PREN

RV304A
20K LIN POT

BALANCE

R810
100K MF

TP21

R416
1K8 MF

TONOR

12
14
15
11

1
5
2
4

6
9

10

C407
100P CD

D803
1N4148

PREMUTE

Z801A

1Y0
1Y1
1Y2
1Y3

2Y0
2Y1
2Y2
2Y3

INH
S1
S0

P74HC4052

Z300B

4560D

5
6

R404
6K8 MF

R403
2K4 MF

1Z

2Z

VEE

PREMUTEPREP

C401

R406

7

+

470R MF

10U EL

R811

13

220R MF

R812

3

220R MF

7

R407
12K MF

C402
100N PC

Tone controls :
8dB cut and boost

R409
6K8 MF

C506
100P CD

R813
22K MF

BASS

RV302B
20K LIN POT

R411
10K MF

C404
2N2 PP

RV303B
20K LIN POT

TREBLE

Pot arrow shows max boost

R819
8K2 MF

R814
22K MF

R408
12K MF

C403
100N PC

R410
6K8 MF

Z304A

3
2

4560D

C408

10P CD

PWRIR

PWRIL

*** NOTE! ***

R818
8K2 MF

8P ONLY8P ONLY

PCB has two links,
LK801, LK802 in place of
R818 and R819.
THE RESISTORS SHOULD BE
FITTED ON THE 8P - NOT THE LINKS.

PREOUTR

PREOUTL

FIT LINKS AS BELOW

LINK HK5.2 7 8 8P

1

2
3
4
5
6

7
601
602
701
702
803
804

1

TP18

C405

10U EL

D

R412
18K MF

+

RV304B
20K LIN POT

BALANCE

R415
6K8 MF

TONOL

C

B

N15V

A

1 2 3 4 5 6 7 8

N15V

R816
1K2 MF

23425

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

DRAWING TITLE

ALPHA 7, 8, 8P & 5.2 AMP

Circuit Diagram

4 6Sheet of

Filename

C:\TEMP\L817c411.sch

Phil

DRAWN BY CHK BY

97_1055

ECO No.

9-Dec-1998

DATE

UPGRADE MODS

UPGRADE CORRECITON MODS97-1062

Z801 to Philips only97-1110

DESCRIPTION OF CHANGE

L817CT4 11

DRAWING NO.

A

ISSUE

+37V

87654321

+37V

R126

R124

D

R140
33K MF

R131
1K0 CF

SRVOR

C109

+

100U EL

Z301B

6
5

R132

NE5532

33K MF

C

PWRIR

PWRIR

B

680K MF

C110

+

10U EL SG

AMPER

R133

R134

2K7 MF

100P PP

7

680K MF

C108

R138

TEST_POINT

R137
47K MF

R130
33K MF

2K7 MF

BC557B

TP22

C107

4N7 PP

C106

47N PE

RV101
470R PSET

1K0 ON ALPHA 9

Q111
BC547B

Q113

BC547B

R125
330R MF

R129
1K2 CF

Q116

Q110

BC547B

R119
5K6 CF

R123
2K7 MF

C113
15N PE

Q112

BC547B

R139

15K MF

R115
1K0 CF

Q107

BC556B Q106

C105

33P PS

R120

15K MF

R122
120R MF

R128
18K MF

+

C115

10U EL

Q119

BC546B

R116
2K7 MF

C112

+

100U EL 100V

R117
8K2 CF

TP23

TEST_POINT

R151
10K MF

Q115
BC546B

R152
10K MF

TP24

TEST_POINT

BC556B

Q108
BC546B

R118
2K7 MF

R112

470R FU

Q104

BC546B

C104
47N PE

Q105

BC556B

R127
470R FU

C114
15N PE

Q103

BC556B

R110
470R FU

R113
1K0 MF

R114
1K0 MF

R111
470R FU

R108
470R FU

+

C111
100U EL 100V

R109
470R FU

D104

10V 400MW

470R FU

R121
100R MF

D103
10V 400MW

R106
100R FU

IRF540

R101A
0R22 3W MO

TP27

TEST_POINT

-37V

Q101

R105
100R FU

Q114
BC557B

R107
470R FU

TP26

TEST_POINT

D102

10V 400MW

C101

100U EL 100V

Q102
IRF540

R101
0R22 3W MO

D101
1N4003F

R104
100R FU

C102

47N PE

+

R102
4R7 W2 CF

C103

100N PC

IQ1R

IQ2R

L101

2U2H LAC SMALL

R103

2R2 CF

R135
33K MF

R136
10R FU

R141

470R FU

R142
620R MF

100U EL

VI_PROTECT

PROT_OP_L

C116

OP_R

RLY1B
RLY G5Z-2A-E

PD6

CHASSIS

EARTH

R146
150R MF

+

C118

1N0 CD

PROTIN

R153
47K MF

R154
47K MF

SPRD

C117
470P CD

Q117
BC546B

ACDET

SK2A

CAMCON_G

SK2C

CAMCON_G

SPRE

R145
18K MF

SP2_SEND_R

Top+

LK2

10MM LINK

Top-

CHASS

LED201

G

R

12

12

A

LED RED/GRN

D105
1N4003F

R156
470R FU

R155
47K MF

C123

+

100U EL

R147
4K7 MF

Q118
BC546B

ACSENSE

TEST_POINT

TP25

R157
100K MF

C119

+

1U0 EL

R165
47K MF

LK805A

1
2
3

L815CA

VI_CH2

IN1

IN2

Z303

TA7317P

R164

18K MF

LK805

L815CA

-37V

1
2
3

R158
47K MF

PWR

V-

SP2_RETN_R

R159
100K MF

C122

100U EL

RC

0V

D108
5V6 400MW

V+
FB

C121

1U0 EL

+

O

+

R163

33K MF

C120

470P CD

R160
10K MF

D106
1N4003F

MUTE

Q120
2SC2547

R162
47K MF

R166
2K7 1W CF

R161
1K0 1W CF

12

SK3_6

SK3_7

LK3

10MM LINK

FIT ALL
BUT HK

LK4

1 2

10MM LINK

PROTE

PREMUTE

+37V

R167
2K7 1W CF

D107

1N4003F

SPRS

SK2B

Bot+

Bot-

CAMCON_G

RLY1C
RLY G5Z-2A-E

SW99_2

SW99_3

12

LK5

10MM LINK

12

LK5 & LK6 FIT

FOR HK ONLY

LK6

10MM LINK

PROT

D

C

B

A

1 2 3 4 5 6 7 8

23425

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

DRAWING TITLE

A7, 8, 8P & 5.2 AMP

Circuit Diagram

5 6Sheet of

Filename

C:\TEMP\L817c511.sch

9-Dec-1998

Phil

DRAWN BY CHK BY

97_1055 UPGRADE MODS

UPGRADE CORRECTION CHANGES97-1062

Z801 to Philips only97-1110

ECO No.

DATE

DESCRIPTION OF CHANGE

L817C5 11

DRAWING NO.

A

ISSUE

4321

WARNING SAFETY CRITICAL COMPONENT

D903

MOTSUP

1N4003F

D

W11

3

!

ACLT1

ACLT2

C

R901
1R0 FU

MOTE

C901
10N CD

D901

1N4003F

C902

1M0 10V

R902
100R MF

+5V

+

TEST_POINT
R903
100R MF

10N CD

D902
5V6 400MW

TP29

C903

REMO

C904
10N CD

R904
1K8 MF

LK902A

5

4

D904
5V6 400MW

6

9

Z901
PIC16C54XT

17

RA0

18

RA1

1

RA2

2

RA3

3

RTCC

4

1

MCLR

TP30

TEST_POINT

CC1

MC1

REF

MC2

CC2

Z902
BA6109

VCC17VCC2

MOTOR DRIVER

VOLUME DRIVE

RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7

8

D905
1N4148

2

1

10

MD1

GND

MD2

6
7
8
9
10
11
12
13

2

B

RX1
SBX1610-52

+5V

3

L815CA

3

OSC1

VSS

OSC2

VDD

+5v

5

16

15

14

+ C907

1M0 25V

C905
10N CD

R905
4K7 MF

VOLM1

VOLM2

C906
10N CD

1 2

MUTE

VOLMOT
1Y271

TP31

TEST_POINT

MOT+
MOT-

TP32

TEST_POINT

RV901C
6A330M

LK901
L809CA

+

+ -

7
9

Case

RV901A

1

6A330M

D

2
3
4
5
6
7
8

RV901B
6A330M

C

VOLMOTA

C1000
10N CD

1Y271

1 2

RV901D
6A330M

B

A

W13

REPLACE WITH IDENTICAL PART

!

X901

CST4.19MG

P5V

DRAWING TITLE

GND

1

+5V

O/P

Case

2

LK902

1
2
3

L815CA

23425

ALPHA 8 AMP RC

A & R Cambridge LTD
Pembroke Avenue

Circuit Diagram

Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

Filename

C:\TEMP\L817c611.sch

6 6Sheet of

Phil

DRAWN BY CHK BY

1 2 3 4

97_1055 UPGRADE MODS

UPGRADE CORRECTION MODS97-1062

ECO No.

9-Dec-1998

DATE

Z801 to Philips only97-1110

DESCRIPTION OF CHANGE

A

L817CT6 11

ISSUEDRAWING NO.