Arcam FMJ A-32 Schematic

Service Manual

ARCAM

FMJ A32, P35 & P35/3
Amplifi ers

A32

Issue 1.0

ARCAM

Contents List

!

Phono board L870

o Circuit description
o Component overlay
o Parts list
o Circuit diagrams

!

Amplifier & PSU board L882

o Circuit description
o Component overlay
o Parts list
o Circuit diagrams

!

Display board L928

o Component overlay
o Parts list
o Circuit diagrams

!

Preamplifier board L937

o Circuit description
o Component overlay
o Parts list
o Circuit diagrams

!

3rd Channel Amplifier board L911

o Component overlay
o Parts list
o Circuit diagrams

!

Transformer specifications

o L914TX
o L915TX

!

General assembly

o A32 - Mechanical parts list
o P35 - Mechanical parts list
o P35/3 - Mechanical parts list

87654321

D

C

LEFT CHANNEL

C1
100N CD

SK1
PHONO2HG

EMC

1

0V_SIG

0V_SIG

Q_1

Q_2

L870C2_2.0.SCH

LEFT IN LEFT OUT

RIGHT CHANNEL
L870C3_2.0.SCH

RIGHT IN RIGHT OUT

Q_3

Q_4

+15V

Q_6

-15V

SK2
1
2
3
4
5
6
7
8

AMPCT8

0V_HF0V_SIG

Q_5

Q_7 Q_8

D

C

B

A

PCB1

PCB

L870PB_2

1 2 3 4 5 6 7 8

EL1

Update Box

UPDATE_BOX

DRAWING TITLE

A85 PHONO STAGE - TOP LEVEL

23425

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

Notes:

Filename

G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870c1_2.0.PRJ

Circuit Diagram

01_1070 JAG 17/4/01 updated pcb and scm 2

00_1051 JAG 22/3/01 PRODUCTION ISSUE 1

ECO No. DESCRIPTION OF CHANGE

INITIALS

Date Printed

DATE

Drawn by:

JBR23-Apr-2001

1 3Sheet of

DRAWING NO.

L870C1

B

A

ISSUE

87654321

+

C102
100U SILMIC

R111
56K MF

R124

5K6 MF

R123
10R MF

C119

100P PP

C101

1N0 PP

C110

4N7 PP
C120

1N0 PP

C112

10N PP AX
C111

10N PP AX

R112
100K MF

C105
100N PE

Q_101

R113
100K MF

R114
100K MF

R115
15K MF

TL071CD

R101
100R MF

TR102
BC556B

TR108
BC546B

R116
2M2 MF

74

IC100

3

6

C118

2

10U NP

R117
2M2 MF

TR104
BC556B

D

TR100
BC556B

+

C100
22U EL

R109
12K MF

R110
12K MF

LEFT IN

C

R104
100R MF

SW100B
4PCO

5

6

C108
470P PPW

4

R108
47K MF

C109

100P PPW

TR106
2SA1085

R100
330R MF

TR101
BC556B

TR107
2SA1085

C115
1N3 PP

SW100D
4PCO

R105
100R MF

101112

Q_102

R102
100R MF

TR103
BC556B

D100
1N4148

C104

100N PE

0V_SIG0V_HF

C106
100N PE

+15V

TR109
BC546B

R118
22R MF

R119
22R MF

TR105
BC556B

C113

1U0 PE

0V_SIG

R122
39K MF

D

C

LEFT OUT

0V_SIG0V_SIG

B

TR110
BC546B

D101
1N4148

R120
22R MF

A

1 2 3 4 5 6 7 8

TR111
BC546B

D102
1N4148

R121
22R MF

DRAWING TITLE

A85 PHONO STAGE - LEFT CHANNEL

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

C116

470P PPW

23425

TR112
BC546B

+

C103
100U SILMIC

Notes:

Filename

G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870C2_2.0.SCH

TR113
BC546B

TR114
BC546B

R106
100R MF

0V_SIG0V_HF

Circuit Diagram

C117
470P PPW

C107
100N PE

Q_103

-15V

01_1070 JAG 17/4/01 updated pcb and scm 2

00_1051 JAG 22/3/01 PRODUCTION ISSUE 1

ECO No. DESCRIPTION OF CHANGE

INITIALS

Date Printed

DATE

Drawn by:

JBR23-Apr-2001

2 3Sheet of

DRAWING NO.

L870C2

B

A

ISSUE

87654321

+

C202
100U SILMIC

R211
56K MF

R224

5K6 MF

9

R223
10R MF

C219

100P PP
C201

1N0 PP
C210

4N7 PP

C220

1N0 PP

C212

10N PP AX
C211

10N PP AX

R212
100K MF

C205
100N PE

Q_201

R213
100K MF

R214
100K MF

R215
15K MF

TL071CD

R201
100R MF

TR202
BC556B

TR208
BC546B

R216
2M2 MF

74

IC200

6

3
2

C218
10U NP

R217
2M2 MF

TR204
BC556B

D

TR200
BC556B

+

C200
22U EL

R209
12K MF

R210
12K MF

RIGHT IN

C

R204
100R MF

SW100A
4PCO

2

3

C208

470P PPW

1

R208
47K MF

C209

100P PPW

TR206
2SA1085

R200
330R MF

TR201
BC556B

TR207
2SA1085

R205
100R MF

C215
1N3 PP

7

SW100C
4PCO

8

Q_202

R202
100R MF

TR203
BC556B

D200
1N4148

C204

100N PE

0V_SIG0V_HF

C206
100N PE

+15V

TR209
BC546B

R218
22R MF

R219
22R MF

TR205
BC556B

C213

1U0 PE

0V_SIG

R222
39K MF

D

C

RIGHT OUT

C217

0V_SIG0V_SIG

B

TR210
BC546B

D201
1N4148

R220
22R MF

A

TR211
BC546B

D202
1N4148

R221
22R MF

DRAWING TITLE

A85 PHONO STAGE - RIGHT CHANNEL

23425

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

1 2 3 4 5 6 7 8

Cambridge CB5 9PB

470P PPW

TR212
BC546B

+

C203
100U SILMIC

Notes:

Filename

G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870C3_2.0.SCH

TR213
BC546B

TR214
BC546B

R206
100R MF

0V_SIG0V_HF

Circuit Diagram

470P PPWC216

C207
100N PE

Q_203

-15V

01_1070 JAG 17/4/01 updated pcb and scm 2

00_1051 JAG 22/3/01 PRODUCTION ISSUE 1

ECO No. DESCRIPTION OF CHANGE

INITIALS

Date Printed

DATE

Drawn by:

JBR23-Apr-2001

3 3Sheet of

DRAWING NO.

L870C3

B

A

ISSUE

87654321

D

C

FROM PREAMP

B

SK102

1
2
3
4

AMPCT4

0V_SIG

SK103

1
2
3
4
5
6
7
8
9
10
11
12
13
14

FFC 14W 2.54MM VER
8K7014

L882C3

SW100A
2PCO

2

PL100

2

C100
1N0 SM

PL101

2

5

L882C3_4.1.SCH

INPUT
0V_SIG

0V_HF
VPOS
VNEG

L882C4
L882C4_4.1.SCH

INPUT
0V_SIG

0V_HF
VPOS
VNEG

3

1

SK104B

TP100

0V_SIG

PHONO4G

1

6

TP103

F

N

TP104

TP105

TP106

VIPROT

DCPROT

OUTPUT0V_LS

VIPROT

DCPROT

OUTPUT0V_LS

TP107

TP108

TP101

TP102

TP109

VIPROT_L
DCPROT_L
LS L

VIPROT_R
DCPROT_R
LS R

TP110

TP117

L SIG
R SIG

0V_D
0V_PSU

STANDBY
VIPROT_L
VIPROT_R
0V_TRIG
DCPROT_L
DCPROT_R

LS L

0V_LS_L

LS R

LS L

TP111 TP113 TP115

0V_LS_L

LS R

TP112 TP114 TP116

0V_LS_R

L882C2
L882C2_4.1.SCH

0V_D +5V(D)
0V_PSU
PWRON

VIPROT_R VIPROT_uC
DCPROT_L

DCPROT_R

SK106
1
2
3
4

AMPCT4

4
5

SK105

HPSKT

RLY100A

RLY G5Z-2A-E

RLY100B

RLY G5Z-2A-E

2
3
1

6
7

THPROT_uCVIPROT_L

AC_PRES0V_TRIG

DCPROT_uC

TP118

TP120

SK100A

Top+

Top-

CAMCON_G

SK101A

Top+

Top-

CAMCON_G

VPOS
VNEG

RC5 IN

TRG IN

TP119

R105
100R 1W CF

L SIG
0V_SIG
0V_LS_L
0V_HF_L
+49V

-49V +5V_D

R SIG
0V_SIG
0V_LS_R
0V_HF_R
+49V

-49V

1

1

SK104A

F

EMC

N

PHONO4G

0V_SIG

SW100B
2PCO

4

INTEGRATED / PRE-POWER
MODE SELECT SWITCH

+5V_D

R100

+49V

10R MF

STANDBY
SPKR1 ON
SPKR2 ON
THERMPROT
VIPROT
DCPROT
AC PRESENT
TRIGGER
REMOTE
0V_D

+49V

-49V
THERMPROT
VIPROT
AC PRESENT
DCPROT
REMOTE
TRIGGER

R103
330R 1W CF

R104
330R 1W CF

R106
100R 1W CF

RLY101A

RLY G5Z-2A-E

RLY101B

RLY G5Z-2A-E

SK107
1
2
3
4

AMPCT4

SK100B

Bot+

Bot-

CAMCON_G

SK101B

Bot+

Bot-

CAMCON_G

D100

1N4003F

TR100
BD179

0V_TRIG

0V_D

RLY100C
RLY G5Z-2A-E

R107
220R SM

TR101
BD179

34

5 6

TP121

1 2

SP100

STAR_8

RLY101C
RLY G5Z-2A-E

R101
100R SM

R102
100R SM

R108
220R SM

78

D101
1N4003F

PCB

L882PB_4
EL

EARTH LEAD

EARTH LEAD

PCB

8M101

+49V

0V_SIG
0V_HF_R
0V_LS_R
0V_LS_L0V_HF_L
0V_PSU

SPKR1 ON

SPKR2 ON

0V_D

D

C

B

A

1 2 3 4 5 6 7 8

DRAWING TITLE

A85 amplifier and PSU - top sheet

23425

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

Notes:

Filename

L882C1_4.1.PRJ

Circuit Diagram

02_E062 JBR 20/3/02 LDO REG FITTED TO IC201 4.1
02_E035 JBR 4/2/2002 FUSE VALUES UPRATED TO T4A 4.0

ECO No. DESCRIPTION OF CHANGE

Date Printed

INITIALS

20-Mar-2002

DATE

Drawn by:

J Reckless

1 4Sheet of

DRAWING NO.

L882C1

ISSUE

A