Arcam FMJ A32 User manual

A32
FMJ A32, P35 & P35/3
Amplifiers
Service Manual
ARCAM
ARCAM
Issue 1.0

Contents List
! Phono board L870
oCircuit description
oComponent overlay
oParts list
oCircuit diagrams
! Amplifier & PSU board L882
oCircuit description
oComponent overlay
oParts list
oCircuit diagrams
! Display board L928
oComponent overlay
oParts list
oCircuit diagrams
! Preamplifier board L937
oCircuit description
oComponent overlay
oParts list
oCircuit diagrams
! 3
rd
Channel Amplifier board L911
oComponent overlay
oParts list
oCircuit diagrams
! Transformer specifications
oL914TX
oL915TX
! General assembly
oA32 - Mechanical parts list
oP35 - Mechanical parts list
oP35/3 - Mechanical parts list

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Filename ECO No. DESCRIPTION OF CHANGE
G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870c1_2.0.PRJ
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A85 PHONO STAGE - TOP LEVEL
Circuit Diagram
L870C1
JBR23-Apr-2001
INITIALS
Date Printed 1 3Sheet of
Notes:
1
EMC
SK1
PHONO2HG
0V_SIG
0V_SIG
LEFT IN LEFT OUT
LEFT CHANNEL
L870C2_2.0.SCH
RIGHT IN RIGHT OUT
RIGHT CHANNEL
L870C3_2.0.SCH
1
2
3
4
5
6
7
8
SK2
AMPCT8
+15V
-15V
0V_HF0V_SIG
Q_1
Q_2
Q_3
Q_4
Q_5
Q_6
Q_7 Q_8
PCB
PCB1
L870PB_2
Update Box
EL1
UPDATE_BOX
C1
100N CD
00_1051 JAG 22/3/01 PRODUCTION ISSUE 1
01_1070 JAG 17/4/01 updated pcb and scm 2

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Filename ECO No. DESCRIPTION OF CHANGE
G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870C2_2.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A85 PHONO STAGE - LEFT CHANNEL
Circuit Diagram
L870C2
JBR23-Apr-2001
INITIALS
Date Printed 2 3Sheet of
Notes:
TR106
2SA1085 TR107
2SA1085
R120
22R MF R121 22R MF
R105
100R MF
R108
47K MF
R101
100R MF R102 100R MF
+C102
100U SILMIC
+C103
100U SILMIC
R100
330R MF
+C100
22U EL
R109
12K MF
R110
12K MF
C105
100N PE
R117
2M2 MF
R111
56K MF
R113
100K MF
R114
100K MF
TR111
BC546B
TR110
BC546B
TR114
BC546B
TR112
BC546B TR113 BC546B
TR100
BC556B
TR101
BC556B
TR102
BC556B TR103 BC556B
TR104
BC556B TR105 BC556B
TR108
BC546B TR109 BC546B
+15V
-15V
R122
39K MF
R112
100K MF
R115
15K MF
4 5 6
SW100B
4PCO
10 11 12
SW100D
4PCO
R104
100R MF C108
470P PPW R123
10R MF
C104
100N PE
C107
100N PE
R116
2M2 MF
3
2
6
74
IC100
TL071CD
0V_SIG0V_SIG
D100
1N4148
R118
22R MF
R119
22R MF
C106
100N PE
0V_SIG0V_HF
0V_SIG
0V_SIG0V_HF
D101
1N4148 D102 1N4148
R106
100R MF
LEFT IN
LEFT OUT
Q_101
Q_102
Q_103
C109
100P PPW
R124
5K6 MF
C117
470P PPW
C116
470P PPW
C111
10N PP AX
C112
10N PP AX
C118
10U NP
C113
1U0 PE
C115
1N3 PP
C110
4N7 PP
C101
1N0 PP
C119
100P PP
00_1051 JAG 22/3/01 PRODUCTION ISSUE 1
C120
1N0 PP
01_1070 JAG 17/4/01 updated pcb and scm 2

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G:\DATA\ECO\ECO AGENDA\01_1070 l870 A85 PHONO ISSUE2\L870_2.0.ddb - L870C3_2.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A85 PHONO STAGE - RIGHT CHANNEL
Circuit Diagram
L870C3
JBR23-Apr-2001
INITIALS
Date Printed 3 3Sheet of
Notes:
TR206
2SA1085 TR207
2SA1085
R220
22R MF R221 22R MF
R205
100R MF
R208
47K MF
R201
100R MF R202 100R MF
+C202
100U SILMIC
+C203
100U SILMIC
C209
100P PPW
R200
330R MF
+C200
22U EL
R209
12K MF
R210
12K MF
C205
100N PE
R217
2M2 MF
R211
56K MF
R213
100K MF
R214
100K MF
TR211
BC546B
TR210
BC546B
TR214
BC546B
TR212
BC546B TR213 BC546B
TR200
BC556B
TR201
BC556B
TR202
BC556B TR203 BC556B
TR204
BC556B TR205 BC556B
TR208
BC546B TR209 BC546B
+15V
-15V
R222
39K MF
R212
100K MF
R215
15K MF
1 2 3
SW100A
4PCO
7 8 9
SW100C
4PCO
R204
100R MF
C208
470P PPW R223
10R MF
C204
100N PE
C207
100N PE
R216
2M2 MF
3
2
6
74
IC200
TL071CD
0V_SIG0V_SIG
D200
1N4148
R218
22R MF
R219
22R MF
C206
100N PE
0V_SIG0V_HF
0V_SIG
0V_SIG0V_HF
D201
1N4148 D202 1N4148
R206
100R MF
RIGHT IN
RIGHT OUT
Q_201
Q_202
Q_203
R224
5K6 MF
C217
470P PPWC216
470P PPW
C215
1N3 PP
C211
10N PP AX
C212
10N PP AX
C218
10U NP
C213
1U0 PE
C219
100P PP
C210
4N7 PP
C201
1N0 PP
00_1051 JAG 22/3/01 PRODUCTION ISSUE 1
C220
1N0 PP
01_1070 JAG 17/4/01 updated pcb and scm 2

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Filename ECO No. DESCRIPTION OF CHANGE
L882C1_4.1.PRJ
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A85 amplifier and PSU - top sheet
Circuit Diagram
L882C1
J Reckless
20-Mar-2002
INITIALS
Date Printed 1 4Sheet of
Notes:
Top+
Top-
SK100A
CAMCON_G
Bot+
Bot-
SK100B
CAMCON_G
Top+
Top-
SK101A
CAMCON_G
Bot+
Bot-
SK101B
CAMCON_G
D100
1N4003F D101 1N4003F
1 2
34
5 6
78
SP100
STAR_8
EMC
1
N
FSK104A
PHONO4G
N
F
SK104B
PHONO4G
0V_SIG
0V_SIG
0V_SIG
1 2 3
SW100A
2PCO
4 5 6
SW100B
2PCO
C100
1N0 SM
1
2
3
4
SK102
AMPCT4
STANDBY
SPKR1 ON
SPKR2 ON
THERMPROT
VIPROT
DCPROT
AC PRESENT
L SIG
R SIG
SPKR1 ON
SPKR2 ON
THERMPROT
VIPROT
AC PRESENT
DCPROT
LS L
LS R
L SIG
0V_SIG
0V_LS_L
0V_HF_L
+49V
-49V +5V_D
+49V
-49V
0V_D
0V_PSU
R SIG
0V_SIG
0V_LS_R
0V_HF_R
+49V
-49V
0V_TRIG
LS L
0V_LS_L
0V_LS_R
LS R
+49V
0V_D
VIPROT_L
DCPROT_L
DCPROT_L
VIPROT_R
DCPROT_R DCPROT_R
VIPROT_L
VIPROT_R
STANDBY
+49V
+5V_D
0V_D
0V_PSU
0V_LS_R
0V_HF_R
0V_LS_L0V_HF_L
0V_D
0V_TRIG
0V_SIG
R103
330R 1W CF
R104
330R 1W CF
R105
100R 1W CF R106 100R 1W CF
1
2
3
4
SK106
AMPCT4
2
3
1
4
5
6
7
SK105
HPSKT
1
2
3
4
SK107
AMPCT4
LS L
LS R
0V_LS_L
REMOTE
REMOTE
FROM PREAMP
INTEGRATED / PRE-POWER
MODE SELECT SWITCH
TRIGGER
TRIGGER
TP102
TP101
TP100
TP103
TP104
TP105
TP106
TP107
TP108
TP109
TP110
TP117
TP111 TP113 TP115
TP112 TP114 TP116
0V_D +5V(D)
VPOS
VNEG
0V_PSU
PWRON THPROT_uCVIPROT_L
VIPROT_R VIPROT_uC
AC_PRES0V_TRIG
DCPROT_L
DCPROT_R DCPROT_uC RC5 IN
TRG IN
L882C2
L882C2_4.1.SCH
INPUT
0V_SIG VIPROT DCPROT
OUTPUT0V_LS
0V_HF
VPOS
VNEG
L882C3
L882C3_4.1.SCH
INPUT
0V_SIG VIPROT DCPROT
OUTPUT0V_LS
0V_HF
VPOS
VNEG
L882C4
L882C4_4.1.SCH
RLY100A
RLY G5Z-2A-E
RLY100B
RLY G5Z-2A-E
RLY100C
RLY G5Z-2A-E
RLY101A
RLY G5Z-2A-E
RLY101B
RLY G5Z-2A-E
RLY101C
RLY G5Z-2A-E
TR100
BD179
TR101
BD179 R101
100R SM
R102
100R SM
R107
220R SM R108 220R SM
PCB
PCB
L882PB_4
TP118
TP119
TP120
TP121
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SK103
FFC 14W 2.54MM VER
8K7014
EARTH LEAD
8M101
EL
EARTH LEAD
1 2
PL100
1 2
PL101
R100
10R MF
02_E035 JBR 4/2/2002 FUSE VALUES UPRATED TO T4A 4.0
02_E062 JBR 20/3/02 LDO REG FITTED TO IC201 4.1

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Filename ECO No. DESCRIPTION OF CHANGE
L882C2_4.1.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A85 amplifier - power supply and microcontroller interface
Circuit Diagram
L882C2
J Reckless
20-Mar-2002
INITIALS
Date Printed 2 4Sheet of
Notes:
L
N
E
NEL
SK203
IEC3 NO RIVETS
BC200
TOOLING4.1
Green
1
SK202
CAGECLAMP1
C205
3N3 MAINS C206
3N3 MAINS
Far from PCB
SK201B
JACK3.5X2
Near to PCB
SK201A
JACK3.5X2
SW200B
VOL SEL SLIDE
SW200A
VOL SEL SLIDE
C208
3N3 MAINS
C207
3N3 MAINS
Vin
I
GND
G
Vout O
IC201
L4940V5
D203
1N4003F
D201
1N4003F
D202
1N4003F
D200
1N4003F
C225
100N CD C226 100N CD
VR201
VDR 115V
VR200
VDR 115V
+1
~2
-
4
~
3
BR200
BRGBU8D
LIVENEUTRAL
EARTH
EMC Shield
SH200
EMCMAINS
NEUTRAL
LIVE
LIVE
NEUTRAL
0V_D
+5V(D)
0V_D
0V_PSU
VPOS
VNEG
0V_PSU
+49V
+5V_D
0V_D
PWRON
-49V
+5V_D
TH200
PTH90DEG
+5V_D
0V_D
THPROT_uC
VIPROT_L
VIPROT_R
+5V_D
0V_D
VIPROT_uC
0V_D
9VRMS
+5V_D
0V_D
9VRMS
+C229
22U EL
AC_PRES
+
C227
3300u 25V
+C228
1000u 10V
2
3
4
6
7
8
1 5
SK204
MOLEXPWR8
1
2
3
4
5
6
SK200
MOLEXPWR6
D206
BAS16W SM
TR204
BC849B
R211
10K SM
R220
10R SM
R200
1K0 SM TR202
FMMT597
D205
BAS16W SM C213
10N SM
TR203
FMMT497
DZ207
15V 350MW SM
+C223
10U EL
+C222
10U EL
R210
10K SM
+49V
0V_TRIG
0V_TRIG
1 2
IC202A
74HC14D
3 4
IC202B
74HC14D
1011
IC202E
74HC14D
1213
IC202F
74HC14D
C214
10N SM
C215
10N SM
R213
4K7 SM
R214
4K7 SM
TR205
BC856B
R206
1K0 SM C218
10N SM
C203
100N SM
DCPROT_L
DCPROT_R
+5V_D
0V_D
DCPROT_uC
0V_D
5 6
IC202C
74HC14D
89
IC202D
74HC14D
C216
10N SM
C217
10N SM
R215
4K7 SM
R216
4K7 SM
TR206
BC856B
R207
1K0 SM C220
100N SM
C204
100N SM
14
7
IC202G
74HC14D C201
100N SM C202 100N SM
R205
1K0 SM
R221
10R SM
C224
100N CD
R219
1K8 SM
R212
4K7 SM
TR201
FMMT497
TRIGGER OUTPUT
APPROX 13.5VDC
60mA MAX CURRENT
R201
1K0 SM
R202
1K0 SM
R203
1K0 SM
R204
1K0 SM
C219
10N SM
C221
10N SM
MAINS WIRING AND AUXILIARY SUPPLY
POWER AMP SUPPLY
MICROPROCESSOR SIGNALS INTERFACE
HS
HS200
TO220HS08REG
1
2
3
4
5
6
SK205
AMPCT6
RLY200A
DPDT5V
RLY200B
DPDT5V
RLY200C
DPDT5V
115V
115V 6
4
2
10V
5
8
9V
0V
9V
37
0V
TX200
TX 3VA 9301
TR200
BD179
R217
10R SM
R218
10K SM
STANDBY RELAY CONTROL
R227
1K0 SM DZ204
4V7 350MW SM
R228
100K SM
L200
27mH C200
680P PP
3
21
IC200A
LM393A SM
R223
10K SM
R229
100K SM
R209
10K SM
R224
1K8 SM
R230
1K5 SM
5
6
7
IC200B
LM393A SM
84
IC200C
LM393A SM
R225
1K8 SM
C231
1N0 SM
R208
10K SM
C232
100N SM
0V_TRIG
+5V_D
RC5 IN
CARRIER FILTER AND DEMODULATOR
C230
10N SM
MODULATED RC5
REMOTE CONTROL INPUT
+C233
10U EL
R222
10K SM
TRG IN
TP206
TP200
TP207
TP203
TP201
TP202
TP210
TP204
TP205
TP208
TP209
TP211
TP212
+C209
10,000u 63V
+C210
10,000u 63V
R226
470R SM
C211
100N PC
C212
100N PC
CHASS
SK101C
CAMCON_G
C235
1N0 SM
C234
220N X2 CLASS
R231
1M5 VR25
NF
NF
F202
T750mA SM
02_E035 JBR 4/2/2002 FUSE VALUES UPRATED TO T4A 4.0
F200
T4A
F201
T4A
02_E062 JBR 20/3/02 LDO REG FITTED TO IC201 4.1

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Filename ECO No. DESCRIPTION OF CHANGE
L882C3_4.1.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A85 amplifier - power output stage left
Circuit Diagram
L882C3
J Reckless
20-Mar-2002
INITIALS
Date Printed 3 4Sheet of
Notes:
R324
1K0 SM
TR300
FMMT597 TR301 FMMT597
R315
100R SM R316 100R SM
R319
100R SM
TR314
FMMT497 TR315
FMMT497
R317
100R SM R318 100R SM
R320
100R SM
R322
22R SM
0V_SIG
C317
470N PE
0V_SIG
0V_SIG
INPUT
0V_SIG
R350
5R6 2W CF
C319
100N PE
0V_HF 0V_LS
C313
100N SM
R341
330R SM
R342
330R SM
R343
100R SM
R344
100R SM
R345
0R0 SM
R346
0R0 SM
R334
22K SM
R336
22K SM
D301
BAS16W SM
D302
BAS16W SM
TR312
FMMT497
TR304
FMMT597
TR313
FMMT497
TR302
FMMT597
DZ305
4V7 350MW SM
0V_HF
VIPROT
C320
100U NP
TR305
FMMT597
DZ306
4V7 350MW SM
0V_HF
DCPROT
OUTPUT
0V_LS
0V_HF
VPOS
VNEG
0V_HF
0V_HF
DZ300
15V 350MW SM
DZ301
15V 350MW SM
C309
100N SM
C310
100N SM
C314
100N SM
0V_SIG
0V_SIG
D304
1N4003F
D303
1N4003F
R302
10K SM
R327
22K SM
RV300
100R PSET
C312
10N SM
1
2
PL300
BIAS
R325
1K0 SM
R326
1K0 SM
ADJ BIAS
D300
BAS16W SM
R300
10K SM
R309
10K SM
R305
10K SM
R306
10K SM +C305
10U EL
MEASURE
TR318
SAP15N
TR319
SAP15P
R301
10K SM
C315
100N SM
R347
100R SM
R349
100R SM
R348
100R SM
R340
100K SM
DZ302
4V7 350MW SM
DZ303
4V7 350MW SM
3
21
84
IC300A
TL072CD
5
6
7IC300B
TL072CD
R328
4K7 SM
0V_HF
0V_SIG
TR311
FMMT497
TR303
FMMT597
TR310
FMMT497
TR307
FMMT597
C307
100P SM
C308
100P SM
INPUT FILTER V TO I AMP
DC SERVO
PNP CURRENT MIRROR
NPN CURRENT MIRROR
PRE DRIVER
PRE DRIVER
OUTPUT STAGE
OUTPUT STAGE
V-I PROTECTION
V-I PROTECTION
VI PROTECT
SIGNAL TO MICRO
DC OFFSET
DETECTION
DC OFFSET SIGNAL
TO MICRO
ZOBEL NETWORK
TR316
FMMT497
TR308
FMMT597
TR317
FMMT497
R311
10K SM
R312
10K SM
R313
10K SM
R303
10K SM
R304
10K SM
R307
10K SM
R310
4K7 SM
R329
4K7 SM
+
C300
100U EL
+
C301
100U EL
R338
150R SM
R339
150R SM
R308
22K SM
R314
10K SM
TR309
FMMT497
TR306
FMMT597 R323 22R SM
R321
22R SM
TP302
TP303
TP304
TP307
TP308
TP305
TP306
R337
22R SM
R331
1K5 SM
R332
1K8 SM
R330
1M0 SM
R333
3K3 SM
R335
3K3 SM
L300
2U2H LAC SMALL
R351
10R MF
C316
470P PPW C311
100N PC
+C318
10U EL
TR321
FMMT597
TR320
FMMT497
+C302
100U EL 100V
+C306
100U EL 100V
R352
470R 2W MF 5%
R353
470R 2W MF 5%
BOOTSTRAP
BOOTSTRAP
(SET TO 16mV)
+C303
100U EL
+C304
100U EL
TR322
FMMT497
R354
1K0 SM
R355
6K8 SM
02_E035 JBR 4/2/2002 FUSE VALUES UPRATED TO T4A 4.0
02_E062 JBR 20/3/02 LDO REG FITTED TO IC201 4.1

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DATE
Filename ECO No. DESCRIPTION OF CHANGE
L882C4_4.1.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A85 amplifier - power output stage right
Circuit Diagram
L882C4
J Reckless
20-Mar-2002
INITIALS
Date Printed 4 4Sheet of
Notes:
R424
1K0 SM
TR400
FMMT597 TR401 FMMT597
R415
100R SM R416 100R SM
R419
100R SM
TR414
FMMT497 TR415
FMMT497
R417
100R SM R418 100R SM
R420
100R SM
R422
22R SM
0V_SIG
R430
1M0 SM
R431
1K5 SM
R432
1K8 SM
C417
470N PE
0V_SIG
0V_SIG
INPUT
0V_SIG
R450
5R6 2W CF
C419
100N PE
0V_HF 0V_LS
C413
100N SM
R441
330R SM
R442
330R SM
R443
100R SM
R444
100R SM
R445
0R0 SM
R446
0R0 SM
R434
22K SM
R436
22K SM
D401
BAS16W SM
D402
BAS16W SM
TR412
FMMT497
TR404
FMMT597
TR413
FMMT497
TR402
FMMT597
DZ405
4V7 350MW SM
0V_HF
VIPROT
C420
100U NP
TR405
FMMT597
DZ406
4V7 350MW SM
0V_HF
DCPROT
OUTPUT
0V_LS
0V_HF
VPOS
VNEG
0V_HF
0V_HF
DZ400
15V 350MW SM
DZ401
15V 350MW SM
C409
100N SM
C410
100N SM
C414
100N SM
0V_SIG
0V_SIG
D404
1N4003F
D403
1N4003F
R402
10K SM
R427
22K SM
RV400
100R PSET
C412
10N SM
1
2
PL400
BIAS
R425
1K0 SM
R426
1K0 SM
ADJ BIAS
D400
BAS16W SM
R400
10K SM
R409
10K SM
R405
10K SM
R406
10K SM +C405
10U EL
MEASURE
TR418
SAP15N
TR419
SAP15P
R401
10K SM
C415
100N SM
R447
100R SM
R449
100R SM
R448
100R SM
R440
100K SM
DZ402
4V7 350MW SM
DZ403
4V7 350MW SM
3
21
84
IC400A
TL072CD
5
6
7IC400B
TL072CD
R428
4K7 SM
0V_HF
0V_SIG
TR411
FMMT497
TR403
FMMT597
TR410
FMMT497
TR407
FMMT597
C407
100P SM
C408
100P SM
INPUT FILTER V TO I AMP
DC SERVO
PNP CURRENT MIRROR
NPN CURRENT MIRROR
PRE DRIVER
PRE DRIVER
OUTPUT STAGE
OUTPUT STAGE
V-I PROTECTION
V-I PROTECTION
VI PROTECT
SIGNAL TO MICRO
DC OFFSET
DETECTION
DC OFFSET SIGNAL
TO MICRO
ZOBEL NETWORK
TR416
FMMT497
TR408
FMMT597
TR417
FMMT497
R411
10K SM
R412
10K SM
R413
10K SM
R403
10K SM
R404
10K SM
R407
10K SM
R410
4K7 SM
R429
4K7 SM
+
C400
100U EL
+
C401
100U EL
R438
150R SM
R439
150R SM
R408
22K SM
R414
10K SM
TR409
FMMT497
TR406
FMMT597 R423 22R SM
R421
22R SM
(SET TO 16 mV)
TP402
TP403
TP404
TP405
TP406
TP407
TP408
R437
22R SM
R433
3K3 SM
R435
3K3 SM
R451
10R MF
C416
470P PPW C411
100N PC
+C418
10U EL
TR421
FMMT597
TR420
FMMT497
+C402
100U EL 100V
+C406
100U EL 100V
R452
470R 2W MF 5%
R453
470R 2W MF 5%
BOOTSTRAP
BOOTSTRAP
+C403
100U EL
+C404
100U EL
L400
2U2H LAC SMALL
TR422
FMMT497
R454
1K0 SM
R455
6K8 SM
02_E035 JBR 4/2/2002 FUSE VALUES UPRATED TO T4A 4.0
02_E062 JBR 20/3/02 LDO REG FITTED TO IC201 4.1

12345678
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J:\Released_Documents\Native_format_files\Protel_DDB\L928_B.3.Ddb - Documents\L928CT_1_B.3.PRJ
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A32 FMJ AMP DISPLAY PCB
Circuit Diagram
L928CT1
CL
10-Oct-2001
INITIALS
Date Printed 1 2Sheet of
Notes:
L928CT_B.1
L928CT_2_B.3.SCH
FD_1
FIDUCIAL
FD_2
FIDUCIAL
A32 FMJDISPLAY PCB
MICRO
PCB
PCB1
L928PB_B
CHASSIS 1
CHASSIS 2
CHASSIS 3
(BY SK3)
(BY SK1)
(BY SK2)
C39
1N0 SM
C45
1N0 SM
C40
1N0 SM C41 1N0 SM C43 1N0 SM C44 1N0 SM
C46
1N0 SM C47 1N0 SM C49
1N0 SM
C48
1N0 SM
0V_D
0V_D 0V_D 0V_D 0V_D
0V_D0V_D
0V_D0V_D
0V_D
CL INITIAL PROTOTYPE25/04/01 A.0
FIX2
FIXING HOLE 3.5
FIX7
FIXING HOLE 3.5 FIX10 FIXING HOLE 3.5 FIX5 FIXING HOLE 3.5
FIX11
FIXING HOLE 3.5
FIX13
FIXING HOLE 3.5
FIX3
FIXING HOLE 3.5
FIX8
FIXING HOLE 3.5
FIX1
FIXING HOLE 3.5
FIX6
FIXING HOLE 3.5
FIX9
FIXING HOLE 3.2 FIX12 FIXING HOLE 3.2
C38
1N0 SM
C37
1N0 SM
0V_D
0V_D
WAF 9/08/01 UPDATED PROTOTYPE B.0
JBR 10/9/01 PRE PRODUCTION RELEASE B.2
WAF 26/9/01 STICKY PADS RENUMBERED B.3

1 2 3 4 5 6 7 8
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Filename ECO No. DESCRIPTION OF CHANGE
J:\Released_Documents\Native_format_files\Protel_DDB\L928_B.3.Ddb - Documents\L928CT_2_B.3.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
A32 FMJ AMP DISPLAY PCB
Circuit Diagram
L928CT2
CL
10-Oct-2001
INITIALS
Date Printed 2 2Sheet of
Notes:
Vcc
1
PB0
2
PB1
3
PB2
4
PB3
5
PB4
6
PB5
7
PB6
8
PB7
9
Vpp/RESO
10
Vss
11
TxD0/P9.0
12
TxD1/P9.1
13
RxD0/P9.2
14
RxD1/P9.3
15
IRQ4/SCK0/P9.4
16
IRQ5/SCK1/P9.5
17
D0/P4.0
18
D1/P4.1
19
D2/P4.2
20
D3/P4.3
21
Vss
22
D4/P4.4
23
D5/P4.5
24
D6/P4.6
25
D7/P4.7
26
D8/P3.0
27
D9/P3.1
28
D10/P3.2
29
D11/P3.3
30
D12/P3.4
31
D13/P3.5
32
D14/P3.6
33
D15/P3.7
34
Vcc
35
A0/P1.0
36
A1/P1.1
37
A2/P1.2
38
A3/P1.3
39
A4/P1.4
40
A5/P1.5
41
A6/P1.6
42
A7/P1.7
43
Vss
44
A8/P2.0
45
A9/P2.1
46
A10/P2.2
47
A11/P2.3
48
A12/P2.4
49
A13/P2.5
50
P2.6/A14 51
P2.7/A15 52
P5.0/A16 53
P5.1/A17 54
P5.2/A18 55
P5.3/A19 56
Vss 57
P6.0/WAIT 58
P6.1/BREQ 59
P6.2/BACK 60
CLKOUT 61
STBY 62
RES 63
NM1 64
Vss 65
EXTAL 66
XTAL 67
Vcc 68
P6.3/AS 69
P6.4/RD 70
P6.5/HWR 71
P6.6/LWR 72
MD0 73
MD1 74
MD2 75
AVcc 76
Vref 77
P7.0/AN0 78 P7.1/AN1 79 P7.2/AN2 80 P7.3/AN3 81 P7.4/AN4 82 P7.5/AN5 83
P7.6/AN6/DA0 84 P7.7/AN7/DA1 85
AVss 86
P8.0/IRQ0 87 P8.1/IRQ1 88 P8.2/IRQ2 89 P8.3/IRQ3 90
P8.4/CS0 91
Vss 92
PA0 93 PA1 94 PA2 95 PA3 96 PA4 97 PA5 98 PA6 99 PA7 100
H8/3048F
IC1
H8/3048F
Gnd
1
Res
2Vcc
3
DS1233
Gnd
4
IC2
DS1233 SM
R1
10K SM R2 10K SM R3 10K SM R4 10K SM R5 10K SM R6 10K SM R7 10K SM R8 10K SM R9 10K SM R10 10K SM R11 10K SM R12 10K SM R13 10K SM R14 10K SM R15 10K SM R16 10K SM
0V_D
R17
330R SM R18 330R SM R19 330R SM R21 330R SM R22 330R SM R25 330R SM
BUT11 BUT2 BUT3 BUT4 BUT13 BUT6 BUT7 BUT8 BUT9 BUT12 BUT14 BUT1 BUT10 BUT5 BUT15 BUT16
0V_D
C1
18P SM
C2
18P SM
Programming adaptor
+5V
0V_D
+5V
+5V
D2
BAS16W SM
+5V
R26
10K SM
+5V
IND10 IND2 IND8 IND1 IND5 IND6 IND9 IND4 IND3 IND7
0V_D
+5V
R27
10K SM
R2810K SM
R34
150R SM
R33
330R SM
0V_D
+5V
0V_D
+5V
To preamp board
SEL1
SEL2
SEL3
SEL4
SEL5
SEL6
SEL7
SEL8
SEL9
LEFTAUDIO
MUTE
TONE
TONEID
SDATA
SLOAD
SCLK
0V_D
PHASEA
PHASEB
+5V
PHASEA PHASEB
+5V
0V_D
A0
1A1 2A2 3
VSS
4
SDA 5
SCL 6
WP 7
VDD 8
IC5
24C02 SM
0V_D
R32
10K SM
+5V
DISPCLK
DISPDAT
DISPDAT DISPCLK
0V_D
F1 to F2 = 4Vac 150mA
VDD2 = 40Vdc 20mA
+5V
DISPLAT DISPBLK
3
2
1
IC6A
LM393A SM
5
67
IC6B
LM393A SM
84
IC6C
LM393A SM
C3
100N SM
C4
100N SM
0V_D
0V_D
C5
100N SM
0V_D
DISPBLK
DISPLAT BUT9
BUT8
BUT7
BUT6
BUT2
IND3
BUT3 BUT1 IND1 BUT5 IND2 BUT4 IND12 IND11 BUT16 IND6 BUT15 IND5 BUT10 IND7 BUT12 IND9 BUT14 IND4 BUT11 IND8 BUT13
C6
100N SM
C7
100N SM
C8
100N SM
C9
100N SM
C10
100N SM
0V_D
+5V
R35
10K SM
R36
10K SM
R37
10K SM
R38
1K2 SM
R39
2K2 SM
R40
4K7 SM
+5V
+5V
+5V
0V_D
0V_D
+
C11
10U EL SM
R41
100K SM
R42
100K SM
0V_D
+5V
R43
100K SM
R44
100K SM
3
21
IC7A
LM393A SM
5
67
IC7B
LM393A SM
84
IC7C
LM393A SM
0V52V7
2V7
0V5
3
21
IC8A
LM393A SM
5
6
7
IC8B
LM393A SM
84
IC8C
LM393A SM
R45
10K SM
R46
1K2 SM
R47
4K7 SM
0V5
2V7
+5V
+5V
0V_D
0V_D
R480R0 SM
SCLK
SLOAD
SDATA
TONEID
SEL1
SEL2
SEL3
SEL4
SEL5
SEL6
SEL7
SEL8 SEL9 MUTE TONE
+C14
10U EL SM
C15
100N SM
0V_D
C16
100N SM
1
2
3
4
5
SK2
AMPCT5
SAMTX2
SAMRX2
SAMRX2
SAMTX2
SAMBUSY
SAMDATA
+5V
0V_D
IND10
C17
100N SM
0V_D
D3
BAS16W SM
R55
10K SM
+5V
PR_TXD
PR_GND
PR_RESET
PR_MD
PR_PMODE
PR_VPP
PR_RXD
PR_VCC
VFD_VDD2
3
21
IC11A
AD8532 SM
5
67
IC11B
AD8532 SM
84
IC11C
AD8532 SM C25
100N SM
DCPROT VIPROT F1CLOCK F2CLOCK
STANDBY
SP1ON
SP2ON
THERMPROT
+5V
0V_D
F1CLOCK
F2CLOCK
+SUP VFD_VDD2
+
C28
10U EL SM
0V_D
R56
10K SM
R57
10K SM
Q_1
Q_2
Q_3
Q_4
Q_5
Q_6
Q_7
Q_8
Q_9
Q_10
Q_11
Q_12
Q_14
Q_15
Q_16
Q_17
Q_19
Q_20
Q_21 Q_22
Q_23
R58
0R0 SM
R59
0R0 SM
R64
100R SM
R65
100R SM R66
100R SM
R67
100R SM
C31
10P SM C32 10P SM
0V_D
R49
10K SM
R50
10K SM
+5V
Q_34
SAMHOLD
SAMHOLD
R51
100R SM
Q_35
Q_37
Q_38
Q_39
Q_40 Q_41
Q_42
Q_43
Q_44
Q_45
Q_46
Q_47 Q_48
Q_49
Q_50
Q_51
Q_52
Q_53 Q_54
Q_55
Q_56
Q_57
Q_58
Q_59
Q_64
Q_65 Q_66 Q_67 Q_68 Q_69 Q_70 Q_71 Q_72 Q_73 Q_74
Q_75
Q_78
Q_79 Q_80
Q_81
Q_82
Q_83 Q_84 Q_85
Q_86
Q_87
Q_88
Q_89
Q_90
Q_91
Q_92 Q_93 Q_94 Q_95 Q_96 Q_97
Q_98
Q_99
Q_100 Q_101 Q_102 Q_103 Q_104 Q_105 Q_106 Q_107 Q_108 Q_109 Q_110 Q_111 Q_112 Q_113 Q_114
Q_115
Q_116
R20
330R SM R23 330R SM
R24
330R SM R31 330R SM
R G
LED11
LED RED/GRN 3MM
Q1
BC847B Q2 BC847B
R29
10K SM R30
10K SM
0V_D
IND11 IND12
R68
10K SM
BUT17
BUT17
0V_D
+5V
+SUP
STANDBY
SP1ON
SP2ON
THERMPROT
VIPROT
DCPROT
ACPRESENT
ACPRESENT
0V_D
R69
2R2 SM
R70
2R2 SM
R71
2R2 SM
R72
2R2 SM
0V_D
IRIN
Q3
BC847B
Q4
BC847B
R73
10K SM
R74
10K SM
R75
10K SM
R76
10K SM
0V_D
+5V
IRIN
IRIN
IROUT
C12
100N SM
(FIT CLOSE TO SK1)
+5V
0V_D
+C33
220U EL +C34 220U EL
SAMDATA
SAMBUSY
IRIN
C3
B2
A1
4 5
SW18
ALPS_ENCODER
LED7
LED GREEN
LED8
LED GREEN
LED6
LED GREEN
LED3
LED GREEN
LED10
LED GREEN
LED9
LED GREEN
LED1
LED GREEN
LED4
LED GREEN
LED2
LED GREEN
LED5
LED GREEN
RECEIVE
TRANSMIT
TRANSMIT
TRANSMIT
RECEIVE
RECEIVE
RESPIN
RESPIN
PB0
PB0
VPROG
VPROG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SK1
FFC 14W 2.54MM HOR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SK3
FFC 22W 1MM HOR
To power amp / PSU
0V_D
C50A 100PX4 SM
C50B 100PX4 SM
C50C 100PX4 SM
C50D 100PX4 SM
C51A 100PX4 SM
C51B 100PX4 SM
C51C 100PX4 SM
C51D 100PX4 SM
C52A 100PX4 SM
C52B 100PX4 SM
C52C 100PX4 SM
C52D 100PX4 SM
C53A 100PX4 SM
C53B 100PX4 SM
C53C 100PX4 SM
C53D 100PX4 SM
C54A 100PX4 SM
C54B 100PX4 SM
C54C 100PX4 SM
C54D 100PX4 SM
C55A 100PX4 SM
C55B 100PX4 SM
CHASSIS 1
C60D 100PX4 SM
C60C 100PX4 SM
C60B 100PX4 SM
C60A 100PX4 SM
C61D 100PX4 SM
C61C 100PX4 SM
C61B 100PX4 SM
C61A 100PX4 SM
C62D 100PX4 SM
C62C 100PX4 SM
C62B 100PX4 SM
C62A 100PX4 SM
C63D 100PX4 SM
C63C 100PX4 SM
CHASSIS 2
+C29
100U EL SM
R52
100R SM
R53
100R SM
LEFTAUDIO
+
C26
10U EL SM
C55C 100PX4 SM
C55D 100PX4 SM
C63B 100PX4 SM
C63A 100PX4 SM
X1
16MHZ SM
F1
1
F1
2
F1
3
SIN
4
VDD1
5
SOUT
6
LAT
7
BLK
8
CLK
9
VSS
10
VSS
11
VDD2
12
F2
15
F2
16
F2
17
Graphics Display
DISP1
B1013
12 34 56 78 910 1112 1314
SK4
HEADER 7X2HORIZ
STICKY PAD
DOUBLE SIDED
10 X 15MM
SP101
STICKY PAD DS 10X15MM
STICKY PAD
DOUBLE SIDED
10 X 15MM
SP102
STICKY PAD DS 10X15MM
Q_122
Q_123
Q_124
Q_125
Q_126
Q_127
Q_128
Q_129
Q_120
Q_119
Q_118
Q_117
Q_121
CL 25/04/01 INITIAL PROTOTYPE A.0
+5V 3
O/P
2
GND
1
Case Case
O/P
GND +5V
RX1
SBX1610-52/PIC-26043TM2
Q5
BD179 NPN TO-126
R54
3K3 MF
DISPLAY CRADLE
E916PM
DC1
DISPLAY CRADLE E916PM
DISPLAY CRADLE
E916PM
DC2
DISPLAY CRADLE E916PM
SW6
TACTSW A1505 SW12 TACTSW A1505 SW11 TACTSW A1505 SW8 TACTSW A1505 SW7 TACTSW A1505 SW13 TACTSW A1505 SW14 TACTSW A1505 SW15 TACTSW A1505 SW16 TACTSW A1505
SW17
TACTSW A1505 SW1 TACTSW A1505 SW2 TACTSW A1505 SW3 TACTSW A1505
SW4
TACTSW A1505 SW5 TACTSW A1505 SW9 TACTSW A1505
SW10
TACTSW A1505
POWER SP1SP2TONE DOWN UP ENTERMODE RECORD SELECT
C13
100N SM
AV DVD CD TUNER VCR PHONO/ AUX TAPE
IR RX
SUPPORT PAD
SP
IR RX SUPPORT PAD
LED
SPACER
SP1
SPACER F195
LED
SPACER
SP2
SPACER F195
LED
SPACER
SP3
SPACER F195
LED
SPACER
SP4
SPACER F195
LED
SPACER
SP5
SPACER F195
LED
SPACER
SP6
SPACER F195
LED
SPACER
SP7
SPACER F195
LED
SPACER
SP8
SPACER F195
LED
SPACER
SP9
SPACER F195
LED
SPACER
SP10
SPACER F195
WAF 9/08/01 UPDATED PROTOTYPE B.0
IR RX
SUPPORT PAD
SP103
IR RX SUPPORT PAD
PLACE ONE ON TOP OF
THE OTHER UNDER RX1
D1
ZENER 400MW 33V
JBR 10/9/01 PRE PRODUCTION RELEASE B.2
WAF 26/9/01 STICKY PADS RENUMBERED B.3

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J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C1_1.0.PRJ
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Integrated amplifier preamp
Circuit Diagram
L937C1
JBR
28-Nov-2001
INITIALS
Date Printed 1 3Sheet of
Notes:
Main signal path
L937C2_1.1.SCH Power supply L937C3_1.1.SCH
USE EXCLUDE NF WHEN USING RUNOUT SHEET PROGRAM
PCB
PCB1
L937PB_1 01_1142 JBR 14/8/01 First production release 1.0
01_E014 JBR 28/11/01 Fuses uprated to 2A 1.1

1 2 3 4 5 6 7 8
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Filename ECO No. DESCRIPTION OF CHANGE
J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C2_1.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Integrated amplifier preamp - main signal path
Circuit Diagram
L937C2
JBR28-Nov-2001
INITIALS
Date Printed 2 3Sheet of
Notes:
EMC
1
N
F
SK2A
PHONO4G
C100
1N0 SM
0V_SIG
0V_SIG
R100
1K0 SM
R101
1K0 SM
R103
100K SM
R104
100K SM
D100
BAV99W DUAL SM
+15V -15V
0V_SIG
0V_SIG
D101
BAV99W DUAL SM
+15V -15V
N
F
SK2B
PHONO4G
0V_SIG
R102
1K0 SM
R125
1K0 SM
R105
100K SM
R128
100K SM
D102
BAV99W DUAL SM
+15V -15V
0V_SIG
0V_SIG
D106
BAV99W DUAL SM
+15V -15V
EMC
1
N
F
SK3A
PHONO4G
C121
1N0 SM
0V_SIG
0V_SIG
R126
1K0 SM
R127
1K0 SM
R129
100K SM
R130
100K SM
D107
BAV99W DUAL SM
+15V -15V
0V_SIG
0V_SIG
D108
BAV99W DUAL SM
+15V -15V
N
F
SK3B
PHONO4G
0V_SIG
R156
1K0 SM
R157
1K0 SM
R159
100K SM
R160
100K SM
D112
BAV99W DUAL SM
+15V -15V
0V_SIG
0V_SIG
D113
BAV99W DUAL SM
+15V -15V
EMC
1
N
F
SK4A
PHONO4G
C139
1N0 SM
0V_SIG
0V_SIG
R158
1K0 SM
R189
1K0 SM
R161
100K SM
R192
100K SM
D114
BAV99W DUAL SM
+15V -15V
0V_SIG
0V_SIG
D115
BAV99W DUAL SM
+15V -15V
EMC
1
N
F
SK5A
PHONO4G
0V_SIG
R190
1K0 SM
R191
1K0 SM
R193
100K SM
R194
100K SM
D116
BAV99W DUAL SM
+15V -15V
0V_SIG
0V_SIG
D117
BAV99W DUAL SM
+15V -15V
CD INPUT
TUNER INPUT
AV INPUT
DVD INPUT
TAPE INPUT
VCR INPUT
C160
1N0 SM
0V_SIG
C164
1N0 SM
0V_SIG
0V_SIG
R195
1K0 SM
R196
1K0 SM
R197
100K SM
R198
100K SM
D118
BAV99W DUAL SM
+15V -15V
0V_SIG
0V_SIG
D119
BAV99W DUAL SM
+15V -15V
EMC
1
N
F
SK6
PHONO2G
AUX INPUT
CD L
CD R
TUNER L
TUNER R
AV L
AV R
DVD L
DVD R
TAPE IN L
TAPE IN R
VCR IN L
VCR IN R
AUX L
AUX R
AUX L
CD L
TUNER L
AV L
DVD L
VCR IN L
MODULE L
0V_SIG
AUX R
CD R
TUNER R
AV R
DVD R
VCR IN R
MODULE R
0V_SIG
TAPE 0
TAPE 1
TAPE 2
TAPE 0
TAPE 1
TAPE 2
+15V
+15V-15V
-15V
0V_SIG
0V_SIG
C104
100N SM
C105
100N SM
+15V
-15V
3
21
Z109A
TL072 SM
84
Z113C
TL072 SM
R106
1M0 SM
0V_SIG
R108
47R SM
D103
BAV99W DUAL SM
+15V -15V
N
F
SK4B
PHONO4G
0V_SIG
5
67
Z109B
TL072 SM
R107
1M0 SM
0V_SIG
R109
47R SM
D104
BAV99W DUAL SM
+15V -15V
3
21
Z110A
TL072 SM
R131
1M0 SM
0V_SIG
R133
47R SM
D109
BAV99W DUAL SM
+15V -15V
5
67
Z110B
TL072 SM
R132
1M0 SM
0V_SIG
R134
47R SM
D110
BAV99W DUAL SM
+15V -15V
N
F
SK5B
PHONO4G
0V_SIG
+15V
+15V-15V
-15V
-15V
-15V
C108
100P SM
C109
100P SM
C129
100P SM
C130
100P SM
AUX L
CD L
TUNER L
AV L
DVD L
TAPE IN L
MODULE L
0V_SIG
AUX R
CD R
TUNER R
AV R
DVD R
TAPE IN R
MODULE R
VCR 0
VCR 1
VCR 2
VCR 0
VCR 1
VCR 2
0V_SIG
0V_SIG
0V_SIG
TAPE OUTPUT
VCR OUTPUT
C106
100N SM
C107
100N SM
+15V
-15V
0V_SIG
C125
100N SM
C126
100N SM
+15V
-15V
0V_SIG
C127
100N SM
C128
100N SM
+15V
-15V
0V_SIG
AUX L
CD L
TUNER L
AV L
DVD L
TAPE IN L
VCR IN L
MODULE L
AUX R
CD R
TUNER R
AV R
DVD R
TAPE IN R
VCR IN R
MODULE R
LISTEN 0
LISTEN 1
LISTEN 2
LISTEN 0
LISTEN 1
LISTEN 2
0V_SIG
0V_SIG
C143
100N SM
C144
100N SM
+15V
-15V
0V_SIG
C145
100N SM
C146
100N SM
+15V
-15V
0V_SIG
84
Z114C
TL072 SM
R170
22K SM
R162
22K SM R171
22K SM
R163
22K SM R172
22K SM
R164
22K SM R173
22K SM
R165
22K SM
R174
22K SM
R166
22K SM R175
22K SM
R167
22K SM R176
22K SM
R168
22K SM R177
22K SM
R169
22K SM
+15V
+15V R178
22K SM
C148
22P SM
R179
22K SM
C149
22P SM
5
6
7Z115B
OPA2134PA SM
5
6
7Z116B
OPA2134PA SM
84
Z116C
OPA2134PA SM
0V_SIG
0V_SIG
R183
1M0 SM
R184
1M0 SM
R199
100K SM
R180
100K SM
0V_SIG
0V_SIG
+5V
+5V
+5V
+5V
+5V
+5V
X0
4X1
5X2
6X3
7X4
12 X5
11 X6
10
X7
9
EN
2A0
1A1
16 A2
15
V-
3
D8
GND
14
V+ 13
Z100
DG408DY
X0
4X1
5X2
6X3
7X4
12
X5
11 X6
10 X7
9
EN
2A0
1A1
16 A2
15
V-
3
D8
GND
14
V+ 13
Z101
DG408DY
X0
4X1
5X2
6
X3
7X4
12 X5
11 X6
10 X7
9
EN
2A0
1A1
16 A2
15
V-
3
D8
GND
14
V+ 13
Z102
DG408DY
X0
4
X1
5X2
6X3
7X4
12 X5
11 X6
10 X7
9
EN
2A0
1A1
16 A2
15
V-
3
D8
GND
14
V+ 13
Z103
DG408DY
X0
4X1
5X2
6X3
7X4
12 X5
11 X6
10 X7
9
EN
2A0
1A1
16
A2
15
V-
3
D8
GND
14
V+ 13
Z104
DG408DY
X0
4X1
5X2
6X3
7X4
12 X5
11 X6
10 X7
9
EN
2
A0
1A1
16 A2
15
V-
3
D8
GND
14
V+ 13
Z105
DG408DY
LIN
4
LGND
5
RGND
12
RIN
13
LMO 2
RMO 15
AVCC 1
DVCC 7
LFO 3
RFO 14
DGND
11
XCS
6DATA 9CCLK
10
XMUTE
8
AGND
16
Z107
VSDVC
0V_SIG
C186
100N SM
+5V
+C154
10U EL C155
100N SM C156
100N SM
0V_SIG 0V_SIG
+5V
SCLK SDATA SLOAD
0V_SIG
0V_SIG
R200
2R2 SM
R201
2R2 SM
R202
2R2 SM
0V_SCLK
0V_SLOAD
0V_SDATA
C158
22P SM
C159
22P SM
0V_SIG
0V_SIG
SEL1
1
S2 14
D1
2
V+ 13
S1
3
S3 11
V-
4
GND
5VL 12
S4
6
D3 10 D4
7
SEL3 9
D2 15
SEL4
8
SEL2 16
Z106
DG413DY
+15V-15V
0V_SIG
+5V
TONE*
TONE*
TONE*
TONE*
C152
100N SM
0V_SIG
C153
100N SM
R186
47R SM
R187
47R SM
R185
22R SM +C157
100U EL
R110
2K2 SM
R111
2K2 SM
+C110
100U EL
R112
22K SM
0V_SIG
R113
22K SM
+C111
10U CERAFINE
+5V
3
21
Z111A
TL072 SM
5
67
Z112B
TL072 SM
3
21
Z112A
TL072 SM
5
6
7
Z111B
TL072 SM
84
Z109C
TL072 SM
84
Z110C
TL072 SM
+
C117
10U CERAFINE
R121
22K SM
R119
22K SM
R120
22K SM
+C116
10U CERAFINE
0V_SIG
D105
BAV99W DUAL SM
0V_SIG
R114
22K SM
R118
22K SM
1618
17
Z108D
DS1844
1519
14
Z108A
DS1844
R115
2K7 SM
R116
2K7 SM
0V_SIG
R117
5K6 SM
R135
2K2 SM
R136
2K2 SM
+C131
100U EL
R137
22K SM
0V_SIG
R138
22K SM
+C132
10U CERAFINE
+5V
3
21
Z113A
TL072 SM
5
67
Z114B
TL072 SM
3
21
Z114A
TL072 SM
5
6
7
Z113B
TL072 SM
+
C138
10U CERAFINE
R146
22K SM
R144
22K SM
R145
22K SM
+C137
10U CERAFINE
0V_SIG
D111
BAV99W DUAL SM
0V_SIG
R139
22K SM
R143
22K SM
62
7
Z108B
DS1844
53
4
Z108C
DS1844
R140
2K7 SM
R141
2K7 SM
0V_SIG
R142
5K6 SM
84
Z111C
TL072 SM
84
Z112C
TL072 SM
+15V
+15V
-15V
-15V
C169
100N SM
C168
100N SM C172 100N SM
C173
100N SM
C176
100N SM
C177
100N SM
C180
100N SM
C181
100N SM
0V_SIG 0V_SIG 0V_SIG 0V_SIG
C170
100N SM
C171
100N SM
C174
100N SM
C175
100N SM
C178
100N SM
C179
100N SM
C182
100N SM
C183
100N SM
C184
100N SM
C185
100N SM
0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG
PS 1
R/W 8
DOUT 11 RST
9DIN
12 CLK
13
VCC 20
GND
10
Z108E
IC DS1844
+5V
SDATA
SCLK
TONEID
C118
100N SM
+C120
10U EL
0V_SIG
C119
10N SM
R122
2R2 SM
0V_TONEID
C115
22P SM
C136
22P SM
0V_SDATA
0V_SCLK
R124
2R2 SM
R123
2R2 SM
R151
22K SM
R147
22K SM R152
22K SM
R148
22K SM R153
22K SM
R149
22K SM R154
22K SM
R150
22K SM R155
22K SM
LISTEN 0
LISTEN 1
LISTEN 2
VCR 0
VCR 1
VCR 2
TAPE 0
TAPE 1
TAPE 2
TONE*
0V_TONEID
TONEID
0V_SDATA
SDATA
0V_SLOAD
SLOAD
0V_SCLK
SCLK
1
2
3
4
SK102
AMPCT4
0V_SIG
1
2
3
4
5
6
7
8
SK103
AMPCT8
+15V
0V_SIG
-15V
AUX R
AUX L
TO PHONO PCB
TO POWER AMP I/P
TO MICRO / DISPLAY PCB
3
21
Z115A
OPA2134PA SM
3
21
Z116A
OPA2134PA SM
3
21
Z117A
OPA2134PA SM
5
67
Z117B
OPA2134PA SM
84
Z115C
OPA2134PA SM
84
Z117C
OPA2134PA SM
RLY100A
RLY DPDT 5V SM
RLY100B
RLY DPDT 5V SM
+
-
RLY100C
RLY DPDT 5V SM
D120
BAS16W SM
Q100
BC849B R203
4K7 SM MUTE*
0V_D
+5V
MUTE*
0V_D
+C187
10U EL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
SK101
FFC30V SM
0V_MODULE
AUX L
AUX R
CD L
CD R
TUNER L
TUNER R
AV L
AV R
DVD L
DVD R
TAPE IN L
TAPE IN R
VCR IN L
VCR IN R
MODULE L
MODULE R
TO PLUG IN MODULE PCB
+5V
R188
10K SM
0V_SIG
0V_HF
D121
BAV99W DUAL SM
D122
BAV99W DUAL SM
+15V -15V
C113
470N PE
C134
470N PE
C150
470N PE
C151
470N PE
+C188
10U EL
+C189
10U EL
+15V
-15V
0V_SIG
+C190
10U EL
+C191
10U EL
+15V
-15V
0V_SIG
R204
10K SM
C112
470N PE
C192
470N PE
C133
470N PE
C193
470N PE
C101
470P FKP2
C102
470P FKP2
C103
470P FKP2
C122
470P FKP2
C123
470P FKP2
C124
470P FKP2
C140
470P FKP2
C141
470P FKP2
C142
470P FKP2
C161
470P FKP2
C162
470P FKP2
C163
470P FKP2
C165
470P FKP2
C166
470P FKP2
C114
CFKP2 63V 2N2
C135
CFKP2 63V 2N2
CDL1 CDL
CDR
CDR1
TUNL1
TUNR1
TUNL
TUNR
AVL1
AVR1
AVL
AVR
DVDL1
DVDR1
DVDL
DVDR
TAPEIL1
TAPEIR1
TAPEIL
TAPEIR
VCRIL1
VCRIR1
VCRIL
VCRIR
AUXL
AUXR
+15V1
-15V1
AUXL1
AUXR1
LISTEN2
LISTEN1
LISTEN0
LIST2
LIST1
LIST0
VCR2
VCR1
VCR0
VCR21
VCR11
VCR01
TAPE2
TAPE1
TAPE0
TAP2
TAP1
TAP0
TAPEO1
TAPE02
VCRO1
VCR02
Z115_1A
Z116_1A
/TONE
Z107_4
Z107_13
Z107_1
SK102_1
SK102_3
Z116_1B
Z113_3
Z111_3
Z115_1B
Z111_1
Z111_7
Z108_19
Z112_3 Z112_1 Z112_7
TONEID
SDATA
SCLK
Z106_11Z114_7
Z114_1
Z114_3
Z108_3
Z113_7
Z113_1
AUXIL1
AUXIR1
Z106_14
+15V2
-15V2
R182
100R SM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SK100
FFC22V1MM
C147
100N PE
C167
100N PE
01_1142 JBR 14/8/01 First production release 1.0
R181
10K SM
01_E014 JBR 28/11/01 Fuses uprated to 2A 1.1

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Filename ECO No. DESCRIPTION OF CHANGE
J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C3_1.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Integrated amplifier preamp - power supply
Circuit Diagram
L937C3
JBR
28-Nov-2001
INITIALS
Date Printed 3 3Sheet of
Notes:
1 2
3 4
SK300
MOLEXPWR4
+C300
1000u 35V
+C310
1000u 35V
D302
BAS16W SM
D308
BAS16W SM
Vin
I
ADJ
A
Vout O
Z301
LM317T
D305
BAS16W SM
D304
BAS16W SM
R303
470R SM
+C305
10U EL
C304
100N SM R302
1K2 SM
R307
220R SM
+15V
-15V
+5V
0V_PSU
SP300
STAR POINT 4 0V_PSU
0V_SIG
0V_HF 0V_MODULE
+C306
470U EL 25V
C307
470N PE C308 100N SM
C309
100N SM
Q301
2SC5248
Q305
2SA1964
+C302
220U EL
+C312
220U EL
Q300
J112
Q303
J112
R300
330R SM
R304
330R SM
+C303
3300u 25V
+C313
3300u 25V
D310
15V 350MW SM
D311
15V 350MW SM
Q306
BC846B
Q307
BC856B
1
2
3
4
SK301
IDC4S
+15V
-15V
0V_PSU
0V_MODULE
AC1
AC2
UR+
UR-
D311-
D310+
+15V3 +5V
+3.75V
0V_SIG
-15V3
C314
1N0 PP
C315
1N0 PP
D300
S1D D301 S1D
D306
S1D D307 S1D
01_1142 JBR 14/8/01 First production release 1.0
01_E014 JBR 28/11/01 Fuses uprated to 2A 1.1
F300
T2A SM
F301
T2A SM

12345678
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Filename ECO No. DESCRIPTION OF CHANGE
J:\ECO_wip\01_1101 A85 RANGE PCB FUSES AND DC OFFSET\L911_1.1.DDB - Documents\L911C1_1.1.PRJ
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
AP85 third channel - top level
Circuit Diagram
L911C1
J Reckless
4-Jun-2001
INITIALS
Date Printed 1 2Sheet of
Notes:
+1
~2
-
4
~
3
BR100
BRGBU8D
0V_PSU
+49V
-49V
TH100
PTH90DEG
+5V_D
0V_D
1011
IC100E
74HC14D
5 6
IC100C
74HC14D
89
IC100D
74HC14D
14
7
IC100G
74HC14D C100
100N SM C101 100N SM
R100
1K0 SM
POWER AMP SUPPLY
TP100
TP101
+C106
10,000u 63V
+C107
10,000u 63V
C108
100N PC
C109
100N PC
D100
1N4003F D101
1N4003F
SPKR1 ON
SPKR2 ON
TR100
BD179
TR101
BD179 R105
100R SM
R106
100R SM
R103
220R SM R104 220R SM
Top+
Top-
SK102A Bot+
Bot-
SK102B
INPUT
0V_SIG VIPROT DCPROT
OUTPUT0V_LS
0V_HF
VPOS
VNEG
L911C2_1
L911C2_1.1.SCH
EMC
1
N
F
SK101
PHONO2G
C105
1N0 SM
0V_SIG
+49V
-49V
0V_HF
0V_LS
0V_LS
RLY101A
RLY SPST SPKR
RLY101B
RLY SPST SPKR
RLY100A
RLY SPST SPKR
RLY100B
RLY SPST SPKR
0V_D
1 2
IC100A
74HC14D
3 4
IC100B
74HC14D
C103
10N SM
C104
10N SM
R101
1K0 SM
R102
1K0 SM
1 2
3 4
SK103
MOLEXPWR4
THERMPROT
VIPROT1
DCPROT1
+49V
0V_D
1213 IC100F
74HC14D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SK100
FFC 14W 2.54MM VER
+5V_D
0V_D
SPKR1 ON
SPKR2 ON
THERMPROT
VIPROT1
DCPROT1
0V_D
+5V_D
+C102
100U EL SP100
STAR POINT 8
0V_PSU
0V_SIG
0V_LS 0V_HF
0V_D
PIN 1 TO THE LEFT AS YOU LOOK FROM THE FRONT
R107
2R2 SM
TP102
TP103
TP104
TP105
TP106
TP107
TP108
TP109
TP110
TP114
TP115
TP111 TP112 TP113
TP116
JR 30/1/01 PRODUCTION ISSUE 1.0
PCB
PB
L911PB_1
01_1018
01_1101 JR 4/6/01 DC OFFSET CHANGES 1.1

1 2 3 4 5 6 7 8
A
B
C
D
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Filename ECO No. DESCRIPTION OF CHANGE
L911C2_1.1.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
AP85 third channel - output stage
Circuit Diagram
L911C2
J Reckless4-Jun-2001
INITIALS
Date Printed 2 2Sheet of
Notes:
R324
1K0 SM
TR300
FMMT597 TR301 FMMT597
R315
100R SM R316 100R SM
R319
100R SM
TR314
FMMT497 TR315
FMMT497
R317
100R SM R318 100R SM
R320
100R SM
R322
22R SM
0V_SIG
C317
470N PE
0V_SIG
0V_SIG
INPUT
0V_SIG
R350
5R6 2W CF
C319
100N PE
0V_HF 0V_LS
C313
100N SM
R341
330R SM
R342
330R SM
R343
100R SM
R344
100R SM
R345
0R0 SM
R346
0R0 SM
R334
22K SM
R336
22K SM
D301
BAS16W SM
D302
BAS16W SM
TR312
FMMT497
TR304
FMMT597
TR313
FMMT497
TR302
FMMT597
DZ305
4V7 350MW SM
0V_HF
VIPROT
C320
100U NP
TR305
FMMT597
DZ306
4V7 350MW SM
0V_HF
DCPROT
OUTPUT
0V_LS
0V_HF
VPOS
VNEG
0V_HF
0V_HF
DZ300
15V 350MW SM
DZ301
15V 350MW SM
C309
100N SM
C310
100N SM
C314
100N SM
0V_SIG
0V_SIG
D304
1N4003F
D303
1N4003F
R302
10K SM
R327
22K SM
RV300
100R PSET
C312
10N SM
1
2
PL300
BIAS
R325
1K0 SM
R326
1K0 SM
ADJ BIAS
D300
BAS16W SM
R300
10K SM
R309
10K SM
R305
10K SM
R306
10K SM +C305
10U EL
MEASURE
TR318
SAP15N
TR319
SAP15P
R301
10K SM
C315
100N SM
R347
100R SM
R349
100R SM
R348
100R SM
R340
100K SM
DZ302
4V7 350MW SM
DZ303
4V7 350MW SM
3
21
84
IC300A
TL072CD
5
6
7IC300B
TL072CD
R328
4K7 SM
0V_HF
0V_SIG
TR311
FMMT497
TR303
FMMT597
TR310
FMMT497
TR307
FMMT597
INPUT FILTER V TO I AMP
DC SERVO
PNP CURRENT MIRROR
NPN CURRENT MIRROR
PRE DRIVER
PRE DRIVER
OUTPUT STAGE
OUTPUT STAGE
V-I PROTECTION
V-I PROTECTION
VI PROTECT
SIGNAL TO MICRO
DC OFFSET
DETECTION
DC OFFSET SIGNAL
TO MICRO
ZOBEL NETWORK
TR316
FMMT497
TR308
FMMT597
TR317
FMMT497
R311
10K SM
R312
10K SM
R313
10K SM
R303
10K SM
R304
10K SM
R307
10K SM
R310
4K7 SM
R329
4K7 SM
+
C300
100U EL
+
C301
100U EL
R338
150R SM
R339
150R SM
R308
22K SM
R314
10K SM
TR309
FMMT497
TR306
FMMT597 R323 22R SM
R321
22R SM
TP302
TP303
TP304
TP307
TP308
TP305
TP306
R337
22R SM
R331
1K5 SM
R332
1K8 SM
R330
1M0 SM
R333
3K3 SM
R335
3K3 SM
L300
2U2H LAC SMALL
C316
470P PPW C311
100N PC
+C318
10U EL
TR321
FMMT597
TR320
FMMT497
+C302
100U EL 100V
+C306
100U EL 100V
R352
470R 2W
R353
470R 2W
BOOTSTRAP
BOOTSTRAP
R351
5R6 2W CF
C307
100P SM
C308
100P SM
+C303
100U EL
+C304
100U EL
R354
1K0 SM
R355
6K8 SM
TR322
FMMT497
JR 30/1/01 PRODUCTION ISSUE 1.001_1018
01_1101 JR 4/6/01 DC OFFSET CHANGES 1.1