Arcam Diva A-80 Schematic

FD100 FD101

Downloaded from http://receiverfaq.ru/

LS100
G P PRECISION

Left Outputs

ITEM100 1 Blank PCB Diva A80 AmpL943PB
ITEM101 1 Tape D/Sided 12MM X 70MM DS Polyester 4965F205 Placed between VFD and PCB; NF ON P80
ITEM102 1 Earth Lead Assy 75MM8M101
ITEM103 2 Pad Damping 15x6x3MM SorbothaneE802AP
ITEM104 4 13/16 inch O-RingF232

Soldered to SKT200
Placed on output relays
Rubber O-Rings fitted over main power supply caps

ANNOTATION

FIX100
Dia 3.5mm

Power Supplies
L943C2_5.1.SCH

A80 PreAmp
L943C3_5.1.SCH

PWR_ON

FIX101
Dia 3.5mm

1

P101

0V(D)

+4.8V(D)

0V_LS_L
0V_HF_L
0V_FB_L

0V(SIG_2)

0V_FB_R
0V_HF_R
0V_LS_R

0V(PSU)

-38V_VFD

0V_PREOUT

*PRE_MUTE

0V_D_PRE

TAPE_0
TAPE_1
TAPE_2

VOL_SCLK

0V_SER

VOL_SDATA

VOL_*CS

LISTEN_0
LISTEN_1
LISTEN_2

+15V(A)

+5V(A)

+4.8V_D_PRE

*PRE_RLY

0V(SIG)

0V(SIG_2)

-15V(A)
PRE_OUT_L
PRE_OUT_R

C101
100N
50V
0805

9VRMS

+45V_R

+45V_L

0V(D)

0V(SIG)

-45V_L

-45V_R

FIL_1
FIL_2

+15V(A)

+5V(A)

-15V(A)

FIX102
Dia 3.5mm

FIX103
Dia 3.5mm

*PRE_MUTE
0V(D)

TAPE_0
TAPE_1
TAPE_2

VOL_SCLK
0V(SER)
VOL_SDATA
VOL_*CS

LISTEN_0
LISTEN_1
LISTEN_2

FIX104
Dia 3.2mm

9VRMS
+4.8V(D)

+45V_R
+45V_L

0V(D)
0V_LS_L
0V_HF_L
0V_FB_L
0V(SIG)
0V(SIG_2)

0V_FB_R
0V_HF_R
0V_LS_R

-45V_L

-45V_R

-38V_VFD
FIL_1
FIL_2

+15V(A)
+5V(A)

-15V(A)

TAPE_0
TAPE_1
TAPE_2

PreAmp Controls

VOL_SCLK
0V(SER)
VOL_SDATA

LISTEN_0
LISTEN_1
LISTEN_2

0V(D)
*PRE_MUTE
VOL_*CS

+15V(A)
+5V(A)

0V(SIG)
0V(SIG_2)

-15V(A)

+45V_L

0V_FB_L

-45V_L
0V_HF_L
0V_LS_L

Power Supplies

+45V_R

0V_FB_R

-45V_R
0V_HF_R
0V_LS_R

+45V_L
+4.8V(D)
0V(D)

+45V_L
+45V_R
+4.8V(D)
0V(D)

0V(SIG)

-45V_L

-38V_VFD
FIL_1
FIL_2

9VRMS

+45V_L
0V(D)

Power Amp Left
L943C4_5.1.SCH

PRE_OUT_L

0V_FB_L

Power Amp Right
L943C5_5.1.SCH

PRE_OUT_R

0V_FB_R

A80/P80 Protection & Micros
L943C6_5.1.SCH

OUTPUT_L
OUTPUT_R

+45V_L
+45V_R
+4.8V(D)
0V(D)

0V(SIG)

-45V_L

-38V_VFD
FIL_1
FIL_2

TAPE_0
TAPE_1
TAPE_2
VOL_SCLK
0V_SER
VOL_SDATA

LISTEN_0
LISTEN_1
LISTEN_2
+4.8V_D_PRE
0V_D_PRE
*PRE_MUTE
VOL_*CS
VIPROT_L
VIPROT_R
9VRMS

REMOTE_P
REMOTE_N
TRIG_IN

VIPROT_L

OUTPUT_L

0V_LS_L
0V_HF_L

VIPROT_R

OUTPUT_R

0V_LS_R

0V_HF_R

0.38Hz_CLK

SPKR2_ON
SPKR1_ON

PWR_ON

+45V_L

-45V_L

+45V_R

-45V_R

*RESET

R100
5R6

2W
CF

L100
2U2

R101
5R6

2W
CF

L101
2U2

RLY100A
Omron

G5Z-2AE
RLY101A

Omron
G5Z-2AE

RLY100B

Omron

G5Z-2AE
RLY101B

Omron
G5Z-2AE

A80 Trigger, RC5 & P80 Sig Detect
L943C7_5.1.SCH

+45V_L
+4.8V(D)
0V(D)
0V_CHASS

0.38Hz_CLK
*RESET

PRE_OUT_L
0V_PREOUT
PRE_OUT_R

REMOTE_P
REMOTE_N

TRIG_IN

LS101
G P PRECISION

Right Outputs

R105
330R
1W
CF

GENERAL NOTES

This is the Master Schematic for A80 (L943AY) and P80 (L944AY) PCB
assemblies. Any changes to the schematics in this document must be
reflected in the relevant child documents.

When generating BOMs for L943AY or L944AY, ensure that the relevant
components are fitted or not fitted (those with "NF" or "FIT" in the nearby text).

These schematics follow a simple heirarchy scheme. Sheet symbols on the top
sheet represent a child or sub-sheet. Net labels on sub-sheets are local or
specific to that sheet. Ports on the sub-sheets connect to sheet entries on
the parent sheet, where they are connected together.

Primary power nets are denoted by type in parenthesis, e.g. 0V(D).
Secondary nets are denoted by underscores, e.g. 0V_LS_L.

To perform an electrical rule check or synchronise with the PCB, set Net
Identifier Scope to Sheet Symbols/Port Connections.

R104
330R
1W
CF

Q121
Q125

Q106
Q111

CON100
1
2
3
4
5

AMP

CT

CON101

AMP
CT

HEADPHONE OUTPUT & MUTE

1

Q113

2

Q114

3

Q115Q118

4

Q116

5

Q117

R107
100R
1W
CF

(NF ON P80)

R106
100R
1W
CF

RLY102A
NEC
EB2-5NU

RLY102B
NEC

EB2-5NU

RLY102C
NEC
EB2-5NU

NF

R102 0R0
0W125 0805

NF

R103 0R0
0W125 0805

D102
BAS16
SOT-323

NCL

NCR

CL

CR

SKT100

2
3
1

HOSIDEN
HLJ

OUTPUT MUTING

SPKR2_ON

SPKR1_ON

R108 220R
0W25 MF
R109 220R
0W25 MF

D100
1N4003
DO-41

RLY100C
Omron

G5Z-2AE

TR100
BD179
TO-126

R110
220R
0W25
MF

R114
0R0
0W25
MF

RLY101C
Omron

G5Z-2AE

R112
2K2
0W125
0805

TR101
BD179
TO-126

R111
220R
0W25
MF

R113
2K2
0W125
0805

D101
1N4003
DO-41

L
R

A80 & P80 Display Circuitry
L943C8_5.1.SCH

Flexfoil

DRAWING TITLE

23425

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

A80/P80 - T op Lev el Sheet

Filename:

L943C1_5.1.SCH

Notes:

A80

Contact Engineer:

03_E264 MJT 09 Sept 03 None to this sheet. Remove EMC can from around IEC inlet. 5.1
03_E230 MJT 04 Aug 03 5.0
03_E147 MJT 23 May 03 None to this sheet. PCB change. 4.0
03_E120 TGP 13 May 03 LEDs, BIAS & DOCUMENTATION CHANGE 3.0
03_E116 TGP NO CHANGE TO THIS SHEET 2.117 APR 03

INITIALS

ECO No. DESCRIPTION OF CHANG E

Contact Tel: [phone]Mark Tweedale

Printed:

Changed P80 s/w & fitted IC socket for IC603 (P80 only).
Display snapoff fixing holes reduced to 3.2mm

DATE

9-Sep-2003

18Sheet of

DRAWING NO.

L943C1

ISSUE

SH200

EMC Shield

NF

SKT200

N
E
L

BULGIN
PX0580

1

This EMC can should now not appear
on any BoM as there is a safety
issue regarding the can shorting to a
live mains track on the top layer.

Consider removing the holes for the
can or perhaps move mains tracks
onto bottom layer for next PCB
revision.

C200
3N3
250V
CER

C201
3N3
250V
CER

EARTH

NEUTRAL

LIVE

C209

115V 230V

220N
275V
PP X2

2A22B

1A11B

SW200
18-000-0019

FS201
T2.5A
S506

FHLDR201
20mm HLDR

FS200
T2.5A
S506

FHLDR200
20mm HLDR

MAINS WIRING AND AUXILIARY SUPPLY

TX200

1 5

9V

9V

PCB Mount Frame

7A9301

CON201
WAGO
256

3

BLUE

2

DK GREY

1

ORANGE

1

GREEN

CON202
WAGO
256

CON203

1

GREEN

WAGO
256

6

FS202
T500mA

R452

8

FIX200
Dia 3.2mm

RLY200A
Takamisawa
F1CA005V

C202
3N3

250V
CER

RLY200B
Takamisawa
F1CA005V

C203
3N3
250V
CER

1

115V

2
3 7

115V

4

C221
100N
100V
MKS2

L916TX

(CHASSIS-MOUNTED)

BLUE

BLUE

115V ac
BLACK

ORANGE

115V ac
GREEN

GREEN/YELLOW
Interwinding Screen

WHITE
BLACK

GREY

WHITE

3.2Vac
WHITE

ORANGE
16Vac
BLUE
16Vac
ORANGE

DBR203
3BDF01M

C225
1000UF
25V
YK

HS201A
SW50-2

8.8C/W

CON204

WAGO
256

REG201
LM317T

TO-220

BLUE
LT GREY
DK GREY

GREY

D214
BAS16
SOT-323

ADJ

R217
680R
0W125
0805

1
2
3
4

ITEM203 1 Clip For SW Profile HeatsinkF006

+4.8V(D)

R218
220R
0W25
MF

R219
22R
0W125
0805

0V(D)

0V(D)

C205
470N
100V
MKS2

PCB Traces to route as shown h ere

C206
470N
100V
MKS2

C226
1000UF
10V
YK

9VRMS

+4.8V(D)

POWER AMP SUPPLIES

SP200

DBR200
GBU8D

DBR201
GBU8D

SP201

C228
3,300UF
63V
USR

C230
3,300UF
63V
USR

PWR_ON

C229
3,300UF
63V
USR

C231
3,300UF
63V
USR

R216
2K2

0W125
0805

P202

+4.8V(D)

0V(D)

RLY200C
Takamisawa
F1CA005V

TR202
FMMT497
SOT-23

R221 0R0
0W125 0805

SP202

D215
BAS16
SOT-323

0V(SIG)
0V(D)
0V_FB_R
0V_LS_L
0V_LS_R

0V_HF_R
0V_HF_L

0V_FB_L

+45V_R
+45V_L

0V(SIG)

0V(D)

0V_FB_R
0V_LS_L
0V_LS_R

0V_HF_R
0V_HF_L

0V(PSU)

0V_FB_L

-45V_L

-45V_R

ANNOTATION

CON200

ORANGE

BLUE

ORANGE

WAGO 256

ANALOGUE OP-AMP SUPPLIES

FS203
T2A

R452

C204
470N
100V

FS204
T2A

R452

MKS2

1
2
3

C211
100N
50V
0805

C210
100N
50V
0805

D200
1N4003
DO-41

D202
1N4003
DO-41

(NF ON P80)

D201
1N4003
DO-41

D203
1N4003
DO-41

R204
0R0

0W125
0805

R205
0R0

0W125
0805

C215
1000UF
35V
YK

C216
1000UF
35V
YK

C214
100N
50V
0805

C213
100N
50V
0805

HS200A
6043PB
23C/W

HS202A
6043PB
23C/W

D210
BAS16
SOT-323

REG200
LM317T

ADJ

TO-220

C217
100UF
25V
YK

C218
100UF
25V
YK

REG202
LM337T

ADJ

TO-220

D211
BAS16
SOT-323

P200

P201

R207
100R
0W125
0805

R208
100R
0W125
0805

R213
2K2
0W125
0805

R214
2K2
0W125
0805

R209
100R
0W125
0805

R210
100R
0W125
0805

D212
BAS16
SOT-323

D213
BAS16
SOT-323

C207
22UF
20V
OSCON

C208
22UF
20V
OSCON

R206
10R
0W125
0805

C224
1000UF
25V
YK

R215
2K2
0W125
0805

DZ200
BZX84C
5V6
SOT-23

TR200
BC849B
SOT-23

SP203

C219
100UF
25V
YK

0V(SIG_2)

+15V(A)

+5V(A)

+4.6V to +5.3V

C220
100UF
25V
YK

0V(SIG)

Track by pre-out to pwr-in

0V(SIG_2)

For preamp bulk decoupling

-15V(A)

CON205

WAGO
256

2

GREY

1

GREY

DRAWING TITLE

23425

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

R203
2R2

0W33
FU

A80/P80 Power Supplies

Filename:
Notes:

Contact Engineer:

VFD SUPPLY

(NF ON P80)

C222
100N
50V
0805

L943C2_5.1.SCH

A80

C212

0V(D)

22UF

28Sheet of

63V
YK

DRAWING NO.

-38V_VFD

FIL_1

FIL_2

ISSUE

L943C2

R211
1K0

0805
0W125

03_E264 MJT 09 Sept 03 Remove EMC can from around IEC inlet. 5.1
03_E230 MJT 04 Aug 03 None to this sheet. Display snapoff fixing holes reduced to 3.2mm 5.0
03_E147 MJT 23 May 03 Removed double connection from R221 to star point . PCB change. 4.0
03_E120 TGP 13 May 03 LEDs, BIAS & DOCUMENTATION CHANGE 3.0
03_E116 TGP R204, R205 CHANGED FROM 2R2 TO 0R 2.117 APR 03

INITIALS
Printed:

DATE

9-Sep-2003

Contact Tel: [phone]Mark Tweedale

ECO No. DESCRIPTION OF CHANG E

0V_LS_L

DZ406
BZX84C
3V9
SOT-23

+45V_L

ANNOTATION

VIPROT_L

OUTPUT_L

0V_LS_L

0V_HF_L

-45V_L

->

R405
47R
0W125
0805

0V_FB_L

0V_FB_L

C417
100N
50V
0805

C416
470P
100V
FKP2

DZ405
BZX84C
15V
SOT-23

C420
100N
50V
0805

P401

3

2

Q403

84

Q409

TR408
FMMT497
SOT-23

IC400A
TL072CD
SO-8

TR404
FMMT597
SOT-23

R400
22K
0W125
0805

C410
100UF
25V
YK

0V_HF_L

INPUT FILTER V TO I AMP

PRE_OUT_L

P415

SHEET 3

0V_FB_L

DZ402
BZX84C
3V9
SOT-23

DZ403
BZX84C
3V9
SOT-23

0V_HF_L

R410
1K0

0W125
0805

C419
100N
50V
0805

C414
100UF
25V
YK

DZ404
BZX84C
15V
SOT-23

R402
22K
0W125
0805

0V_HF_L

TR400
BC859B
SOT-23

1

0V_FB_L

D400
BAS16
SOT-323

NF

C400

P402

47P
100V
0805

R443
4K7
0W125
0805

0V_FB_L 0V_FB_L

R445
22R
0W25
MF

R446
22R
0W25
MF

NF

C401

P433
47P
100V
0805

PNP CURRENT MIRROR

NF

R409
1K0

0W125
0805

INTEGRATING DC SERVO

C422

470N
100V
MKS2

7

IC400B
TL072CD
SO-8

NF

R451 18K
0W25 MF

R447
820R

0W25
MF

R448
820R

0W25
MF

NF

R412
1K0

0W125
0805

NPN CURRENT MIRROR

P454

R407
47R
0W125
0805

TR416
BC849B
SOT-23

D404
BAS16
SOT-323

R404
22K
0W125
0805

R415
220R
0W25
MF

R406
47R
0W125
0805

P408

TR401
BC859B
SOT-23

P409

P440

R437
5K6
0W125
0805

P459

P407

P442

TR402
FMMT597
SOT-23

NF

R419
470K
0W125
0805

0V_FB_L

TR412B
ZDT6758
SM-8

REF400

LM431AIM3
SOT-23

PRE DRIVER BIAS
& TEMP. COMP.

TR414A
ZDT758
SM-8

R433
22R
0W125
0805

TR411
FMMT497
SOT-23

P458

TR417
BC849B
SOT-23

R408
47R
0W125
0805

P404

R418
1K0

0W125
0805

P405

123

R440 4K7

0W125 0805
R403 10K
0W125 0805

R439
22K
0W125
0805

C415
100UF
25V
YK

P438

C402

100P
100V
0805

P439

C403

100P
100V
0805

R460
330R
0W125
0805

R413
1K0
0W125
0805

R417
1K0

0W125
0805

R420
1M0

0W125
0805

6

D409

P420

5

BAV99
SOT-23

NF

R458 18K

R416
220R
0W25
MF

0W25 MF

C406
10N
100V
0805

CON400
HARWIN
M20-973

*

P456

R449
820R

0W25
MF

R450
820R

0W25
MF

~1.6V

0V_FB_L

0V_FB_L

C411
100UF
25V
YK

NF

R421
470K
0W125
0805

C404
10N
100V
0805

0V_FB_L

C407
10N
100V
0805

BOOTSTRAPBOOTSTRAP

PRE DRIVER

TR407
FMMT497
SOT-23

C423
100UF
100V
YK

R452
1K0
1W
CF

R453
1K0
1W
CF

C424
100UF
100V
YK

TR405
FMMT597
SOT-23

PRE DRIVER

P410

P444

R422
100R

0W125
0805

R427
100R

0W125
0805

D405
1N4003
DO-41

C425
10UF
50V
YK

D408
1N4003
DO-41

TR412A
ZDT6758
SM-8

P411

R431
22R
0W125
0805

R423
220R
0W25
MF

D401
BAS16
SOT-323

BIAS MEASURE BIAS

ADJUST

C405
10N
100V
0805

R428
220R
0W25
MF

R434
22R
0W125
0805

P400

TR414B
ZDT758
SM-8

TR413

SAP15NY
SAP

RV400
220R
LIN

TR415

SAP15PY
SAP

C408
22UF
63V
YK

0V_HF_L

DZ400
22V
BZX84C
SOT-23

P403

OUTPUT STAGE V-I PROTECTION

R438
10K
0W125
0805

R456

R411
1K0
0W125
0805

R454
100K
0W125
0805

R414
1K0
0W125
0805

CON401
HARWIN
M20-973

1
2

330R
0W125
0805

R457
330R

0W125
0805

P427

P449

R424
100R
0W125
0805

R429
100R
0W125
0805

R432
22R
0W125
0805

C412
100UF
25V
YK

C413
100UF
25V
YK

R435
22R
0W125
0805

R441
10K
0W125
0805

R425
100R

0W125
0805

R430
100R

0W125
0805

P429

P451

V-I PROTECTION

P406

DZ401
22V
BZX84C
SOT-23

0V_HF_L

C409
22UF
63V
YK

D402
BAS16
SOT-323

P430

TR409
FMMT497
SOT-23

TR406
FMMT597
SOT-23

P452

D403
BAS16
SOT-323

R426
100R

0W125
0805

D406
1N4003
DO-41

D407
1N4003
DO-41

P431

P413

R436
10K
0W125
0805

R442
4K7
0W125
0805

P432

TR410
FMMT497
SOT-23

0V_HF_L

0V_HF_L

TR403
FMMT597
SOT-23

P414

R401
10K
0W125
0805

R444
10K
0W125
0805

R459
5R6
2W
CF

ZOBEL NETWORK

C427
100N
100V
MKS2

VI PROTECT
SIGNAL TO MICRO

C426
10UF
50V
YK

OUT_L

C421

100N
50V
0805

ITEM400 1 Con Jumper Socket 0.1IN Gold Blue8K004

* - Default jumper setting on pins 2 & 3; fit jumper
on pins 1 & 2 to increase bias voltage;
remove jumper to decrease bias voltage

DRAWING TITLE

23425

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

A80/P80 - Po wer Amp Left

Filename:

L943C4_5.1.SCH

Notes:

A80

Contact Engineer:

03_E264 MJT 09 Sept 03 None to this sheet. Remove EMC can from around IEC inlet. 5.1
03_E230 MJT 04 Aug 03 None to this sheet. Display snapoff fixing holes reduced to 3.2mm 5.0
03_E147 MJT 23 May 03 None to this sheet. PCB change. 4.0
03_E120 TGP 13 May 03 LEDs, BIAS & DOCUMENTATION CHANGE 3.0
03_E116 TGP NO CHANGE TO THIS SHEET 2.117 APR 03

INITIALS
Printed:

DATE

9-Sep-2003

48Sheet of

DRAWING NO.

L943C4

Contact Tel: [phone]Mark Tweedale

ECO No. DESCRIPTION OF CHANG E

ISSUE

->

R505
47R
0W125

R500
22K
0W125
0805

0V_FB_R

0V_FB_R

C517
100N
50V
0805

C516
470P
100V
FKP2

DZ505
BZX84C
15V
SOT-23

C520
100N
50V
0805

C510
100UF
25V
YK

0V_HF_R

INPUT FILTER V TO I AMP

PRE_OUT_R

P515

SHEET 3

0V_FB_R

DZ502
BZX84C
3V9
SOT-23

DZ503
BZX84C
3V9
SOT-23

0V_HF_R

R510
1K0

0W125
0805

C519
100N
50V
0805

C514
100UF
25V
YK

DZ504
BZX84C
15V
SOT-23

R502
22K
0W125
0805

0V_HF_R

0805

P501

TR508
FMMT497
SOT-23

Q503

IC500A
TL072CD

84

3

SO-8

2

Q509

TR504
FMMT597
SOT-23

TR500
BC859B
SOT-23

1

0V_FB_R

R545
22R
0W25
MF

R546
22R
0W25
MF

D500
BAS16
SOT-323

NF

C500

47P
100V
0805

NF

C501

47P
100V
0805

NF

R509

P502

1K0
0W125
0805

INTEGRATING DC SERVO

C522

470N
100V
MKS2

7

R543

IC500B

4K7

TL072CD

0W125

SO-8

0805

NF

R551 18K
0W25 MF

R547
820R

0W25
MF

R548
820R

0W25
MF

P533

PNP CURRENT MIRROR

0V_FB_R0V_FB_R

NF

R512
1K0

0W125
0805

NPN CURRENT MIRROR

P554

R507
47R
0W125
0805

TR516
BC849B
SOT-23

D504
BAS16
SOT-323

R504
22K
0W125
0805

R515
220R
0W25
MF

R506
47R
0W125
0805

P508

TR501
BC859B
SOT-23

P509

P540

P507

R537
5K6
0W125
0805

P559

P542

TR502
FMMT597
SOT-23

NF

R519
470K
0W125
0805

0V_FB_R

TR512B
ZDT6758
SM-8

REF500

LM431AIM3
SOT-23

PRE DRIVER BIAS
& TEMP. COMP.

TR514A
ZDT758
SM-8

R533
22R
0W125
0805

TR511
FMMT497
SOT-23

P558

TR517
BC849B
SOT-23

R508
47R
0W125
0805

P504

C502

R517

P505

1K0

100P

0W125

100V

0805

0805

R520
1M0

0W125
0805

6

D509

P520 P527

5

BAV99
SOT-23

NF

R558 18K

R516
220R
0W25
MF

0W25 MF

C506
10N
100V
0805

CON500
HARWIN
M20-973

*

P556

R518
1K0

0W125
0805

123

R540 4K7

0W125 0805
R503 10K
0W125 0805

R539
22K
0W125
0805

P539
C515
100UF
25V
YK

P538

R560
330R
0W125
0805

R513
1K0
0W125
0805

C503

100P
100V
0805

R549
820R

0W25
MF

R550
820R

0W25
MF

~1.6V

0V_FB_R

0V_FB_R

C511
100UF
25V
YK

NF

R521
470K
0W125
0805

0V_FB_R

C504
10N
100V
0805

C507
10N
100V
0805

BOOTSTRAPBOOTSTRAP

PRE DRIVER

TR507
FMMT497
SOT-23

C523
100UF
100V
YK

R552
1K0
1W
CF

R553
1K0
1W
CF

C524
100UF
100V
YK

TR505
FMMT597
SOT-23

PRE DRIVER

P510

P544

R522
100R

0W125
0805

R527
100R

0W125
0805

D505
1N4003
DO-41

C525
10UF
50V
YK

D508
1N4003
DO-41

TR512A
ZDT6758
SM-8

P511

R531
22R
0W125
0805

R523
220R
0W25
MF

D501
BAS16
SOT-323

BIAS MEASURE BIAS

ADJUST

C505
10N
100V
0805

R528
220R
0W25
MF

R534
22R
0W125
0805

P546

TR514B
ZDT758
SM-8

TR513

SAP15NY
SAP

RV500
220R
LIN

TR515

SAP15PY
SAP

C508
22UF
63V
YK

0V_HF_R

DZ500
22V
BZX84C
SOT-23

Q500

OUTPUT STAGE V-I PROTECTION

R538
10K
0W125
0805

R511
1K0
0W125
0805

R554
100K
0W125
0805

R514
1K0
0W125
0805

CON501
HARWIN
M20-973

1
2

R556
330R

0W125
0805

R557
330R

0W125
0805

P549

R524
100R
0W125
0805

R529
100R
0W125
0805

R532
22R
0W125
0805

C512
100UF
25V
YK

C513
100UF
25V
YK

R535
22R
0W125
0805

R541
10K
0W125
0805

R525
100R

0W125
0805

R530
100R

0W125
0805

P529

P551

V-I PROTECTION

Q511

DZ501
22V
BZX84C
SOT-23

0V_HF_R

C509
22UF
63V
YK

D502
BAS16
SOT-323

P530

TR509
FMMT497
SOT-23

TR506
FMMT597
SOT-23

P552

D503
BAS16
SOT-323

R526
100R

0W125
0805

D506
1N4003
DO-41

D507
1N4003
DO-41

P531

P513

R536
10K
0W125
0805

R542
4K7
0W125
0805

P532

TR510
FMMT497
SOT-23

0V_HF_R

0V_HF_R

TR503
FMMT597
SOT-23

P514

R501
10K
0W125
0805

R544
10K
0W125
0805

R559
5R6
2W
CF

ZOBEL NETWORK

C527
100N
100V
MKS2

VI PROTECT
SIGNAL TO MICRO

C526
10UF
50V
YK

OUT_R

C521

100N
50V
0805

0V_LS_R

DZ506
BZX84C
3V9
SOT-23

+45V_R

ANNOTATION

VIPROT_R

OUTPUT_R

0V_LS_R

0V_HF_R

-45V_R

ITEM500 1 Con Jumper Socket 0.1IN Gold Blue8K004

* - Default jumper setting on pins 2 & 3; fit jumper
on pins 1 & 2 to increase bias voltage;
remove jumper to decrease bias voltage

DRAWING TITLE

23425

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

A80/P80 - Power Amp Right

Filename:

L943C5_5.1.SCH

Notes:

A80

Contact Engineer:

Contact Tel: [phone]Mark Tweedale

03_E264 MJT 09 Sept 03 None to this sheet. Remove EMC can from around IEC inlet. 5.1
03_E230 MJT 04 Aug 03 None to this sheet. Display snapoff fixing holes reduced to 3.2mm 5.0
03_E147 MJT 23 May 03 None to this sheet. PCB change. 4.0
03_E120 TGP 13 May 03 LEDs, BIAS & DOCUMENTATION CHANGE 3.0
03_E116 TGP NO CHANGE TO THIS SHEET 2.117 APR 03

INITIALS
Printed:

DATE

9-Sep-2003

58Sheet of

DRAWING NO.

L943C5

ECO No. DESCRIPTION OF CHANG E

ISSUE