Arcam service manual Title A85 Phono PCB

Page 43

 

 

 

 

 

 

TITLE

A85 PHONO PCB

 

 

 

 

 

 

 

 

 

DWG. No. L870RS

ISSUE 2.0

 

ECO No 01_1070

DATE 17-4-01

 

 

 

 

 

 

DRAWN

BY JAG

 

RUN-OUT SHEET

SHEET 1 of 1

 

 

 

 

 

 

 

 

 

 

 

 

Part

Qty Iss

Description

Designators

 

 

1H010

2

 

RES MF

W4

1%

10R

R123

R223

 

 

 

1H022

8

 

RES MF

W4

1%

22R

R118

R119

R120

R121

 

 

 

 

 

 

 

R218

R219

R220

R221

1H110

10

 

RES MF

W4

1%

100R

R101

R102

R104

R105

 

 

 

 

 

 

 

R106

R201

R202

R204

 

 

 

 

 

 

 

R205

R206

 

 

 

1H133

2

 

RES MF

W4

1%

330R

R100

R200

 

 

 

1H256

2

 

RES MF

W4

1%

5K6

R124

R224

 

 

 

1H312

4

 

RES MF

W4

1%

12K

R109

R110

R209

R210

1H315

2

 

RES MF

W4

1%

15K

R115

R215

 

 

 

1H339

2

 

RES MF

W4

1%

39K

R122

R222

 

 

 

1H347

2

 

RES MF

W4

1%

47K

R108

R208

 

 

 

1H356

2

 

RES MF

W4

1%

56K

R111

R211

 

 

 

1H410

6

 

RES MF

W4

1%

100K

R112

R113

R114

R212

 

 

 

 

 

 

 

R213

R214

 

 

 

1H522

4

 

RES MF

W4

1%

2M2

R116

R117

R216

R217

2A410

1

 

CERD 100N

63V -20% +80% RA

C1

 

 

 

 

2D110N

2

 

PPRO 100P

63V 5% RA

C119

C219

 

 

 

2D110W

2

 

PPRO W

100P 63V 5% RA

C109

C209

 

 

 

2D147W

6

 

PPRO W

470P 63V 5% RA

C108

C116

C117

C208

 

 

 

 

 

 

 

C216

C217

 

 

 

2D210

4

 

PPRO 1N0 5% 63V RA

C101

C120

C201

C220

2D213N

2

 

PPRO 1N3 63V

5% RA

C115

C215

 

 

 

2D247N

2

 

PPRO 4N7 63V

5% RA

C110

C210

 

 

 

2D310

4

 

PPRO 10N 63V

1% AXIAL

C111

C112

C211

C212

2K410

8

 

PEST 100N

63V 10%

C104

C105

C106

C107

 

 

 

 

 

 

 

C204

C205

C206

C207

2K510

2

 

CAP MKS2 1U0

16V 10%

C113

C213

 

 

 

2N622

2

 

ELST 22U 63V

 

C100

C200

 

 

 

2P710AS

4

 

ELEC 100U

25V SILMIC

C102

C103

C202

C203

2U610

2

 

ELST NON POLAR 10UF 35V

C118

C218

 

 

 

3A4148

6

 

SSDIODE 1N4148 75V

D100

D101

D102

D200

 

 

 

 

 

 

 

D201

D202

 

 

 

4A1085

4

 

TRANS LF SS P 2SA1085

TR106 TR107 TR206

 

 

 

 

 

 

 

TR207

 

 

 

 

4A546

14

 

TRANS LF SS N BC546B

TR108 TR109 TR110

 

 

 

 

 

 

 

TR111

TR112

TR113

 

 

 

 

 

 

 

TR114

TR208

TR209

 

 

 

 

 

 

 

TR210

TR211

TR212

 

 

 

 

 

 

 

TR213

TR214

 

 

4A556

12

 

TRANS LF SS P BC556B

TR100 TR101 TR102

 

 

 

 

 

 

 

TR103

TR104

TR105

 

 

 

 

 

 

 

TR200

TR201

TR202

 

 

 

 

 

 

 

TR203

TR204

TR205

5B071

2

 

IC FET OPAMP

TL071

IC100 IC200

 

 

8D230

1

 

PHONO SKT

2-WAY HOR EMC GOLD

SK1

 

 

 

 

8K2408

1

 

8-WAY AMP

CT

CONN

SK2

 

 

 

 

A1013

1

 

SW PUSH 4PCO

 

SW100

 

 

 

 

L870PB_2

1

X

PRINTED CIRCUIT BOARD

PCB1

 

 

 

 

******** Obsolete, absent, redundant, or incorrect issue in PDM:

Image 43
Contents A85 Contents List Pre-amplifier circuit description Amplifier & PSU Circuit Description L882 Circuit Sheet PSU Ground naming convention is as follows A85, P85, P85/3 Service Guide Fault Diagnostics A85 amplifier and PSU top sheet Circuit Diagram A85 amplifier power supply and microcontroller interface A85 amplifier power output stage left A85 amplifier power output stage right DVD Display PCB USE Exclude NF When Using Runout Sheet Program Integrated amplifier preamp main signal path Integrated amplifier preamp power supply A85 Display PCB Circuit Diagram A85 Phono Stage TOP Level A85 Phono Stage Left Channel A85 Phono Stage Right Channel AP85 third channel top level 23425 P85 microcontroller and switch Page Page Page Page Page Page Page Arcam 220NF Class X2 CAP 275VRMS IC Vreg POS Wima FKP2 Ppro Obsolete, absent, redundant, or incorrect issue in PDM Part Qty Iss Description Designators Phono SKT 4-WAY EMC Gold SK2 SK3 SK4 SK5 WAF MN12818A VFD Itron DISP1 Title A85 Phono PCB Title RES SM Phono SKT 2-WAY EMC Gold Title P85 Switch Board Tact Switch 2-PIN LOW Prof SW1 SW2 A85 General Assembly Parts List Silver Black Description Where Used QTY P85 General Assembly A85P Transformer P85/3 General Assembly Clamp E912MC to E804HK ST=L
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Manual 14 pages 30.61 Kb

A85 specifications

The Arcam P85 and A85 amplifiers are a testament to Arcam's commitment to high-quality audio performance. These components are well-known in the audiophile community for their unique blend of state-of-the-art technology and superior sound quality, catering to discerning listeners who value fidelity and craftsmanship.

The Arcam A85 is a high-performance integrated amplifier that features a robust design and advanced circuitry. It offers a powerful 85 watts per channel output, which is more than sufficient to drive a wide range of speakers with clarity and precision. The A85 incorporates a dual mono design with separate power supplies for the left and right channels, ensuring low crosstalk and high channel separation. This design choice also enhances the amplifier’s dynamic response, allowing it to handle complex musical passages with ease.

One of the standout features of the A85 is its use of high-quality components, including low-noise transistors and capacitors that are specifically chosen to minimize distortion. The amplifier exhibits an impressive signal-to-noise ratio, contributing to a clean audio signal that preserves the nuances of the music.

On the other hand, the Arcam P85 is a powerful, dedicated power amplifier that pairs perfectly with the A85. It utilizes a Class G amplification technology, which provides significant power efficiency. This means that the P85 can deliver peak power output without generating excessive heat, making it an ideal choice for long listening sessions.

The P85 offers 85 watts per channel into 8 ohms but can also deliver 140 watts into 4 ohms, allowing it to drive even the most demanding loudspeakers with authority. Its balanced XLR inputs, alongside standard RCA inputs, ensure compatibility with various audio sources, while the sturdy construction ensures durability and performance.

Both the A85 and P85 feature a simple yet elegant design, characterized by a sleek chassis that minimizes resonances and maximizes aesthetic appeal. They also come equipped with a variety of connection options, including multiple line-level inputs and outputs, making integration into an existing audio system straightforward.

In summary, the Arcam P85 and A85 amplifiers represent a harmonious fusion of innovative technology, impeccable sound quality, and user-friendly design. Their powerful performance, combined with high efficiency and low distortion, makes them a prized possession for any audiophile seeking to enhance their listening experience. Whether used in a stereo setup or as part of a more extensive home theater system, the A85 and P85 deliver exceptional audio performance that stands the test of time.