Arcam A85 service manual Part Qty Iss Description Designators

Page 39

ARCAM

 

 

 

 

 

PCB Bill of Materials

Document title: A85 / A32 Integrated amplifier preamp PCB

 

 

 

Document number: L937RS

Issue: 1

Revision: 1

ECO number: 01_E014

Date: 28/11/01

 

Created by:

J Reckless

Page 1 of 2

 

Part

Qty Iss

Description

 

Designators

 

1A022

1

RES SM W4 1% 22R 1206

 

R185

 

 

 

1A047

6

RES SM W4 1% 47R 1206

 

R108

R109

R133

R134

 

 

 

 

 

R186

R187

 

 

1A110

1

RES SM W4 1% 100R 1206

 

R182

 

 

 

1A122

1

RES SM W4 1% 220R 1206

 

R307

 

 

 

1A133

2

RES SM W4 1% 330R 1206

 

R300

R304

 

 

1A147

1

RES SM W4 1% 470R 1206

 

R303

 

 

 

1A210

14

RES SM W4 1% 1K0 1206

 

R100

R101

R102

R125

 

 

 

 

 

R126

R127

R156

R157

 

 

 

 

 

R158

R189

R190

R191

 

 

 

 

 

R195

R196

 

 

1A212

1

RES SM W4 1% 1K2 1206

 

R302

 

 

 

1A222

4

RES SM W4 1% 2K2 1206

 

R110

R111

R135

R136

1A227

4

RES SM W4 1% 2K7 1206

 

R115

R116

R140

R141

1A247

1

RES SM W4 1% 4K7 1206

 

R203

 

 

 

1A256

2

RES SM W4 1% 5K6 1206

 

R117

R142

 

 

1A310

3

RES SM W4 1% 10K 1206

 

R181

R188

R204

 

1A322

41

RES SM W4 1% 22K 1206

 

R112

R113

R114

R118

 

 

 

 

 

R119

R120

R121

R137

 

 

 

 

 

R138

R139

R143

R144

 

 

 

 

 

R145

R146

R147

R148

 

 

 

 

 

R149

R150

R151

R152

 

 

 

 

 

R153

R154

R155

R162

 

 

 

 

 

R163

R164

R165

R166

 

 

 

 

 

R167

R168

R169

R170

 

 

 

 

 

R171

R172

R173

R174

 

 

 

 

 

R175

R176

R177

R178

 

 

 

 

 

R179

 

 

 

1A410

16

RES SM W4 1% 100K 1206

 

R103

R104

R105

R128

 

 

 

 

 

R129

R130

R159

R160

 

 

 

 

 

R161

R180

R192

R193

 

 

 

 

 

R194

R197

R198

R199

1A510

6

RES SM W4 1% 1M0 1206

 

R106

R107

R131

R132

 

 

 

 

 

R183

R184

 

 

1A822

6

RES SM W4 1% 2R2 1206

 

R122

R123

R124

R200

 

 

 

 

 

R201

R202

 

 

2C022

6

MLC 22P 50V NPO 5% SM

 

C115

C136

C148

C149

 

 

 

 

 

C158

C159

 

 

2C110

4

MLC 100P 50V NPO 5% SM

 

C108

C109

C129

C130

2C210

5

MLC 1N0 50V X7R 10% SM

 

C100

C121

C139

C160

 

 

 

 

 

C164

 

 

 

2C310

1

MLC 10N 50V X7R 10% SM

 

C119

 

 

 

2C410

39

MLC 100N 50V X7R 10% SM

C104

C105

C106

C107

 

 

 

 

 

C118

C125

C126

C127

 

 

 

 

 

C128

C143

C144

C145

 

 

 

 

 

C146

C152

C153

C155

 

 

 

 

 

C156

C168

C169

C170

 

 

 

 

 

C171

C172

C173

C174

 

 

 

 

 

C175

C176

C177

C178

 

 

 

 

 

C179

C180

C181

C182

 

 

 

 

 

C183

C184

C185

C186

 

 

 

 

 

C304

C308

C309

 

2D147W

14

WIMA FKP2 470P 63V CAP

 

C101

C102

C103

C122

 

 

 

 

 

C123

C124

C140

C141

 

 

 

 

 

C142

C161

C162

C163

 

 

 

 

 

C165

C166

 

 

Image 39
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.