Arcam A85 service manual Ppro

Page 37

ARCAM

 

 

 

 

 

PCB Bill of Materials

Document title: A85 PREAMPLIFIER

 

 

 

 

 

Document number: L866RS

Issue: 3

Revision: 1

ECO number: 01_1101

Date: 06/06/01

 

 

Created by:

JR

Page 2 of 3

 

2D210

2

PPRO

1N0 5% 63V RA

 

C314

C315

 

 

2D222W

2

WIMA FKP2

2N2 63V CAP

 

C114

C135

 

 

2H410

2

PCRB

100N

100V 10% RA 5mm

C147

C167

 

 

2K447

8

PEST

470N

63V 10%

 

C112

C113

C133

C134

 

 

 

 

 

 

C150

C151

C192

C193

2N610

8

ELST

10U 50V

 

C120

C154

C187

C188

 

 

 

 

 

 

C189

C190

C191

C305

2N710

3

ELST

100U

25V

 

C110

C131

C157

 

2N722

2

ELST

220U

16V

 

C302

C312

 

 

2N747

1

ELST

470U

25V RA

 

C306

 

 

 

2N810C

2

ELST

1M0 35V

 

C300

C310

 

 

2N833

2

ELST

3M3 25V

 

C303

C313

 

 

2P610CC

6

ELEC

10U 50V CERAFINE

 

C111

C116

C117

C132

 

 

 

 

 

 

C137

C138

 

 

3AS16W

5

DIODE SS SM BAS16W

 

D120

D302

D304

D305

 

 

 

 

 

 

D308

 

 

 

3AV99W

22

DIODE SS SM BAV99W

 

D100

D101

D102

D103

 

 

 

 

 

 

D104

D105

D106

D107

 

 

 

 

 

 

D108

D109

D110

D111

 

 

 

 

 

 

D112

D113

D114

D115

 

 

 

 

 

 

D116

D117

D118

D119

 

 

 

 

 

 

D121

D122

 

 

3BS1D

4

RECT S1D 1A 200V SM

 

D300

D301

D306

D307

3CW315V

2

ZENER 15V

OW35 SM SOT23

D310

D311

 

 

4A846B

1

TRANS LF SS N SM BC846B

Q306

 

 

 

4A849B

1

TRANS LF SS N SM BC849B

Q100

 

 

 

4A856B

1

TRANS LF SS P SM BC856B

Q307

 

 

 

4B1964

1

TRANS AUDIO DRIVER P 2SA1964

Q305

 

 

 

4B5248

1

TRANS AUDIO DRIVER N 2SC5248

Q301

 

 

 

4J112

2

TRANS JFET N J112

 

Q300

Q303

 

 

5A1844

1

IC DS1844S-010

 

Z108

 

 

 

5AVSDVC

1

IC AUDIO DIGITAL VOL SM

Z107

 

 

 

5B072D

6

IC AUDIO SM DUAL TL072

 

Z109

Z110

Z111

Z112

 

 

 

 

 

 

Z113

Z114

 

 

5B2134

3

IC OPAMP DUAL SM OPA2134PA

Z115

Z116

Z117

 

5D317T

1

IC VREG POS LM317T

 

Z301

 

 

 

5S408DY

6

IC 8

TO 1

MUX DG408DY SO16

Z100

Z101

Z102

Z103

 

 

 

 

 

 

Z104

Z105

 

 

5S413DY

1

IC QUAD SPST CMOS SW SO16

Z106

 

 

 

8D225

4

PHONO SKT

4-WAY EMC GOLD

SK2 SK3 SK4 SK5

 

8D226

1

PHONO SKT

2-WAY EMC GOLD

SK6

 

 

 

8K2304

1

MOLEX MINI FIT HCS 4 WAY

SK300

 

 

 

8K2404

1

4-WAY AMP CT CONN

 

SK102

 

 

 

8K2408

1

8-WAY AMP CT CONN

 

SK103

 

 

 

8K6604

1

4-WAY FR LOCK CONN

 

SK301

 

 

 

8K8322

1

22-WAY FFC CONN SM 1mm

 

SK100

 

 

 

8K8330

1

30-WAY FFC VERT CONN SM 1MM

SK101

 

 

 

A216

1

RELAY DPDT 5V SM NEC EB2-5NU

RLY100

 

 

C3751

2

FUSE

R452

T750mA

 

F300

F301

 

 

L866PB_3

1

X PRINTED CIRCUIT BOARD

 

PCB1

 

 

 

Image 37
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.