Arcam A85 service manual IC Vreg POS

Page 35

ARCAM

 

 

 

 

 

PCB Bill of Materials

Document title: A85 POWER AMPLIFIER AND PSU

 

 

Document number: L882RS

 

Issue: 3

Revision: 2

ECO number: 01_1101A

Date: 06/06/01

 

 

Created by:

JR

Page 3 of 3

5D7805

1

IC VREG POS 7805

 

IC201

 

5J7414D

1

SURFACE MOUNT HEX SCHMITT TRIGGER

IC202

 

5M393AD

1

IC COMPARATOR SM DUAL LM393A

IC200

 

6F110

2

PRES 100R LIN HORIZ

 

RV300

RV400

7A9301

1

TRANSFORMER 3VA 9V+9V TYPE 9301

TX200

 

7D002C

2

INDUCT 2U2 12x20mm

 

L300 L400

7D327

1

27mH INDUCTOR

 

L200

 

8A001

1

IEC MAINS CONN PCB INS PX

SK203

 

8D225

1

PHONO SKT 4-WAY EMC GOLD

SK104

 

8D301

1

STEREO JACK PCB

 

SK105

 

8D302

1

MIN JACK DUAL 3.5mm HSJ1002-01-1020

SK201

 

8D418G

2

CAMCON BINDING POST 4WAY GOLD

SK100

SK101

8K2306

1

MOLEX MINI FIT HCS 6 WAY

SK200

 

8K2308

1

MOLEX MINI FIT HCS 8 WAY

SK204

 

8K2404

3

4-WAY AMP CT CONN

 

SK102

SK106 SK107

8K2406

1

6-WAY AMP CT CONN

 

SK205

 

8K6201

4

2WAY MOLEX VERT MALE CONNECTOR

PL100

PL101 PL300

 

 

 

 

 

 

PL400

 

8K7014

1

FFC 14W 2.54MM VER PTH

 

SK103

 

8M101

1

EARTH LEAD

 

 

EL

 

8Q003

1

CAGE CLAMP 16A 1 WAY ARC003-236

SK202

 

8S004

2

FUSEHOLDER 20mm PCB

 

F200 F201

A1008

1

SW PUSH 2PCO

 

SW100

 

A1404

1

VOLTAGE SELECTOR SLIDE SWITCH

SW200

 

A207

2

RELAY G5Z-2A-E 24V

 

RLY100 RLY101

A219

1

RELAY MAINS DPDT 5V 5A

 

RLY200

 

C3751

1

FUSE R452 T750mA

 

F202

 

E5402

1

MAINS EMC SHIELD

 

SH200

 

F006

1

HEATSINK CLIP TO220 13/8.6 DC/W

HS200

 

F008

1

HEATSINK TO220 8.6 DEGC/W

HS200

 

L882PB_3

1

X PRINTED CIRCUIT BOARD

 

PCB

 

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

PDM:

L882PB_3

1

X PRINTED CIRCUIT BOARD

 

PCB

 

***************************************************************************

*********************** Additions Since Last Issue ************************

***************************************************************************

Part

Qty Iss

 

Description

 

Designators

1A310

2

RES

SM

W4

1%

10K

1206

R314

R414

1A322

2

RES

SM

W4

1%

22K

1206

R308

R408

C3751

1

FUSE R452

T750mA

 

F202

 

***************************************************************************

*********************** Deletions Since Last Issue ************************

***************************************************************************

Part

Qty Iss

 

Description

 

Designators

1A247

2

RES

SM

W4

1%

4K7

1206

R314

R414

1A310

2

RES

SM

W4

1%

10K

1206

R308

R408

C3501

1

FUSE R452

T500mA

 

F202

 

Image 35
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.