Arcam A85 service manual P85/3 General Assembly

Page 53

P85/3 General Assembly

ITEM

230V

115V

100V

SILVER

BLACK

DESCRIPTION

WHERE USED

QTY

 

 

 

 

 

 

 

 

 

 

5B483028

 

 

 

 

PIC CHIP + L819SW

 

1

 

 

 

 

 

 

 

 

 

 

8K004

 

 

 

 

2 WAY JUMPER SKT

 

2

 

 

 

 

 

 

 

 

 

 

8K006

 

 

 

 

CONNECTOR 14MM SNORTING BAR

 

1

 

 

 

 

 

 

P2148

 

 

 

 

 

 

 

 

 

 

 

 

C12406

C12406

TBA

 

 

FUSE 20MM 4AT

FUSE & SPARE FUSE HOLDER

2

 

 

 

 

 

 

 

 

 

 

E031AY

 

 

 

 

REAR PANEL ASSEMBLY

 

1

 

 

 

 

 

 

 

 

 

 

E804HK

 

 

 

 

HEAT-SINK

 

1

 

 

 

 

 

 

 

 

 

 

E804MI

 

 

 

 

MAINS INSULATOR

ON TOP OF CHASSIS UNDER TX

1

 

 

 

 

 

 

 

SPACER

 

 

 

 

 

 

 

 

 

 

 

E806HK

 

 

 

 

P85 3RD CHANNEL HEAT-SINK

 

1

 

E821CH

 

 

 

 

CHASSIS

 

1

 

 

 

 

 

 

 

 

 

 

E823AP

 

 

 

 

P85 TX MASK

 

1

 

 

 

 

 

 

 

 

 

 

E83001

 

 

 

 

TX GASKET

UNDER TX

1

 

 

 

 

 

 

 

 

 

 

E866MC

 

 

 

 

TORODIAL SAFETY SHEILD

UNDER TX & WASHER

1

 

 

 

 

 

 

 

 

 

 

E869PM

 

 

 

 

TACT BUTTON POWER

 

1

 

 

 

 

 

 

 

 

 

 

E879PM

 

 

 

 

FOOT

 

6

 

 

 

 

 

 

 

 

 

 

E879SL

 

 

 

 

CONFIGURATION LABEL

CHASSIS

1

 

 

 

 

 

 

 

 

 

 

E907MC

 

 

 

 

KOOL PAD

HEAT SINK

1

 

 

 

 

 

 

 

 

 

 

E909MC

 

 

 

 

P85 3RD CHANNEL SIL PAO

 

1

 

E912MC

 

 

 

 

85 AMP TRANSISTOR CLAMP

FOR HEAT-SINKS E804HK & E806HK

6

 

 

 

 

 

 

 

 

 

 

E921MC

 

 

 

 

HEATSINK CLAMP

HEAT SINK

1

 

 

 

 

 

 

 

 

 

 

E922SL

 

 

 

 

P85 3RD CHANEL FUSE LABEL

 

2

 

 

 

 

 

 

 

 

 

 

F022

 

 

 

 

FUSE HOLDER COVER

FOR FUSE HOLDERS

2

 

 

 

 

 

 

 

 

 

 

F037

 

 

 

 

TOROID CLAMP

FOR TX

1

 

 

 

 

 

 

 

 

 

 

F038

 

 

 

 

RUBBER WASHER

ON TOP OF TX

2

 

 

 

 

 

 

 

 

 

 

F065

 

 

 

 

ADHESIVE CABLE CLIP

FOR TX SCREEN WIRE

1

 

 

 

 

 

 

 

 

 

 

F065

 

 

 

 

ADHESIVE CABLE CLIP

FOR TX SCREEN WIRE

1

 

 

 

 

 

 

 

 

 

 

F162

 

 

 

 

TAPE 50m ROLL

ON TOP OF HEAT SINK

0.003

 

 

 

 

 

 

 

 

 

 

F164

 

 

 

 

DAMPING PAD

COVER TO FP

400MM

 

 

 

 

 

 

 

 

 

 

F200

 

 

 

 

HOLE BLANKING GROMMET

FOR REAR PANEL

2

 

 

 

 

 

 

 

 

 

 

HA3V10A

 

 

 

 

M3 x 10mm SCREW

MOTHER PCB & SUB-FRONT

22

 

 

 

 

 

 

 

 

 

 

HA3V06A

 

 

 

 

MC TORX P/H M3X6 STZP

 

4

 

 

 

 

 

 

 

 

 

 

HA4A12B

 

 

 

 

M4 x12mm SCREW

 

 

 

 

 

 

 

 

 

 

 

 

HA5K70B

 

 

 

 

M5 x 70mm BOLT

HEATSINK SCREWS

5

 

 

 

 

 

 

 

 

 

Image 53
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.