Arcam A85 service manual Waf

Page 41

ARCAM

 

 

 

 

 

 

PCB Bill of Materials

Document title: A85 DISPLAY PCB

 

 

 

 

 

 

 

 

Document number: L865RS

Issue:2

Revision: 0

ECO number: 01_E028

Date: 13/02/02

 

Created by:

WAF

Page 1 of 2

 

Part

Qty Iss

Description

 

Designators

 

 

1A000

3

RES SM W4

2%

0R0

 

R58

R59

 

R48

 

 

1A110

7

RES SM W4

1%

100R 1206

 

R51

R52

 

R53

R64

R65

 

 

 

 

 

 

R66

R67

 

 

 

 

1A115

1

RES SM W4

2%

150R

 

R34

 

 

 

 

 

 

1A133

1

RES SM W4

2%

330R

 

R33

 

 

 

 

 

 

1A212

2

RES SM W4

2%

1K2

 

R38

R46

 

 

 

 

1A215

10

RES SM W4

2%

1K5

 

R20

R23

 

R24

R31

R17

 

 

 

 

 

 

R18

R19

 

R21

R22

R25

1A222

1

RES SM W4

2%

2K2

 

R39

 

 

 

 

 

 

1A247

2

RES SM W4

2%

4K7

 

R40

R47

 

 

 

 

1A310

36

RES SM W4

2%

10K

 

R49

R50

 

R56

R57

R73

 

 

 

 

 

 

R74

R75

 

R76

R1

R2

 

 

 

 

 

 

R3

R4

R5

R6

R7

R8

 

 

 

 

 

 

R9

R10

R11

R12

R13

 

 

 

 

 

 

R14

R15

 

R16

R26

R27

 

 

 

 

 

 

R28

R29

 

R30

R32

R35

 

 

 

 

 

 

R36

R37

 

R45

R55

R68

1A410

4

RES SM W4

2%

100K

 

R41

R42

 

R43

R44

 

1A822

4

RES SM W4

1%

2R2 1206

 

R69

R70

 

R71

R72

 

2C010A

2

MLC 10P 50V NPO 10% SM

 

C31

C32

 

 

 

 

2C018

2

MLC 18P 50V X7R 10% SM

 

C1 C2

 

 

 

 

 

2C210

11

MLC 1N0 50V X7R 10% SM

 

C39

C40

 

C41

C42

C43

 

 

 

 

 

 

C44

C45

 

C46

C47

C48

 

 

 

 

 

 

C49

 

 

 

 

 

 

2C410

14

MLC 100N 50V

X7R 10% SM

C3 C4 C5 C6

C7 C8

 

 

 

 

 

 

C9

C10

C12

C15

C16

 

 

 

 

 

 

C17

C25

 

C27

 

 

2M610

4

ELST 10U 50V

SM

 

C11

C14

 

C26

C28

 

2M710

1

ELST 100U

25V SM

 

C29

 

 

 

 

 

 

2N722

2

ELST 220U

16V

 

 

C33

C34

 

 

 

 

2W110X4

10

CAP PACK NPO

0612 4X100P 50V 5%

C50

C51

 

C52

C53

C54

 

 

 

 

 

 

C55

C60

 

C61

C62

C63

3AS16W

3

DIODE SS SM BAS16W

 

D2 D3 D5

 

 

 

3C5251B

1

ZENER 22V

OW

35 SM SOT23

D4

 

 

 

 

 

 

3D006

1

LED RED/GREEN 3MM L-93WEGW

LED11

 

 

 

 

 

3D007

10

LED GREEN 3.1MM SLR-37MG3F

LED1 LED2 LED3 LED4

 

 

 

 

 

 

LED5 LED6 LED7 LED8

 

 

 

 

 

 

LED9 LED10

 

 

4A847

4

TRANS LF SS N SM BC847B

Q1 Q2 Q3 Q4

 

 

5D7815

1

IC VREG POS 7815

 

Z12

 

 

 

 

 

 

5G2402

1

IC CMOS EPROM 24C02 SM

 

Z5

 

 

 

 

 

 

5H1233A

1

IC MICRO RESET DS1233 SM

Z2

 

 

 

 

 

 

5H3048

1

H8/3048 128K

FLASH MICROCONTROLLER

Z1

 

 

 

 

 

 

5M393AD

3

IC COMPARATOR SM DUAL LM393A

Z6 Z7 Z8

 

 

 

5M8532

1

DUAL OUTPUT SINGLE SUPPLY AMP AD8532

 

 

 

 

 

 

 

 

 

 

 

 

 

Z11

 

 

 

 

 

 

7X040

1

XTAL 16MHZ SM GSX49-4

 

X1

 

 

 

 

 

 

8K2005

1

5-WAY AMP CT CONN

 

SK2

 

 

 

 

 

 

8K6315

1

14 WAY DIL HEADER HORIZ

SK4

 

 

 

 

 

 

8K7014A

1

FFC 14W 2.54MM HOR PTH

 

SK1

 

 

 

 

 

 

8K8022A

1

22-WAY FFC CONN HORIZ 1MM PTH

SK3

 

 

 

 

 

 

A1211

1

EC16B2414

 

 

 

SW18

 

 

 

 

 

A1505

6

TACT SWITCH SM SDTM-610-NTR

SW11 SW12 SW13 SW14

 

 

 

 

 

 

SW15

SW16

 

 

A1506

1

TACT SWITCH BOURNS SDTX-644

SW17

 

 

 

 

 

A1509

10

TACT SWITCH SM SDTM-620-NTR

SW1 SW2 SW3

SW4 SW5

 

 

 

 

 

 

SW6 SW7 SW8

SW9 SW10

Image 41
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.