Arcam FMJ A32, P35/3 service manual A85 amplifier and PSU top sheet

Page 22

1

2

3

4

5

6

7

 

 

 

8

D

 

L882C3

 

L SIG

L882C3_4.1.SCH

 

INPUT

VIPROT

0V_SIG

0V_SIG

DCPROT

0V_LS_L

0V_LS

OUTPUT

0V_HF_L

0V_HF

 

+49V

 

VPOS

 

-49V

 

VNEG

 

 

 

 

 

 

 

L882C4

 

R SIG

L882C4_4.1.SCH

 

INPUT

VIPROT

0V_SIG

0V_SIG

DCPROT

0V_LS_R

0V_LS

OUTPUT

0V_HF_R

0V_HF

 

+49V

 

VPOS

 

-49V

 

VNEG

 

 

 

 

 

 

VIPROT_L DCPROT_L LS L

VIPROT_R DCPROT_R LS R

 

 

 

 

 

L882C2

 

 

 

0V_D

 

 

L882C2_4.1.SCH

 

+5V_D

 

0V_PSU

 

 

0V_D

+5V(D)

 

 

 

 

 

0V_PSU

VPOS

+49V

 

STANDBY

 

 

-49V

 

 

 

PWRON

VNEG

 

VIPROT_L

 

 

THERMPROT

 

 

 

VIPROT_L THPROT_uC

 

VIPROT_R

 

 

VIPROT

 

 

 

VIPROT_R VIPROT_uC

 

0V_TRIG

 

 

AC PRESENT

 

 

 

0V_TRIG

AC_PRES

 

DCPROT_L

 

 

DCPROT

 

 

 

DCPROT_L DCPROT_uC

 

DCPROT_R

 

 

REMOTE

 

 

 

DCPROT_R

RC5 IN

 

 

 

 

 

TRIGGER

 

 

 

 

 

 

TRG IN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

0V_SIG

0V_TRIG

 

5

 

 

6

0V_HF_R

 

 

 

 

 

TP121

0V_D

1

 

 

2

0V_LS_R

 

 

 

 

0V_HF_L

 

8

 

 

 

7

0V_LS_L

 

SP100

4

 

 

 

0V_PSU

 

STAR_8

 

 

 

 

 

 

 

 

 

D

C

 

 

 

SW100A

 

 

 

 

 

2PCO

 

 

 

 

 

1

2

3

 

 

 

 

 

 

 

TP101

L SIG

 

 

 

PL100

 

 

 

 

 

R SIG

 

 

 

 

 

 

 

 

 

2 1

SK104B

TP102

 

 

 

 

 

 

 

1

 

 

 

 

SK102

SK104A

 

 

 

 

 

 

 

 

 

LS L

 

 

 

 

D100

 

SK106

1N4003F

 

1

 

 

2

 

0V_LS_L

3

 

 

4

 

LS R

AMPCT4

 

+49V

 

 

RLY100C

 

 

RLY101C

 

 

D101

 

 

 

 

 

 

 

 

RLY G5Z-2A-E

 

 

RLY G5Z-2A-E

 

 

 

 

 

 

 

 

 

 

1N4003F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C

FROM PREAMP

1

F

 

TP100

F

2

 

 

 

 

 

 

 

3

N EMC

 

 

 

4

C100 0V_SIG

N

AMPCT4

 

 

 

1N0 SM

 

 

PHONO4G

PHONO4G

 

PL101

 

 

 

 

0V_SIG

 

 

 

0V_SIG

2 1

 

 

 

 

 

 

 

4

5

6

 

 

SW100B

 

 

 

TR100

 

4

TP118

 

R103

SK107

BD179

 

5

 

1

 

SK105

2

 

 

330R 1W CF

2

 

 

 

TP119

R104

3

 

 

3

 

4

 

HPSKT

1

TP120

 

330R 1W CF

AMPCT4

 

6

 

R105

R106

 

 

 

 

 

 

7

 

100R 1W CF 100R 1W CF

 

 

TR101

BD179

R107

R108

220R SM

220R SM

 

R101

 

SPKR1 ON

 

100R SM

 

 

R102

 

SPKR2 ON

 

100R SM

 

2PCO

INTEGRATED / PRE-POWER MODE SELECT SWITCH

LS L

RLY100A

SK100A

RLY101A

SK100B

Top+

Bot+

 

 

TP111

TP113

TP115

 

 

 

RLY G5Z-2A-E

 

RLY G5Z-2A-E

 

0V_D

B

+5V_D

SK103

R100

+49V

 

110R MF

3

 

 

4

STANDBY

TP103

5

SPKR1 ON

TP104

6

SPKR2 ON

TP105

7

THERMPROT

TP106

8

VIPROT

TP107

9

DCPROT

TP108

10

AC PRESENT

TP109

11

TRIGGER

TP110

12

REMOTE

TP117

13

0V_D

 

14

 

 

FFC 14W 2.54MM VER

 

 

8K7014

 

 

0V_LS_L

 

 

 

 

 

 

Top-

 

Bot-

 

 

CAMCON_G

 

CAMCON_G

LS R

RLY100B

SK101A

RLY101B

SK101B

Top+

Bot+

 

 

 

 

 

TP112

 

TP114

 

TP116

 

RLY G5Z-2A-E

RLY G5Z-2A-E

0V_LS_R

 

 

 

 

 

 

Top-

 

Bot-

 

 

CAMCON_G

 

CAMCON_G

PCB

PCB

L882PB_4

EL

EARTH LEAD

8M101

EARTH LEAD

B

A

 

 

 

 

DRAWING TITLE

 

 

 

 

 

 

 

A85 amplifier and PSU - top sheet

 

 

 

 

23425

 

Circuit Diagram

 

 

 

 

 

 

 

 

 

 

Notes:

 

 

 

 

A & R Cambridge Ltd.

 

 

 

 

 

 

 

Pembroke Avenue

 

 

 

 

 

 

 

Denny Industrial Centre

 

 

 

 

 

 

 

Waterbeach

 

Filename

 

 

 

 

Cambridge CB5 9PB

 

 

 

 

 

 

L882C1_4.1.PRJ

 

 

 

 

 

 

 

 

1

2

3

4

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

02_E062

JBR

 

20/3/02

LDO REG FITTED TO IC201

 

 

4.1

 

 

 

 

 

 

 

 

 

 

 

02_E035

JBR

 

4/2/2002

FUSE VALUES UPRATED TO T4A

 

 

4.0

 

 

 

 

 

 

 

 

 

 

ECO No.

INITIALS

 

DATE

Drawn by:

DESCRIPTION OF CHANGE

 

ISSUE

 

Date Printed

 

 

 

Sheet 1 of 4

 

 

 

 

20-Mar-2002

 

DRAWING NO.

L882C1

 

 

 

J Reckless

6

 

 

 

 

7

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

A

Image 22
Contents A32 Contents List Phono Board L870 AV8 Phono Board Page L870 Phono Board Parts List Issue SK1 A85 Phono Stage TOP Level A85 Phono Stage Left Channel A85 Phono Stage Right Channel Amplifier + PSU Board L882 Amplifier & PSU Circuit Description Basic principle of operation is follows Page Page L882 Amplifier and PSU Board Parts List Issue Rectifier 1N4003F 1A Surface Mount HEX Schmitt Trigger L882 Amplifier and PSU Board Parts List Issue Relay G5Z-2A-E Thermistor Siemens B59008 A85 amplifier and PSU top sheet 23425 A85 amplifier power output stage left A85 amplifier power output stage right Display Board L928 CAM Products 2000TM L928PBB.GTO L928 Display Board Parts List Issue B.3 LED3 RX1 A32 FMJ Display PCB A32 FMJ AMP Display PCB Preamplifier Board L937 Pre-amplifier circuit description Page L937 Preamplifier Board Parts List Issue Diode SS SM BAV99W 3BS1D Rect S1D 1A 200V SM L937 Preamplifier Board Parts List Issue Relay Dpdt 5V SM NEC EB2-5NU USE Exclude NF When Using Runout Sheet Program Integrated amplifier preamp main signal path Integrated amplifier preamp power supply 3rd Channel Board L911 Page L911 3rd Channel Amplifier Board Parts List Issue RLY Spst 24V Spkr 4AFMMT597 Trans LF SS P SM FMMT597 AP85 third channel top level 23425 Transformer Specifications Page Page Mechanical Assembly A32 General Assembly Parts List E047rs2 Phono PCB Through Rear Panel P35 General Assembly Parts List E078rs2 P35/3 Channel General Assembly Parts List E079rs2 Arcam
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FMJ A32, P35/3, P35 specifications

The Arcam P35 is a high-performance power amplifier that has gained recognition among audiophiles and home theater enthusiasts alike for its exceptional sound quality and robust build. Designed to deliver superior audio performance, the P35 is a testament to Arcam’s commitment to engineering excellence and innovative technology.

One of the standout features of the Arcam P35 is its Class G amplification technology. This unique design offers the efficiency of Class D amplifiers while maintaining the warm, rich sound that Class A amplifiers are known for. By utilizing two sets of output transistors for different power levels, the P35 provides additional power when needed without compromising sound quality at lower volumes. This results in remarkably low distortion levels and an impressive dynamic range, making it suitable for everything from subtle acoustic tracks to explosive movie soundtracks.

The P35 is capable of delivering 120 watts per channel into 8 ohms, and an even more powerful 240 watts per channel into 4 ohms. Such power ensures that it can drive even the most demanding speakers with ease. Moreover, the amplifier features both balanced and unbalanced inputs, providing flexibility for various audio setups. The balanced XLR connections help to minimize noise and signal degradation for a clearer sound, particularly in professional settings.

In terms of build quality, the Arcam P35 boasts a robust chassis that minimizes resonance and vibration. The solid construction not only enhances durability but also contributes to an overall cleaner sound. The component selection is top-notch, utilizing high-quality capacitors and transistors designed to withstand the rigors of constant use while delivering exceptional audio fidelity.

An additional characteristic worth noting is Arcam's emphasis on user-friendly design. The P35 features a straightforward layout, allowing for easy setup and operation. It is also equipped with an LED status indicator that provides visual feedback on the amplifier's operational state.

Overall, the Arcam P35 is a powerful and sophisticated amplifier that excels in delivering an immersive audio experience. With its advanced Class G technology, versatile connectivity options, and exemplary build quality, the P35 stands out as an ideal choice for both stereo and home theater applications. Whether you're a casual listener or a serious audiophile, the Arcam P35 is sure to impress with its musicality and performance. Through meticulous engineering and attention to detail, Arcam has successfully created an amplifier that meets the high expectations of audio enthusiasts around the world.