Arcam A85 - Manuals

Arcam A85 – Manual in PDF format online.

Manuals:

Manual

Manual Arcam A85

Summary

Page 2 - Contents List

Contents List ! Contents list ! Circuit description ! Service guide ! Circuit diagrams ! Component overlays ! Circuit board parts list ! General assembly parts list

Page 3 - Pre-amplifier circuit description

Pre-amplifier circuit description The A85 preamplifier is a high-performance, DC coupled design with microprocessor control of input select, two independent tape loops, electronic volume control, tone bypass and electronic tone control. It features a discrete power supply and low-noise linear circui...

Page 4 - Amplifier & PSU Circuit Description

Amplifier & PSU Circuit Description L882PB is the printed circuit board that provides the power supply and output stage amplifiers for the A85 integrated and power amplifiers. Its function is to: 1. Drive the loudspeakers(!) 2. Provide an (always on) auxiliary 5VDC supply for the micro controlle...

Page 7 - The ground naming convention is as follows:

SK103 connects to the micro controller and display PCB. The 14 pin connector is numbered as follows: No Name Type Description 1 +5V_D O/P 5 volt digital supply (for micro) 2 0V_D O/P Digital ground 3 +49V O/P Main power supply for VFD (via fusible resistor) 4 STANDBY I/P Mains relay control signal (...

Page 9 - Fault Diagnostics; Fault Action

Fault Diagnostics Hints & Tips ! To check software version press PHONO, TUNER, DVD buttons on the front panel simultaneously. ! On issue 2 phono boards only, fit Kapton insulation tape to the phono stage PCB (rear panel end) to prevent track shorting to chassis. ! Check all fuses are the correct...

Page 10 - ISSUE; DRAWING TITLE; DATE; A85 amplifier and PSU - top sheet; J Reckless; INITIALS; Date Printed; Sheet; EMC; FROM PREAMP; PCB; EARTH LEAD

1 2 3 4 5 6 7 8 A B C D 8 7 6 5 4 3 2 1 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No. DESCRIPTION OF CHANGE L882C1_3.2.PRJ A & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PB A85 amplifier and PSU - top sheet Circuit Diagram L882C...

Page 11 - A85 amplifier - power supply and microcontroller interface

1 2 3 4 5 6 7 8 A B C D 8 7 6 5 4 3 2 1 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No. DESCRIPTION OF CHANGE L882C2_3.2.SCH A & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PB A85 amplifier - power supply and microcontroller interf...

Page 12 - A85 amplifier - power output stage left

1 2 3 4 5 6 7 8 A B C D 8 7 6 5 4 3 2 1 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No. DESCRIPTION OF CHANGE L882C3_3.2.SCH A & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PB A85 amplifier - power output stage left Circuit Diagram...

Page 13 - A85 amplifier - power output stage right

1 2 3 4 5 6 7 8 A B C D 8 7 6 5 4 3 2 1 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No. DESCRIPTION OF CHANGE L882C4_3.2.SCH A & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PB A85 amplifier - power output stage right Circuit Diagra...

Page 15 - Integrated amplifier preamp; JBR; USE EXCLUDE NF WHEN USING RUNOUT SHEET PROGRAM

1 2 3 4 A B C D 4 3 2 1 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No. DESCRIPTION OF CHANGE J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C1_1.0.PRJ A & R Cambridge Ltd.Pembroke AvenueDenny Industrial Centre...

Page 17 - Integrated amplifier preamp - power supply

1 2 3 4 A B C D 4 3 2 1 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No. DESCRIPTION OF CHANGE J:\Change_Control\ECO_AGENDA\01_E014 Fuse changes on A32 preamp\L937_1.1.ddb - Documents\Schematic\L937C3_1.0.SCH A & R Cambridge Ltd.Pembroke AvenueDenny Industrial Centre...

Page 18 - MARY AMP DISPLAY PCB; A85 DISPLAY PCB

1 2 3 4 5 6 7 8 A B C D 8 7 6 5 4 3 2 1 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No. DESCRIPTION OF CHANGE J:\Completed_Projects\A85 (Mary)\mary display\L865_2\l865_2.0 dbase.ddb - Documents\L865_2.0.PRJ A & R Cambridge Ltd.Pembroke Avenue Denny Industrial Centre...

Page 23 - AP85 third channel - top level

1 2 3 4 5 6 7 8 A B C D 8 7 6 5 4 3 2 1 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No. DESCRIPTION OF CHANGE J:\ECO_wip\01_1101 A85 RANGE PCB FUSES AND DC OFFSET\L911_1.1.DDB - Documents\L911C1_1.1.PRJ A & R Cambridge Ltd. Pembroke Avenue Denny Industrial CentreWat...

Page 33 - ARCAM; PCB Bill of Materials

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 1 of 3 (Excluding parts for NF.) Part Qty Iss Description Designators ******** PCB Finish items: ******** (For drawing office u...

Page 39 - Part Qty Iss Description Designators

ARCAM PCB Bill of Materials Document title: A85 / A32 Integrated amplifier preamp PCB Document number: L937RS Issue: 1 Revision: 1 ECO number: 01_E014 Date: 28/11/01 Created by: J Reckless Page 1 of 2 Part Qty Iss Description Designators 1A022 1 RES SM W4 1% 22R 1206 R185 1A047 6 RES SM W4 1% 47R 12...

Page 49 - A85 General Assembly Parts List

A85 General Assembly Parts List ITEM 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY A L813RC REMOTE CONTROL 1 B L907TX TRANSF A85 100V REPLACE 7A9301 AT TX200 TRANSFORMER FITTED ON PCB L865AY 1 ITEM 240V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY C12406 C12406 TBA T4AL FUSE FUSE &...

Page 50 - SILVER BLACK

A85 General Assembly Parts List ITEM 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY HA6K60A TRANSBOLT 1 HF4V09B No. 4 x 9mm SCREW REAR & MODULES 17 HJ4A00A M4 NUT RR PAN ‘E’ EARTH 1 HJ4C00D M4 WAISTED NUT RR PAN ‘E’ EARTH 1 HL4SA WASHER 3 HL4SB M4 SHAKE PROOF RR PAN ‘E’ EARTH 1 HL5EB M5 ...

Page 51 - P85 General Assembly; DESCRIPTION

P85 General Assembly ITEM 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY 5B483028 HOLTEK PLUS L819SW Z1 of L910AY 1 8K004 JUMPER SOCKET 0.1" M7571-05 2 8K006 CONNECTOR 14MM SHORTING BAR P2148 1 C12406 C12406 TBA FUSE T4AT FUSE & SPARE FUSE HOLDER 2 E031AY REAR PANEL ASSEMBLY 1 E804HK...

Page 52 - SILVER BLACK

P85 General Assembly ITEM 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY L884TX L884TX L880TX A85P TRANSFORMER 1 L910AY SWITCH PCB 1 L915CA CABLE FFC 0.1" 14WAY A85 DISP - PWR 1 E834CP E833CP COVER PLATE 1 E974AY E990AY FACIA ASSY 1 HA4V06S HA4V06B M4 X 6mm SCREW 4

Page 53 - P85/3 General Assembly

P85/3 General Assembly ITEM 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY 5B483028 PIC CHIP + L819SW 1 8K004 2 W AY JUMPER SKT 2 8K006 CONNECTOR 14MM SNORTING BAR P2148 1 C12406 C12406 TBA FUSE 20MM 4AT FUSE & SPARE FUSE HOLDER 2 E031AY REAR PANEL ASSEMBLY 1 E804HK HEAT-SINK 1 E804MI MA...