Allen & Heath XONE VF-1 Service Manual

ALLEN&HEATH

WARNING – HIGH VOLTAGES

Power Supply Unit (PSU) work should only

be carried out by qualified personnel.

We recommend that you use an approved Allen & Heath

service centre for all power supply work.

Please contact your local Allen & Heath distributor for more details.

http://www.allen-heath.com/

SERVICE INFORMATION

Publication AP6047

Introduction

This publication provides technical information on servicing the Allen & Heath XONE VF-1 Analogue Filter unit. Included are internal layout drawings, block diagrams and circuit schematics with board layouts. Whilst we believe this information to be reliable we do not assume responsibility for inaccuracies. We also reserve the right to make changes in the interest of further product development.

Additional Resources

Allen & Heath web site www.allen-heath.com Product information Technical downloads Distribution contacts Company contacts

Technical support support@allen-heath.com

See web for local contact

XONE VF-1 user guide AP5917 Operating instructions Performance specification

XONE VF-1 Service Information

Issue status: xonevf-1_ap6047_1.doc

Print date: 07 December 2004

Manufactured in the United Kingdom by Allen & Heath

Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK

http://www.allen-heath.com

2 xonevf-1_ap6047_1.doc

Servicing Precautions – General Notes

Service personnel: Service work should be carried out by technically qualified service personnel only.

Mains power is dangerous and can kill. Do not attempt to work on a linear or switched mode power supply if you are not suitably qualified to do so. Do not attempt to repair surface mount circuit assemblies unless you are suitably qualified and have the necessary facilities to do so. Replacement circuit assemblies can be ordered.

Service facilities: Ensure a suitably sized work surface is available. Ensure this is clear of dirt, debris

and obstructions which may damage the equipment surfaces. Ensure adequate lighting. Use the correct tools for the job and ensure they are in good working order. Ensure all workshop safety requirements are adhered to.

Service information: Check that you have all the information you need before starting the service job. Refer

to the Allen & Heath web site or contact Allen & Heath technical support for details on the latest information. Full technical information can be downloaded from the web site Distributor Zone (password required).

Mains power: Connect the equipment to mains power only of the type described in the user guide

and marked on the rear panel. The power source must provide a good ground connection. Ensure you always use an isolation transformer when working on any mains power supply unit.

Mains cord and fuse: Use the correct power cord as supplied with the equipment. Do not remove or tamper

with the ground connection in the power cord. Heed the Important Mains Plug Wiring Instructions printed in the user guide if it is necessary to rewire the mains cord. Always replace the equipment mains fuse with the correct type and rating as described in the user guide and marked on the equipment panel.

Opening the unit: Switch off and remove the mains power cord before opening the equipment. Ensure

all power supply covers and safety shields are in place before applying power with the unit open for diagnostic fault finding.

Closing the unit: Before finishing, check the quality and accuracy of the service work carried out.

Remove any dirt or debris as this may cause equipment failure in the future. Ensure all assemblies, harnesses and connectors are correctly aligned and plugged in. Ensure that jumper settings and control configurations are correctly set according to the requirements of the customer.

Testing the unit: Before operating the equipment, read and adhere to the Important Safety Instructions

printed in the user guide. Test that the service work has been successfully carried out.

Shipping the unit: Use adequate packing such as the original packaging or purpose designed flight case

if you need to ship the unit. To avoid injury to yourself or damage to the equipment take care when lifting, moving or carrying the equipment.

Servicing Notes – XONE VF-1

User maintenance: There are no user serviceable parts inside. Refer any service work to competent

technical personnel only.

Technology: The XONE VF-1 uses SMT (surface mount) PCB technology. In certain cases it may

be better to replace a faulty assembly rather than try to fix it without the appropriate tools and training. The power supply is a built-in universal mains input, switched mode circuit which should be serviced by suitably qualified personnel only.

Operation: The XONE VF-1 is an analogue filter unit. To ensure optimum performance and

reliability it should be connected and operated as described in the user guide.

Fault finding: Refer to the system block diagram and circuit drawings to follow through the signal

path during fault diagnosis. Replace suspected faulty components only with those specified by Allen & Heath. The use of lower grade alternatives may degrade the performance.

xonevf-1_ap6047_1.doc

Contents Log

Internal Layout Drawing .............................................xonevf-1_layout_1.pdf

Surface and Main Parts................................................xonevf-1_parts_1.pdf

System Block Diagram ................................. xonevf-1_blockdiagram_1.pdf

Main PCB Assembly iss.1 .............................xonevf-1_003-358_main_1.pdf

Main PCB Assembly iss.4 .............................xonevf-1_003-358_main_4.pdf

RIAA Option PCB ............................................ xonevf-1_003-360_riaa_a.pdf

RIAA Option Fitting Instructions ......................... xonevf-1_riaa_fitting_1.pdf

4 xonevf-1_ap6047_1.doc

Product .........................XONE:VF-1/120

.....................................XONE:VF-1/220

.....................................XONE:VF-1/240

.................................. XONE:VF-1R/120

.................................. XONE:VF-1R/220

.................................. XONE:VF-1R/240

Main Assembly ......................... 003-357

PCB Assembly ......................... 003-358

Pack Assembly......................... 003-359

RIAA Option PCB Assy ............ 003-360

Valve ECC82 ............................AE5139

CN12

CN16

CN7CN8 CN9

SW10

CN2CN3 CN4

CN1

CN5

123

SW1

RIAA OPTION

VALVE ECC82 AE5139

LD1LD2LD3

LD4LD5LD6

FH1 FH2

PCB ASSY

003-358

CN10

321

CN6

CN17

SW5

PIC SKT

CN13CN14

WARNING HIGH VOLTAGE!

SW8

SW7

SW9

NTC1

TX1

CN15

C117

BR1

R207

C113C114 C115

SW6

SW2

VR1 VR2

LD8

SW4

VR3

SW3

VR4 VR6

VR5

LD9

LD12

LP4

LD11

LD7

LD10

LD13

LD14

LP1 LP2 LP3

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