Allen&Heath RPS14 User 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/

RPS14

Linear Console Power Supply

SERVICE INFORMATION

Publication AP5717

Introduction

This publication provides technical information on servicing the Allen & Heath RPS14 Linear
Console Power Supply. Included are internal layout drawing and circuit schematics with board
layouts and spare parts information. 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 [e-mail]

See web for local contact

RPS14 User Guide AP5716 Operating instructions
Performance specification

RPS14 Service Information

Issue status: rps14_ap5717_1.doc

Print date: 07 January 2005

Copyright © 2005 Allen & Heath. All rights reserved

Manufactured in the United Kingdom by Allen & Heath

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

http://www.allen-heath.com

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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.

rps14_ap5717_1.doc 3

Servicing Notes – RPS14

User maintenance: There are no user serviceable parts inside the unit. It should be serviced by

suitably qualified personnel only.

Technology:

The RPS14 uses conventional thru-hole PCB technology.

Operation:

The RPS14 can be set to operate at a different mains voltage by performing

See document rps14_mains_voltage_setting.pdf for details.

To test the Power Supply Unit, make sure it is connected as described in the

user guide. Check that the voltage setting marked on the rear panel is
correct for the local mains supply.

an internal wiring modification.

Fault Finding

Should the Power Supply Unit fail to work correctly, check the following components first:

Mains Fuse

The AC mains fuse is located on the rear of the RPS14 unit next to the AC mains connector. In the event of a
mains surge or under-rated fuse value, the fuse will rupture. Switch off the power supply and remove the mains
lead plug from the “MAINS INPUT” socket on the rear of the unit. Check the fuse and replace if necessary.

TO AVOID THE RISK OF FIRE REPLACE FUSE WITH THE CORRECT TYPE ONLY, AS INDICATED

ON THE UNIT.

AC~ mains input voltage Fuse type

100V – 120V ± 10%

220V – 240V ± 10%

T 10A 250V 20mm

T 8A 250V 20mm

Internal DC Rail Fuses

Each DC supply rail (+17V, -17V, +12V and +48V) is protected by its own fuse. These fuses are mounted on
the main PCB. See the internal layout drawing for the locations, values and part numbers of these fuses. Check
these fuses to see if any have blown.

Cooling Fan

Check that the cooling fan is operating correctly, and that the ventilation holes are not blocked with dust or other
debris which could cause the unit to overheat and stop working. Note that if the RPS14 is suffering an
overheating problem, firstly the “HI TEMP” LED on the front panel will illuminate, then the unit will enter “protect”
mode and shut off the supply. Clear any dust from the ventilation holes using a vacuum cleaner and dry, lint
free cloth. Do not use liquid cleaners or compressed air to clean the unit. If the fan is not operating correctly or
if it becomes noisy it must be replaced.

Transformer

A non-functioning power supply unit may be caused by a failed transformer. Refer the transformer wiring
information in document rps14_transformer_2.pdf and check that the correct secondary voltages are reaching
the main PCB.

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Contents Log

Internal Layout drawing ..................................................rps14_layout_1.pdf

Surface and Main Parts.................................................... rps14_parts_1.pdf

Main PCB ...........................................................rps14_003-253_main_c.pdf

.........................................................................rps14_003-253_main_1.1.pdf

Transformer Wiring Information .............................rps14_transformer_2.pdf

Mains Voltage Setting .............................. rps14_mains_voltage_setting.pdf

Engineering Change Notes ..............................................rps14_ecns_1.pdf

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