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.comProduct information
Technical downloads
Distribution contacts
Company contacts
Technical support support@allen-heath.com
See web for local contact
RPS14 User Guide AP5716 Operating instructions
Performance specification
Manufactured in the United Kingdom by Allen & Heath
Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK
http://www.allen-heath.com
2rps14_ap5717_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.
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.
The following list identifies historical changes to the RPS14. The effective dates, serial numbers and
related change note documentation are included for reference to help identify the correct issue circuit
boards and components. 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.
* Fuse F5 = 10A for 100-120V AC operation, 8A for 220-240V AC operation
** Changes to the transformer wiring were made when the main PCB was up-issued form AG5554_C to AG5554_1. If ordering a replacement transformer, be sure to check
and quote the PCB issue number (printed on the board).
rps14_layout_1.doc Sheet 1 of 1
RPS14
AL3893
CONSOLE PSU
AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR.
CAUTION: FOR CONTINUED PROT ECTION AGAINST RISK OF FIRE REPLACE FUSE
WITH SAME TYPE AND RATING. DISCONNECT SUPPLY BEFORE CHANGING FUSE.
ATTENTION: REMPLACER LE FUSIBLE AVEC UN DES MEMES CARACTERISTIQUES.
COUPER L'ALIMENTATION AVANT DE CHANGER LE FUSIBLE.
V AC ~ 47- 63 Hz
525W MAX
S/No
MADE IN ENGLAND
M3x10 SCREW AB0076
RPS14 Surface Parts
HI TEMP
RED LEDAE0086
CAUTION
MAINS IEC AL3179 80MM 12V FAN AM4474
+/-17V
MAINS INPUT
+12V
GREEN LED AE0085
DO NOT OBSTRUCT VENTILATION OPENINGS.
DO NOT OPEN. NO USER SERVICEABLE PARTS INSIDE.
THIS APPARATUS MUST BE EARTHED BY THE POWER CORD.
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
+48V
2BA TERMINAL POST AL8106M4x8 SCREWAB0332
FUSE
T10A L 250V 20mm
T8A L 250V 20mm 220-240V~
FUSE HOLDER AL3178
8A FUSE AL0487 or
10A FUSE AL3455
On leaving the factory, the RPS14 power supply unit will be wired to operate at one of four different mains
voltage ranges, depending on its destination:
Mains Input Voltage Range:
100V AC +/- 10% 50/60Hz
120V AC +/- 10% 50/60Hz
220V AC +/- 10% 50/60Hz
240V AC +/- 10% 50/60Hz
It is possible to reconfigure the RPS14 to operate from a different voltage range. It may be necessary to do this
if the unit is to be used in a different part of the world. See overleaf for the possible settings.
The procedure involves removing the unit’s cover and re-positioning leads connected to the transformer’s
primary winding.
Due to the hazardous nature of the mains voltages exposed when opening the unit, this work should be carried
out only by technically competent personnel. If you are not sure or require further assistance, please contact
Allen & Heath technical support (see www.allen-heath.com
for contact details).
IMPORTANT
to the equipment not approved by Allen & Heath
could void the compliance of the equipment.
Whilst we believe the information in these
instructions 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.
This work should be carried out only by
qualified technical personnel authorised by
Allen & Heath.
Disconnect the mains power cord before
opening the unit.
Take care not to damage the panels or
internal assemblies during fitting. Prevent loose
parts or dirt from entering the unit as this may
cause equipment failure.
Procedure
Step 1: Preparation
Ensure the unit is powered off. Disconnect the mains power lead and console DC cables. Remove the unit from
its rack or other furniture and place on the work surface.
Step 2: Remove the cover
Remove the eight T10 Torx (star head) screws and lift off the cover.
REMOVE 4x SCREWS
RPS14 Mains Voltage Setting 1
REMOVE 2x SCREWS
PER SIDE
Step 3: Change the voltage setting
Locate the mains inlet PCB. An issue 1 board is shown here – some early RPS14s were fitted with an issue C
PCB – please consult Allen & Heath technical support for information on changing the voltage setting for the
issue C units.
The mains voltage setting is selected by connecting the
appropriate transformer primary lead to the LIVETX terminal
on the PCB. The terminals PARK1 to PARK5 are not
connected to any circuits – they are simply used to store the
unused leads safely.
Select the correct lead for your required mains voltage by
referring to the table, and then swap its position with the
lead currently connected to the LIVETX terminal. The unit is
now set to operate at the new mains voltage, and the
previously used primary lead is safely stored on a PARK
terminal. If in any doubt about the mains voltage for your
area, contact your electricity supplier.
AC Mains Voltage Lead Colour
240 Brown
230 Violet
220 Red
120 Black
100 Grey
90 Orange
Step 4: Check the fuse rating
It may be necessary to change the mains fuse to suit the new mains voltage – see the following table:
AC~ mains input voltage Fuse type
100V – 120V ± 10%
220V – 240V ± 10%
T 10A L 250V 20mm
T 8A L 250V 20mm
The mains fuse is located on the rear of the RPS14 unit next to the MAINS INPUT connector. Switch off the
power supply and remove the mains lead plug from the MAINS INPUT socket. Check the fuse and replace with
one of the correct type if necessary
Step 5: Refit the cover
Check your work carefully, making sure the leads are properly seated on the terminals. Ensure that there is no
dirt or debris inside the unit. Replace the cover and secure with the 8x Torx screws.
The unit should be clearly re-labelled with the new operating voltage.
Step 6: Test
Connect the unit to a mains supply at the new voltage. Power up and check for correct operation.
2 RPS14 Mains Voltage Setting
ALLEN&HEATH RPS14 Transformer Wiring Details
RPS14 Transformer – A&H Part No. AM5702 Iss.2 Date 12/05/04
This transformer (Allen & Heath part no. AM5702, iss.2) is suitable for use with RPS14 units using
issue 1 / 1.1 main PCBs. Some early RPS14s were produced using an issue C main PCB. The
AM5702 iss.2 may be adapted for use with an issue C unit should a replacement be needed.
Please contact Allen & Heath technical support for advice on this matter.
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