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E5/G5 EPIRB
EPIRB EPIRB
EPIRB
Service Manual
Service ManualService Manual
Service Manual
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Smartfind EPIRB service manual Page 1
Table of Contents
1. Introduction ..........................................................................................................3
1.1. Scope..............................................................................................................3
1.2. Applicability .....................................................................................................3
1.3. Servicing equipment .......................................................................................4
1.4. Safety notices .................................................................................................5
1.5. alse alarms ...................................................................................................7
2. Assessment ..........................................................................................................9
2.1. Maintenance tasks..........................................................................................9
2.2. Routine testing ................................................................................................9
2.3. Assessment ..................................................................................................10
3. Maintenance procedures...................................................................................12
3.1. Inspection......................................................................................................12
3.2. unctional test...............................................................................................14
3.3. Message read ...............................................................................................17
3.4. Internal inspection.........................................................................................18
3.5. Disassembly..................................................................................................19
3.6. Re-assembly .................................................................................................22
3.7. Leak testing...................................................................................................25
3.8. Battery change..............................................................................................26
3.9. Reset the Run Time counters on the PCB ...................................................28
3.10. HRU replacement......................................................................................29
3.11. Programming.............................................................................................30
. Fault finding........................................................................................................32
5. Repair procedures .............................................................................................35
6. Spares .................................................................................................................36
Appendix 1 : Specification .......................................................................................37
Appendix 2 : IMO recommendations.......................................................................37
Disclaimer
McMurdo is a brand name operated by Signature Industries Limited.
The information and illustrations contained in this publication are to the best of our knowledge correct
at the time of going to print. We reserve the right to change specifications, equipment, installation and
maintenance instructions without notice as part of our policy of continuous product development and
improvement. No part of this publication may be reproduced, stored in a retrieval system or
transmitted in any form, electronic or otherwise without permission in writing from McMurdo, Signature
Industries Limited. No liability can be accepted for any inaccuracies or omissions in the publication,
although every care has been taken to make it as complete and accurate as possible.
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1. INTRODUCTION
The Emergency Position Indicating Radio Beacon (EPIRB) is a device used to alert
search and rescue services in the event of an emergency. It activates via a sea water
switch whilst floating in the sea. The EPIRB contains the following functions:
406MHz transmitter A powerful 5 Watt transmission is encoded with either
a unique serial number or the vessel’s call sign / MMSI.
The signal is relayed via satellite to the rescue centre.
121.5MHz transmitter A low power transmission is amplitude modulated with
a swept audio tone and acts as a homing beacon. When the
rescue services get close this allows them to direction find on
the signal.
lashing light (strobe) A bright light flashes every 2.6 seconds as a visual aid
during the last stage of rescue.
Buzzer Audible alarm/indicator
GPS receiver (optional) The module receives and decodes the Global Positioning
System signals from a satellite network and computes the
position of the EPIRB.
The vessels flag state and the vessel identity or unit serial number is programmed into the
EPIRB as part of the 406MHz transmission, thus making the EPIRB unique. Transferring an
EPIRB to another vessel either involves re-programming, or re-registration.
The product is non-hazardous for transportation.
It is available with either a carry-safe manual bracket or auto release cover.
1.1. Scope
This manual provides the instructions to enable routine and emergency servicing of the
EPIRB equipment listed below. This manual represents the original equipment
manufacturer’s (OEM) service documentation applicable to these products.
Shore based maintenance procedures (in accordance with IMO Circ 1039) is covered in
82-1039 and annual inspection (in accordance with IMO Circ 1040) is covered in 82-
1040.
1.2. Applicability
This manual applies to the following 406MHz EPIRB equipment:
• McMurdo Smartfind Plus or G5 GPS
• McMurdo Smartfind or E5 Non-GPS
• Sailor SGE406-II GPS
• Sailor SE406-II Non-GPS
• Simrad EG50 GPS
• Simrad EP50 Non-GPS
Units without integral GPS have serial numbers beginning with 100.
Units with integral GPS have serial numbers beginning with 200.
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Smartfind EPIRB service manual Page 4
1.3. Servicing equipment
The following tools and equipment is required to carry out the servicing detailed in this
procedure.
Equipment:
Message reader
Screened box
Leak testing equipment (SBM testing only)
GPS repeater (SBM testing only)
Static-safe work area with operator wrist strap
Multimeter with voltage and resistance scales
Programming kit :
82-950A Light pen
82-951A EPROG5 (McMurdo variant)
Bar magnet or manual bracket with incorporated magnet
Shorting link for sea switches
Battery discharge load (made on-site as required)
Handtools:
Calibrated torque driver (0.6 Nm) with attachments:
7mm A/ socket (M4)
Small cross-headed screwdriver
Large cross-headed screwdriver
Antistatic precautions
The electronics section of the EPIRB is sensitive to electrostatic discharge (ESD) which
can cause immediate or hidden long term damage. It is important that the PCB is only
handled under suitable antistatic conditions.
Ideally, a fully grounded workstation, which has conductive surfaces to avoid the build up
of static charge, should be used.
As a minimum, the operator must be connected to a good earth point through a
resistance of 1Mohm. This is usually achieved by wearing a suitable wrist strap.
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1. . Safety notices
Please read the following information for your safety:
This product has been assessed as presenting negligible hazard in a sealed serviceable
state.
Safety analysis
The following table summarises the nature of the hazard which may be present when the
unit is opened or serviced; each hazard is discussed at greater length in the detailed
sections.
Hazard cause Hazard identification Precautions
Lithium battery Explosive risk, corrosive fumes,
fire, biological hazard
Handle appropriately, avoid
contact
Strobe Bright light Avoid staring at light
Radio frequency
radiation
Physiological hazard Avoid close or prolonged
exposure. Do not touch the
antenna during 406MHz
transmissions
IPA Irritation, highly flammable Avoid contact, ventilate well
Lithium batteries
Hazardous chemicals Wear gloves
The batteries used in these products contain Lithium (Li). Lithium is flammable, reacts
violently with water and constitutes a biological hazard. These batteries are hazardous if
short-circuited, punctured, incinerated or deformed.
Lithium batteries must not be short circuited.
Lithium batteries must be handled, transported and disposed of using appropriate safety
precautions. The use of rubber gloves as a routine precaution is recommended.
In the event of leakage of the battery electrolyte (which can be recognised by a pungent
odour), take care to avoid contact, particularly with open wounds; do not ingest the
material. Do not attempt to discharge a leaking battery – remove it using appropriate
handling materials and seal in a plastic bag, then dispose of it through an approved
environmental disposal agent, or in accordance with local regulations.
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Strobe radiation
The strobe lights fitted to EPIRBs produce intense flashes of light. No damage is likely to
be caused by intermittent exposure, but prolonged exposure should be avoided.
Radio frequency radiation
An EPIRB produces radio frequency radiation when it is activated. The
radiated level is below 13W with a duty cycle of 1%. Due to the low
duty cycle this is not considered to be a hazard; however, it is
advisable to avoid touching the antenna of a transmitting EPIRB.
General precautions for chemical agents (adhesives, greases, IPA)
Observe all safety precautions relevant to the country of operation. As a general rule,
protective overalls, gloves and goggles should be worn when handling these chemical
agents, but different countries may have additional requirements which must be
observed.
Ensure that all chemical agents are handled in accordance with the manufacturer's
instructions, and that suitable protective clothing is worn.
Make sure that the working area is well ventilated, and that chemical substances are not
left exposed. Observe good hygiene practices; do not eat, drink or smoke when handling
chemicals.
Read the manufacturer's instructions before using any chemical agent.
Wear goggles Wear overalls Wash hands Wear gloves
Radio frequency
radiation
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Smartfind EPIRB service manual Page 7
1.5. False alarms
Every care must be taken to avoid the generation of false alarms.
Modern EPIRBs are activated by sea switches. The mounting bracket (both Autocover
and Manual) incorporates a magnet to disable the sea switch. However, if the EPIRB is
wrongly fitted the magnet will fail to disable the sea switch, so water may activate the
EPIRB. To prevent this, simply ensure that the EPIRB is correctly fitted.
or test purposes the EPIRB may be operated in the following ways without generating
a false alarm:
1. Self test mode (but avoid repetitive self tests)
2. Live mode for less than 50 seconds (after 50s a live transmission is made)
3. Live mode in a screened enclosure
If for any reason the EPIRB is activated outside a screened enclosure (other than as a
self test) for more than 50 seconds, it must be assumed that a false alarm has been
generated. If this occurs:
1. Deactivate the EPIRB (see below).
2. The rescue services must be informed that there has been a false alarm. Use any
means available to contact the coastguard or the nearest Maritime Rescue
Coordination Centre (MRCC); state that there has probably been a false alarm,
identify the location of the EPIRB and if possible give the EPIRB ID.
De-activating a live EPIRB
Remove the EPIRB from any water and dry the outside. Wait about 8 seconds for the unit
to de-activate automatically.
If it fails to deactivate ensure that the activation switch is fully off (slide to right).
If the EPIRB continues to transmit, it may have a fault. To prevent further nuisance, it is
recommended that the unit is allowed to exhaust its battery whilst the alarm signals are
suppressed. The recommended procedure is:
1. Cut off the antenna.
2. Place EPIRB in a metal enclosure, or wrap in metal foil.
3. Leave for three days until the battery is exhausted.
If it is absolutely necessary to fully disable the EPIRB (by unplugging the battery) then
please see the relevant section of this manual.
NOTE: All EPIRBs (even ‘unprogrammed’ ones) will transmit.
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