GME MT400 Betriebsanleitung

TECHNICAL SERVICE

MANUAL

406MHz COSPAS-SARSAT Emergency Beacon,

MT400 Series EPIRB

Order Part Number: 310433

Drawing Number: 42772

Issue: 6

Status: Released

Date: 09-JUL-2018

Change History: 8235

17 Gibbon Road, Winston Hills NSW 2153, Australia

ABN: 93 000 346 814

gme.net.au

GME Pty Ltd

This document and the information contained

herein is the property of GME Pty Ltd. It may

not be copied, used or disclosed in whole or

in part except with prior permission of GME

Pty Ltd. It is supplied without liability for

errors or omissions.

2 TECHNICAL SERVICE MANUAL

APPLICABILITY

This document applies to the following models:

• MT400 [manually activated EPIRB, LiSO batteries]

• MT401 [manually & water activated EPIRB, LiSO batteries]

• MT403 [manually & water activated EPIRB, LiMnO batteries]

• MT403G [manually & water activated EPIRB + integral GPS, LiMnO batteries]

• MT401FF [ﬂoat-free EPIRB, LiSO batteries]

• MT403FF [ﬂoat-free EPIRB, LiMnO batteries]

• MT403FG [ﬂoat-free EPIRB + integral GPS, LiMnO batteries]

SCOPE

Service Department level maintenance is outlined within this document. A suitable skill level is

assumed, as is access to common electronic and mechanical tools.

The scope of this document is limited to servicing and repair in any one or more of these cases:

• Inspection and performance check,

• Battery replacement, typically due to use or life expiry,

• Replacement of physical parts which may have been damaged or have deteriorated to a

point of no longer being serviceable,

• Exchange of a printed circuit card assembly that has failed in a manner not covered by the

product warranty (i.e. a non-electrical failure due to leakage or physical damage only).

NOTE:Repair of the printed circuit card assembly is not possible at the distributor level;

replacement of components is likely to affect module calibration. Specialist ﬁxtures and facilities

only available at the factory are required to perform a module alignment after any repair

operation.

Additional servicing requirements may be imposed by other organisations and authorities on

particular users and installations (e.g. IMO/Circ. 1039). Such requirements are outside the scope

of this document and it is the responsibility of the agent carrying out the inspection and/or

service to determine which if any may apply. These requirements where applicable are always in

addition to, and do not replace, any of the requirements speciﬁed within this document.

ASSOCIATED DOCUMENTS

Reference to additional internal and external material may be required to complete some of the

operations detailed within this manual.

Furthermore, from time to time Technical Service Bulletins (TSBs) may also be released. These

bulletins contain information, which may be important to the continued service of speciﬁc

beacons, and the instructions contained therein must be followed.

It is possible to regularly verify the issue status and download as necessary new document

releases including TSBs via the support area on GME’s website. Always work with the latest

versions of this and other documentation.

GME’s home page web address is: www.gme.net.au

As information access is limited to approved organisations, distributors and dealers, you must

ﬁrst apply for an account login. You can do this online from the SUPPORT page.

TECHNICAL SERVICE MANUAL 3

PRODUCT MAINTENANCE & SERVICE

4.1 INTRODUCTION

A number of service actions are identiﬁed within this manual, more than one may be applicable

at any beacon service. Please familiarise yourself with all available service actions to ensure that

a complete service is carried out.

Only manufacturer-authorised spares and components are approved for use in carrying out the

service operations contained here-in.

Access to a range of service tools is assumed. Particular specialised tools are listed in Table 6-5).

A dry, pressurised air source is required for leak testing.

4.1.1 MODEL VARIANTS

Please be aware the pictorial representations shown in a particular service operation step

may not always precisely depict all model variants or build revisions. In situations where this

detail discrepancy is important to the actions being described, it shall be addressed by a note,

alternate picture, or both.

4.2 BATTERY SERVICE KITS

These illustrations show the contents of the battery service kits.

The images show the batteries separate but the kits will be delivered with batteries ﬁtted inside

the lower chassis.

For reasons of economy, the service kit is delivered with both coloured covers and both types of

switch slider track. Ensure that you use the one appropriate to your product.

4.2.1 MT400 SERIES BATTERY SERVICE KIT

These illustrations show the contents of the battery service kits.

The images show the batteries separate but the kits will be delivered with batteries ﬁtted inside

the lower chassis.

For reasons of economy, the service kit is delivered with both coloured covers and both types of

switch slider track. Ensure that you use the one appropriate to your product.

Orange

activation

cover, MT401

slider track,

Slide switch,

MT400 slider

track, Yellow

activation

cover

Cap

4 screws for

securing the cap

to the chassis

Spring

Washer

Retention Nut

O-ring Seal

Antenna

O-ring Seal

Battery

Security seal,

Desiccant, Leak test

point screw (pan

head), Retention

screw (countersunk)

4 TECHNICAL SERVICE MANUAL

4.2.2 MT401 SERIES BATTERY SERVICE KIT

Part names are as for the MT400 series battery service kit, see above at Section 4.2.1.

4.2.3 MT403 SERIES BATTERY SERVICE KIT

Part names are as for the MT400 series battery service kit, see above at Section 4.2.1.

TECHNICAL SERVICE MANUAL 5

4.3 REPAIR MATRIX

The sequence of operations for each service type is given within Table 4-1. Multiple service types

may be combined provided the sequence of operations is maintained.

Para. Operation/ Nature of service Routine

inspection

Battery

Replace-

ment

External

Repair of

Fault

4.4.1 Inspection   

4.4.2 External Switch Mechanism x x 

4.4.3 Chassis Disassembly / Assembly,

including battery replacement xx

4.4.4 Cap Disassembly / Assembly x x x

4.4.5 Replacement of Desiccant Sachet xx

4.4.6 Leak Test   

4.4.7 Security Seal Replacement   

4.4.8 Reprogramming User Information xx

4.4.9 External Labelling Replacement /

Update   

4.4.10 Produce Beacon Record   

4.4.11 Transmission Test and Report   

4.4.12 Packing for Return to Customer   

KEY

This operation must be carried out

May be required depending on circumstances, refer to test criteria

xNot required.

4.4 SERVICING OPERATIONS

4.4.1 INSPECTION

This operation is carried out to determine whether the beacon has suffered from physical

or environmental abuse that will require rectiﬁcation prior to its return into service. Correct

electrical operation of the EPIRB is assessed.

1. Carry out the inspections as outlined with the Emergency Beacon, Inspection Proforma

Drawing No. 42341.

2. Complete the form, noting all failures.

6 TECHNICAL SERVICE MANUAL

4.4.2 EXTERNAL SWITCH MECHANISM

This operation is carried out when:

• Access to the sealing screw is required.

• The switch mechanism or switch cover needs to be replaced.

Disassembly

For disassembly each step is to be completed in numerical order as follows:

1. Move the beacon activation switch to the ON position.

Note: IMMEDIATELY move on to and complete the next step.

2. Remove the screw and then the slider track completely from the beacon.

Assembly

To re-assemble and/or replace components each step is to be completed in numerical order as

follows:

1. Push the switch slider on to a slider track appropriate to the beacon model type.

MT400 type has

‘OFF’

Leave this hole

exposed when ﬁtting

the switch slider

MT401type

has ‘READY’

2. Locate the switch and switch slider track so that the tongue provided on that track engages

into the slot provided at the front of the beacon cap. Place and then hold in position the

switch cover of the type appropriate to the beacon model type as shown.

WARNING: At this point, the switch is on. You must complete the next steps within 45 seconds

to avoid a live transmission.

Yellow switch covers are ﬁtted to yellow

coloured beacons

Orange switch covers are ﬁtted to orange

coloured beacons

TECHNICAL SERVICE MANUAL 7

3. Place and tighten the countersunk retention screw to a torque of 50 cN·m ± 5 cN·m.

4. Move the slider switch to the OFF or READY position.

WARNING: You must do this within 45 seconds to avoid a live transmission.

5. Close the switch cover.

4.4.3 CHASSIS DISASSEMBLY / ASSEMBLY, INCLUDING BATTERY REPLACEMENT

This operation is carried out in any of these cases:

• Internal access to the beacon is required

• A mechanical repair requires the EPIRB cap and chassis to be separated.

• The battery requires replacement

The EPIRB battery should be replaced when any of the following is evident or has occurred:

• The battery has reached (or exceeded) its expiry date or would otherwise reach its expiry in

the near term,

• The beacon has been activated or is suspected of having been activated, and/or

• The battery pack has failed or is considered suspect.

WARNING: Always use the correct battery service kit.

• MT400BAT is for use only with MT400

• MT401BAT is for use only with MT401

• MT403BAT is for use only with MT403

To carry out the replacement you will need the applicable battery service kit; these kits include

battery pack, cap, chassis, ballast and miscellaneous items. See 4.2, Battery service kits, starting

on page 6.

Disassembly

For disassembly, each step is to be completed in numerical order as follows:

1. Ensure that you are using an antistatic mat and wearing the wrist strap.

CAUTION: This equipment contains static-sensitive componentry. Handling precautions are

required and an antistatic wrist strap must be worn.

8 TECHNICAL SERVICE MANUAL

2. Using a PH1 Phillips screwdriver, remove all four screws that retain the EPIRB cap to the

lower chassis. Discard the screws .

3. Firmly grasp the cap with one hand (not by the antenna), and the lower chassis with the

other hand, and fully separate them. The ﬁt is reasonably tight and it may sometimes be

necessary to rock the two components in respect to each other to initiate the separation

process.

In extreme cases, apply air pressure to the leak test point to separate the cap from the lower

chassis. (Refer to 4.4.6, Leak Test.)

For water activation models the water sensor interface on the circuit board may momentarily

touch the metallic paint on the lower chassis during withdrawal, causing a beacon self test

operation to occur. The unit “may “beep” for 4–5 seconds.

WARNING: (Water Activated Models): If the cap and lower chassis are left only partially

separated sensor interface contact with the lower chassis may cause the beacon to activate after

50 seconds.

4. Extract the O-ring seal from the groove around the cap and discard it.

5. Disconnect the battery’s ﬂy lead from the printed circuit board (PCB) by ﬁrst squeezing the

latch release lever on the connector, and then withdrawing the connector housing vertically

away from the printed circuit board.

Take care not to bend the connector pins.

6. Using a PH2 Phillips screwdriver, undo and remove the screws which retain the battery pack

in the base of the EPIRB.

TECHNICAL SERVICE MANUAL 9

7. Fully discharge the old battery pack and dispose of it in accordance with local regulations.

Assembly

Assembly consists of essentially the disassembly operations in reverse sequence. Each step is to

be completed in numerical order as follows:

1. Ensure that you are using an antistatic mat and wearing the wrist strap.

CAUTION: This equipment contains static-sensitive componentry. Handling precautions are

required and an antistatic wrist strap must be worn.

2. Verify the model type shown on the original chassis.

Only the ﬁrst ﬁve (5) characters are signiﬁcant for the purpose of determining which service

kit type is to be used (that is, MT400, MT401 or MT403).

3. Obtain the correct battery service kit. Refer to Table 6-3 for ordering details.

4. Inspect all components for damage and replace as necessary.

You must always replace the O-ring seal located in the groove around the cap with a new

one prior to assembly of the beacon.

5. Note down the expiry date (month and year) marked on the top face of the replacement

battery pack. You will need this later when marking the battery expiry on the exterior of the

beacon.

Note: Depending on model and or build date of the EPIRB this information is either ink

stamped directly on to the battery pack housing or provided as a sticker.

Battery

expiry date

ink stamping

Battery

expiry

date

sticker

10 TECHNICAL SERVICE MANUAL

6. Fully seat the new O-ring in the groove, ensuring it is ﬁtted evenly with no twists. A blunt

instrument may be of assistance. Whichever tool is used ensure that it does not damage the

face of the O-ring seal.

7. Connect the battery’s ﬂy lead to the PCB.

8. There is only one correct orientation which allows the cap and lower chassis to correctly

mate. Ensure that the guides provided around the lip of the lower chassis mate with the

corresponding ridges provided on the cap (two on one long side, one on the other).

9. When mating the cap and lower chassis together, ensure that the 2 tongues provided on the

lower edge of the printed circuit board (PCB) module engage centrally within the respective

guides provided on the top face of the battery pack. Failure to do so will result in the PCB

unacceptably ﬂexing when the cap and lower chassis are assembled together. A PCB so

ﬂexed must be considered unserviceable.

10. Tighten all 4 screws securing the cap to the chassis evenly before ﬁnally tightening each

screw to a torque of 100 cN·m ± 10 cN·m.

Single rib on

chassis

Double rib on

chassis

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