Raymarine ST40 User manual
ST40 Instrument Systems
Service Manual
Document Number: 83149-2
1st February 2004
Instruments Transducers
Speed Speed
Depth Rotavecta
Bidata Fluxgate Compass
Wind
Compass
D4811-2
Copyright © Raymarine Limited 2004
ST40 Instrument Systems
Service Manual
Contents
Part 1 Instrument Disassembly & Reassembly
Part 2 Instrument Servicing
Part 3 Transducer Servicing
Warning
CE Marking of Equipment/Replacement Parts
If the Raymarine equipment under repair, test, calibration, installation or setting to work carries the
European CE mark, only parts and components supplied or approved for such use by Raymarine
should be used in order to maintain compliance with the relevant CE requirements.
Incorporation, use or attachment, by any means, of parts or components not supplied for or not
approved for such use by Raymarine or, if supplied or approved for use by Raymarine, not properly
fitted in accordance with instructions published, provided or recommended by Raymarine, may
cause the equipment to malfunction and, in particular, to become unsafe or to no longer meet the
relevant CE requirements. In these circumstances, Raymarine Ltd excludes liability to the fullest
extent permissible in law for any loss or damage including any liability for its contribution to such
loss or damage by its negligent acts or omissions .
Part 1 Instrument Disassembly & Reassembly
ST40 Instruments Service Manual 83149-2
Contents
ST40 instrument spare parts list .............................................................. 1-1
Disassembly ............................................................................................. 1-1
Reassembly .............................................................................................. 1-3
Part 1 Instrument Disassembly &
Reassembly
Part 1 Instrument Disassembly & Reassembly
ST40 Instruments Service Manual 83149-2
ST40 Instrument exploded view
12439b (Note A)
9a (Note A) 810 (Note B)
5 (x2)
7
6 (x2),
Torque to 2 lb in
D4812-1
Note:
A. It is recommended that new case seals, innner
and outer (9a and 9b) are fitted on re-assembly.
B. Rear labels are supplied in a pack for all
ST40 instruments. The Speed label is illustrated.
ST40 instrument construction
Part 1 Instrument Disassembly &Assembly
ST40 Instruments Service Manual 83149-2 1-1
ST40 instrument spare parts list
The item numbers are shown in the
ST40 instrument construction
illustration
.
Item Description Part No. Comments
1 Bezel
Grey E25020 Standard
Silver E25021 Optional
Carbon E25022 Optional
Flip-flop E25023 Optional
2 Front fascia A28072
3 PCB/LCD/Spade assembly
Speed A28074
Depth A28075
Bidata A28077
Wind A28076
Compass A28078
Each PCB/LCD/Spade assembly includes
4 Display label (appropriate to PCB/LCD/SpadeAssembly type)
5 Washer (x2)
6 Screw (x2)
7 Keypad mat A28079
8 Back case A28073
Includes
9a Case seal, inner
9b Case seal, outer
10 Rear labels (x5, one for each instrument type)
– Suncover E25027 Not illustrated
Disassembly
In order to completely disassemble an ST40 instrument, ensure you have a Back
Case Removal Tool, Part No. E25031, available from Raymarine.
As it is recommended that new inner and outer seals (9a) and (9b) are fitted each time
an ST40 instrument is reassembled, ensure that new seals are available, before
commencing disassembly.
To disassemble an ST40 instrument:
1. Referring to the
Removing bezel
illustration (overleaf), unclip the bezel (1)
from the front fascia (2) as follows:
(a) Hold the instrument in both hands with the display towards you.
Part 1 Instrument Disassembly &Assembly
1-2 ST40 Instruments Service Manual 83149-2
(b) At the control-key end of the instrument, gently press one corner of the
screen, at the same time easing-out the edges of the bezel with your
fingers, then repeat the procedure at the adjacent corner, to release that
end of the instrument from the bezel.
ST40
D4841-4
Do NOT attempt to release this
end of the the bezel until you have
first released the other end.
Always release this
end of the bezel first.
Removing bezel
(c) At the other end of the instrument, ease the top and bottom bezel edges
outwards to unclip them, then withdraw the instrument, from the bezel.
2. Insert the back case removal tool between the front fascia (2) and the back
case (8) as shown, then gently twist the tool to prise the front fascia from the
back cover.
D5039-1
Separating front fascia from back cover
3. Repeat this procedure for each edge of the instrument, until the front fascia
and the back case are completely separated.
Part 1 Instrument Disassembly &Assembly
ST40 Instruments Service Manual 83149-2 1-3
4. Remove and retain the two screws and washers (6) and (5) which secure the
PCB/LCD spade assembly (3) and the front fascia (2) together.
5. Separate the PCB/LCD spade assembly (3), front fascia (2), keypad mat (7)
and display label (4).
6. Note how the inner and outer case seals (9a) and (9b) are fitted, then remove
and discard both seals.
Disassembly is now complete.
Reassembly
If you are fitting a new back case (8), carry out the following procedure, before
reassembling the instrument:
1. Keep a record of the serial number of the instrument (this is shown on the label
on the rear of the original back case).
2. Select the appropriate instrument label (10) from the five provided, peel off the
protective sheet and ensuring correct orientation, stick the label to the rear of
the replacement back case.
To reassemble an ST40 instrument:
1. Insert the keypad mat (7) in its correct position in the front fascia assembly (2).
2. Place the display label (4) in position in the front fascia assembly.
CAUTION:
Damage to the ST40 instrument can occur if screws are overtightened. Always
use the recommended torque values.
3. Fit the PCB/LCD/spade assembly (3) to the front fascia (2) and secure these
items together with the two screws and washers (6) and (5). Tighten to a
torque of 22 Nm (2 lb inches).
4 Fit a new inner seal (9a) to the rear of the PCB/LCD/spade assembly (3),
ensuring that it is correctly orientated and that it lies flat on the carrier.
5 Fit a new outer seal (9b) inside the back case, ensuring that the positioning
lugs are correctly located.
6. Clip the front fascia (2) and the remaining components (3) to (10) together.
Press along each edge to ensure that all clips are fully made.
7. Fit the instrument into the bezel, so the curved end of the instrument slides
under the lugs on the bezel, as shown in the following illustration.
Part 1 Instrument Disassembly &Assembly
1-4 ST40 Instruments Service Manual 83149-2
D5038-1
8 Gently but firmly press the bezel onto the instrument until it clicks into place.
D5038-2
Reassembly is now complete.
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