Raymarine ST40 Service Manual page 9

Part 1 Instrument Disassembly & Assembly
Reassembly
ST40 Instruments Service Manual 83149-2
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.
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.
1-3