Service manual

10 ST70 Service Manual
COMMERCIAL IN CONFIDENCE
For information only
For information only
COMMERCIAL IN CONFIDENCE
2.2 Disassembly
The sealing washer, keypad seal and case seal must not be re-used, so before disassembling an ST70 Instru-
ment or pilot controller, ensure you have a new sealing washer, keypad seal and case seal to hand.
When disassembling an ST70 instrument or pilot controller, always take note of how the product is assem-
bled, to facilitate reassembly.
Referring to the exploded view on page 9:
1. Remove case screw and sealing washer from rear of unit. Retain the case screw but discard the sealing
washer.
CAUTION: Take care when unclipping bezel
Do not exert excessive pressure to the bezel clips as this could damage them.
2. Carefully unclip each bezel clip in turn working progressively around the perimeter of the product. At the
same time carefully apply pressure to separate the rear case from the bezel.
3. Raise the locking bar on the Flexi connector and carefully extract the flexi tail.
4. Remove the LCD from the rear case assembly.
5. Remove the PCB from the rear case assembly. You will feel some slight resistance until the PCB SeaTalk
ng
connectors separate from the connectors on the rear case assembly.
2.3 Reassembly
When reassembling an ST70 Instrument or pilot controller always fit a new sealing washer, keypad seal and
case seal.
Reassemble as follows:
1. Place the PCB assembly into the rear case assembly and press it home until the SeaTalk
ng
connectors on
the PCB are fully engaged with the connectors on the rear case assembly.
2. Replace the LCD as follows:
i. Ensure the locking bar on the Flexi connector is raised, then fully insert the flexi.
ii. Lower the locking bar fully to secure the flexi tail.
iii. If the LCD has a protective film, remove it
3. Fit the keypad seal then, ensuring that the top flange of the keypad is located under the bottom of the LCD,
place the keypad in position on the keys.
4. Remove any protective films from the bezel window.
5. Ensure that the case seal is correctly oriented, then place it in position on the bezel.
6. Firmly press the rear case assembly and the bezel together to fully engage all the clips. Pay particular
attention to the clips at the bottom of the product, to ensure they are engaged.
7. Secure the rear case assembly with the case screw and a new sealing washer. Torque the screw to
2 pound inches (0.22 Nm).
WARNING:Sharp edges
Do not touch the spring connectors on the front of the PCB, as these have sharp
edges and could cause injury.