5.1.3 PCB Removal / Replacement
If the PCB’s have to be removed the following precautions should be observed;
Removing the door will provide better access to the boards and ensure the hinges are not
accidentally stressed.
Personal anti- static procedures must be followed.
When disconnecting the 20 way connecting cable from the PCB, make sure that the cable
remains connected to at least one board to prevent it being misplaced.
Note: Care should be taken when detaching this connector as it is necessary to depress the
small locking tab to unlock the connector from its base. To reconnect the cable the connector must
first be correctly aligned then pushed into the socket so it locks into position.
Carefully remove the retaining screws at each corner of the board taking care not to damage
any of the components.
Place each board into anti- static storage once removed.
5.1.4 Removing the Knockouts
Carefully decide how the wiring will be brought into the panel then remove the required knock-outs
for the bushes and cables.
The knock-outs should be removed with a sharp tap in the rim of the knock-out using a flat broad-
bladed screwdriver. Use of excessive force could damage the enclosure around the knock-out.
Always ensure if a knock-out is removed, the hole is filled with a good quality cable gland. Any
unused knock-outs must be securely blanked off.
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