Removing The System Board Metalwork - Mitsubishi Electric LS Pro Hardware Technical Reference

System unit
The following illustration shows the thumbscrews and keylock.
CASING
SCREWS
1. Check that the system unit power switch and mains supply are switched off and
disconnect the mains supply.
2. Ensure that the keylock on the rear panel is unlocked.
3. Loosen the two thumbscrews at the top of the rear panel. If they have been done
up tightly it may be necessary to use a screwdriver to loosen them.
4. Slide the top cover forward a few millimetres and lift it clear.
5. Replacing the top cover is simply the reverse of removal. Check that the keylock
is in the unlocked position. Make sure that the top cover is properly aligned
during replacement and do not force it into position.
Note
It is not necessary to remove cables (other than the mains power cable) to remove the system
unit top cover. However, in order to remove some of the internal components external cabling
must be removed.
Removing the The system board metalwork is secured to the power supply metalwork by lugs, and
system board by clips to the system unit base.
metalwork
SECURING
CLIPS
1. Remove the system unit top cover.
2. Release the two retaining latches. On releasing the latches, the system board
metalwork will spring up slightly.
2/6 LS PRO HARDWARE TECHNICAL REFERENCE
CASING
COVER
SCREWS
LOCK
SECURING
LUGS