Technical data

Field Replaceable Units
Removing and Replacing RAM Cards
5-13
Removing and Replacing RAM Cards
This section provides step-by-step instructions for removing RAM cards from your Model
743.
Preliminary Requirements
Perform the following step before you remove a RAM card:
1 Remove the 743 from it’s chassis. (Removing and Replacing the 743 Board Computer)
WARNING: Be aware that older RAM cards (EDC# A-0201-SM)
require gold colored spacers/standoffs under them.
Newer RAM cards (EDC# A-0202-SM) require silver
spacers/standoffs under them because of spacing
differences inherent between old and new boards.
Read the following section: Spacer/Standoffs
carefully.
Spacer/Standoffs
When installing RAM cards (EDC# A-0202-SM) directly onto the CPU board:
1 If the existing CPU spacers are silver colored, install the RAM card and secure with the
screws provided in the kit.
2 If the existing spacers are gold colored, remove the spacers and screws and set them
aside. Replace the spacers and screws with the silver colored spacers and the screws
from the kit.
When installing RAM cards (EDC# A-0202-SM onto another RAM card, where the
EDC# A-0202-SM will be the topmost card:
1 Remove and discard the screws from the topmost installed RAM card.
2 Install the silver colored spacers from the kit onto the topmost RAM card.
3 Install the EDC# A-0202-SM RAM card, (at this point it becomes the topmost RAM
card) and secure it with the screws provided in the kit.