Technical data

Field Replaceable Units
Socketed ICs
5-31
Socketed ICs
This section provides step-by-step instructions for replacing the socketed integrated cir-
cuits.
You can replace the following socketed ICs in your Model 743, as shown in the accompa-
nying figure:
Boot ROM; U54
EEPROM; U55
OEM ROM; U52
NOTE: The OEM ROM is customized for specific applications and is only
available from the company who makes it. Consult the customer to
find out what company their Model 743 VMEbus Board Computer
was purchased from.
Preliminary Requirements
Perform the following steps before removing a socketed IC:
1 Remove the743 from it’s chassis.
2 Remove accessory cards or boards which block the computer’s left side and center po-
sitions.
Removing and Replacing Socketed ICs
Perform the following steps to remove a socketed IC. If you are replacing a socketed IC,
reverse the following steps.
NOTE: Figure 5-15 depicts a stripped down board from the front,
displaying and naming just the IC’s.
1 Before removing the IC, note its position/orientation. The replacement IC must be in-
stalled in the same position. See Figure 5-15.