The Memory Expansion Boards
Checking the board
Complete the following steps to make sure that the memory
expansion board is installed properly and is functioning correctly.
1.
Turn on the printer power and watch the display for the
following:
l All the indicator lights on the display light briefly
l The message ROM Check appears
l The message RAM Check x.x MB appears.
2.
Make sure that the amount of RAM displayed by the RAM
check status message matches the new total RAM memory, as
shown below:
Memory Expansion
Total RAM when filled
2 MB Board .5 MB Board
Board without chip set
4.0 MB
2.5 MB
Board with 1 chip set (4 chips)
4.5 MB
3.0 MB
Board with 2 chip sets (8 chips)
5.0 MB
3.5 MB
Board with 3 chip sets (12 chips)
5.5 MB
4.0 MB
Board with 4 chip sets (16 chips)
6.0 MB
4.5 MB
If the correct amount of RAM does not appear, turn off the power
and remove the board to check that the chip set is in the correct
sector and that each chip is well-seated in its socket.
If the RAM check message is still incorrect, contact your service
representative for assistance.
Appendix A A-47
