Installing Ram Simms - Tektronix Phaser 550 Service Manual

8
FRU Disassembly/Assembly

Installing RAM SIMMs

8-24 Phaser 550 Color Printer
Note
The printer only uses Tektronix proprietary 16-Mbyte and 32-Mbytes
RAM SIMMs.
Installing a second RAM SIMM. If you are installing a second
RAM SIMM in the printer, the larger capacity RAM SIMM must be
installed in the SIMM 1 connector.
4-Mbyte RAM SIMM (part number 671-1561-01 or 671-3574-00)
already installed. This SIMM must be moved to the SIMM 2
connector.
16-Mbyte RAM SIMM (part number 671-3133-00) already
installed.
This SIMM may remain in the SIMM 1 connector if you are
installing a 4-Mbyte RAM SIMM or another 16-Mbyte RAM
SIMM. If you are installing a 32-Mbyte RAM SIMM, it must be
moved to the SIMM 2 connector.
32-Mbyte RAM SIMM (part number 671-3138-00) already
installed. This SIMM must remain in the SIMM 1 connector.
1.
Turn off the printer. Do not unplug the printer; this preserves a
ground path to dissipate static charges.
2. Open the manual feed tray on the left side of the printer.
3.
Loosen the two thumbscrews securing the RAM access cover.
4. Remove the EMI shield.
5. If you are installing a single RAM SIMM. Insert a memory module
in connector SIMM 1 (a) and tilt the module down until it locks in
place (b). When properly inserted, a tab on each end of the connector
slips into a hole on each end of the RAM SIMM. Also, a pawl on each
end of the connector latches around each end of the RAM SIMM to
lock it in place. Go to Step 8.
6. If you are installing two RAM SIMMs. Review the second RAM
SIMM limitations in the note above. Remove the RAM SIMM from
connector SIMM 1. Because of physical space limitations, install
memory modules in the order SIMM 2 and then SIMM 1 with SIMM 1
holding the largest capacity RAM SIMM.
7.
Insert the appropriate memory module in connector SIMM 2 (a) and
tilt the module down until it locks in place (b). When properly
inserted, a tab on each end of the connector slips into a hole on each
end of the RAM SIMM. Also, a pawl on each end of the connector
latches around each end of the RAM SIMM to lock it in place.