HP 24SII - Manual (Page 135)

C.4 MODEL 24SII MEMORY MODULE
EPROM UPGRADE
The materials you will receive with your upgrade kit are:
1 EPROM (chip with label). This Chip will be marked to identify which
memory module type they install into.
The materials you will need to supply are:
Phillips-head screwdriver
IC DIP extractor or a pair of curved needle-nose pliers
1. IMPORTANT: Remove power from the unit by depressing the
power switch on the front of the unit to OFF. Also remove power
cord from the AC outlet.
2. Using the phillips-head screwdriver, remove the 4 phillips-head
screws holding the top cover of the unit. After screws are removed,
lift off cover.
3. If upgrading the M24SII-M01 memory module, locate socket U102
on the module (see Appendix D.4 ). If upgrading the M24SII-M02
memory module, locate socket U2 on the module (see Appendix
D.5 ).
4. Remove existing EPROM from the appropriate socket with IC
extractor or needle-nose pliers. Gradually loosen each side of the
chip, alternating pliers from side to side, so as not to bend chip
pins. Pull loosened EPROM all the way out.
5. Install new EPROM into the appropriate socket. The EPROM is
notched; the notch on the EPROM should line up with the notch on
the socket. When installing the new chip, be careful not to bend
any of the pins. Make sure none of the pins miss their socket. Also
make certain that you install the correct EPROM into the
appropriate memory module.
6. Replace the cover; the upgrade is now complete.