Epson 4000 - Manual (Page 71)

Cache memory configurations
BANK 0 BANK 1 Tag SRAM Total cache
U20, 21, 22, 23 U29, 30, 31, 32 U36
8K x 8 8K x 8 8K x 8 64KB
32K x 8 x 8K x 8 128KB
32K x 8 32K x 8 32K x 8 256KB
Installing the Chips
Follow these steps:
1. Locate the external cache sockets on the main system board,
shown on page 4-5.
2. If there is an option card in your way, remove it. See
page 4-18 for instructions.
Caution
To avoid generating static electricity and damaging the
cache chips, ground yourself by touching the metal
surface on the inside of the computer’s back panel. Then
remain as stationary as possible while you install them.
3. Remove the cache chips from their package and inspect
them. The pins should point inward at slightly less than a
90° angle.
If any of the pins are bent or crooked, straighten them gently
with your fingers or with small tweezers to align them with
the other pins. Be careful when you do this; the pins are
fragile and can break off easily.
4-24 Installing and Removing Options