Epson Apex Product Support Bulletin(s) - Page 27

Product, Support, Bulletin

Get Epson Apex PDF manuals and user guides View all Epson Apex manuals
Add to My Manuals
Save this manual to your list of manuals

Page 27 highlights

Product Support Bulletin Subject: Apex Computer - 640KB Memory Upgrade Procedure Date: 6/7/89 Page: 1 of 2 PSB No: S-0022A Originator: REM 2% The Apex by Epson comes standard with 512KB of RAM memory. This can be expanded to 640KB by installing additional RAM chips on the Apex memory (piggyback) board in the I.C. sockets provided. The memory board is attached to the CPU board. This upgrade requires 4 each 4464, 21464 or 41464 (4 x 64) DRAMS (150ns) which are available from Epson's Accessories Marketing department (Tel. # 800 - 873 - 7766) and should also be available at local electronic component suppliers. INSTALLATION INSTRUCTIONS 1. Refer to section 5 of the Apex User's Guide (Installing Option Cards) for information on removing and replacing the Apex top cover. Ensure that the AC power is disconnected from the unit. 2. After the top cover is removed, unscrew the CPU board retaining screw and disconnect the 5 connectors which are attached to the top of the CPU board. Note the positions of the connectors for later reconnection. Refer to figure 1 for details of board and connector locations. Figure 1 i!l POWER SUPPLY

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
Product
Support
Bulletin
Subject:
Apex Computer -
640KB Memory Upgrade Procedure
Date: 6/7/89
PSB No: S-0022A
Page:
1 of 2
Originator: REM
2%
The Apex by Epson comes standard with 512KB of RAM memory. This can be
expanded to 640KB by installing additional RAM chips on the Apex memory
(piggyback) board in the I.C. sockets provided. The memory board is attached to
the CPU board. This upgrade requires 4 each 4464, 21464 or 41464 (4 x 64)
DRAM
S
(150ns) which are available from Epson’s Accessories Marketing department
(Tel. # 800 - 873 - 7766) and should also be available at local electronic component
suppliers.
INSTALLATION INSTRUCTIONS
1. Refer to section 5 of the Apex User’s Guide (Installing Option Cards) for
information on removing and replacing the Apex top cover. Ensure that the AC
power is disconnected from the unit.
2. After the top cover is removed, unscrew the CPU board retaining screw and
disconnect the 5 connectors which are attached to the top of the CPU board.
Note the positions of the connectors for later reconnection. Refer to figure
1 for details of board and connector locations.
i!l
POWER
SUPPLY
Figure 1