Rom Access Door; Roms - Tektronix 4106 Operator's Manual

Appendix D
ROM REPLACEMENT PROCEDURE
The terminal contains several ROMs (read-only memory) that contain the internal
programming that controls the terminal. If updates become available , these ROMs
can be replaced by an operator without the aid of a service techni ci an. The on ly
tool required for this procedure is a small flat-bladed screwdriver.
To replace the ROMs:
1. Turn the terminal off and wait several minutes for it to cool.
2. Remove the ROM access door located at the rear of the terminal (Figure
D-1). Remove the door by pulling it out from the top , then set it aside . The
ROMs are now exposed (Figure D-2a - next page).
REMOVE DOOR
BY PULLING OUT
PRESS DOWN ON TAB AND
PULL OUT ON DOOR
/
/
-
ROM ACCESS
CAUTION
~
FOR ROM fU:,.LACEMENT
AEf£111 TO IN$TRUCTIONS
A. 4106 and 4107
B.4109
Figure D-1. ROM Access Door.
The terminal 's ROMs and some of the other components are highly
sensitive to electrostatic discharge. Before touching the ROMs,
remove static discharge from yourself by touching the silver metal
backplate on the terminal.
NOTE
The first time
a
ROM is replaced it may be difficult to remove from the
socket. With gentle pressure, however, the ROM should come free .
4106/4107/4 109 OPERATORS
4981-238
0-1