Chapter 4. Removal And Replacement Procedures; General; Logic Gate; Rear Cover - IBM 3279 2A Maintenance Information

Chapter 4. Removal and Replacement Procedures
4.1 General
It is recommended that the display be positioned
near the corner of a table with the right-hand side
of the bzzel nearest the corner, 1eaving sufficient
clearance for the bezel to be placed face down on
the table in front of the display. If a tilt/rotate
table is used, lock it in the horizontal position.
4.2 Logic Gale
To open the logic gate, insert an allen wrench in
each of the two slots on the right-hand side of the
display and
tUTn
the wrench a quarter
tUTn
in each
slot. The rear enclosure assembly can then be
swung open on the hinges.
Logic Gate
Control
Switches
Figure 4-1. General View - Bezel Removed
3279 MIM
4.3 Rear Cover
To remove the rear cover, open the customer access
panel by pressing up on the two clips. Remove the
three screws located along the hinged section of the
cover.
4.4 Bezel
1. Switch power off and remove the mainline
power cable from the power socket.
2. Remove the two aBen screws from the under
side of the bezel and lift the bezel up and away
from the enclosure assembly.
Alarm
CRT and Coil
Brightness Potentiometer
and Intensity
Override Switch
Volume
Potentiometer
Chapter 4. Removal and Replacement Procedures 4_1