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Installation
ACCESSORY INSTALLATION
PROCEDURES
Instructions for installing add-on accessories to the stand-
ard model terminal are contained in the following para-
graphs.
ENSURE that the circuit work surface
(table, desk, etc.) and PCA are all at the
same ground potential. This can be done
by touching the foam pad to the PCA and
then touch the foam pad, circuit, and
PCA to the work surface.
NOTE
After installing any accessory, always
use the terminal self-test featurt' (refer
to
"Self-Test")
to
ensure
proper
operation.
64 CHARACTER LOWER CASE ROM
1. ()
Open terminal to its half open position (refer to
"Opening the Terminal").
2. ()
Insert connector removal tool under Top Plane
Assembly as shown in figure 7-7 and remove Top
Plane Assembly by pressing down on connector
removal tool handle.
The 64 Character Lower Case ROM, part no. 1816-0613, is
used 'to upgrade standard 64 character set terminals to
128 Roman characters. Do not confuse this with the alter-
nate character sets described in "HP 13231A Display En-
hancements" paragraph. Install the ROM as follows:
I
CAUTION
I
3. ()
Locate and remove Display Control PCA from
Backplane Assembly.
4. ( )
Using figure 7-5 as a guide, locate the 128 CH
jumper WI position and solder in ajumper. (If the
board uses a jumper socket or switch, insert a
jumper or make the proper setting.)
MOS integrated circuits can be damaged
by electrostatic discharge. Use the fol-
lowing precautions:
DO NOT wear clothing subject to static
charge buildup, such as wool or synthetic
materials.
DO NOT handle MOS circuits in car-
peted areas.
DO NOT remove the circuit from its con-
ductive foam pad until you are ready to
install it.
A VOID touching the circuit leads.
Handle by the plastic package only.
5. ()
Locate the vacant lower case ROM socket XU28.
6. ()
Carefully insert 64 Characters Lower Case ROM
in socket XU28 so that ROM pin 1 is at upper
right corner of XU28.
7. ()
Reinstall Display Control PCA in Backplane As-
sembly connector from which it was removed.
8. ()
Reinstall Top Plane Assembly on DMA, Display
Timing, and Display Control PCA's top
connectors.
9. ()
Firmly grasp top cover in one hand and release
safety latch by pressing it inboard with other
hand. Then, using both hands, carefully lower top
cover to its closed position.
128 CHARACTER JUMPER POSITION
B
dL--_-----'
f1]
BC1~~
@,ill
~~1~j0622
DSPLY CNTL
~ ~
0
B
0
~
c,
H;
0
B
C6
~
0
CI
~ ~
0C~j
c;==s
B
Figure 7-5. Display Control
peA
Component Locations
7-6
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