Spacebar; Logic Card Assembly - IBM 3279 2A Maintenance Information

4.11.7 Spacebar
4.11.7.1 Removal
Perform the removals described in sections 4.11.1
and 4.11.2 for access to the keyboard assembly.
\. Hold the spacebar at each end (beyond the
modules), and remove by pulling upward evenly.
2. Pivots can be removed (if necessary) by pushing
with a screwdriver in the slot in the side of the
pivot.
To remove the module
see
section 4.1\.6.
4.11.7.2 Replacement
1. Press any pivots removed in step 2 (above) into
the base.
2. Place the spacebar on its modules, and lower it
into position while engaging the bar in the two
pivots.
3. Press down on the spacebar at the spacebar
modules to seat it.
4. Check the spacebar operation for binds.
If
it
binds, the probable cause is a bent right module
stem. This stem can be shaped to free the
bind.
s.
Install the keyboard top cover, and reconnect
the keyboard to the display station if it was
previously removed.
3279 MJM
Logic Card Assembly
1. Remove the keyboard top cover (see section
4.11.2).
2. Disconnect the keyboard cable connector and
clicker connector at the logic card.
3. Remove the two holding screws from each end
of the logic card.
4. Remove the logic card.
S. Reinstall in the reverse sequence.
Note: Check that the keyboard I D jumpers on the
new logic card are in the same position as on the
old logic card. See Figure 6·
J J
if necessary.
Chapter 4. Removal and Replacement Procedures 4-13