Removing Card Jams - IBM 3774 Operating Procedure Manual

Removing Card Jams
9-4
4
Remove the chip box (Figure 9-2).
5
Replace the chip box after it is emptied.
6
Close the front cover.
7
Make the card punch ready as described in the "Make Ready Procedure".
The most probable cause of a card jam is card damage at the column 1 end of the card;
the card is bent or nicked and will not pass through the punch. Most card jams can be
removed easily; however, trying to use the NPRO (non process run out) key to try to
run a damaged card through the punch, or forcing a card out of the punch can compli-
cate the correction of an otherwise simple card jam.
Figure 9-3. Removing a Card Jam at the Hopper
To remove a card jam:
CAUTION
As you do not turn the terminal or card punch power off when rcmovir.g a card jam,
you can avoid unexpected starting of the punch by disconnecting the punch's power
plug at the rear of the punch; this plug is shown in Figure 9-1. Be sure to reconnect
the plug after the card jam is removed. ·
1
Press the RED (STOP) key.
2
Tf
the card jam is at the hopper, remove the card as shown in Figure 9-3.
3
Open the front cover as shown in Figure 9-1.
4
To gain access to the card path area, loosen the wingscrew located at the top of
the punch's printing unit (see Figure 9-4,) and pivot the top half of the printing
unit open.
5 Open the registration station cover shown in Figure 9-4. Hold the cover out of
the way as shown in Figure 9-4.
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