NCR 7193, Service Manual

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7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer
August 1998 41
Note:
The platen cannot be replaced on knife units. The receipt cover comes complete as a
kit and cannot be disassembled.
Replacing the Platen
1. Slide one end of the platen shaft into the slot on the receipt cover and press the other
side until it snaps in place in the other slot.
2. Bow the paper guide slightly so the paper guide arms are bent in slightly and insert the
paper guide into the receipt cover.
Once you let go, the tabs should lock the paper guide into place.
Note: Whenever either the rotating knife blade (on the print mechanism) or the stationary
knife blade (in the receipt cover) need to be replaced on knife units, both knife blades must
be replaced. Order the knife blade kit, which includes the receipt cover. See “Appendix C:
Kits.”
Removing the L Cover
The L cover is held in place by three molded latches at its three corners.
1. To release the rear latch, push back on the rear wall of the cabinet (with the printer
facing you) with one hand while pulling gently forward on the rear of the L cover with
your other hand.
2. When the rear latch is released, pull the L cover up gently and the two front latches
will release freeing the cover.
Caution: Be aware of the ground strap connecting the L cover and the PC board. Do not
jerk the cover away or the strap may be damaged.
3. Disconnect the ground strap from the PC board (not from the L cover).