Specifications

Chapter 5: Disassembling and Reassembling the Printer 7193 Service Guide
August 199846
Disassembling the Print Mechanism
The following subassemblies and parts may be removed from the print mechanism for
service or replacement:
• Printhead
• Knife assembly and motor (on knife unit)
• Paper feed motor
•
Switches for sensors (paper out, knife home, and cover open).
Removing the Knife Assembly
1. Using a 1½ mm hex driver, remove the set screw from the top of the knife drive arm.
See the illustration.
2. Carefully pry off the slotted drive arm, separating it from the rotating blade.
Take care not to loosen or remove the gears.
3. Unscrew the ground strap and remove it from the right-hand side of the rotating
blade.
4. Unscrew both screws on the left side knife support using a #1 Posidriver and remove
the left side knife support.
5. Slide the rotating blade out of the right knife support.
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.”