6.
Inspect the ribbon cartridge.
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7.
Inspect the print cam gear and motor gear on the underside of the printer for
wear and broken teeth.
8.
Inspect the cam lobes for wear or grooves.
3-6
Inspect the spindle gear for wear and missing teeth.
If the cassette has a plastic encoder wheel, inspect it for scratches and
missing lines.
Check the spindles for proper movement, and that the clutches are
providing a slight drag.
Routine Maintenance