2-10
4227-100
Service Checks
Auto Gap Service Check
Theory of Operation:
The Auto Gap Motor and Gap Home Sensor automatically set the
printhead gap for the thickness of paper being used by rotating the
eccentric carrier shaft. The printer detects maximum gap with the
Gap Home Sensor, and minimum gap by driving the printhead
against the platen. In addition to compensating for the thickness of
the paper itself, the printer must increase the air gap for thicker
papers.
With Auto Gap On, the following occurs:
•
POST.
•
Auto Gap resets.
•
The printer unloads paper if it is loaded, to prepare to measure
the travel span.
•
The auto gap motor drives the printhead against the platen to
measure the total travel span.
•
Auto Gap resets again, to make room for paper to be loaded.
•
The paper feeds to the print line.
•
The auto gap motor drives the printhead against the paper to
measure the total travel span minus the paper thickness.
•
Auto Gap resets again.
•
The printhead moves to the appropriate gap position for the
installed paper.
•
The Ready LED turns on, the carrier centers, and the paper
moves to the tearoff position.
Summary of Contents for 4227-100
Page 10: ...x 4227 100 Korean Safety Information...
Page 101: ...Connector Locations 5 1 4227 100 5 Connector Locations...
Page 105: ...Connector Locations 5 5 4227 100 Component Location Illustrations...
Page 106: ...5 6 4227 100 Component Location Illustrations Continued...
Page 114: ...5 14 4227 100 Connector Block Diagram...
Page 119: ...Parts Catalog 7 2 Assembly 1 Covers and Operator Panel...
Page 121: ...Parts Catalog 7 4 Assembly 2 Paper Feed...
Page 123: ...Parts Catalog 7 6 Assembly 3 Carrier...
Page 125: ...Parts Catalog 7 8 Assembly 4 Base and Electronics...
Page 127: ...Parts Catalog 7 10 Assembly 5 ASF Side Frame Covers...
Page 129: ...Parts Catalog 7 12 Assembly 6 ASF Roller Support...
Page 131: ...Parts Catalog 7 14 Assembly 7 Tractor 2 Option...