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Operating Principles
EPSON FX-880/FX-1180 Service Manual
2-3
As shown in the diagram below, the head driving coil, when energized, pulls against the actuating plate.
This thrusts the dot wire against the ink ribbon and creates a printed dot. (The ribbon mask prevents the
ribbon from smudging the paper as the printhead moves back and forth across the page.)
After striking the ink ribbon, the driving coil is shut off and the dot wire returns to its original position. This
is accomplished by the wire resetting spring, which is aided by the rebound action of the dot wire hitting
the platen.
Since the printhead heats up after a period of use, it is equipped with a thermistor to detect head
temperature. Voltage changes reflecting changes in the thermistor’s resistance are output to the CPU.
Should the printhead overheat, the CPU detects this and automatically stops printing until the printhead
cools.
Pivot
Figure 2. Printhead Drive Coil Mechanism
Summary of Contents for FX-1180 - Impact Printer
Page 1: ...Epson America Inc TM FX88 1180 Service Manual FX 880 FX 1180 ...
Page 4: ...iv EPSON FX 880 FX 1180 Service Manual ...
Page 6: ...vi EPSON FX 880 FX 1180 Service Manual ...
Page 11: ...Product Descriptions 1 ii EPSON FX 880 FX 1180 Service Manual ...
Page 42: ...Operating Principles 2 ii EPSON FX 880 FX 1180 Service Manual ...
Page 60: ...Disassembly and Assembly 3 ii ESPON FX 880 FX 1180 Service Manual ...
Page 94: ...Adjustments 4 ii EPSON FX 880 FX 1180 Service Manual ...
Page 103: ...Troubleshooting 5 ii EPSON FX 880 FX 1180 Service Manual ...
Page 128: ...Maintenance 6 ii EPSON FX 880 FX 1180 Service Manual ...
Page 135: ...Appendix A ii EPSON FX 880 FX 1180 Service Manual ...
Page 143: ...Appendix A 8 EPSON FX 880 FX 1180 Service Manual Figure A 3 C229 PSB Board Component Layout ...
Page 144: ...Appendix EPSON FX 880 FX 1180 Service Manual A 9 Figure A 4 C229 PSE Board Component Layout ...
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