Epson TM-FX2180 Service Manual page 7

EPSON FX-2180 Service Manual
2. Operating Principles ............................................................................................................2-1
2.1 Overview................................................................................................................2-1
2.1.1 Printer Mechanism...................................................................................2-1
2.1.2 Power Supply Circuit ...............................................................................2-2
2.1.2.1 Power Supply Circuit Operation................................................2-2
2.1.3 Control Circuit..........................................................................................2-3
2.1.3.1 Control Circuit Operation ..........................................................2-3
3. Troubleshooting...................................................................................................................3-1
3.1 Overview................................................................................................................3-1
3.2 Troubleshooting Information ..................................................................................3-1
3.2.1 Print Head ...............................................................................................3-1
3.2.2 Sensors ...................................................................................................3-2
3.2.3 Motors .....................................................................................................3-3
3.2.4 Error Conditions ......................................................................................3-3
3.3 Unit Level Troubleshooting ....................................................................................3-4
3.4 Repairing the Power Supply Board........................................................................3-7
3.5 Repairing the Main Board Assembly......................................................................3-9
3.6 Repairing the Printer Mechanism.........................................................................3-11
4. Disassembly and Assembly.................................................................................................4-1
4.1 Overview................................................................................................................4-1
4.1.1 Precautions .............................................................................................4-1
4.1.2 Tools .......................................................................................................4-1
4.1.3 Specifications for Screws ........................................................................4-2
4.1.4 Service Check After Repair .....................................................................4-3
4.2 Disassembly and Assembly ...................................................................................4-4
4.2.1 Preparing to Disassemble the Printer......................................................4-5
4.2.2 Removing the Panel Board Assembly .....................................................4-6
4.2.3 Removing the Print Head ........................................................................4-7
4.2.4 Removing the HP Sensor........................................................................4-8
4.2.5 Removing the PW Sensor Assembly ......................................................4-8
4.2.6 Removing the Ribbon Mask ....................................................................4-9
4.2.7 Removing the Upper Housing Assembly ...............................................4-10
4.2.8 Removing the Platen Assembly.............................................................4-11
4.2.9 Removing the Platen Gear ....................................................................4-12
4.2.10 Removing the Case Open Sensor Assembly ......................................4-12
4.2.11 Removing the Printer Mechanism........................................................4-13
4.2.11.1 Removing the CR Motor Assembly .......................................4-15
4.2.11.2 Removing the PF Motor Assembly........................................4-16
4.2.11.3 Removing the PG Sensor Assembly.....................................4-17
4.2.11.4 Removing the Right Sub Frame Assembly ...........................4-18
4.2.11.5 Removing the Right Frame Assembly...................................4-18
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