Epson TM-FX2180 manual Power Supply Circuit Operation, Board Input Voltage Fuse F1 Rating

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EPSON FX-2180 Service Manual

2.1.2 Power Supply Circuit

The printer can be powered by one of the following three power supply boards: C166 PSB (120 V), C166 PSE (220 – 240 V), or C244 PSH

(120 V / 220 – 240 V). The boards function in the same way, except each board has a different primary circuit. The table below lists the input voltages and fuse ratings of the boards.

Table 2-1. Power Supply Board

Board

 

Input Voltage

 

Fuse

F1 Rating

 

 

 

 

 

 

C166 PSB

 

103.5 – 132 V

 

3.15

A / 125 V

C166 PSE

 

198 – 264 V

 

T 2.0 AH / 250 V

C244 PSH

 

85 – 138 V / 187 – 276 V

 

 

5HT4

2.1.2.1Power Supply Circuit Operation

The power supply board has two DC power outputs: one for the control circuit and one for the printer mechanism. The table below lists the applications of the output voltages.

Table 2-2. Power Supply Output Applications

Output Voltage

 

 

Applications

 

 

 

 

+5 VDC

 

Control circuit board logic

 

 

Sensors

 

 

Control panel LEDs

+35 VDC

 

CR motor

 

 

PF motor

 

 

Print head

Chapter 2 Operating Principles

When AC power enters the printer from an external power source, the filter circuit removes the noise. Then the AC voltage undergoes full-wave rectification and is smoothed to produce direct voltage. In the C244 PSH board, the AC voltages undergo voltage doubler rectification in the automatic switching IC and are smoothed to produce direct voltage. The voltage is fed to the gate port for switching FET Q1 through resistors R18 and R31. Then the switching circuit operates.

The secondary smoothing circuit produces a stepped down +35 VDC voltage. The +5 VDC voltage is generated and stabilized by feeding the +35 VDC voltage through the +5 VDC power supply circuit. The power supply circuit includes a ZC-RCC (zero cross-ringing choke converter), which contributes to the power supply circuit’s high stability, efficiency, and portability.

The secondary circuit system of the power supply circuit includes the Operate (power) button. The Operate button is located on the printer’s control panel and controls the power supply circuit.

A+35 V line constant voltage control circuit and over-current/over-voltage protection circuits are provided to protect the printer and control circuits.

2-2

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Contents 659,&0$18$ FCC Compliance Statement For American Users Trademarks Precautions Preface Table of Contents Page Page Product Description Character Printable Printing Speed cps SpecificationsPrinting Specifications Print Speed and Printable ColumnsVertical Adjacent Dot Density dpi ResolutionPrinting Mode Printable AreaEnvelopes Continuous PaperRoll Paper PostcardsPaper Feed Specifications Paper SpecificationsFront Entry Rear Entry Minimum Maximum Minimum Maximum Front Entry Rear Entry Bottom Entry Min Max Interface Specifications Software SpecificationsFront Entry Bottom Entry Minimum Maximum Reliability Electrical SpecificationsPhysical Specifications Environmental ConditionsOperation LEDs Button FunctionLEDs Color Description Lever Position Description Error Beep PatternPaper Release Lever Positions BeeperPrinting a Self Test Turning on the Double-strike ModeSpecial Functions Paper Thickness Lever PositionsUsing the Bidirectional Adjustment Mode Changing Default SettingsSetting Options Consumables Consumables and OptionsPrinting a Hex Dump Clearing the EepromOperating Principles Printer Mechanism OverviewOutput Voltage Applications Power Supply CircuitPower Supply Circuit Operation Board Input Voltage Fuse F1 RatingControl Circuit Operation Control CircuitCPU IC2 Component Functions+$375 Print Head Troubleshooting InformationSensor Test Points SensorsMotors Error ConditionsSymptom Problem Description Flowchart Unit Level TroubleshootingFlowchart Abnormal Paper Feeding Abnormal Power Operation Problem Cause Checkpoint Solution Repairing the Power Supply BoardWaveform Problem Cause Checkpoint Solution Repairing the Main Board Assembly15. Waveform Repairing the Printer Mechanism Repairing the Printer MechanismFFC TOP Troubleshooting Disassembly and Assembly Tool PrecautionsDescription Specification ToolsAbbreviation Part Name Specifications for ScrewsCategory Item to Question to Answer Checkmark Service Check After RepairWhenever you repair the printer, wipe Disassembly and AssemblyRear tractor tab 1 Preparing to Disassemble the PrinterRemoving the Panel Board Assembly Removing the Panel Board AssemblyRemoving the Print Head Connecting the Print Head FFCsRemoving the HP Sensor Removing the PW Sensor AssemblyRemoving the Ribbon Mask 10. Installing the PW Sensor Assembly13. Removing the Upper Housing Assembly Removing the Upper Housing Assembly15. Removing the Platen Assembly Removing the Platen AssemblyRemoving the Platen Gear Removing the Case Open Sensor AssemblyRemoving the Printer Mechanism 18. Removing the Case Open Sensor AssemblyCN9 Connector Pins21. Removing the CR Motor Assembly Removing the CR Motor Assembly22. Removing the PF Motor Removing the PF Motor Assembly23. Removing the PG Sensor Assembly Removing the PG Sensor AssemblyRemoving the Right Frame Assembly Removing the Right Sub Frame Assembly$-867017 Disassembling the Right Frame Assembly27. Engaging the Right Frame Assembly Gears 1 29. Engaging the Tractor Clutch Cam Removing the Left Frame Assembly30. Removing the Left Frame Assembly Removing the Ribbon Drive RD AssemblyTightening torque for the two CBS screws Removing the CR Assembly34. Inserting the Timing Belt 36. Installing the Rear CR Guide Shaft Removing the Rear PE Sensor Assembly38. Removing the Front PE Sensor Assembly 39. Removing the Upper Shield Plate and Upper I/F 41. Removing the Power Supply Board Assembly Removing the Power Supply Board AssemblyAdjustments Adjustment Overview Required AdjustmentsAdjustment Tools Platen Gap/Parallelism Adjustment Adjusting and Resetting the PrinterSetting the PG Adjustment Lever Adjusting the Parallelism of the Carriage Guide Shaft Bidirectional Print Alignment Bi-d AdjustmentDestination Setting Performing the Bi-d Adjustment Using the Settings DisketteBi-d Adjustment Menu Performing the Bi-d Adjustment from the Control Panel11. Pitch Lights Factory SettingsTPE level. Check that the reset value is FF TPE Level Reset17. Main Menu Adjustments Maintenance Name Quantity Availability Part Number Preventive Maintenance LubricationRef. No Lubrication Points Quantity Lubricant MaintenanceLubrication Points 1 Appendix Connector Summary Board Connector Function PinsSignal Name Function Pin Signal Name Function Table A-8. Connector Pin Assignments − CN9 Table A-13. Connector Pin Assignments − CN14 Figure A-3. C244 Main Board Component Layout Diagram 2 Circuit Board Component Layout DiagramsFigure A-4. C166 PSB Board Component Layout Diagram Circuit Board and Exploded Diagrams Page DB1 A t s in k Q 1 , D 5 Page Exploded Diagram for FX-21801 Exploded Diagram for FX-21802 Exploded Diagram for FX-21803