Fujitsu FI 6140 Service Manual

The Fujitsu FI 6140 is a high-performance dot matrix printer designed for business and industrial applications. This service manual provides comprehensive information for maintenance, troubleshooting, and repair procedures. The FI 6140 features parallel and serial interfaces, multiple paper handling options, and robust construction for reliable operation in demanding environments.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Maintenance Procedures 8. Error Codes 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Dot matrix print head, paper feed mechanism, control panel, interface ports, power supply unit.

Feature	Description
Print Method	24-pin dot matrix impact
Print Speed	Up to 480 cps (draft mode)
Paper Handling	Tractor feed, friction feed, single sheet
Interfaces	Parallel Centronics, RS-232 serial
Character Sets	Multiple international character sets
Control Panel	LED indicators and function buttons
Power Requirements	100-240V AC, 50/60Hz
Dimensions	Standard desktop form factor
Weight	Approximately 8.5 kg
Noise Level	Less than 55 dB during operation

Installation

Unpack and inspect contents. Place on stable, level surface.

Remove all packaging materials and protective tapes
Install paper guide and paper support
Connect interface cable (parallel or serial)
Connect power cord to AC outlet
Install ribbon cartridge
Load paper using tractor or friction feed

WARNING! Printer contains high-voltage components. Disconnect power before servicing.

First-Time Setup

Power on printer; perform initial configuration.

Set DIP switches for interface and emulation mode
Configure paper settings (length, thickness)
Run self-test to verify operation
Install printer driver on host computer
Adjust print head gap for paper thickness

CAUTION! Ensure proper ventilation; maintain clearance around printer.

Specifications

Print Method: 24-pin dot matrix impact
Print Speed: 480 cps (draft), 160 cps (NLQ)
Paper Width: Up to 10 inches continuous forms
Interfaces: Parallel, RS-232 serial
Emulations: IBM Proprinter, Epson LQ
Character Sets: ASCII, international characters
Power Consumption: Approx. 60W operating, 10W standby
Operating Environment: 5-35°C, 20-80% humidity
MTBF: 10,000 power-on hours

Controls and Settings

Front Panel: POWER, SELECT, LF/FF, LOAD/EJECT buttons with LED indicators.

DIP Switch Settings: Interface selection, emulation mode, auto line feed, character tables.

Print Quality: Draft, NLQ (Near Letter Quality). Paper Handling: Tractor feed settings, tear-off position, top-of-form setting. Interface: Parallel/SELECT selection, baud rate settings (serial).

Connecting Devices

Parallel: Standard Centronics interface. Serial: RS-232 with configurable parameters.

Turn off printer and computer before connecting
Use shielded interface cables
Secure cable connectors firmly
Set interface parameters via DIP switches
Verify communication with test print

Tip: Use high-quality cables to prevent data errors and interface issues.

Maintenance Procedures

Regular maintenance ensures optimal performance and extends printer life.

Ribbon replacement: Every 3 million characters or when print quality degrades
Print head cleaning: Use isopropyl alcohol and lint-free swab
Platen cleaning: Remove paper dust and debris
Lubrication: Apply specified lubricant to moving parts as needed
Sensor cleaning: Clean paper sensors and optical sensors
Head gap adjustment: Set according to paper thickness

WARNING! Disconnect power before performing any maintenance.

Error Codes

LED indicators and error codes help diagnose problems.

Error Code	Description	Action
POWER LED blinking	Paper out	Load paper and press SELECT
POWER LED off	Power supply issue	Check power connection and fuse
SELECT LED blinking	Head temperature high	Allow printer to cool
Both LEDs blinking	Fatal error	Contact service technician

Care & Cleaning

Unplug before cleaning. Use dry cloth for exterior; isopropyl alcohol for print head.

CAUTION! Do not use abrasive cleaners or solvents. Keep printer away from direct sunlight and moisture.

Regulatory Information

FCC Part 15: Class A digital device; complies with interference limits for business environments. CE marked for European compliance. Copyright © Fujitsu Limited; all rights reserved. For technical support, contact Fujitsu authorized service centers or visit www.fujitsu.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord, fuse, switch	Check power connection; replace fuse if blown
No printing	Interface, cables, settings	Verify interface connection; check DIP switch settings
Poor print quality	Ribbon, print head, paper	Replace ribbon; clean print head; adjust head gap
Paper feed issues	Tractor, sensors, mechanism	Clean paper path; check tractor alignment
Communication errors	Cables, settings, interface	Use shielded cables; verify interface settings

Reset: Power cycle printer; restore factory defaults if needed.

Service: Contact Fujitsu authorized service center for major repairs.