The Fujitsu FI 5950 is a high-performance dot matrix printer designed for heavy-duty business applications. This service manual covers technical specifications, maintenance procedures, troubleshooting guides, and repair instructions for qualified service technicians. The FI 5950 features high-speed printing, multiple paper handling options, and robust construction for reliable operation in demanding environments.
Detailed technical specifications and performance characteristics of the Fujitsu FI 5950 dot matrix printer.
| Specification | Details |
|---|---|
| Print Method | 24-wire dot matrix impact |
| Print Speed | Up to 600 characters per second |
| Paper Width | Up to 16 inches continuous forms |
| Interface | Parallel, Serial, and optional network |
| Character Sets | Multiple international character sets |
| Buffer Memory | 128KB standard, expandable to 1MB |
| Power Requirements | 100-240V AC, 50/60Hz |
| Dimensions | 650mm (W) x 400mm (D) x 300mm (H) |
| Weight | Approximately 25 kg |
| Operating Environment | 10-35°C, 20-80% humidity |
Critical safety information for service technicians working on the FI 5950 printer.
WARNING! High voltages are present inside the printer. Only qualified technicians should perform internal repairs.
Step-by-step installation and setup instructions for the FI 5950 printer.
CAUTION! Ensure printer is on stable, level surface to prevent tipping.
Detailed electrical system specifications and testing procedures.
Power Supply: Input: 100-240V AC, 50/60Hz; Output: +5V DC, +24V DC, +35V DC
Main Board: 16-bit microprocessor, 128KB RAM, ROM firmware
Motor Drivers: Stepper motors for carriage and paper feed, DC motor for fan
Sensors: Paper-out sensor, home position sensor, ribbon sensor, temperature sensor
Testing Procedures: Use multimeter to verify voltage levels at test points. Check continuity of cables and connectors.
Print head cleaning, inspection, and replacement procedures.
Tip: Regular cleaning extends print head life. Clean after every ribbon change.
Maintenance and adjustment of paper feed mechanisms.
WARNING! Never force paper through feed mechanism. This can damage tractor pins.
Control panel functions, indicators, and configuration procedures.
Buttons: POWER, LF/FF (Line Feed/Form Feed), LOAD, PAUSE, TEST
Indicators: POWER (green), READY (green), PAPER (red), ERROR (red)
Configuration: DIP switches for interface settings, character tables, and emulation modes
Self-test: Hold TEST button during power-on to print configuration and test pattern
Factory Reset: Power off, hold LF/FF and PAUSE, power on to reset to factory defaults
Common error codes, their meanings, and resolution procedures.
| Error Code | Description | Resolution |
|---|---|---|
| E-01 | Carriage error | Check carriage movement, clean rails |
| E-02 | Paper feed error | Check paper path, clean sensors |
| E-03 | Print head temperature | Allow cooling, check thermal sensor |
| E-04 | Ribbon error | Check ribbon installation |
| E-05 | Memory error | Reset printer, check main board |
| E-06 | Power supply error | Check power supply voltages |
Authorized replacement parts and installation procedures.
Note: Use only Fujitsu authorized parts for replacement to maintain warranty.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| No power | Power cable, fuse, power supply | Check power source, replace fuse, test power supply |
| Poor print quality | Print head, ribbon, gap setting | Clean/replace print head, replace ribbon, adjust gap |
| Paper jams | Misaligned tractors, worn rollers | Align tractors, clean/replace feed rollers |
| Communication errors | Cable, interface, settings | Check cable connections, verify interface settings |
| Carriage stalls | Obstructions, motor failure | Clear obstructions, lubricate rails, test motor |
Service Contact: Fujitsu Technical Support: 1-800-FUJITSU
Parts Ordering: www.fujitsu.com/global/services/computing/peripherals/printers