Epson Stylus NX510, SX410, SX210, NX420 & NX220 Series Printer Service Manual, 2009–2010 (P/N SEMF09-002)

This Epson color inkjet printer service manual covers the Stylus NX510, SX410, SX210, NX420, and NX220 series, including the ME OFFICE variants listed above. It is Revision B, dated March 30, 2010, P/N SEMF09-002.

Text Search and Chapter Bookmarks

Finding service information: Search the manual text or use the embedded bookmarks to jump to chapters and subsections. Small connector callouts in the NX420 board photos are easiest to read when zoomed in.

The download is one printable English-language PDF with 206 pages, including nine opening pages for the cover, precautions, manual overview, revision history, and contents, plus a two-page appendix.

Printhead, Paper Feed, and Scanner Service

These selected service topics highlight the repair coverage. The manual also documents PictBridge camera printing on the NX510 and SX410 series and photo restoration on the NX510 series.

• Fault isolation: Motor and sensor checks, fatal errors, paper jams, paper-out and double-feed faults, cartridge recognition errors, abnormal noise, and print or scan defects.
• Printer mechanism: Disassembly and reassembly of the printhead, carriage, CR and PF motors, encoder scales and sensors, automatic sheet feeder, hopper, and paper path.
• Housing and scanner: Removal of the housing and scanner hinges, with separate procedures for the scanner carriage and scanner motor units.
• Boards and power: Main board, panel and LCD, and power supply removal, with model-specific connector assignments and cable routing.
• Service adjustments: EEPROM transfer, initial settings, USB ID and Head ID entry, ink charging, print alignment, and final test-pattern printing.
• Ink system and maintenance: Ink system and waste ink pad replacement, counter reset, printhead cleaning, and lubrication points for the printer and scanner mechanisms.

Epson wrote the manual for experienced repair technicians and specifies Epson-certified technicians for repair work.

Series Differences and Network Troubleshooting

The manual identifies O6-, D4-, D2-, and O2-chip Turbo II printheads and shows which models have a cover-open sensor or a wireless LAN board. The NX420/NX220 chapter documents differences in startup behavior, scanner and panel construction, and assembly removal. It cross-references shared procedures elsewhere in the manual.

Network diagnosis covers wired and wireless LAN on the NX510 series and wireless LAN on the NX420 series. The fault tables address connection settings, software installation, and printing or scanning over the network. Regional cartridge and media tables distinguish destinations such as EAI, Latin America, Europe, CISMEA/Asia, and ECC/EHK where applicable.

Fault Tables and Connector References

The 27 numbered troubleshooting tables connect symptoms such as banding, missing dots, ink contamination, paper skew, scanner streaks, and memory-card or index-sheet errors to specific checks. These checkpoints help a technician distinguish a cable or sensor fault from a failed assembly before ordering parts.

The printer mechanism block diagram and motor and sensor illustration show how the LD and retard rollers, paper-feed drive, ink system, and carriage feedback work together. Startup tables distinguish normal operation from paper-jam recovery, and the scanner section identifies the contact image sensor (CIS) assembly.

The disassembly flowchart shows which assemblies must come out to reach a component. Annotated photos document flat-flex cable and ferrite-core placement. The NX420 connector layout and main board routing views identify the cable paths and connector numbers used in that series.

Electrical coverage goes through connector checks and assembly replacement. Epson directs technicians to separate Service Parts Information (SPI) for exploded diagrams and parts lists.

Calibration and Post-Repair Checks

The adjustment matrix identifies which replacements call for calibration. Pattern examples cover top and bottom margins, first-dot position, head angle, bidirectional alignment, paper feed, and PF banding. Epson’s separate Adjustment Program is required for software-driven adjustments, including motor heat-protection settings and MAC address writing on network models. A MAC address flowchart covers the board replacement cases.

Epson lists a Phillips #1 screwdriver (1080530) and acetate tape (1003963) among the disassembly tools. Removal views give screw-specific torque values, and the lubrication section identifies G-45, G-71, and G-74 by Epson code and application point. The work-completion checklist covers printing, paper feed, scanner movement, adjustments, lubrication, ROM version, and packing.

The printhead procedure identifies the permanently fitted cartridge-cover hinge as a replacement item. Handling notes explain how contamination can interfere with the carriage and feed encoders and how poor support can deform the main frame or damage the paper-guide rollers or nozzle surface. The electrical precautions cover power isolation, ESD protection, and the conditions for energized checks.

Sample Sensor and Scanner-Motor Checks

For the NX510 series, the paper-edge sensor table gives a signal below 0.4 V when no paper is detected and above 2.4 V when paper is detected, measured at CN15 pins 1 and 2.

The NX510 scanner carriage motor specifications distinguish two suppliers. At 25°C, the specified coil resistance is 43 Ω ± 10% for the OKI motor and 38 Ω ± 10% for the MITSUMI motor.