This is a service manual for the Epson Impact Dot Matrix Printer Epson LQ-670, providing detailed product description and operation instructions.
This service manual provides detailed information for repairing and maintaining the Epson LQ-670 impact dot matrix printer. It includes specifications, theory of operation, safety precautions, and step‑by‑step procedures for disassembly, adjustment, and preventive maintenance.
The manual is organized into chapters covering General Description, Operating Principles, Disassembly and Assembly, Adjustment, Troubleshooting, Maintenance, and an Appendix with connector pin assignments, circuit diagrams, and exploded views. Technicians can use the document to diagnose faults, replace components, and ensure the printer operates within its design parameters.
| Printing speed | High speed draft 300cps, Draft 250cps, LQ 83cps at 10cpi |
|---|---|
| Input buffer | 64 Kbytes |
| Acoustic noise | 55 dB(A) (ISO7779 pattern) |
| Interface | Bi‑directional parallel (IEEE‑1284 nibble mode supported) |
| Printable area | 70 lines at A4 |
It can print at high‑speed draft 300 cps, draft 250 cps, and LQ 83 cps at 10 cpi.
It uses a bi‑directional parallel interface (IEEE‑1284 nibble mode supported).
The acoustic noise is rated at 55 dB(A) according to ISO 7779.