Citizen CT-E301 drivers, receipt printing and POWER/ERROR light checks

CT-E301 not printing: device, connection and job

Run the printer’s own self-test

Load suitable paper and close the cover. Hold FEED while turning power on; keep FEED held for about one second until the buzzer, then release. The self-test prints the model, firmware, interface/buffer and memory-switch settings and fonts. POWER normally needs a 2–3 second hold to switch power. A successful self-test with a failed computer job narrows the problem to the connection, selected queue, port, application or driver; it does not identify the driver alone.

TR only: print the LAN configuration

On the Ethernet-equipped model, press the rear panel button to print network settings. Compare the reported address with the computer’s printer port. The manual distinguishes this from holding the button and repeating the hold: that resets saved network settings. Do not use the reset to obtain a report. A DHCP address can change after restart.

The rear yellow LAN LED is lit for link and flashes during transfer. Green is lit at 100 Mbps; green off can mean 10 Mbps as well as no connection. It does not by itself prove a disconnected cable. These rear LEDs differ from the front POWER/ERROR pair.

Read the front lights together

The official error table gives different waveforms for several conditions. The selected groups below intentionally do not invent flash timing or numbered service codes. Memory Error’s ERROR column is “–”, not an explicit off state. Buzzer behaviour depends on memory-switch settings, so silence does not rule out an error.

Symptoms and the next check

Power or service indications

Power setup requires the specified AC adapter and secure connectors. Disconnect the wall plug before reseating its power connector. Persistent voltage, system or memory indications need the recorded light pattern and qualified support; changing a Windows driver does not repair the printer’s power circuit.

Thermal side, cover and 58 mm partition

Load the printable face upward, over the anti-curl damper, pull a few centimetres straight out and close at the centre until it clicks. Keep the outlet clear. For 58 mm paper, power off before fitting the supplied partition and set the print area accordingly. The manual says to dedicate a printer used with 58 mm stock to that size: returning to 80 mm can impair feeding/printing. The app’s receipt width and margins are common job-setting checks.

Clear a cutter jam safely

The cutter procedure uses power off, opening with the lever, removing the roll and all scraps, reloading, closing and powering on. Let the hot head cool and avoid the blade. The error section also calls for FEED with the cover closed after removing the cause. If the cover will not open or the cutter stays blocked, stop and use qualified support; do not pry or dismantle it.

Head/platen cleaning differs from exterior disinfection

Turn off, unplug and wait a few minutes for cooling, then wipe head/platen dirt with an ethyl-alcohol-dampened cotton swab. Avoid fingers and metal tools. The disinfectant-ready housing claim is not permission to spray or soak the inside.

Allow thermal protection to recover

Dense black output, continuous jobs and a hot environment can trigger head cooling. Wait for automatic restart and keep the paper outlet clear. Repeated or persistent faults need a pattern/photo and model information for support rather than an assumed driver reinstall.

Hex dump is not normal self-test

Hexadecimal dump starts with the cover open during the FEED/power sequence and prints raw received data. Normal commands do not run in that mode. Exit by pressing FEED three consecutive times or powering off. For normal-mode jobs, compare the application’s interface/serial settings and command language as common POS checks. Preserve memory/network settings before any technician-led change.