The printed text appears faint. The built-in printer uses thermal printing, which applies heat rather than ink. Could you first try the following steps?
1. Open the roll paper compartment
2. Gently wipe the metal plate (just below the cutter) with an alcohol-based wet wipe
3. Check the paper feed roller and feed path for any debris or dust; remove if present
4. (If steps 1-3 do not resolve the issue) The roll paper may be degraded; replace with a new roll
Printing is not possible. Please try the following steps in order, checking after each one whether printing is possible.
1. Confirm the roll paper is loaded in the correct orientation
When positioned with the screen facing towards you and the printer cover at the back, the edge of the roll paper should be facing towards you. If incorrect, reload the roll paper in the correct orientation.
2. Ensure the “paper feed roller” is correctly installed, with the gear-like edge positioned on the left side.
3. Check whether there is sufficient paper remaining on the roll
Deteriorated roll paper is more prone to jamming. Open the roll paper compartment to inspect the condition of the roll paper. If you notice signs of deterioration, such as discolouration, replace it with a new roll and try printing again. Additionally, store the roll paper in a cool, dark place, avoiding high humidity, high temperatures, and direct sunlight.