FAQ
If you would like to quickly learn about other issues, feel free to continue browsing.
The printer is outputting blank paper?
1. For dot matrix printers, the most common causes of blank printouts include dried-out ribbon ink, broken ribbons, or a damaged print head. In such cases, the ribbon should be replaced promptly, or the print head repaired (in most instances, replacing the ribbon alone will resolve the issue).
2. For inkjet printers, frequent issues leading to blank prints are typically due to clogged nozzles or empty ink cartridges. To address these problems, the print heads should be cleaned, or the ink cartridges replaced (it is recommended to try replacing the cartridge first).
Is the printer output turning black?
1. For dot matrix printers, the causes of this malfunction include ribbon shedding, excessive ink on the ribbon, a dirty print head, poor ribbon quality, and the pusher being adjusted too closely.
When troubleshooting, first adjust the position of the pusher. If the issue persists after this adjustment, replace the ribbon and clean the print head; typically, these steps will resolve the problem.
2. For inkjet printers, focus should be placed on inspecting whether the print head is damaged, checking for any cracks in the ink tubes, and verifying that the ink type used is appropriate.
When printing, the text appears clear on one side but unclear on the other.
**Reason:** This phenomenon typically occurs with dot-matrix printers, though inkjet printers may also experience it, albeit at a lower frequency. The primary cause is the misalignment between the print head guide rail and the printing roller, resulting in uneven spacing between the two components.
**Solution:** Adjust the distance between the print head guide rail and the printing roller to ensure they are parallel.
**Specific Steps:** Loosen the adjustment plates on both sides of the print head guide rail. Rotate the adjustment plates counterclockwise to reduce the gap, and continue fine-tuning until the print head guide rail and the printing roller are perfectly aligned. This will effectively resolve the issue.
Repeated stains appear repeatedly on the printed paper.
1. Dot Matrix Printer
Reason: The recurring issue of smudging is mostly caused by ribbon shedding or excessive ink buildup.
Solution: Simply replacing the ribbon cartridge will resolve the problem.
2. Inkjet Printer
Reason: Repeated smudging occurs due to ink leakage from the ink cartridge or ink delivery tube.
Additionally, when the nozzle performance deteriorates, the ejected ink fails to separate properly from the residual ink, leading to a balanced state and causing ink leakage.
Solution: Replace the ink cartridge, ink delivery tube, and nozzles.
Printing produces garbled characters.
Whether it's dot matrix printers or inkjet printers experiencing garbled print output, the issue is most often caused by damage to the printer interface circuitry or failure of the main control microcontroller.
However, during actual troubleshooting, it has been observed that interface circuit failures are relatively common. This is because the interface circuitry relies on a low-voltage power supply; thus, any momentary high-voltage static electricity generated when plugging or unplugging the interface under power can easily cause the interface chip to break down. Typically, simply replacing the interface chip resolves this type of malfunction.
The printer is experiencing paper jams or failing to feed paper.
The most common printer malfunction is paper jams. When this occurs, the indicator light on the operation panel will illuminate and send an alarm signal to the host computer.
Other potential causes include foreign objects in the paper output path, malfunctions in components such as the feed rollers, failure of the paper tray to feed paper properly, or sensor malfunctions.
Resolving this issue is straightforward: simply open the machine cover and remove the jammed sheet. However, it’s crucial to note that you must retrieve the paper in the direction it was fed—never attempt to turn any knobs in the opposite direction under any circumstances.
If paper jams occur frequently, inspect the paper feed channel carefully, clearing any debris from the output path. Ensure that the leading edge of the paper aligns precisely above the metal plate. Additionally, check whether the output rollers are worn out or if their springs have loosened, resulting in insufficient pressure to reliably feed the paper into the machine.
In cases where the output rollers are worn but cannot be replaced immediately, you can temporarily address the issue by wrapping a rubber band around them. This improvised solution increases the friction between the roller and the paper, allowing normal feeding to resume.
Finally, improper installation of the paper tray, as well as poor paper quality (e.g., paper that is too thin, too thick, or damp), can also lead to paper jams or difficulties in removing sheets.
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