Tips for using dot matrix printer

I remember that there was a problem with a user ’s stylus printer. The financial department was on his side. She usually can replace the ribbon. She can easily complete it. This time the machine broke down. What he described is that I just appeared after replacing the ribbon. The printed font is very light. I do n’t know why. It used to be replaced in the past but there was no problem. After asking by phone, the problem was basically judged. It should be that he adjusted the paper thickness adjuster next to the ribbon. At the highest point, he printed and tested a single sheet of paper, but the number of sheets he adjusted was 7 sheets of thickness, so the print was very light. After this explanation, the user finally understood, and then asked the adjustment lever at Which, the later notification is considered to solve the problem. In fact, just now this user is a typical use problem, and does not understand the machine, so causing such a problem, it can be said that this problem is not a problem at all, the user only needs to know more about the function of the machine to easily deal with it, so said Learning a bit of usage skills can be very helpful to users, so I wo n’t go into more details. Let ’s take a look at some of the cases and usage tips organized by experts below.

Learn from the shallow to deep needle printer repair

As the saying goes, "The best way to learn is to sum up from failure." Maybe there is no magic bullet that can quickly make you a maintenance engineer for injections, but familiarity and understanding of some troubleshooting will definitely allow you to quickly advance to the maintenance of injections. In this case, the author will summarize the common faults in needle injection as follows, to provide you with the necessary reference to quickly advance to professional maintenance professionals.

Since the troubleshooting will take Epson as an example, the factory settings introduced first are restored:

How to restore the factory settings of the LQ-1600Kâ…¢ machine: 1. Press and hold the "Font" + "Cut / Paper Slot" keys to turn on the printer. The printer emits a long beep and then releases.

2. After replacing the 93C46 chip with an "empty film", turn on the computer in sequence (4 times) to restore the data so that the printer can print normally: a. Press the "Font" + "High Speed" key to turn on the power, and release after buzzing; b .Press "" Font "+" Paper Cut / Paper Slot "key to turn on the phone and release it after beeping; c. Press" High Speed ​​"+" Paper Cut / Paper Slot "key to turn on the phone and release it after the tweet; + "High-speed" "cutting / paper chute" button to turn on, release after beeping.

Failure level of LQ-1600Kâ…¢ machine:

1. The power-on indicator is off or only the "Song" light is on, but the fan does not rotate or rotate, and the first-level fault 2. The power-on indicator flashes or flashes for 2 seconds, and the second-level fault 3. The power-on indicator is full Uninterrupted, ** Fault 4. Power-on indicator flashes (interval 0.5 seconds), level 4 fault

Trouble one: EPSON LQ-1600Kâ…¢ boot indicator does not light, the fan does not rotate

Troubleshooting: The printer motherboard "does not start" (power on light is on / off, the head does not move, + 5V, + 35V (VH) voltage is normal) Repair steps: 1, use 95% alcohol (available in medical malls) cotton balls Wipe the suspicious points on the motherboard; 2, re-solder the suspicious points. Note that the CPU, gate array, etc. are the key points of welding; 3. Find the broken wire and connect it; 4. Heat the motherboard chip (CPU, gate array ..) with a hair dryer to see if you can reset the printer to start to find the suspicious chip; 5. Use an oscilloscope and a logic pen to check whether the signals of 0–D7, A0–A1 on the motherboard chip are abnormal (leakage) of ALE, CS, CE, OE, WR, RD, etc. – find the suspicious chip; 6, use the CPU on the motherboard, door Array and other chips and the maintenance motherboard chip swap test to confirm whether the chip is bad;

Metabolism EpsonLQ-1600K3 Needle Exchange Guide

The EPSON LQ-1600K3 printer is a printer with a very high utilization rate on the market. Its biggest feature is the strong penetration of the print head, which can print multiple layers of printing paper, and the use cost of printing consumables is extremely low, and the maintenance and repair costs Very low. So this type of printer is the favorite of many users.

As a needle printer, the inevitable needle breakage has become the most troublesome fault for our users. However, our ordinary customers dare not try to change the needle by themselves, fearing that they will cause greater problems due to their mistakes. In fact, as long as you are bold and careful when changing needles, any of us can be very good to restore the printer to health. Below we will introduce the needle replacement method of K3 printer in detail.

First, we must first determine which needle is broken, so that we can find the problem needle from the 24 identical needles. The method of finding the broken needle is very simple-1, it is visual inspection, most of the needles can be found by visual inspection of the problem needle {observe the left side of the picture with the eye: front panel, see which needle is vacant or depressed}; 2. Use special printing needle test software (this method is the most scientific and easiest), use the program test, you can clearly see the test results on the printing paper, which one is not printed, it should be the line There must be a problem with the print needle or the coil. If you do not hear the "squeak" sound that is printed in other lines when printing this line, it means that the corresponding coil has been damaged (we only discuss the repair of the print pin here, so it is excluded that the print head cable is not connected, the print head on the main circuit board (The coil drive tube may be damaged)

Analysis of four common types of dot matrix printers

Dot printers make no difference on the surface, but with the need for specialization and specialization, different types of dot printers have emerged, mainly including general purpose dot printers, passbook pin printers, line pin printers and There are several types of high-speed needle printers, the following highlights the characteristics, performance and technology of these types of printers.

Universal dot matrix printer

The universal pin printer is a very widely used Chinese character printing device in the early days. The number of pins in the print head is generally 24 pins. There are two types of wide and narrow lines. The print head slides back and forth on the metal rod to complete the horizontal line printing. The maximum printing width is 33cm, the standard printing speed is generally 50 Chinese characters / second, the resolution is generally 180dpi, the ribbon printing is used, and the paper can be fed by friction and drag. It can print single pages or perforations. Consumables such as folding continuous paper, ribbons and printing media are inexpensive. Due to the electromagnetic impact, the print head generates severe heat during continuous printing for a long time, but the printing speed is not fast, and the impact is not significant; and because the general-purpose needle printer is generally a wide format printer, compatible with the DOS system, it is particularly suitable for report processing. Many general offices and financial institutions.

The general-purpose needle printer is easy to use. If the ribbon and paper are of poor quality or improperly installed, the needle will break easily. When the printed characters are too light, it means that the coloring ability of the ribbon is reduced, and needle hanging and paper blocking are easy to occur. At this time, the ribbon must be replaced. In addition, the ribbons of general-purpose stylus printers are not uniform and cannot be substituted for each other. Universal pin printers have a manual adjustment lever to adjust the thickness of the paper. When the thickness of the printing paper changes, the thickness adjustment lever must be adjusted to adjust the printing depth and protect the printing needle.

Passbook dot matrix printer

With the electronic development of various industries, the passbook pin printers used exclusively for the counter business of service departments such as banks, post and telecommunications, and insurance have been rapidly promoted and applied. The so-called passbook pin printers are also called bill pin printers, and other Compared with the general-purpose stylus printer, the passbook stylus printer has the following characteristics:

Flat-push paper feed: The flat-push paper feed path design reduces printing deviations caused by paper bending and paper jams, makes paper advance and retreat easy, and makes it possible to handle extra-thick print media.

Self-adaptive paper thickness: The printing object of the passbook needle printer is a passbook and other bills, and the thickness of different passbook bills is different, so the passbook needle printer requires automatic adjustment of the printing gap and the impact strength according to the printing medium of different thickness to achieve Clear printing effect of any thickness.