Question about Epson FX 890 Matrix Printer
I have tvs msp 250 champion. my printer printing in the same line paper roller not rolling while printing but the paper is feeding at first.
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Posted on Jan 02, 2017
Assuming that you are feeding the paper into the correct end of the printer :), it seems that the printer is defective, but
First unplug the printer from the wall, wait a few minutes,
and see if it resets. If that does not work, read on.
are controlled by "Stepping Motors"
Unlike an ordinary DC motor with two wires, that spins
clockwise or counter clockwise depending on the voltage
a stepping motor contains several pairs of wires, that
are pulsed in a controlled sequence, causing the motor
to spin in precise angular steps. Depending on the
number of wire pairs (poles) and internal gears, the
stepping motor can have a resolution as course as
90 degrees, and as fine as 0.05 degrees per step,
depending on the cost and applications.
Linear stepping motors can even move an object in
a straight line.
The benefit of these stepping motors is that, unlike a
linear servo motor, they do not need complex positional
feed-back for precise control, they simply step as many
times as you tell them to. Four steps left, two steps back
ultimately controlled by a central processor within the printer.
Depending on the printer model, and how sophisticated
the printer's internal processor is, the paper and head
movements can be either automatically controlled by
SOFTWARE (firmware) within the printer itself, or by the device drivers installed in Windows.
The more self-sufficient the printer is, of course, the less
hassle and CPU overhead on your PC.
a) Skip steps
b) Get stuck
c) Oscillate back and forth
d) Spin backwards.
a) One bad wire in the ribbon connecting the motor
to its controller board.
b) Bad motor driver transistor: Open or shorted.
c) Bad data line from the printer's internal control
processor to the driver transistor array.
d) Bad processor chip, memory or firmware within
the printer, e.g. a burned out register or firmware
e) Defective internal power supply, causing everything
else to malfunction.
f) Bad paper position sensor
d) Crashed control program, which is probably the
only thing that is fixable:
i) unplug the printer from the wall socket, wait a
few minutes, and see if it resets.
the Window drivers are corrupt but this is very unlikely.
Is one of the motor windings open or shorted ?
Is one of the driver transistors fried ?
This very much depends on your level of skill, and the test equipment you have to work with. If you don't have a decent oscilloscope you will not get far. Without a digital multimeter you will not get anywhere at all.
Call the manufacturer, scream blue murder, accuse them of setting your house on fire and giving your dog diarrhea ....
and see if they will send you a freebee.
Hope this explains it.
Please rate my answers.
Posted on Jul 18, 2008
SOURCE: paper won't feed
My CX4800 developed the same problem. It was an excellent machine until then. I tried everything I could think of, and finally decided it must be the rather large feed in rollers at the right of the paper bin (one below and one above the paper) that had worn too smooth to pull the paper in. It works fine if I will give the sheet a "push" when it starts to go down - but who has time to stand there and push each piece in! It would really be nice if Epson would provide us with inexpensive replacement rollers and instructions for installing them. Guess they had rather we just buy a new printer - which I did, a CX7800, only to find that it will not take the heavy weight photo paper. :-(
Sorry I couldn't help more.
Posted on Aug 04, 2008
SOURCE: drivers for printer
just goto google site and write " free drivers for dotmatrix printer Tvs 250 Msp Champion model u will get ur driver there
or go to www.freedriver.com
Posted on Mar 04, 2009
Okay.. 1st off I'm probably going to the jumped on for this... But.. I fix and/or make them work printers, computers and all sorts of electronic gear. For a living... Yes .. the manufacturer will tell you not to use alcohol to clean the rollers. but it does work. Windex (ammonia) will clean the heads at times. I also use Scotch brite pads to clean the pickup rollers. We get them in about 8x10 inch pads.
I will spay some alcohol on the end where the pick up roller is. Place the pad in normal paper tray. Most printers have a cam shaped one on the right, left or in the middle. That gets the paper moving. The pad is way to thick to actually move and will cause a jam indication on the printer. But what happens is the roller will slip on the pad and clean itself. Pretend you cleared the jam a couple of times and the printer will try to pick up the 'paper' and jam again. A couple of these and the pick up roller (cam shaped) will usually be good to go. The other option (the best) is to buy a new pickup roller for the printer. But cleaning will work for the short term. What happens on most printers is the roller gets very smooth from normal use and then won't pick up the paper for the rest of the trip through the printer. I have used a piece of fine grade sand paper, but you have to hold it so it won't go through the printer and it makes a gritty mess... Once I orderd a 'printer cleaner' from HP and all it was, was a couple of pieces of scotch brite glued to a fancy holder to match the spacing of the rollers. That's when I started using sheets of the stuff. Just pretend they are a piece of printer paper. In the worst case I have used belt dressing and then alcohol to clean most of it off. Alcohol has a tendency to soften the rubber on the pickup roller. That's why the company says don't use it. But you can by rubber rejuvenator that is mainly alcohol.. Go figure.........
Posted on Mar 21, 2009
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