DMP-207  (260-2917)          Maintenance               Faxback Doc. # 6687

The DMP 207 printer was designed to give you long and trouble-free service
with minimal operator care.  Consequently, maintenance procedures for this
printer are few and simple.  If you followed the suggestions in Chapter 1
for locating your printer in a clean, climate-controlled area, and give a
little regular attention to the items covered in this appendix, you will
get the best possible performance from this sturdy printer.

     Changing the ribbon cassette

     Cleaning

     Alarms

     Troubleshooting

     Running test sheets

Changing the ribbon cassette

The ribbon in the cassette is a continuous loop and will print
approximately 2 million characters before it needs replacement.  The DMP
207 uses a ribbon cassette with a continuous nylon ink ribbon.

In addition to the normal black ribbon, a color ribbon is available.

Black Ribbon:  Cat. No. 26-2824
Color Ribbon:  Cat. No. 26-2826

Note:  Other ribbon cassettes are available that fit in the DMP 207; do
       not use these.  They will not produce satisfactory printing results
       and may damage the printhead.

       The use of re-inking kits is discouraged, for the ink does not meet
       the specifications for the 24-pin printhead of this printer.

When it is time to change the ribbon, you will find the procedure is quick 
and easy.  Follow these steps:

     1.  Turn off printer.

     2.  Remove the top cover as explained in Chapter 1.

         Be sure the printhead is cool before performing any procedures
         inside the printer.

     3.  Slide the printhead to the center.

     4.  Snap out the old ribbon cassette.

         Carefully follow the instructions for correct ribbon placement.
         Improper placement can cause smudged printing and may jam the
         ribbon.

     5.  Remove the new cassette from the packaging and position it over
         the printer opening with the ribbon knob aligned over the post
         protruding from the left end of the floor of the printer opening.

     6.  Lower the ribbon cassette into place and ensure that it is
         detented on both ends.

     7.  Slide the ribbon down into position between the printhead and the
         metal ribbon mask.  This is easy to do!  Do not try to make this
         step harder than it is by incorrectly forcing the ribbon between
         the ribbon mask and the ribbon guide (the black plate closest to
         the platen).

     8.  Advance the ribbon until there is no slack.  The ribbon knob
         turns in only one direction, clockwise.  An arrow on top of the
         cassette reminds you to turn it this way.

     9.  Slide the printhead right and left a few times to be sure that it
         moves smoothly without snagging the ribbon.

    10.  Reinstall the top cover.  That's all there is to it.  Your
         printer is ready to get back to work!

Cleaning

The printer cover keeps out most of the dust and dirt that accumulates in
operating areas.  However, it is still a good idea to periodically clean
out paper dust and other stray particles that may find their way into your
printer.  Dusting the outside of the printer occasionally reduces the
incidence of foreign matter in the printer opening.

Note:  If the DMP 207 is used heavily or in a dusty environment, consult
       your local Radio Shack store for advice on yearly cleaning and
       lubrication.

     1.  Turn off printer.

     2.  Wipe the outside of the printer with a lint-free cloth that has
         been moistened with a mild detergent solution.

     3.  Remove the top cover.

         Be sure the printhead is cool before performing any procedures
         inside the printer.

     4.  Snap out the ribbon cassette.

     5.  Use a soft brush to whisk paper lint and dust away from the area
         around the platen, printhead, and carriage shaft.  Move the
         printhead from one side to the other to give you access to all
         areas.  Take care not to damage any of the cables and pulleys.

     6.  Wipe the surface of the platen with a soft cloth dampened with
         ethyl alcohol.  Rotate the platen with the paper feed knob
         (turning clockwise) in order to clean the entire surface.

     7.  Reinstall the ribbon cassette as described in the previous
         section.

(ALL-06/28/94)