Maintenance - ADEMCO 6220 User Manual

it is desirable to eliminate the two blank lines
so the graphic characters connect together.
Sending a CHR$(17), which is control code 17,
anywhere on a line of data will stop the printer
from putting space between that line and the
next. If a CHR$(17) is not on a print line, the
normal space between lines will be printed.
The mechanism used in the printer will print one
Dot Graphics
line of dots across at a time. This means that
Code 18
when it prints one line of characters, it has
actually printed ten lines of dots where the first
eight lines make up the character and the last
two lines are blank for the space between
character lines. By using the CHR$(18) control
code, you can tell the printer which dots to print
for one whole dot line. Since there are 144 dots
per line, you must follow the CHR$(18) control
code with 144 bits of information. For every
place there is a one in the 144 bit pattern you
send, the printer will print a dot. Rather than
receive one bit at a time, the printer expects to
receive the information eight bits at a time. This
means that after receiving a CHR$(18) the next
eighteen 8 bit characters it receives will be
printed as dots to form one dot line.
To figure out the dot pattern values to send after
the CHR$(18), you will need some grid paper. A
large sheet with 144 grid boxes across would
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Maintenance

When printing becomes faint or difficult to see,
replace the ribbon in your printer with an Epson
ERC-09 cartridge ribbon.
If your printer is used infrequently, the print
impression may become weak because the
ribbon dried out. To advance the ribbon to a new
section, hold down the paper feed switch for
several seconds.
Changine the
Below are the steps for replacing the ribbon:
Printer Ribbon
1. Turn the printer offline.
2. Four small grooves are embossed on each
side of the printer cover. Push down on one
or both of these areas until the printer cover
tilts.
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