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5.
Performing
the Printer
Power-On
Test
Please
do
NOT
turn
on your computer
until after
you
have completed
the
next
two
sections.
a.
Turn on your
printer.
The
print
head
should
move
to the
center of
the carriage
automatically
and
then
return
to
the
original position.
If
this
doesn't
happen,
move
to step
"b".
b.
If
the print
head
does not
move
as
described above,
check
to see
if
the
connecting
cable
is
properly plugged
in.
Then
turn
on your
printer
and
try
the
test
again.
6.
Performing
the
Print
Head
Test
You
can
test
the print
head and
ribbon
ONLY AFTER
INSERTING
PAPER.
DO NOT
PRINT
WITHOUT
PAPER;
it
could
easily
damage your
print
head.
To
perform
the
test,
simply switch
the self-diagnostic
switch
to
"T"
(shown
in Fig. 2.9).
The
printer
will
continue
to print
all
the characters
available until 1)
the printer
is
turned
off;
or 2) the
self-diagnostic
switch
is
"flipped"
to position
4
or
5.
When
the printing
is
finished,
remove
it
from
the
machine and examine
it
for defects. Please
report
any problems
immediately
to
your
local
Commodore
dealer so that
your
printer
can be
properly
serviced.
A
typical
printout
for the
VIC 20
is
shown
below.
2.9:
Test
Position Selected
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2.10:
Sample
Printout
12.
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