Radio Shack 26-1154A Service Manual page 41

SECTION
5
ADJUSTMENTS
5.1
INTRODUCTION
The printer must be adjusted to correct certain malfunctions or to
correct marginal operation.
Adjustment procedures should also
be performed
whenever an affected
part
is
replaced
in the
printer. The following adjustment
procedures are contained
in
this section.
o Printer Head Gap Adjustment
o Platen Adjustment
o Line Feed Solenoid Adjustment
o Rotor /Hall Effect Sensor Clearance Adjustment
o Print Density
(Speed) Adjustment
All of the procedures contained
in this section are performed with
the printer covers removed.
Refer to paragraph 4.4.1 for the proper procedure.
Only
the Print
Density
(Speed) adjustment
is
performed with power
applied to
the printer.
As this procedure
is
performed with
the covers
removed, care must be taken to avoid personal contact with moving parts of the
printer
or to areas of the
printer circuitry where dangerous voltages
are
present.
WARNING
Care must be taken when adjusting the
printer with the covers removed and
power applied to the printer
as injury
can result from contact with moving
parts of
the
printer
or
areas within
the printer where dangerous voltages
are present.
Before performing any of the adjustment procedures contained
in this
section, the entire
procedure should
be read carefully
to assure that the
procedure
is understood, that the appropriate tools and accessories are
available, and that the appropriate care
is
exercised when performing
the
adjustment.
5.2 TOOLS AND ACCESSORIES
The procedures contained in this section require the following tools
and accessories:
Tools
1/4-inch common screwdriver
1/4-inch nutdriver
5/8-inch nutdriver
5-1