Servicing; Introduction; Troubleshooting Information - Tektronix 4010 Maintenance Manual

Section 3-4010 Maintenance
SERVICING
INTRODUCTION
Beyond the need for occasional cleaning of the face of
the display and other outer surfaces of the Terminal, there is
virtually no need for routine servicing of the Terminal. It
has no lubrication points, no air filters, and (with the
exception of the CRT) no vacuum tubes. The solid-state
components provide stable operation, with little need for
routine adjustment.
However, if a routine schedule and procedure is desired,
a one-year interval and the following sequence is
recommended. The disassembly and assembly instructions
contained in this section should be referred to as necessary.
Servicing Procedure
(1) Disconnect the line cord from the power source.
(2) Unbolt the display unit from the pedestal and set
them adjacent to each other on a work surface.
(3) Remove the top from the display unit and the front
from the pedestal.
(4) Using a vacuum cleaner, remove dust accumulation
from within both units. Use a soft-bristled brush to loosen
dust which won't otherwise vacuum out. A soft cloth and a
mild soap and water solution can be used to remove any
really stubborn dirt.
(5) Inspect the interior of both units for broken leads,
loose connections, heat damaged components, etc. Correct
as necessary. Investigate the cause of any heat-damaged
components.
(6) Remove the graticule mask and the filter from the
front of the display screen. Then wash the face of the CRT
and the back surface of the filter, using a soft cloth and a
mild soap and water solution. Then replace the filter and
graticule mask. THIS STEP SHOULD NOT NORMALL Y
BE NECESSARY, SINCE A NEOPRENE MOUNTING
RING SEALS THE SPACE BETWEEN THE FACE OF
THE CRT AND THE FIL TER. IT IS RECOMMENDED
ONL Y IF DIRT IS VISIBLE BETWEEN THE TWO
SURFACES, OR IF THE DISPLA Y APPEARS EXCES-
SIVEL Y DIM AND DIRT ACCUMULATION IS
SUSPECTED.
(7) Perform the check-out procedure found in this
manual. Perform the adjustment procedure if the check-out
procedure indicates that it is necessary.
(8) Put the covers back on the display unit and on the
pedestal. Install the display unit on the pedestal, if desired.
(9) Clean the outside of the units, using a soft cloth and
a mild soap and water solution. Use particular care in
cleaning the external surface of the display filter.
Mounting the Display Unit on the Pedestal
Fig. 3-1 provides details for mounting the display unit
on the pedestal. The units can be separated by reversing the
procedure.
TROUBLESHOOTING INFORMATION
Troubleshooting of the Terminal can be done best if the
various features of this manual are used to their fullest
advantage. These features and recommended usage are
listed here.
Controls and Operation. This
information insures
operator understanding of the Terminal features and
operation.
Specification. A complete explanation of the Terminal
capabilities is contained in the Specification, along with
explanations of how to put the capabilities into use.
Performance Check. This provides a rapid means of
checking for proper operation in a logical sequence under
normal equipment configuration. It can also be used with
the options and the interface unit removed, to indicate
operating status of the basic Terminal.
Adjustment. The procedure follows a logical sequence
of adjusting the basic Terminal (including verifying non-
adjustable features).
3-1