Atec Tektronix-1502 - Manual (Page 57)

TM 9-4935-601-14-3&P
MAINTENANCE
NOTE
It is recommended that the 1502 be serviced at a Tektronix Service Center. The
instrument should be serviced by a technician skilled in sampling and pulse
techniques.
This section of the manual provides information used for preventive maintenance, corrective maintenance,
and troubleshooting the 1502. The physical location of all circuit components on the circuit boards are shown
on the circuit diagram pullouts.
Preventive Maintenance
Preventive maintenance consists of cleaning, visual inspection, lubrication, etc. Preventive maintenance
performed on a regular basis will help improve the reliability of the instrument. The severity of the environment
to which the 1502 is subjected determines the frequency of needed maintenance. A convenient time to
perform preventive maintenance is preceding recalibration of the instrument.
Cleaning
Accumulation of dirt in the instrument can cause overheating and component breakdown. Dirt on
components acts as an insulating blanket and prevents efficient heat dissipation. It also provides an electrical
conduction path.
Interior. The 1502 construction protects the interior of the instrument from dust.
The interior of the 1502 should not normally require cleaning unless the unit has been left with the front
cover removed and the plug-in compartment empty. The best way to clean the interior is to blow off the
accumulated dust with low-pressure air. Remove any dirt that remains with a soft brush or a cloth dampened
with a mild detergent and water solution. A cotton-tipped applicator is useful for cleaning in narrow spaces on
circuit boards.
NOTE
To remove the instrument cabinet, see Preliminary Procedure at the beginning of
the Calibration procedure. When the cabinet is removed, the watertight feature
may be compromised when the case is reinstalled. See the instructions at the
end of the Calibration procedure on replacing the case on the 1502. Detailed
parts replacement instructions are contained at the end of this section.
CAUTION
Avoid the use of chemical cleaning agents which might damage the plastics used
in this instrument. Avoid chemicals which contain benzene, toluene, xylene,
acetone or similar solvents.
Exterior. The cabinet exterior can be washed with soap and water and rinsed with clear water. Loose dust
accumulated on the front panel is best removed with a small brush or a soft cloth dampened with a mild
detergent and water solution. Abrasive cleaners should not be used on the front panel.
CRT Implosion Shield. The face of the crt can be cleaned by using ISOPROPHYL ALCOHOL applied
and wiped very gently dry with KENDALL"NEBRIL" non-woven wipes.
Lubrication
The reliability of potentiometers, switches and other moving parts can be maintained if they are kept
properly lubricated. However, too much lubricant is as detrimental as too little lubricant. A lubrication kit
containing the necessary lubricants and instructions is available from Tektronix, Inc.
REV DEC 1981
5-1