Tektronix 2445, Инструкция по эксплуатации

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Maintenance— 2445 Service
4. Clean switches with isopropyl alcohol and wait 60 sec­
onds for the majority of the alcohol to evaporate. Then com­
plete drying with low-pressure air.
To p reven t dam age from electrical arcing, ensure th at
circuit boards an d com ponents a re d ry before apply­
ing p o w e r to the instrum ent.
5. Dry all components and assemblies in an oven or dry­
ing compartment using low-temperature (125° F to 150° F)
circulating air.
CLEANING. To clean the interior, blow off dust with dry,
low-pressure air (approximately 9 psi). Remove any remain­
ing dust with a soft brush or a cloth dampened with a solu­
tion of mild detergent and water. A cotton-tipped applicator
is useful for cleaning in narrow spaces and on circuit boards.
LUBRICATION
If these methods do not remove all the dust or dirt, the
instrument may be spray washed using a solution of 5%
mild detergent and 95% water as follows:
There is no periodic lubrication required for this
instrument.
SEMICONDUCTOR CHECKS
E xceptions to the follow ing procedure are the A tten u ­
a to r assem blies an d the F ro nt-P anel m odule. C lean
these assem blies only w ith isopropyl alcohol as de­
scribed in step 4.
Periodic checks of the transistors and other semiconduc­
tors in the oscilloscope are not recommended. The best
check of semiconductor performance is actual operation in
the instrument.
1. Gain access to the parts to be cleaned by removing
easily accessible shields and panels.
PERIODIC READJUSTMENT
2. Spray wash dirty parts with the detergent-and-water
solution; then use clean water to thoroughly rinse them.
To ensure accurate measurements, check the perfor­
mance of this instrument every 2000 hours of operation, or
if used infrequently, once each year. In addition, replace­
ment of components may necessitate readjustment of the
3. Dry all parts with low-pressure air.
affected circuits.
N O T E
Complete Performance Check and Adjustment instruc­
M o s t o f the sw itches used in the 2 4 4 5 a re sealed an d
the contacts a re inaccessible. If cleaning is deem ed
necessary, use only isopropyl alcohol.
tions are given in Sections 4 and 5. The Performance Check
Procedure can also be helpful in localizing certain troubles in
the instrument.
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