TM 5-6635-386-12&P
SECTION III
OPERATOR MAINTENANCE PROCEDURES
WARNING
Do not attempt tester repairs. A faulty tester must be
returned to a designated manufacturer’s repair facility.
NOTE
•
This section applies to basic maintenance to be
performed by the field operator with a minimum
of tools and equipment and with a minimum
electronics knowledge.
•
Maintenance covered by Section III involves only
the use of common hand tools.
•
Report any defects with the tester to the LRPO.
3-1.
GENERAL
The tester requires little maintenance other than an
occasional cleaning of the shutter and replacement of
batteries.
a. Service problems will occur In three areas:
(1) Batteries.
(2) Mechanical jamming of shutter needs
cleaning.
(3) Electronic parts failure.
b. CPN testers minimize service problems in
these three areas by careful design: (1) Batteries are
replaceable with NICAD batteries, NSN 6140-00-497-
0490.
(2) The shutter mechanism uses a quick release
cleanout plate for ease of cleaning.
(3) Electronics use CMOS circuits for long life
and low current drain.
3-2.
BATTERIES
The tester uses NICAD rechargeable 4 Ampere Hour D
Size cells as standard batteries.
CAUTION
Due to excessive damage caused by
battery leakage, only NICAD batteries,
NSN 6140-00-497-0490, will be used as
replacement. Quantity of eight (8) each
should be ordered.
3-3.
CHARGING (Fig. 3-1.)
Charge NICAD batteries only. Do not use alkaline or
zinc-carbon cells!
Figure 3-1. Charging
3-1
