SECTION III OPERATOR MAINTENANCE PROCEDURES

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