Harris Atlas DVL400, Technical Manual

Page: 147 / 180

2/25/03 888-2473-001 5-1
WARNING: Disconnect primary power prior to servicing.
ATLAS Series™
Section 5
Maintenance and
Alignments
5
5.1 Introduction
This section contains all of the maintenance and alignment procedures for the Atlas
Series UHF transmitter. This includes Routine maintenance, PA and PS module
replacement, PA Module repair, transmitter calibration and PC Board replacement
procedures.
5.2 PA Module Removal and Replacement
!
CAUTION:
TOXIC BERYLLIUM
SOME COMPONENTS IN THE MODULE CONTAIN TOXIC BERYLLIUM.
THIS LIMITS MODULE REPAIR TO A MODULAR LEVEL CONSISTING OF
PALLETS AND PC BOARDS ONLY.
HOT SURFACE
THE ATLAS PA MODULES ARE DESIGNED TO HANDLE VERY HIGH
TEMPERATURES AND MAY BE EXTREMELY HOT, UP TO 90
O
F (50
O
C)
ABOVE ROOM TEMPERATURE. DO NOT TOUCH THE MODULES WITH
BARE HANDS AFTER THE TRANSMITTER HAS BEEN RUNNING,
ESPECIALLY IN HIGH AMBIENT TEMPERATURE ENVIRONMENTS.
SPECIAL GLOVES HAVE BEEN PROVIDED IN THE REAR OF THE
CABINET OR CAN BE OBTAINED FROM HARRIS, PART #0990006483 OR
GRAINGER ITEM #4JF36.
HEAVY WEIGHT
THE PA MODULE WEIGHS APPROXIMATELY 21KG AND CAN BE
AWKWARD TO HANDLE. USE PROPER LIFTING TECHNIQUES WHEN
REMOVING AND REPLACING PA MODULES.
RADIO FREQUENCY HAZARD
DO NOT ATTEMPT TO OPERATE THE PA MODULE WITH THE COVER
REMOVED.