TM 11-5820-921-40-1
MAINTENANCE TURN-ON PROCEDURE
Refer to chapter 30 of System Manual TM 11-5820-924-12
3-99.
for applicable turn-on procedure.
3-100. TROUBLESHOOTING DATA
3-101. The data contained in figure 3-4 and table 3-11 can be used both as a check of normal operation and
in the location of trouble in the equipment.
3-102. Figure 3-4 (Details A, B, and C) lists all test points and indicators in the power amplifier.
3-103. Table 3-11 lists normal test point voltage indications for the various operating conditions of the
equipment.
3-105. Figures 3-5 through 3-23 comprise the fault logic diagrams that apply to various power amplifier
faults. These diagrams indicate logical approaches to trouble resolution, and, along with tables 3-8 through
3-11 and figures 3-4 through 3-23, should be referred to during fault logic analysis as aids to understanding
the exact nature of the faults and their possible solutions.
SECTION V
FIELD MAINTENANCE - DIRECT SUPPORT INTERMEDIATE MAINTENANCE
AND GENERAL SUPPORT INTERMEDIATE MAINTENANCE
NOTE
Maintenance Kit OA-9163/GRC-193A is available as a Maintenance Test Bed.
3-106. INTRODUCTION
3-107. This section describes field maintenance procedures applicable to the power amplifier. Included
herein are adjustment, repair, disassembly, and check/test procedures.
3-108. Maintenance performed in direct support of, or, in some specifically authorized cases, by the using
unit, is limited primarily by the tools, test equipment, and repair parts authorized.
3-109. Maintenance requiring more elaborate facilities, tools, and test equipment, is normally performed in
a centralized location and is limited only by the tools, test equipment, and repair parts authorized.
3-111. The only adjustments and alignments applicable to field maintenance activities are the HV OVER-
LOAD THRESHOLD adjustment (1A2R20), the OVER VOLTAGE (+26.5 VDC) adjustment (1A3R3), the
Ip ALC adjustment (1A7A2R1), the RF ALC adjustment (1A7A2R2), and 400 Hz ZERO BEAT adjust-
ment (1A12A1R14). The mechanical and/or electrical alignment of Tank Circuit Module Assembly 1A8
and the electrical alignment of Tune Detector PWB Assembly 1A10A1 inductors (L1, L2, and L3) are
applicable to maintenance activities having the facilities described in Rebuild Standard for Power Amplifier
AM-6545/GRC-193, RS-87107B-50/3.
