TM9-4935-481-14-1
The align 1 and align 2 screwdriver adjustments are used to align the DMS-D sum and difference generator, and associated
use schematic diagrams and standard troubleshooting techniques to isolate a malfunction. For example, the fault isolation
peak detector, as required, during the test set pre-operational check.
procedure may say check Q1, Q2, and Q3. This means that the fault may lie with transistors Q1, Q2, or Q3 and any other
components (resistors, capacitors, etc.) within the transistor circuits.
(e) The internal test, peak detector and counter inhibit (sec) sections are used in conjunction with other
sections of the test set.
b. The DMS-G test kit will be operated and maintained by USMC maintenance personnel, MOS 2871, and will perform
the following G/S repair cycle functions: (1) Operational check out test.
1. The internal test section is used to monitor and align circuits inside the DMS-D.
(2) Fault isolation to the circuit level.
2. The peak detector section is used in conjunction with the trainer and tracker sections.
(3) Adjustment and calibration of equipment, as necessary.
3. The counter inhibit(sec) section is used to inhibit the CT. When the run/hold/off switch is in the run position, the CT
will be inhibited at the time selected on the counter inhibit(sec) dials. In the off position the CT will run continuously, and in the
(4) Operational retest after repair or adjustment to verify that performance is within specified field tolerance limits
hold position the CT will not run.
required for return to service.
(2) The test adapter cable assembly (1W4) is used to test the TTS trigger evaluation circuitry, for performing
c. The DMS-G test kit is supported at the G/S maintenance level by the following test hardware.
continuity tests of the LET, and for interfacing the tracker firing mechanism to the TTS.
(3) The optical element assembly is used to support the radiometer optical head.
(1) The DMS-D supplies power to the DMS-G, and certain stimuli and monitor functions for the UUT. The DMS-G
test kit provides access to test points on the UUT. Where the stimuli are not available from the DMS-D, they are generated
(4) The E cell synchronizer test adapter is used to synchronize the "E" cell in the TTS.
within the DMS-G.
(5) There are 14 circuit card extenders which permit manual probing of the DMS-D, MTS and TTS Circuit
(2) The tracker test set (TSM-114) (TTS) and standard test equipment provided with the Guided Missile
cards while they are installed.
Maintenance Shop AN/GSM-216, supplement the DMS-G during UUT checkout. Together, this equipment will provide the
stimuli, monitor functions, and inspection necessary to fault isolate malfunctioning plug-in units and subassemblies to the
(6) The radiometer and associated components are used to detect the output of the OAC. This IR energy is
circuit level. Fault isolation will be accomplished by a combination of programmed or automated testing, manual probing, and
then converted to electrical energy and applied to the DMS-D test set and oscilloscope for measurement of amplitude and
visual inspection. TM 9-4935-482-40 contains the DMS-G test procedures.
(7) Test adapters 10275938, 10275939, and 10275940 mate with DMS-D connectors J5, J6, and J8 to provide
d. The function of each major unit of the DMS-G is as follows:
accessibility to selected pins for monitoring during OMS-O maintenance calibration procedures.
(1) The DMS-G test kit (fig. 1-2) may be divided into two major sections for functional description. These sections
(8) Dummy load (10276121) places a 1,000 ohm load in parallel with the DMM input when connected to selector A jack J12 for
are the circuit card/subassemblies section and the control-signal comparator section.
making specific measurements.
(a) The circuit card/subassemblies section contains circuits, switches, and controls of a general nature
1-8. Functional Description of DMS-G.
pertaining to the fault isolation of malfunctioning circuit cards and subassemblies of DRAGON weapon system hardware and
DMS equipment. Power is applied to the DMS-G test kit by connecting it to the DMS-D (see fig. 1-3) and setting the DMS-G
a. The DMS-G test kit is assigned to the G/S maintenance level. It is used to isolate a malfunction to a defective circuit
power switch to the ON position. (The DMS-D test set must have power applied.)
consisting of components, assemblies, or modules. When such items are listed as possible suspects, the technician must
1. The DMS-G power indicator lamp will illuminate when power is applied.
1-10