REPAIRS AND ALIGNMENT
Section I. GENERAL
3-1. General Parts Replacement Techniques
Most of the parts in the SM-442A/GRC can be removed
TM 11-6625-535-15 and
and replaced using conventional techniques. Those
parts requiring special techniques or procedures are
precautions must be observed when working on the SM-
Electronic Counter, Digi-
tal Readout AN/USM-
a. Use a pencil-type soldering iron with a 25watt
Charger, Battery PP-
transistorized. If the soldering iron must be used with
iron and the ac line. Do not use a soldering gun;
Tee Connector UG-
soldering guns use high wattage' which can prove
harmful to components.
Test Cables W15, W1,
b. When soldering transistor leads, solder quickly.
W2, W3, W22 and
Use a heat sink (such as a pair of long-nosed pliers)
whenever possible. Use approximately the same length
Power Supply PP-3940G-TM 11-6130-247-15
and dress of transistor leads as used originally.
3-2. Special Tools and Test Equipment
3-4. Characteristics of Test Equipment Required for
equipment required to align the SM442A/GRC
The type of test equipment required to align the
simulator is described in the chart in paragraph 35.
3-3. Special Test Equipment Chart
3-5. Test Equipment Characteristics
Voltage range: 0 to
Analyzer, Spectrum TS-
TM 11-5097 or
1,000 ac and to 5,000 dc.
Current range: 0 to 10
Sensitivity: 1,000 ohms/
volt ac 20,000 ohms/