TM 11-6625-3025-14/ET426-AA-MMA-010/E154 VII210/T.O. 33A1-8-902-1-1
CHAPTER 6
GENERAL SUPPORT MAINTENANCE INSTRUCTIONS
Section I. GENERAL
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Introduction. Maintenance of the test pattern generator is performed at three levels: Organizational, General
Support and Depot. This chapter provides instructions for general support maintenance only. General support
maintenance is performed by those maintenance activities designed to support the using organization and emphasizes
corrective maintenance at the equipment site. General support maintenance personnel perform corrective maintenance
on items which are identified as faulty by organizational maintenance personnel, but are beyond their capability to correct
using the maintenance resources authorized at the organizational maintenance level. General support maintenance
personnel also provide technical assistance to the using organization in all areas which require skills and training that are
beyond the capabilities of the organizational maintenance personnel. General support maintenance is limited to the
activities described below:
a. Replace an unserviceable subassembly, module, assembly or unit with a like subassembly, module,
assembly or unit.
b. Perform the repairs and adjustments required to correct a specific failure or unserviceable condition and
restore an item to a serviceable condition. This function includes soldering or component replacement.
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general support maintenance personnel for troubleshooting faults which cannot be resolved or repaired by organizational
level personnel. Normally, such faults are traceable to wiring or chassis-mounted components.
Section II. TOOLS AND EQUIPMENT
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Tools and Test Equipment. Tools and test equipment required to perform the maintenance procedures given in
this chapter are listed in the Maintenance Allocation Chart in Appendix B.
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Repair Parts. Repair parts authorized for use by general support maintenance personnel for the test pattern
generator are listed in the Repair Parts and Special Tools List (RPSTL), TM 11-6625-3025-24P.
Section III. TROUBLESHOOTING
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General. This section provides the fault isolation and detailed troubleshooting procedures required to identify and
correct a malfunction in the test pattern generator. Fault isolation at this level consists primarily of signal tracing, voltage
and waveform measurements (refer to Section V). Schematic diagrams for the printed
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