The organizational maintenance instructions for the TD-1288 ( )/GRC and TD-1289 ( ) (V)/GRC
multiplexer contained in this chapter cover the corrective actions authorized to be performed by
the organizational level technician. The organizational maintenance concept is to isolate a fault to
a module and replace the module with a known operational one. The organizational level
technician is also responsible for the installation of the multiplexer in a fixed and/or mobile site.
Do not go beyond the instructions given in this chapter.
REPAIR PARTS, TOOLS, AND TEST EQUIPMENT
Repair parts are listed and illustrated in the repair parts and special tools list, TM 11-5820-880-20P.
Tools and test equipment required for organizational maintenance are listed in appendix B of this