TM 11-5895-1141-12
CHAPTER 3
MAINTENANCE INSTRUCTIONS
3-1.
ORGANIZATIONAL MAINTENANCE
Organizational maintenance consists of an operational check (para 2-5) to determine if any of the assemblies are
defective. If they are found to be defective or inoperative refer the trouble to a higher level of maintenance.
3-2.
PLACEMENT OF KNOBS, FUSES, AND LAMPS
a. Indication Lamps. All indication lamps are 28 V, 0.04 A, T-1 bulb, with an aircraft style base. The three
indicator lamps located on the front panel of the selector unit assembly may be accessed for replacement by removing
the lens covering the lampholder unit. Refer to the figure on page 2-3. There is a single lamp on the recorder-monitor
module located in the audio unit assembly. Refer to the figure on page 2-2. This lamp is accessed by removing the lens
covering the lampholder unit. The power indicator lamp located on the audio unit assembly is accessed for replacement
by removing the lens covering the lampholder assembly.
b. Knobs. There are three knobs located on the front panel of the audio unit assembly. Refer to the figure on page
2-2. These knobs may be tightened or replaced by loosening the two Allen-type set screws on each knob which hold the
knob to the central shaft.
c. Fuse. There is a single five ampere fuse located on the front panel of the audio unit assembly. Removing the
fuse cap on the fuseholder accesses the fuse for removal.
3-0
