Chapter 5. DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

TM 11-5825-270-23

CHAPTER 5

DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

Section I. GENERAL

5-2. Voltage, Resistance and Waveform

5-1. Introduction

Measurements

Direct support maintenance consists of replacement of

Voltage, resistance and waveform measurements shall

the switch bracket assembly and certain chassis

be performed in accordance with paragraphs 4-2, 4-3,

mounted components. Procedures are included in this

and 4-4.

chapter for replacement. Each replacement procedure

references the test procedure of chapter 4 that must be

5-3. Tools and Equipment

performed to make sure that repair has been

successfully accomplished.

There are no special tools or equipment required to

accomplish direct support maintenance tasks.

Section II. TROUBLESHOOTING

5-4. Troubleshooting Information

section III. When a fault is isolated which requires direct

support maintenance personnel to perform the

replacement procedure, the procedures in section III of

Troubleshooting

procedures

for

direct

support

this chapter are required.

maintenance are included within the organizational

maintenance troubleshooting procedure of chapter 4,

Section III. MAINTENANCE OF MONITOR RECEIVER

b. Replacement.

5-5. Maintenance Information

(1) Replace the switch bracket by reversing the

procedure in a above.

Maintenance procedures for direct support maintenance

(2) Perform the test procedure of paragraph

consist of changing certain chassis mounted parts of the

4-22.

monitor receiver. The replacement procedures refer to

the test procedures of chapter 4 which are required to

5-7. Removal and Replacement of Chassis Mounted

check that repair has been successfully completed.

Parts

There are no direct support maintenance tasks for the

antenna.

(fig. 4-2)

5-6. Removal and Replacement of Switch Bracket

a. Removal

(fig. 4-2)

(1) Remove the wires to the part and tag the

wires.

a. Removal.

(2) Remove the nuts or screws holding the part

(1) Remove RF amplifier PCB A3. Refer to

to the chassis.

b. Replacement

paragraph 4-16.

(2) Tag and unsolder the connections to XA3

(1) Replace the part by reversing the procedure

in a above.

(12).

(2) Perform the maintenance turn on procedure

(3) Tag and unsolder the connections (13) to

the switch bracket (14).

of table 4-2.

(4) Remove two nuts (7), lockwashers (6) and

flat washers (5) holding the switch bracket (14) to the

front panel (7).

5-1