Chapter 6. General Support Maintenance Instructions

TM 11-6625-524-14-2

CHAPTER 6

GENERAL

SUPPORT

MAINTENANCE

INSTRUCTIONS

Section I. TROUBLESHOOTING

(b) Check all switches and controls for

6-1. Troubleshooting Techniques.

ease of operation.

a. General. The first procedure in servicing a

defective voltmeter is to sectionalize the fault.

(2) Operational tests. Operational tests

Sectionalization consists of tracing the fault to a

frequency indicate the general location of trouble.

printed circuit b o a r d or chassis. Once the

In many instances, the test will determine the

d e f e c t i v e board is located, isolation to the

exact n a t u r e o f t h e f a u l t . The operating

defective part is accomplished. Troubleshooting

procedures (para 3-4), preventive maintenance

ia performed by the general support repairman.

checks (para 4-4 to 4-6), and the alignment

b. Sectionalization. Listed in (1) through (4)

procedure (para 6-6) provide a good operational

below is a group of tests arranged to help locate

test.

the defect.

(3) Voltage and resistance measurements.

(1) Visual inspection. When the voltmeter is

Voltage and resistance measurement are

brought in for repair, remove the top cover and

shown in figure 6-1. Several waveforms at critical

inspect as follows:

points are shown in figure 5-10. Use these to

(a) Check to see that all confections and pc

localize trouble to a component.

boards are properly seated. Repair or replace any

connections or leads that are broken or otherwise

defective.

6-1