Organizational Troubleshooting

TM 11-6720-248-12

(para 4-7) and the organizational troubleshooting chart

does not restore normal equipment performance,

(para 5-7).

troubleshooting is required by higher category

maintenance personnel. Note on the repair tag the

corrective measures taken.

5-7. Organizational Troubleshooting

a. General. Before using the troubleshooting chart,

The troubleshooting chart (b below) is provided as an aid

examine the repair tag to see whether the trouble has

in localizing trouble in the camera set. It supplements

been sectionalized.

If there has been no

the operator troubleshooting chart (para 4-7). Only those

sectionalization, perform the procedures outlined in the

corrective

measures

which

the

organizational

operator troubleshooting chart (para 4-7).

maintenance personnel can apply are given. If the

suggested measure

b. Organizational Troubleshooting Chart.

Item No.

Trouble symptom

Probable trouble

Checks and corrective measures

a. Defective batteries.

a. Replace strobe assembly batteries

Neon indicator (fig. 3-4) fails

to glow within 15 seconds

(para 5-9).

b. Defective neon indicator.

b. Refer equipment to higher cate-

after strobe assemblies are

flashed (battery operation).

gory of maintenance for repair.

a. Broken or loose wiring in flash or

a. Remove junction box cover and

One or both strobe assemblies

do not flash when shutter

shutter cord.

check continuity of electrical

is tripped.

circuits. Use low ohms scale of

Multimeter AN/URM-105, and

repair break in circuit.

b. Defective flash synchronization

b. Disconnect shutter cord from lens

switch in lens and shutter as-

and shutter assembly. Short cen-

sembly.

ter conductor to outer shield of

shutter cord. If strobe assem-

blies flash, shutter synchroniza-

tion switch is defective; refer

equipment to higher category

maintenance for repair.

c. Defective strobe assembly.

c. Refer equipment to higher cate-

gory maintenance for repair.

d. Defective battery in triggering cir-

d. Replace battery in triggering cir-

cuit.

cuit (para 5-8).

a. Compress the two battery compartment clips

5-8. Replacement of Triggering Circuit Battery

and withdraw the old battery tray.

(fig. 5-1)

b. Install a new battery tray and press in until the

Replace the triggering circuit battery as follows:

plastic clips engage with the strobe assembly housing.

a. Loosen the two screws that secure the junction

box cover.

b. Remove the junction box cover.

5-10.

Replacement of Spreader Rollers and

c. Note the polarity position of the battery and

Bushings

remove the battery from the clips.

(fig. 5-3)

d. Install the replacement battery in the position

Replace the spreader rollers and bushings in the camera

noted in c above.

back cover assembly (when required) as follows:

e. Install the junction box cover and secure it by

a. Open the back cover assembly (para 3-3d).

b. Gently spring the roller assembly release latch

tightening the screws loosened in a above.

outward until the roller assembly is released.

c. Swing the roller assembly away from the back

5-9. Replacement of Battery Tray

cover assembly.

(fig. 5-2)

Install a new battery tray in the strobe assembly (when

required) as follows:

5-3