CHAPTER 4 FINAL INSPECTION - TM-9-1240-369-340089

TM 9-1240-369-34

CHAPTER 4

FINAL INSPECTION

(3) Press and hold the TSW switch and observe the

4-1. Scope.

following:

Final inspection is performed after repair has

(a) All lamps on the commander's control unit

been completed to insure serviceability of the laser range

and R/T unit light.

finder according to established standards. Any items

(b) RANGE (METERS) and RETURNS

containing defects disclosed by the final inspection will

indicators display 8888 and 8, respectively.

be returned to the maintenance shop for repair and

(4) While pressing the TSW switch, press and

adjustment.

release DMR switch twice and observe the following:

(a) All lamps on the commander's control unit

4-2. Checkout.

alternately dim and brighten.

Using the test cables from the special tools and

(b) RANG(E (METERS) and RETURNS

test equipment, make proper interconnection of the

indicators maintain the same brightness.

individual units of the laser range finder as instructed in

(5) Release the TSW switch. The status of the

paragraph 2-4. Then, follow the procedures in a below

switch lamps will be that of step 2.

for checkout to verify proper operation of the units within

(6) Adjust RTCL ILLUM control on the R/T control

the laser range finder system.

unit and observe that the reticle illumination in the

a. Built-in Test. The laser range finder contains a

receiver-transmitter unit varies.

built-in test (BIT) capability which traces faults to the

(7) Press and release the RANGE switch on R/T

lowest line replaceable unit.

The test consists of

control unit and observe the following:

manipulating the laser range finder controls in a

(a) RANGE RETURN SELECTOR LAST lamp

prescribed sequence while observing that certain lamps

remains lit.

light and certain ranges appear on the readout. Although

(b) RANGE (METERS) indicator displays 84.5

the laser will not be fired while the LASER MODE

+15.

CONTROL switch on the commander's control unit is in

the TEST position, the ballistic dust cover should be

(8) Press

and

release

RANGE

RETURN

closed. This will prevent the exposed optics from

SELECTOR 1 switch and observe the following:

contamination and any eye injury in case the LASER

(a) RANGE RETURN SELECTOR 1 lamp

MODE CONTROL switch is inadvertently turned to the

lights.

ON position.

(b) RANGE RETURN SELECTOR LAST lamp

goes out.

NOTE

Unless otherwise specified, all

+15.

switches, lamps., and readouts

(9) Press

and

release

RANGE

RETURN

mentioned in the following procedure

SELECTOR 2 switch and observe the following:

are on the commander's control unit

(a) RANGE RETURN SELECTOR 1 lamp

(A79).

goes out.

(b) RANGE RETURN SELECTOR 2 lamp

(1) Apply external power to the hot mock-up as

lights.

described in paragraph 2-4. Adjust voltage to 24 +1 V.

(2) Set LASER MODE CONTROL switch to TEST

9995, 9990, or 000.

position and observe the following:

(10) Press

and

release

RANGE

RETURN

(a) LASER MODE CONTROL TEST lamp

SELECTOR LAST switch and observe the following:

lights.

(a) RANGE RETURN SELECTOR 2 lamp

(b) RANGE RETURN SELECTOR LAST lamp

goes out.

lights.

(b) RANGE RETURN SELECTOR LAST lamp

lights.

indicators display 0000 and 0, respectively.

(d) RESET lamp on the R/T control unit lights.

15.

(e) RANGE lamp on the R/T control unit lights

but does not flash on and off.

4-1