Fault Isolation Tests

TM 11-6130-392-34

(1) If meter reading is 20 ohms or less; go to

step k.

step s.

(2) If meter reading is less than 7.0 volts; dis-

(2) If meter reading is greater than 20 ohms;

continue testing, send battery charger to next high-

replace F6 (fig. 2-2). Go to section V.

er maintenance level.

s. Remove A6 (fig. 3-2) and check multimeter.

k. Remove positive lead of multimeter from A12

(1) If meter reading is 20 ohms or less, go to

pin 41 and connect it to A12 pin 34.

step t.

(1) If meter reading is 7.0 volts or more; go to

(2) If meter reading is greater than 20 ohms,

step l.

replace A6 (Section IV, para 3-14) and F6 (fig. 2-2).

(2) If meter reading is less than 7.0 volts; dis-

Go to section V.

continue testing, send battery charger to next high-

t. Insert A6 into its original location. Remove A7

er maintenance level.

l. Press START TIME switch. Check multimeter

(fig. 3-2); check multimeter.

(1) If meter reading is 20 ohms or less, go to

while switch is pressed.

step u.

(1) If meter reading is 0 . 1 volt or less; set

(2) If meter reading is greater than 20 ohms,

POWER switch to OFF, and replace A12 (Section

replace A7 (Section IV, para 3-14) and F6 (fig. 2-2).

IV, para 3-16). Go to Section V.

Go to section V.

(2) If meter reading is more than 0 . 1 volt; dis-

u. Insert A7 into its original location. Remove A8

continue testing, send battery charger to next high-

(fig. 3-2); check multimeter.

er maintenance level.

m. Refer to paragraph 3-9b. and put A11 (fig.

(1) If meter reading is 20 ohms or less, go to

step v.

3-2) on the extender board.

(2) If meter reading is greater than 20 ohms,

n. Set multimeter to 10 VDC scale. Connect nega-

replace A8 (Section IV, para 3-14) and F6 (fig. 2-2).

tive multimeter lead to negative () lead of C1 (fig.

Go to section V.

3-3). Connect positive lead (+) to A11 by using pin

v. Insert A8 into its original location. Remove A9

20 on extender board.

(fig. 3-2); check multimeter.

(1) If meter reading is between 9.0 and 10.0

volts; go to step o.

(1) If meter reading is 20 ohms or less, go to

step w .

(2) If meter reading is not between 9.0 and 10.0

(2) If meter reading is greater than 20 ohms,

volts; set POWER switch OFF, and replace A11

replace A9 (Section IV, para 3-14) and F6 (fig. 2-2).

(Section IV, para 3-15) and F6. Go to section V.

Go to section V.

o. Set POWER switch OFF. Remove positive lead

w. Insert A9 into its original location. Remove

of multimeter from A11 pin 20 and set multimeter to

A10 (fig. 3-2); check multimeter.

the Rx1 scale. Connect positive lead to A11 pin 14 on

(1) If meter reading is 20 ohms or less, go to

extender board.

step x.

(1) If meter reading is 20 ohms or less; go to

(2) If meter reading is greater than 20 ohms,

step p.

replace A10 (Section IV, para 3-14) and F6 (fig. 2-2).

(2) If meter reading is greater than 20 ohms; go

Go to section V.

to step r.

x. Insert A10 into its original location. Remove

p. Remove A12 and check multimeter.

b o t h multimeter leads from battery charger and

(1) If meter reading is 20 ohms or less, go to

remove A11. Connect multimeter leads to pins 12

step q.

and 18 of the A11 board.

(2) If meter reading is greater than 20 ohms;

replace A12 (Section IV, para 3-16) and F6 (fig. 2-2).

(1) If meter reading is 20 ohms or less; replace

A11 (Section IV, para 3-14) and F6 (fig. 2-2). Go to

Go to section V.

q. Insert A12 into its original position. Remove

section V.

(2) If meter reading is greater than 20 ohms;

both leads of multimeter from battery charger and

d i s c o n t i n u e testing, send battery charger to the

remove A11. Connect leads of multimeter to pins 13

next higher maintenance level.

and 14 of A11 and check multimeter.

Test 7. Charging Circuit Printed Wiring Assem-

(1) If meter reading is 20 ohms or less, replace

blies (A6-10) Test.

A11 (Section IV, para 3-15) and F6 (fig. 2-2). Go to

a. For channels that could not be adjusted for a

section V.

meter reading of 50 mA; determine if there was a

(2) If meter reading is greater than 20 ohms;

discontinue testing, send battery charger to next

(or some lesser) reading.

(1) If no reading at all, on questionable chan-

higher maintenance level.

nel(s), go to step f.

r. Remove positive lead from A11 pin 14 and con-

(2) If there was a meter reading, on question-

nect it to A11 pin 18.

3-13