Fault Isolation Tests

TM 11-6130-392-34

section V.

to step h.

Test 7. TB1 and Transformer (T1) Test.

h. Set POWER to OFF; remove memory battery

B1 (TM 11-6130-392-12).

a. Check position of INPUT VOLTAGE switch,

rear of battery charger:

i. Measure voltage across battery B1, using

multimeter.

(1) If INPUT VOLTAGE switch is in 115 VAC

position; go to step b.

(1) If voltage is more than 1 VDC; replace P2

battery connector (Section IV, para 4-36). Go to sec-

(2) If INPUT VOLTAGE switch is in 230 VAC

position; set POWER to OFF. Set INPUT VOLT-

tion V.

AGE switch to 115 VAC position. Go to section V.

(2) If the voltage is equal to or less than 1 VDC;

replace B1. Go to section V.

b. Set multimeter (F =

V, R = 200 V). Con-

nect negative () lead to C1 negative () terminal

j. Set POWER to OFF; check continuity between

(fig. 3-3). Connect positive (+) lead to A11-TP7

S12-C2 and S12-6, and between S12-C3 and S12-9

(fig. 3-2 and 3-4).

(fig. 4-2) using multimeter.

(1) If voltage is more than 30 VDC; go to step c.

(1) If continuity is good; check for faulty wiring

between S12-6 and TB1-E8 (fig. 3-3) and between

(2) If voltage is equal to or less than 30 VDC; go

to step g.

TB1-E7 and S12-C3. If wiring is not faulty; replace

c. Set POWER to OFF. Set multimeter (F = S2, R

TB1-R2 (Section IV, para 4-31). Go to section V.

= 200 K Ω ). Measure resistance between TB1-E1

(2) If continuity is not good; replace S12 (Sec-

tion IV, para 4-30). Go to section V.

(fig. 3-3) and TB1-E2 with multimeter.

Test 5. SET CHARGE TIME Switch (S3) Test

(1) If resistance is less than 17,500 ohms; go to

a. Set multimeter (F =

V, R = 200 V). Con-

step d.

nect negative lead () to C1 negative () (fig. 3-3).

(2) If resistance measured is equal to or more

With positive lead; measure voltages at test points

than 17,500 ohms; replace TB1-R1 (Section IV, para

4-31). Go to section V.

(fig. 4-2): S3A pin 2, S3B pin 8 and S3C, pin 8.

d. Set multimeter (F = Ω , R = 20 K Ω ). Measure

(1) If the voltage is more than 9 VDC at each

resistance between TB1-E5 and TB1-E6 (fig. 3-3).

pin; go to step b.

(1) If resistance is less than 9,500 ohms; go to

(2) If the voltage is equal to or less than 9 VDC

step e.

at any one pin; set POWER to OFF, replace S3 (Sec-

tion IV, para 4-25).

(2) If resistance measured is equal to or more

b. With positive lead of multimeter, measure

than 9,500 ohms; replace TB1-R1l (Section IV, para

voltage at S3B pins 1, 2 and 4 and S3C pins 1, 2 and

4-31). Go to section V.

e. Set multimeter (F = Ω , R = 20 K Ω ). Measure

r e s i s t a n c e between TB1-E15 and TB1-E16 (fig.

(1) If the voltage is less than 1 VDC at each pin;

set POWER to OFF, check for faulty wiring be-

3-3).

tween S3A-2 and A12-28 connector (fig. 3-2 and

(1) If resistance is less than 5,000 ohms; go to

step f.

3 - 6 ) , S3B-1 and A12-26 connector, S3B-2 and

A12-22 connector, S3B-4 and A12-13 connector,

(2) If resistance measured is equal to or more

S3B-8 and A12-27 connector, S3C-1 and A12-2 con-

than 5,000 ohms; replace TB1-R12 (Section IV, para

n e c t o r , S3C-2 and A12-4 connector, S3C-4 and

4-31). Go to section V.

f. Perform panel meter (M1) adjustment (Section

A12-3 connector, and S3C-8 and A12-1 connector.

Repair faulty wiring. (If plug-in board connector

IV, para 4-36).

must be replaced; send to depot). Go to section V.

(1) If meter can be adjusted, go to section V.

(2) If the voltage is 1 VDC or more at any pin;

(2) If meter cannot be adjusted; replace panel

set POWER to OFF, replace S3 (Section IV, para

meter Ml (Section IV, para 4-24). Go to section V.

g. Set multimeter (F = ~ V, R = 200 V). Set

4-25).

Test 6. Transformer (T1) Output Test.

POWER to OFF.

h. Peel or pick away red staking compound on

a. Set POWER to OFF. Check continuity be-

transformer T1 (fig. 4-1).

tween T1-8 (fig. 4-1) and A11-22 (fig. 3-2 and 3-4)

i. Set POWER to ON. Measure AC voltage across

and between T1-9 and A11-23 with multimeter.

T1-1 and T1-2.

(1) If continuity is good; replace faulty T1

transformer (Section IV, para 4-18). Go to section V.

(1) If voltage is more than 100 VAC; go to step

(2) If continuity is not good; check for the faul-

ty wiring between A11-22 connector and T1-8, and

(2) If voltage is equal to or less than 100 VAC;

between A11-23 and T1-9, or for a faulty connector.

set POWER to OFF; replace S1 (Section IV, para

Repair open lead or replace wire (if plug-in board

4-21). Apply a 0.04-0.08 inch coat of red staking

connector must be replaced; send to depot). Go to

compound (SM-A-852314) on T1-1 through T1-5

4-13