Figure 2-9. Logic card A10/A15 test functional diagram (sheet 9 of 9)

TM 9-4931-363-14&P

Figure 2-9. Logic card A10/A15 test functional diagram (sheet 9 of 9)

for comparator card A11 in TM 9-1270-212-14&P and

2-16. Comparator Card A11 Test Theory.

mentally perform steps a through c.

a. Reference Material. The following reference

materials are required to support the comparator card Al1

test theory discussion:

(2) Refer to figure 2-10 and step d of the A11

troubleshooting procedure, The A11 comparator card

( 1 ) Comparator card Al1 troubleshooting

under test is connected to J9 on the test set. The 28 volts

procedures from TM 9-1270-212-14&P

dc is connected through wiper 1 and contact 7 of S4-A,

through wiper 1 and contact 5 of S8-A, and through CR23

(2) Comparator- card Al1 foldout schematic diagram

to energize K4. The energized K4 connects three voltages to

from TM 9-1270-212-14&P

the card that represents a particular linkage position.

Reference voltage V8 (paragraph 4-8c and table 4-5) from

(3) Comparator card A11 test functional diagram

the wiper of R8 is connected through contacts 4 and 3 of

K4 to J9-38. Reference voltage V5 from the wiper of R7 is

connected through contacts 7 and 6 of K4 to J9-40.

b. Theory Discussion

Reference voltage V9 from the wiper of R10 is connected

through contacts 10 and 9 of K4 to R9-39. Two voltages

(1) To prepare for the comparator card Al1 test

that represent normal outputs from the test resolver when a

theory discussion, refer to the troubleshooting procedures

buffer amplifier is under test are connected to the card.