ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
Table 8-8. Tape Reader Testing and Troubleshooting Procedure - Continued
Malfunction indication/
Test procedure
Normal indication
corrective action
A1 Card
A1
Cage Pin
Resistor
E
R1
H
R8
P
R2
R
R5
S
R4
W
R6
R7
R16
M
R3
(Oscilloscope channel A probe
ground return to A1 card pin 5
and probe to pin listed above.)
5.3e. Remove A1 from card ex-
tender and reinstall in card
cage
5.4 SENSE ARM POT ADJUST-
MENT.
5.4a.
5.4b.
5.4c.
5.4d
5.4e.
5.4f.
Remove A6 from card cage
Connect DVM negative test
lead to ground (TB2 termi-
nal 10; TP5) and positive
test lead to A6 card cage pin
R (use card extender)
Hold supply (left front tape DVM indicates +12 to +16V
sensing arm midway be-
tween its extreme positions
Connect DVM negative test
lead to ground (TB2 terminal
10; TP5) and positive test
lead to A6 card cage pin D
(use card extender)
Hold take-up (right front) DVM indicates +12 to +16V
tape sensing arm midway be-
tween its extreme positions
Reinstall A6 in card cage
5.4g. Remove tape from tape
reader
5.4h. Remove power from equip-
ment
5.4i. Disconnect all equipment
5.4j. Reinstall tape reader in case
Voltage out of tolerance: Perform test
3.1; also perform R2 adjustment listed
in the malfunction column of step 3. If
Voltage out of tolerance: Perform R3
adjustment listed in the malfunction
column of step 3.1g
TEST COMPLETED
8-76
