Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 3-4. Troubleshooting with Bit Malfunction Words – Continued
Digit Value Malfunction
Probable cause/troubleshooting
Reference
e. If a malfunction indicator lights again, record which one lights and record the
nonzero contents of monitor ID 1 or 2.
f. If the malfunction does not clear, turn system off and realign.
g. If the malfunction does not repeat, continue with the test.
h. If the malfunction still exists, perform the following steps as applicable.
The malfunction word structure is ID MAL ABCDEF where:
ID represents the ID number of the particular malfunction word. ABCDEF
represents the 6 digits in the malfunction word. The numerical value of a digit
designates a particular malfunction. The table identifies the malfunction and
gives the probable cause and additional troubleshooting instructions.
Example: 02 MAL 000006 means digit F of ID 2 malfunction word has a value
of 6. This indicates two malfunctions: Time-out counter inoperative; and
time-out counter interrupt invalid.
ID 1 MAL
A
Not used
B
1JJ,4$,6 Checksum error
or 7
c
lor3 Discrete party fail
2or3
0p code test fail
4,5,6, or 7 Memory test fail
Replace memory Al and IMU, computer Para 3-13b
and computer power supply Para 3-15c
Para 3-15b
Para 3-13c
Replace computer discrete 1/0 A9
Para 3-15a
Replace computer control no. 1 card A3
Para 3-15a
a) Reseat computer memory Al, and tighten para 3-15b
memory wedge locks
b) Replace computer, keeping old memory A 1
Para 3-15b
and IMU
c) Replace memory A 1 and IMU
Para 3-13c
D1
Platform 1/0 short loop fail
Replace computer platform 1/0 card A8
Para 3-15a
2
Computer serial data bus
Replace computer 1/0 controller card A7
Para 3-15a
fail
4
E4
A/D ShOXt 100P fail
CDU serial data bus
Replace computer A/D card Al 1
Refer to ID 5 MAL
Para 3-15a
F
Not used
Change 6
3-17