Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-6.1. Computer Diagnostic/Alignment Program Using Tape Reader, Part No. 877406-2 — Continued
Malfunction
Test procedure
Normal indication
indication/corrective action
1g.
1h.
li.
lj.
lk.
Ensure that tape reader SPL/
LOOP switch is set to LOOP
Press SPU ON switch-indicator
to on. Press to extinguish all
SPU lighted switch-indicators
except SPU ON and PADS OFF
Turn TTY printer MOTOR
switch to ON
Press and hold LAMP TEST
switch. Release after verifying
lamps light properly
Turn on + 28V power source
1l. Set PS BATTERY and VEHI-
CLE circuit breakers CB1 and
CB2 to ON
2. CPU TEST/MEMORY CLEAR
NOTE
If any card assembly is replaced dur-
ing this test, repeat the test from
step 1i.
4-54.4
Change 1
SPU ON and PADS OFF switch-
indicators light. COMP FAIL in-
dicator may light. All lamps
pressed extinguish
All SPU lamps light except LAMP
TEST and ENTER
and
FAILURE/ACTION indicator re-
mains blank for at least 1.5 sec-
onds
FAILURE/ACTION indicator se-
quentially displays the following
within 15 seconds after pressing
and
releasing LAMP TEST
switch:
Indication
Blank
30
20
Blank
88
Blank
32
Blank
77
If no lamp light, press and release
SELF TEST switch and press
LAMP TEST switch again
If lamps are partially lighted, re-
place in
accordance with TM
5-6675-238-14 and/or TM
08839A-14/1
NOTE
For abnormal indication,
verify
equipment is connected as shown in
figure 4-3.
Check connectors for
bent or broken pins. Troubleshoot
PADS test set in accordance with
TM 5-6675-238-14 and/or TM
08839A-14/1.