TM
11-6625-3041-30/TO
33A1-8-908-12
2-6. SG-1139 CHECK PROCEDURE (CONT)
q Set
controls as
Step Reset and
follows :
13
Error Count
POWER . . . . ON
TIMING . .. MASTER
Keep cables
connected. Set
DATA RATE to 576
ATACS through 4608
(all settings).
At each setting, press RESET DISPLAY then press SINGLE ERROR:
Errors display
must read zero
when RESET is
pressed and must
increase count by
one each time
SINGLE ERROR
is pressed.
If this step
passes, proceed to step 14. Keep cables connected.
This step checks the following:
Control Filter . . . . ERRORS display (set 0s function)
Transmit 2 card . . . Error Counter (set 0s function)
Receive 2 card . . . . BER Control (Error Counter set 0s)
If ERRORS display digits do not all change to zero:
Remove LOGIC access cover (refer to TM 11-6625-3041-12) and
note which card contains a lit fault indicator. Replace that
card and repeat step 13.
If no card contains a lit fault indicator, possible cause is
(in order of probability): Receive 2 card A6 or Transmit 2
card A4. Replace, one at a time (refer to TM 11-6625-3041-12),
and repeat step 13.
If replacement card does not provide proper indication,
possible cause is Control Filter A8. Replace (refer to