TM 11-6625-3041-12/TO 33A1-8-908-1
3-11. TROUBLESHOOTING PROCEDURE (cont)
Step
If TMG IN or DATA IN indicator does not light or if FAULT
indicator lights:
8
cont
Swap unbalanced timing and data cables. If the lit indicator
changes (TMG IN is lit instead of DATA IN or DATA IN is lit
instead of TMG IN), cause is cable. Replace and repeat step 8.
If swapping cables does not change indicator that is lit, remove
LOGIC access cover (refer to para 3-16) and note which card
contains a lit fault indicator. Replace that card and repeat
step 8.
If replacement card does not provide proper indication, possible
cause is Control Filter A8. Replace and repeat step 8.
If no logic card contains a lit fault indicator, remove POWER
SUPPLY access cover (refer to para 3-17) and note which card
contains a lit fault indicator. Replace that card and repeat
step 8.
If no card contains a lit fault indicator, possible cause is
(in order of probability): Receive 1 card A5, Transmit 1
card A3, Transmit 2 card A4, or Multi VDC card A1. Replace,
one at a time (refer to para 3-16 and 3-17), and repeat step 8.
If replacement card does not provide proper indication, refer
SG-1139 to Direct Support Maintenance.
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