363-206-305 Trouble Clearing:
TAP-101
Issue 3, June 2000 Page 7 of 10
DDM-2000 F
IBER
R
EACH
N
ARROWBAND
S
HELF
7. On DSXBIU, are any indicators lit?
8. Are any indicators on the PCU or RGU lit?
9. Press the LED TEST button on the DSXBIU and verify that all DSXBIU, PCU,
RGU, and CDTU indicators light (quad channel unit BUSY LEDs may also
light). Quickly replace any circuit pack if any of its indicators do not light.
Replace the DSXBIU if the replacement circuit pack indicators do not light (see
second Note in the General section of this TAP).
10. At NBS, is FAIL indicator lit on any circuit pack?
11. Replace circuit pack with FAIL indicator lit. If more than one FAIL indicator is
on, replace the following circuit packs with FAIL lit in the following order:
• PCU or RGU — Use TAP-105 and TAP-103 procedures to replace these
circuit packs.
• DSXBIU (see TAP-102).
• CDTU (see TAP-104).
• Any channel unit with FAIL lit.
12. Did NBS trouble clear?
If YES, do TAP-102 .
If NO, continue with Step 8.
If YES, do TAP-105 or TAP-103.
If NO, continue with Step 9.
If YES, continue with Step 11.
If NO, proceed to Step 12.
If YES, STOP. YOU HAVE COMPLETED THIS
PROCEDURE.
If NO, continue with Step 13.
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