Maintenance Object Repair Procedures
555-233-123
10-1566 Issue 4 May 2002
1
(cont’d.)
FAIL 3. Look for DS1-BD (DS1 Interface Circuit Pack) errors
using the display error command. Refer to the DS1-BD
Maintenance documentation for recommended strategy
to resolve any DS1-BD errors found. If there are no
DS1-BD errors, proceed to Step 5.
4. After all DS1-BD errors have been resolved, determine if
the alarm still exists by issuing the test synchronization
r 4 command to clear the alarm. If any test repetitions fail,
follow the procedure for those failures.
5. Check the DS1 reference A connections to the Stratum 3
clock.
6. Determine if the alarm still exists by issuing the test
synchronization r 4 command to clear the alarm. If any
test repetitions fail, follow the procedure for those failures.
If the problem persists after you have performed this
procedure three times, follow normal escalation
procedures.
2 FAIL One power supply failed. This error only occurs when the
Stratum 3 clock has two power supplies, and one of them has
failed. However, the clock can function with one power supply.
1. Locate the failed power supply by looking for a power
supply with a red LED and replace it.
2. Determine if the alarm still exists by issuing the test
synchronization r 4 command to clear the alarm. If any
test repetitions fail, then follow the procedures for those
test failures. If the problem persists after you have
performed this procedure three times, then follow normal
escalation procedures.
4 FAIL One clock unit failed.
1. Look at the Stratum 3 cabinet for a red LED on a circuit
card marked "ST3." Replace the card.
2. Determine if the alarm still exists by issuing the test
synchronization r 4 to clear the alarm. If any test
repetitions fail, follow the procedures for those failures. If
the problem persists after you have performed this
procedure three times, follow normal escalation
procedures.
Table 10-580. TEST #649 Stratum 3 Clock Alarm Query — Continued
Error
Code
Tes t
Result Description/Recommendation
Continued on next page
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