Maintenance-Object Repair Procedures
555-233-143
8-316 Issue 1 May 2002
129 FAIL The reflective 404-Hz tone test failed, no transmission was detected to or from
the port. The problem may be off-board.
131 FAIL The reflective 1004-Hz tone test failed. No transmission was detected to or
from the port. The problem may be off-board.
133 FAIL The reflective 2804-Hz tone test failed. No transmission was detected to or
from the port. The problem may be off-board.
1. To make sure the problem is on-board, disconnect the port from the
auxiliary equipment and retry test.
2. If the test fails, replace the circuit pack. Otherwise, if the test passed after
disconnecting the port from the auxiliary equipment, the problem is
off-board. Check the wiring and connections to the auxiliary equipment
and retry the test after reconnecting the port to the auxiliary equipment. If
the test fails, check the auxiliary equipment. See the preceding procedure
for a failure with Error Code 7.
NOTE:
If the Looparound and Conference test fails for every port on a circuit
pack, a -5 Volt power problem is indicated. If a TN736 or TN752 power
unit circuit pack is present, the 631DB AC power unit or the 676B power
unit may be defective. The system may contain either a TN736 or a
TN752 power unit circuit pack OR a 631DB power unit, but not both
types of power units. To investigate power problems, see ‘‘CARR-POW
(Carrier Power Supply)’’ on page 8-393.
PASS Looparound and Conference test is successful. This port is functioning
properly.
Table 8-137. Test #33 Looparound and Conference Test — Continued
Error
Code
Tes t
Result Description / Recommendation
Continued on next page
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