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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-686HYB-LINE (Hybrid Line)
10
57 FAIL Hybrid Circuit Test failed. This could result in noisy or bad connections.
1. This error can be caused by a disconnected terminal. First, ensure that
the terminal is connected and the wiring is OK.
2. Run circuit pack tests to check the Tone Generator circuit pack and
the Tone Detector circuit pack using the test board PCSS short
command.
3. Resolve any problems that are detected on the Tone Generator circuit
pack or Tone Detector circuit pack.
4. If the Tone Generator and Tone Detector circuit packs are functioning
properly, and the test still fails, replace the Hybrid Line circuit pack.
NOTE:
If the Hybrid Circuit and Conference Circuit Test fails for all ports 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
may be defective. (The 631DB power unit is used in a medium
cabinet powered by an AC source. The 645B power unit is used in a
medium cabinet powered by a DC power source.) The system may
contain either a TN736 or a TN752 power unit circuit pack OR a
631DB AC power unit,
but not both types of power units.
To
investigate problems with a 631DB AC power unit, refer to
CARR-POW (Carrier Port Power Unit for AC-Powered Systems)
Maintenance documentation. To investigate problems with a 645B
DC power unit, refer to CARR-POW (Carrier Port Power Unit for
DC-Powered Systems) Maintenance documentation.
PASS Hybrid Circuit and Conference Circuit Test passed. The hybrid circuitry is
transmitting properly.
1. If complaints still exist, investigate by using other port tests, and by
examining the station, wiring, and connections.
Table 10-228. TEST #57 Hybrid Circuit and Conference Circuit Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page