Filter
Top Products
DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-752HYB-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.
Table 10-209. TEST #57 Hybrid Circuit and Conference
Circuit Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page