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Troubleshooting
Speakers
This test will identify open or grounded speaker lines via the VCM Speaker Sense current
(refer to Drawing KC1472). An alternative to the following test would be to place a meter or
meters across the D and E terminals of a target speaker to monitor dc resistance and/or resis-
tance to ground.
Step 1.
Dial #73, then enter the lowest or highest physical number of the group of speakers to be
tested. Test Option: After entering #73, enter the physical number of the VCM, press [1] and
then increment or decrement to the desired physical number with [ 7 or *] . This will allow
talk/listen audio from each speaker when tested.
Step 2.
Press [ 2 ] to turn on the speaker relay and note the following if a speaker is present:
Press [5] and verify the V goes off and the supervisory beep discontinues. If this doesn't
Step 3.
happen, another relay and speaker may be on.
Step 4.
Press [ 7] and verily the physical number in the display increments by one.
Step 5.
Return to Step 3 and repeat the above steps until all speakers have been tested.
Note:
Some tests require monitoring the HT display field. If the software in use is prior to version
102, a two-digit hexadecimal value will be displayed instead of the characters noted in the
procedures. If a hexadecimal value appears, use the following #73 Hexadecimal Equivalents
Table to interpret the display.
Find the displayed hexadecimal value under HEX and then locate the equivalent character set
under HT. Note that each character set may be represented by either one of two different
two-digit hexadecimal values. The H character represents the hook-switch status and the T
character is the Call-in Switch status.
HEX
00
02
03
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A supervisory beep occurs at the remote location.
A V appears in the display if there is an SC25 relay and speaker and the speaker
station does not have an activated privacy switch.
If the test option was selected in Step 1, room sounds will be audible at the test
phone. If there is no audio, a ground or activated privacy switch may be present.
#73 Hexadecimal Equivalents Table
HT
80
--G
82
--R
83
--N
HT
HEX
10
90
NG
12
92
NR
13
93
NN
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)
HEX
HT
18
98
+G
lA
9A
+R
1B
9B
+ N
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Do you have a question about the Telecenter IV and is the answer not in the manual?
Questions and answers
We have a Rauland Responder alarm that won’t go off
To troubleshoot a Rauland-Borg Telecenter IV alarm that won't go off, follow these steps based on general troubleshooting procedures:
1. Check for Duplicate Architectural Numbers:
- Dial #72 to find the physical number linked to the alarm’s architectural number.
- If duplication is found, change the architectural number using #99.
2. Inspect Call-In Switches:
- Faulty or stuck call-in switches may prevent alarms from clearing.
3. Perform RP2 Adjustment:
- Adjust the #744 call-in sensitivity (RP2) to correct false or unresponsive alarms.
4. Check for False Call-Ins:
- Disconnect the SC25 flat cable from the MIO.
- If the alarm stops, reconnect SC25 cables one at a time to identify a defective line.
5. Use Function #73 Diagnostics:
- Use this function to test hardware I/O and detect input errors related to the alarm.
These steps help identify and fix issues preventing the alarm from going off.
This answer is automatically generated