Troubleshooting - Valcom PagePac Plus V-5323100 Manual

equipment. This feature is beneficial for page port of telephone system with control contact closure pair and
DTMF signaling..
Station access/CO mode is for access from PBX analog station, centrex or central office lines, providing 90
VAC ring voltage and 400 milisecond disconnect supervision.
The Ground Start mode is a two wire interface and has a 600 Ohm input impedance. When a trunk is
accessed, a momentary ground is sent to the ring-side of the pair by the host equipment, loop current is
detected and the tip-side of the pair is closed. Disconnect supervision of the ground start mode is accomplished
by monitoring the loop current.
Note: Ground start interface requires common ground between paging input and telephone system by
direct line or other common grounding methods.
The Loop Start mode is two wire interface and has a 600 Ohm input impedance. The host equipment draws
loop current from the talk-battery which is supplied by the Controller. Disconnect supervision of the loop start
mode is accomplished by monitoring the loop current.

TROUBLESHOOTING

Problems
Power LED not on
Page access extension
answer.
Background music cannot be heard.
Distorted, garbled or raspy sound from
all speakers.
Page access LED won't go off.
Talkback feature does not work.
Noisy Talkback.
Remote amplifier not receiving audio
Problems
Table 10. Troubleshooting
Verify power cord is connected at both ends.
Check for AC voltage at the wall socklet.
8 – pin Molex plug from AmpliCenter is wrong connector on Controller
AmpliCenter or Power Pack failed. Return for repair
does not No power to AmpliCenter.
Host telephone system not passing call through to Controller.
Telephone mode option switch on Controller not set correctly.
Ground Start – Tip and Ring reversed or Controller not grounded to host
system.
Input level not set correctly. Adjust music input level on AmpliCenter.
No power to music source. Verify power is on.
Radio off station. Adjust tuner.
A higher priority input is active
Music input wires crossed, with signal ground out.
Check programming options for music enable.
Short circuited speaker leads. Separate.
Music input level too high. Turn down.
Speaker leads grounded.
Speaker transformer shorted. Replace.
Failed AmpliCenter. Return for repair.
Page VOX not set to full counterclockwise position.
C1 lead inadvertenly grounded. If loop start or ground start, check that only 2
wires (Tip and Ring) are connected by modular plug cord.
Incorrect modular to modular cord connected between the Controller and the
modular jack of the D – series AmpliCenter.
Check the zone option switch, make sure that the switch is in the 70 Volt
position.
Check programming options for talkback enable.
Check the telephone mode switch on the AmpliCenter is set to Dry Loop, 600
Ohms mode.
Check wire to see if shielded cable was used. Change to shielded if
necessary.
Make sure shield for cable is only connected to the Controller or Zone
Expansion Unit end.
Remove shield at speaker cord.
Check audio connections on ) dBm or ) dBu.
Check the zone option switch is in the Contact Closure Output position.
Table 10. Troubleshooting (Continued)
38
Corrective Action
Corrective Action