Pub. 42004-638L2
Model 780/7805-301 Page/Party
®
Handset Stations for Cenelec Zone 1 Applications
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Troubleshooting
The table below describes possible solutions for some common problems.
Problem Solution
Speaker level requires
adjustment.
Adjust the Speaker Volume Control, labeled
USER
ADJ
, at the
amplifier.
Outgoing conversation level
requires adjustment.
Adjust Microphone Gain at the amplifier.
Incoming conversation level
requires adjustment.
Adjust the Receiver Volume Control at the amplifier.
Feedback/distortion (a hum or
buzz on the line) occurs during
all Page/Party
®
station operation.
1.
Adjust the Receiver Volume Control at the amplifier.
2.
The line may be improperly terminated. Inspect the system cable
for loose connections, shorts, and grounds. Line balance
assembly connections are critical.
Sidetone* requires adjustment.
*Hearing one’s own voice in the
receiver of the handset.
1.
Adjust the Receiver Sidetone at the amplifier.
2.
Check that the system cable connections to the resistors in the
line balance assembly are properly connected to the line balance
assembly resistors.
Crosstalk occurs.
One or more system cable pairs may be improperly terminated.
Visually inspect the system cable connections for accidental crossing
of the cable pairs or grounds.
Feedback during page of nearby
handset station.
Use the muting feature in the amplifier enclosure at the terminal
blocks.