GAI-Tronics 701-905 SmartSeries Handset/Speaker Amplifier - Manual (Page 12)

Pub. 42004-685L2D
701-905 S MART S ERIES
®
H ANDSET /S PEAKER A MPLIFIER P AGE 11 of 15
f:\standard ioms - current release\42004 instr. manuals\42004-685l2d.doc
03/12
Troubleshooting
The following table lists some hints to aid technicians in troubleshooting.
Problem Possible Solution
Any problem with
station performance Remove the assembly from the enclosure and examine it carefully for obvious
faults such as unconnected plugs, loose connections where the wires from the
handset and hookswitch connect to the Handset/FSK/
P PCBA, and so on.
Determine whether the fault is in the assembly, or in the system, by plugging
in a known good spare assembly (set to the same address as the assembly
removed). If the fault is in the assembly, remove it for repair.
N OTE : When replacing the assembly, perform the following steps:
1. Set the address on the new assembly to 0, 3.
2. Plug the assembly into the enclosure.
3. After about 10 seconds, remove the assembly. The station is now set up
to request a download of configuration variables from the MCU.
4. Set the unit to the correct address. Set the address to 0, 4 for conventional
Page/Party ® operation or consult the ADVANCE system manual for
address assignment information.
5. Plug the assembly back into the enclosure. The station initiates a
configuration download request (ADVANCE systems only). The time
required to complete the download depends upon system configuration
and system activity, but several seconds is typical.
Speaker volume needs
adjustment Use the USER ADJ control to adjust the Minimum Level, Offset Level, or
VLC Level (as appropriate). Refer to the “Adjustments” section on page 8.
Incoming handset
speech level needs
adjustment Use the R CVR V OL control to adjust the handset receiver volume. Refer to the
“Adjustments” section of this document.
Acoustic feedback or
speech distortion
during page or party
operation
or
The user hears himself
when speaking  If the problem affects all stations, the line may not be terminated
correctly, may have loose connections, or a short to ground. Line balance
connections are critical.
 If the problem affects only this assembly, the problem may be with its
sidetone setting. Contact the GAI-Tronics Field Service Department.
Feedback during page
only  Check within the enclosure for a purple wire on terminal 7: this is the
default setting for local speaker mute. If the wire is on terminal 8, then
the speaker is unmuted and may be causing feedback. Connect the wire
to terminal 7.
 An adjacent speaker could be causing feedback. If an adjacent speaker is
the source of the feedback, adjust the orientation of the speaker so that it
is not aimed directly at the station. As a last resort, enable the mutual
muting function of the station. This is done by interconnecting terminal 7
of the two stations with the spare orange wire in the system cable (if this
wire is available).
Crosstalk Likely to be external to the assembly and related to system cable faults.