GAI-Tronics 701-902 SmartSeries Руководство пользователя - Страница 11

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701-902 S

MART

ERIES

Troubleshooting

The following table lists some hints to aid technicians in troubleshooting.

Problem

Any problem with

station performance

Speaker volume needs

adjustment

Incoming handset

speech level needs

adjustment

Acoustic feedback or

speech distortion

during page or party

operation

The user hears himself

when speaking

Feedback during page

only

Crosstalk

f:\standard ioms - current release\42004 instr. manuals\42004-658l2g.doc

03/12

ANDSET

PEAKER

MPLIFIER

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.

: When replacing the assembly, perform the following steps:

OTE

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.

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.

Use the Rcvr Vol control to adjust the handset receiver volume. Refer to the

"Adjustments" section of this document.



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.



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).

Likely to be external to the assembly and related to system cable faults.

Possible Solution

Pub. 42004-658L2G

10 of 14

AGE