GAI-Tronics 751-905 Smart SERIES Manuale - Pagina 9

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751-905 SmartSeries

Speaker Amplifier

Internal Adjustments

There are no internal adjustments that are recommended to be made by the customer.

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

Problem

Any problem with

station performance

Speaker volume needs

adjustment

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Remove the assembly from the enclosure and examine it carefully for obvious

faults such as unconnected plugs, loose connections where the wires connect

to the 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 standard

dumb station 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 6.

Possible Solution

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AGE