Service Documentation
99
Audio loop test
With the handset lifted, the transmitter and receiver capsules are
bridged with a test loop. By blowing into the mouthpiece the tester
can check the general functioning state of the transmitter and re-
ceiver components.
RAM test
A function test of the RAM area is carried out with reading and
writing, and a corresponding acknowledge appears on the display.
Diagnosis:
00=End?
>
Choose "Audio loop test"
Diagnosis:
04=Audio loop test?
>
Confirm
Blow into the handset
microphone
Audio loop test
continue?
>
G
End test
Diagnosis:
04=Audio loop test?
>
Diagnosis:
00=End?
>
Choose "RAM test"
Diagnosis:
05=RAM test?
>
Confirm
RAM OK
continue?
>
End of test
G
End test
Diagnosis:
05=RAM test?
>
