RAP 15 No Acoustic Line Monitor
There are two source routes of the acoustic line monitor.
General communication signal
DP pulse signal
START
Has the Monitor Volume been set to LOW or HIGH?
Okifax 2200: User Function 05
Okifax 2400/2600: Technical Function 10
NO Set Monitor Volume to LOW or HIGH.
YES Replace the main control board.
Has the problem been resolved?
YES End of procedure.
NO Replace the speaker.
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Service Guide OF2200/2400/2600
Chapter 2 Failure Analysis
Page: 63