Troubleshooting82 Installation Manual3.1 Troubleshooting3.1.1 InstallationPROBLEM PROBABLE CAUSE POSSIBLE SOLUTIONExtension does not operate. Bad printed circuit board. Exchange printed circuit board foranother printed circuit board.Bad connection between thesystem and extension.Take that extension and plug it intothe same extension port using a shorttelephone cord. If the telephone doesnot work, connection between thesystem and the extension must berepaired.Bad extension. Take that extension and plug it intoanother extension port that isworking. If the telephone does notwork, replace the phone.Improper reset operation. Press the reset button.Noise in external paging. Noise on the wire between thesystem and the amplifier.Use a shielded cable as theconnection wire between the systemand amplifier. A short shielded cableis recommended.Sound distortion from externalmusic source.Excessive input level fromexternal music source.Decrease the volume.Speed Dialling or One-TouchDialling does not function.Bad programming. Enter the CO port access number (9,81 through 84) when programming.Your Single line rotarytelephone does not function.The pulse dial from yourtelephone is disabled by thesystem.Select "Enable" in programme [121]Pulse Dial Reception Assignment.You forget your own extensionnumber.You can confirm your own extensionnumber if your telephone is providedwith a display. Press [PROGRAM][99] [6]. To exit from the mode, press[HOLD] [PROGRAM].