Panasonic KX-FP362BX Service Manual

7.10.2. TELEPHONE MONITOR1. FunctionThis is the function when you are not holding the handsetand can hear the caller’s voice from the line.2. Signal pathRefer to CHECK SHEET (P.105).7.10.3. HANDSET CIRCUIT1. FunctionThis circuit controls the conversation over the handset, i.e.the transmitted and received voices to and from thehandset.2. Signal path (Transmission signal)Refer to CHECK SHEET (P.105).3. Signal path (Reception signal)Refer to CHECK SHEET (P.105).7.10.4. SPEAKER PHONE CIRCUIT1. FunctionThe circuit controls the automatic switching of thetransmitted and received signals, to and from the telephoneline, when the unit is used in the hands-free mode.2. Circuit OperationThe speakerphone can only provide duplex.3. Signal pathRefer to CHECK SHEET (P.105).7.10.5. MONITOR CIRCUIT1. FunctionThis circuit monitors various tones, such as 1 DTMF tone,2Alarm/Beep/Key tone/Bell.2. Signal patha. DTMF MONITOR(Speaker Operation)Refer to CHECK SHEET (P.105).(Handset Operation)Refer to CHECK SHEET (P.105).b. ALARM/BEEP/KEY TONE/BELLRefer to CHECK SHEET (P.105).7.10. ITS (Integrated Telephone System) AND MONITOR SECTION7.10.1. GENERALDuring the monitor operation, the speaker output passes through the power amplifier (IC102) [Analog board].The DTMF signal is output from the modem (IC505: digital board). The alarm tone, the key tone, bell tone, and beep are outputfrom gate array IC501 (digital board). During a pulse dial operation, the monitor tone is output from gate array IC501.7.11. ATAS(Automatic Telephone Answering System) SECTION1. FunctionThe ATAS main operation is performed by the special IC505 (MODEM). IC522 (FLASH MEMORY)s control signals are inputfrom ASIC IC501.a. Greeting/Message Recordingb. ICM Recordingc. Greeting/Message/ICM play to speakerd. Greeting/Message/ICM play to Tel Linee. Vox Detection2. Signal PathRefer to CHECK SHEET (P.105).153KX-FP362BX