Panasonic KX-TS2356UAB / KX-TS2356UAW (serv.man3) Service Manual ▷ View online
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KX-TS2356UAB/KX-TS2356UAW
4.2.4.2.
Circuit operation
When the batteries is inserted into the unit, then the voltage is regulated by IC302 and power is supplied to the CPU. The set
can operate beyond point A in the circuit voltage diagram.
can operate beyond point A in the circuit voltage diagram.
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KX-TS2356UAB/KX-TS2356UAW
4.2.5.
Caller ID Detect Circuit
4.2.5.1.
Function (FSK signal)
The caller ID is a changeable ID which the user of a telephone circuit obtains by entering a contract with the telephone company to
utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has been entered for
the circuit being used. The data for the caller ID from the telephone exchange is sent during the interval between the first and sec-
ond rings of the bell signal. The data from the telephone exchange is a modem signal which is modulated in an FSK (Frequency
Shift Keying) format. Data "0" is a 1200 Hz sine wave, and data 1 a 2200 Hz sine wave.There are two types of the message format
which can be received: i.e. the single message format and plural message format. The plural message format allows to transmit the
name and data code information in addition to the time and telephone number data.
utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has been entered for
the circuit being used. The data for the caller ID from the telephone exchange is sent during the interval between the first and sec-
ond rings of the bell signal. The data from the telephone exchange is a modem signal which is modulated in an FSK (Frequency
Shift Keying) format. Data "0" is a 1200 Hz sine wave, and data 1 a 2200 Hz sine wave.There are two types of the message format
which can be received: i.e. the single message format and plural message format. The plural message format allows to transmit the
name and data code information in addition to the time and telephone number data.
4.2.5.2.
Circuit operation
Caller ID signal is sent through the circuit via the following path:
LINE
LINE
→ C501/C502 → C551/C552 → R551/R552 → R553/R554 → IC801 (pin 92, 93)
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KX-TS2356UAB/KX-TS2356UAW
5 Location of Controls and
Components
5.1.
Controls
5.2.
Display
Cross Reference:
Battery Installation and Replacement (P.13)
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KX-TS2356UAB/KX-TS2356UAW
6 Installation Instructions
6.1.
Connections
6.2.
Connecting a Communication Device
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