Panasonic KX-FC965RU Service Manual ▷ View online
49
KX-FC965RU-T
6.7.6.
Calling Line Identification Circuit (Russian)
1. Function
The CID data is received after the bell rings while the phone is off-hook.The CID data consists of the dual tone signal com-
bined 700Hz, 900 Hz, 1100Hz and so on, which has unique frequency being different from usual dual tone signal.
Strictly speaking, 500Hz ACK signal is transmitted to the line to request the exchanger to send the Russian CID data. Then
the dual tone signal will be transmitted from the exchanger. The calling party’s number is recognized by the digital number
corresponding to the dual tone.
The data frame consists of 9 digits; start code, category code and 7 digits of calling party’s telephone number.
bined 700Hz, 900 Hz, 1100Hz and so on, which has unique frequency being different from usual dual tone signal.
Strictly speaking, 500Hz ACK signal is transmitted to the line to request the exchanger to send the Russian CID data. Then
the dual tone signal will be transmitted from the exchanger. The calling party’s number is recognized by the digital number
corresponding to the dual tone.
The data frame consists of 9 digits; start code, category code and 7 digits of calling party’s telephone number.
2. Circuit Operation:
The Russian CID signal from the telephone line is processed through the BBIC IC8 (cordless base). For further information
about Russian CID signal path, refer to Check Sheet for Signal Route (P.134)
about Russian CID signal path, refer to Check Sheet for Signal Route (P.134)
6.7.7.
Calling Line Identification Circuit (Western)
1. Function
This unit is compatible with the Caller ID service offered by your local telephone company. To use this feature, you must sub-
scribe to a Caller ID service. The data for the caller ID from the telephone exchange is sent during the interval between the
first and second 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 1300 Hz sine wave, and data 1 a 2100 Hz sine wave.
There are two type of the message format which can be received:i.e.the single data message format and multiple data mes-
sage format.
The multiple data format allows to transmit the name and data code information in addition to the time and telephone number
data.
When there is multiple data in the unit, the name or telephone number are displayed.
scribe to a Caller ID service. The data for the caller ID from the telephone exchange is sent during the interval between the
first and second 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 1300 Hz sine wave, and data 1 a 2100 Hz sine wave.
There are two type of the message format which can be received:i.e.the single data message format and multiple data mes-
sage format.
The multiple data format allows to transmit the name and data code information in addition to the time and telephone number
data.
When there is multiple data in the unit, the name or telephone number are displayed.
2. Circuit Operation:
Refer to Check Sheet for Signal Route (P.134) for the route of caller ID signal.
6.8.
Transmitter/Receiver (Cordless)
Base Unit and Cordless Handset mainly consist of RF Module and DECT BBIC.
Base Unit and Cordless Handset transmit/receive voice signal and data signal through the antenna on carrier frequency.
Base Unit and Cordless Handset transmit/receive voice signal and data signal through the antenna on carrier frequency.
6.8.1.
Transmitter Block
The voice signal input from the TEL LINE interface goes to RF Module (RFM1) through DECT BBIC (IC2).
The voice signal passes through the analog part of IC2 where it is amplified and converted to a digital audio stream signal. The
burst switch controller processes this stream performing encryption and scrambling, adding the various other fields to produce
the GAP (Generic Access Profile) standard DECT frame, assigning to a time slot and channel etc.
In RFM1, the carrier frequency is changing, and frequency modulated RF signal is generated and amplified, and radiated from
antenna. Cordless Handset detects the voice signal or data signal in the circuit same as the following explanation of Receiver
Block.
The voice signal passes through the analog part of IC2 where it is amplified and converted to a digital audio stream signal. The
burst switch controller processes this stream performing encryption and scrambling, adding the various other fields to produce
the GAP (Generic Access Profile) standard DECT frame, assigning to a time slot and channel etc.
In RFM1, the carrier frequency is changing, and frequency modulated RF signal is generated and amplified, and radiated from
antenna. Cordless Handset detects the voice signal or data signal in the circuit same as the following explanation of Receiver
Block.
6.8.2.
Receiver Block
The signal of 19.2 MHz band (18.81792 MHz ~ 18.97344 MHz) which is input from antenna is input to RFM1.
In RFM1, the signal of 19.2 MHz band is downconverted to 864 kHz signal and demodulated, and goes to IC2 as GAP (Generic
Access Profile) standard DECT frames. It passes through the decoding section burst switch controller where it separates out the
frame information and performs de-encryption and de-scrambling as required. It then goes to the DSP section where it is turned
back into analog audio. This is amplified by the analog front end, and goes to the TEL LINE Interface.
In RFM1, the signal of 19.2 MHz band is downconverted to 864 kHz signal and demodulated, and goes to IC2 as GAP (Generic
Access Profile) standard DECT frames. It passes through the decoding section burst switch controller where it separates out the
frame information and performs de-encryption and de-scrambling as required. It then goes to the DSP section where it is turned
back into analog audio. This is amplified by the analog front end, and goes to the TEL LINE Interface.
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KX-FC965RU-T
6.9.
Operation Board Section
The unit consists of a LCD (Liquid crystal display), KEYs and LEDs (light-emitting diodes). They are controlled by the Gate Array
(IC1) and ASIC (IC10: on the DIGITAL BOARD). The key matrix table is shown below.
(IC1) and ASIC (IC10: on the DIGITAL BOARD). The key matrix table is shown below.
CN301
CN206
IC10
ASIC
LCD MODULE
GATE ARRAY
IC301
CN302
Document top sensor
Document set sensor
Document set sensor
8x5
KEYS
MATRIX
AUTO ANSWER
DIGITAL BOARD
OPERATION BOARD
KX-FC965RU OPERATION BOARD BLOCK DIAGRAM
XLED8, 9
KIN0~7
XLED13
KSL0~4
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KX-FC965RU-T
6.10. LCD Section
The Gate Array (IC301) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the crystal drive.
R303, R305, R306 and R307 are density control resistors.
Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC301).
R303, R305, R306 and R307 are density control resistors.
Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC301).
DIsplay mode
Density
Normal
Dark
2 lines (X1. 0)
LED1 (IC301-22pin)
H
L
XLED14 (IC301-20pin)
Hi-Z
L
XLED15 (IC301-21pin)
L
L
1 line (X1. 5)
LED1
H
H
XLED14
Hi-Z
Hi-Z
XLED15
Hi-Z
L
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KX-FC965RU-T
6.11. Power Supply Board Section
This power supply board uses the switching regulator method.
[Input Circuit]
The input current goes into the input rectifier circuit through the filter circuit. The filter circuit decreases the noise voltage and the
noise electric field strength.
The input current goes into the input rectifier circuit through the filter circuit. The filter circuit decreases the noise voltage and the
noise electric field strength.
[Rectifier Circuit]
The input current is rectified by D101,D102,D103 and D104 and charges C106 to make DC voltage. Then it supplies power to the
converter circuit.
The input current is rectified by D101,D102,D103 and D104 and charges C106 to make DC voltage. Then it supplies power to the
converter circuit.
[Kick-on voltage circuit]
Bias is applied to the Q101 gate via this circuit when the AC power is turned on and Q101 begins operating.
Bias is applied to the Q101 gate via this circuit when the AC power is turned on and Q101 begins operating.
Input
Circuit
Circuit
AC
Input
Input
Surge
absorber
circuit
absorber
circuit
G
H
4V
24V
Kick-on
Voltage
Circuit
Voltage
Circuit
E
IC101
F
GND
Control
Circuit
Circuit
R104
D110
Converter
Circuit
Circuit
C
D
4V
Output
Circuit
Output
Circuit
24V
Output
Circuit
Output
Circuit
+
-
Rectifier
Circuit
Circuit
A
B
C106
Error Detecting
Circuit
Circuit
Surge
absorber
circuit
absorber
circuit
Q101
A-B Voltage Wave Form
C-D Voltage Wave Form
E-F
G-H Voltage Wave Form
0
0
0
Block Diagram
9~6V
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