Panasonic KX-FC965RU Service Manual ▷ View online
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KX-FC965RU-T
6.5.3.
Recording Paper Sensor (SW101)
When there is no recording paper, the plate is separated from the switch lever and the switch turns off. Pin 45 of IC10 becomes a
high level. When there is recording paper, the plate pushes the switch lever and the switch turns ON. Pin 45 of IC10 becomes a low
level.
high level. When there is recording paper, the plate pushes the switch lever and the switch turns ON. Pin 45 of IC10 becomes a low
level.
6.5.4.
Hook Switch (SW103)
When the handset is lifted, the switch turns ON, and the signal at pin 19 of IC10 becomes low.
When the handset is returned, the switch turns OFF, and the signal at pin 19 of IC10 becomes high.
When the handset is returned, the switch turns OFF, and the signal at pin 19 of IC10 becomes high.
Digital Board
Analog Board
Signal (IC10-45 Pin)
Paper
Low level
No paper
High level
SW
Signal
ON-Hook
OFF
High level (IC10-19 pin)
OFF-Hook
ON
Low level
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KX-FC965RU-T
6.5.5.
Jam Sensor (SW102)
The JAM sensor is a detection switch for determining whether the recording paper edge is in the correct position or not. If the
recording paper cannot be detected correctly at the JAM sensor position even when recording paper is present, then JAM is dis-
played. If the recording paper is at the sensor position, then the switch turns on the IC10-119 pin switches to a high level.
recording paper cannot be detected correctly at the JAM sensor position even when recording paper is present, then JAM is dis-
played. If the recording paper is at the sensor position, then the switch turns on the IC10-119 pin switches to a high level.
6.5.6.
Document Top SW (SW338)
When a document is brought to the read position, the SW becomes ON, and the input signal of IC1-16 pin (Operation) becomes a
low level. When there is no document at the read position, the SW becomes OFF, and the input signal of IC1-16 pin (Operation)
becomes a high level.
low level. When there is no document at the read position, the SW becomes OFF, and the input signal of IC1-16 pin (Operation)
becomes a high level.
Operation Board
Analog Board
Signal (IC10-119 Pin)
Paper
Low level
No paper
High level
Signal (IC1-5 pin)
Out of the Read Position
High level
At the Read Position
Low level
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KX-FC965RU-T
6.5.7.
Document Set SW (SW339)
When a document is set, the SW becomes ON, and input signal of IC1-6 pin (Operation) becomes a low level.
When there is no document, the SW becomes OFF, and the input signal of IC1-6 pin (Operation) becomes a high level.
When there is no document, the SW becomes OFF, and the input signal of IC1-6 pin (Operation) becomes a high level.
Operation Board
Signal (IC1-6 pin)
No document
High level
Set document
Low level
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KX-FC965RU-T
6.6.
Modem Section
6.6.1.
Function
The unit uses a 1 chip modem (IC3) that serves as an interface between the control section for FAX transmission and reception
and the telephone line. During a transmitting operation, the digital image signals are modulated and sent to the telephone line.
During a receiving operation, the analogue image signals which are received via the telephone line are demodulated and con-
verted into digital image signals. The communication format and procedures for FAX communication are standardized by ITU-T.
This 1 chip modem (IC3) has hardware which sends and detects all of the necessary signals for FAX communication.
It can be controlled by writing commands from the CPU (IC10: inside ASIC) to the register in the modem (IC3).
This modem (IC3) also sends DTMF signals, generates a call tone (from the speaker), and detects a busy tone and dial tones.
and the telephone line. During a transmitting operation, the digital image signals are modulated and sent to the telephone line.
During a receiving operation, the analogue image signals which are received via the telephone line are demodulated and con-
verted into digital image signals. The communication format and procedures for FAX communication are standardized by ITU-T.
This 1 chip modem (IC3) has hardware which sends and detects all of the necessary signals for FAX communication.
It can be controlled by writing commands from the CPU (IC10: inside ASIC) to the register in the modem (IC3).
This modem (IC3) also sends DTMF signals, generates a call tone (from the speaker), and detects a busy tone and dial tones.
Overview of Facsimile Communication Procedures (ITU-T Recommendation):
1. ON CCITT (International Telegraph and Telephone Consultative Committee)
The No. XIV Group of CCITT, one of the four permanent organizations of the International Telecommunications Union (ITU),
investigates and make recommendations on international standards for facsimiles.
2. Definition of Each Group
1. ON CCITT (International Telegraph and Telephone Consultative Committee)
The No. XIV Group of CCITT, one of the four permanent organizations of the International Telecommunications Union (ITU),
investigates and make recommendations on international standards for facsimiles.
2. Definition of Each Group
• Group I (G1)
Official A-4 size documents without using formats which reduce the band width of a signal are sent over telephone lines.Deter-
mined in 1968.
Transmission for about 6 minutes at a scanning line density of 3.85 lines/mm.
mined in 1968.
Transmission for about 6 minutes at a scanning line density of 3.85 lines/mm.
• Group II (G2)
Using reduction technology in the modulation/demodulation format, an A-4 size document is sent at an official scanning line den-
sity of 3.85 lines/mm for about 3 minutes.
Methods to suppress redundancy are not used.
Determined in 1976.
sity of 3.85 lines/mm for about 3 minutes.
Methods to suppress redundancy are not used.
Determined in 1976.
• Group III (G3)
Method of suppressing redundancy in the image signal prior to modulation is used. An A-4 size document is sent within about
one minute.
Determined in 1980.
one minute.
Determined in 1980.
• Group IV (G4)
Transmission is via the data network. A method is provided for suppressing redundancy in signals prior to transmission, and
error-free reception of transmission is possible.
The scope of these facsimile applications is not limited simply to transmission of written statements. Through symbiotic linkages
with other communication methods, it can be expected to expand to include integrated services.
error-free reception of transmission is possible.
The scope of these facsimile applications is not limited simply to transmission of written statements. Through symbiotic linkages
with other communication methods, it can be expected to expand to include integrated services.
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