Panasonic KX-FC968RU Service Manual ▷ View online
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KX-FC968RU-T
6.5.1.
Document Top Sensor (SW338)
When a document is brought to the read position, the SW turns ON, and the input signal of IC1-5 pin (Operation Board) becomes a
low level. When there is no document at the read position, the SW turns OFF, and the input signal of IC1-5 pin (Operation Board)
becomes a high level.
low level. When there is no document at the read position, the SW turns OFF, and the input signal of IC1-5 pin (Operation Board)
becomes a high level.
6.5.2.
Document Set Sensor (SW339)
When a document is set, the SW turns ON, and the input signal of IC1-6 pin (Operation Board) becomes a low level. When there is
no document, the SW turns OFF, and the input signal of IC1-6 pin (Operation Board) becomes a high level.
no document, the SW turns OFF, and the input signal of IC1-6 pin (Operation Board) becomes a high level.
SW
Signal (IC1-5 pin)
Out of the Read Position
OFF
High level
At the Read Position
ON
Low level
SW
Signal (IC1-6 pin)
No document
OFF
High level
Set document
ON
Low level
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KX-FC968RU-T
6.5.3.
Cover Open Sensor / Paper Sensor (SW102)
When the recording paper is loaded on the print head and the cover is closed, the paper sensor SW turns ON, and the input signal
of IC10-43 pin (Digital Board) becomes a low level. Usually, the SW turns OFF, and the input signal of IC10-43 pin (Digital Board)
becomes a high level.
of IC10-43 pin (Digital Board) becomes a low level. Usually, the SW turns OFF, and the input signal of IC10-43 pin (Digital Board)
becomes a high level.
6.5.4.
Jam Sensor (SW101)
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 PAPER
JAMMED is displayed. If the recording paper is at the sensor position, then the switch turns on the IC10-45 pin switches to a high
level.
recording paper cannot be detected correctly at the JAM sensor position even when recording paper is present, then PAPER
JAMMED is displayed. If the recording paper is at the sensor position, then the switch turns on the IC10-45 pin switches to a high
level.
SW
Signal (IC10-43 pin)
Set recording paper and cover is closed
ON
Low level
No recording paper or cover is open
OFF
High level
Analog Board
SW
Signal (IC10-45 Pin)
Paper
ON
Low level
No paper
OFF
High level
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KX-FC968RU-T
6.5.5.
Cutter Position Sensor
6.5.6.
Motor Position Sensor
When the recording paper is loaded on the print head, the SW turns ON, and the input signal of IC10-119 pin (Digital Board)
becomes a low level. When the recording paper is not loaded on the print head, the SW turns OFF, and the input signal of IC10-119
pin (Digital Board) becomes a high level.
becomes a low level. When the recording paper is not loaded on the print head, the SW turns OFF, and the input signal of IC10-119
pin (Digital Board) becomes a high level.
SW
Signal (IC10-39 pin)
Home position
OFF
Low level
Others
ON
High level
Signal (IC10-119 pin)
Home position
Low level
Other
High level
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KX-FC968RU-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
converted 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).
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
converted 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).
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.
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.
Determined in 1968.
Transmission for about 6 minutes at a scanning line density of 3.85 lines/mm.
Determined 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
density of 3.85 lines/mm for about 3 minutes.
Methods to suppress redundancy are not used.
Determined in 1976.
density 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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