Panasonic KX-FLB883RU Service Manual ▷ View online
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KX-FLB883RU
6.12.2. Paper Sensor
This Switch detects whether there are recording papers in the paper tray #1 or not.
When there are recording papers in the tray, the input signal of IC300-M31pin becomes low level.
When there no recording papers in the tray, the input signal of IC300-M31pin becomes high level.
When there are recording papers in the tray, the input signal of IC300-M31pin becomes low level.
When there no recording papers in the tray, the input signal of IC300-M31pin becomes high level.
6.12.3. Pickup Sensor
This Switch detects whether a recording paper is picked up or not.
When there is a recording paper at the position of the switch, the input signal of IC300-M32pin becomes low level.
When there is no recording paper at the position of the switch, the input signal of IC300-M32pin becomes high level.
When there is a recording paper at the position of the switch, the input signal of IC300-M32pin becomes low level.
When there is no recording paper at the position of the switch, the input signal of IC300-M32pin becomes high level.
Signal (IC300-M31pin)
Paper exist
Low level
No papers
High level
Signal (IC300-M32pin)
A paper exists
Low level
No papers
High level
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KX-FLB883RU
6.12.4. Exit Sensor
This sensor detects whether the recording paper exits or not.
When there is a recording paper at the position of the sensor, the input signal of IC300-L33pin becomes low level.
When there is no recording paper at the position of the sensor, the input signal of IC300-L33pin becomes high level.
When there is a recording paper at the position of the sensor, the input signal of IC300-L33pin becomes low level.
When there is no recording paper at the position of the sensor, the input signal of IC300-L33pin becomes high level.
6.12.5. Home Sensor
This sensor detects whether the carriage is at it's home position or not.
When the carriage is at it's home position, a shelter plate closes the sensor light.
So the photo-transistor turns off and the input signal of IC300-J32pin becomes high level.
When the carriage is not at it's home position, a shelter plate lets the sensor light pass.
So the photo-transistor turns on and the input signal of IC300-J32pin becomes low level.
When the carriage is at it's home position, a shelter plate closes the sensor light.
So the photo-transistor turns off and the input signal of IC300-J32pin becomes high level.
When the carriage is not at it's home position, a shelter plate lets the sensor light pass.
So the photo-transistor turns on and the input signal of IC300-J32pin becomes low level.
Signal (IC300-L33pin)
A paper exists
Low level
No papers
High level
Photo-transistor
Signal (IC300-J32pin)
A carriage is at home.
OFF
High level
A carriage is not at home. ON
Low level
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KX-FLB883RU
6.12.6. Read Position Sensor
This sensor detects the front edge of the document.
When the front edge of the document is detected, the shelter plate closes the sensor light.
So the photo-transistor turns off and the input signal of IC300-G34pin becomes high level.
When the front edge of the document is not detected, the shelter plate lets the sensor light pass.
So the photo-transistor turns on and the input signal of IC300-G34pin becomes low level.
When the front edge of the document is detected, the shelter plate closes the sensor light.
So the photo-transistor turns off and the input signal of IC300-G34pin becomes high level.
When the front edge of the document is not detected, the shelter plate lets the sensor light pass.
So the photo-transistor turns on and the input signal of IC300-G34pin becomes low level.
6.12.7. Registration & Manual Paper Sensor
This sensor detects whether the recording paper is at the sensor position.
When the recording paper is detected, the shelter plate lets the sensor light pass.
So the photo-transistor turns on, and input signal of IC300-P31pin becomes low level.
When the recording paper is not detected, the shelter plate closes the sensor light.
So the photo-transistor turns off, and input signal of IC300-P31pin becomes high level.
When the recording paper is detected, the shelter plate lets the sensor light pass.
So the photo-transistor turns on, and input signal of IC300-P31pin becomes low level.
When the recording paper is not detected, the shelter plate closes the sensor light.
So the photo-transistor turns off, and input signal of IC300-P31pin becomes high level.
Photo-transistor
Signal (IC300-G34pin)
A document exits
OFF
High level
No document
ON
Low level
Photo-transistor
Signal (IC300-P31pin)
Paper exits
ON
Low level
No paper
OFF
High level
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KX-FLB883RU
6.12.8. Print Timing Sensor
This sensor detects whether the recording paper is at the printing position.
When the recording paper is detected, the shelter plate lets the sensor light pass.
So the photo-transistor turns on, and input signal of IC300-F34pin becomes low level.
When the recording paper is not detected, the shelter plate closes the sensor light.
So the photo-transistor turns off, and input signal of IC300-F34pin becomes high level.
When the recording paper is detected, the shelter plate lets the sensor light pass.
So the photo-transistor turns on, and input signal of IC300-F34pin becomes low level.
When the recording paper is not detected, the shelter plate closes the sensor light.
So the photo-transistor turns off, and input signal of IC300-F34pin becomes high level.
6.12.9. Document Sensor
This sensor detects whether a document is set in ADF or not.
When a document is set in ADF, the shelter plate closes the sensor light.
So the photo-transistor turns off, and input signal of IC300-H32pin becomes high level.
When a document is not set in ADF, the shelter plate lets the sensor light pass.
So the photo-transistor turns on, and input signal of IC300-H32pin becomes low level.
When a document is set in ADF, the shelter plate closes the sensor light.
So the photo-transistor turns off, and input signal of IC300-H32pin becomes high level.
When a document is not set in ADF, the shelter plate lets the sensor light pass.
So the photo-transistor turns on, and input signal of IC300-H32pin becomes low level.
Photo-transistor
Signal (IC300-F34pin)
Paper exits
ON
Low level
No paper
OFF
High level
Photo-transistor
Signal (IC300-H32pin)
document exits
OFF
High level
No document
ON
Low level
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