Canon PIXMA MP640, Руководство по обслуживанию, Страница: 7 / 57

1-3. Special Tools
1-4. Sensors
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Name Tool No. Application Remarks
FLOIL KG-107A QY9-0057-000 To the carriage rail sliding portions. In common with the MP610, etc.
No. Sensor Function Possible problems
1 Scanner open sensor Detects opening and closing of the
scanning unit (cover). - The carriage does not move to the center even when
the scanning unit is opened.
2 FB encoder sensor Detects rotation of the scanner motor,
and controls scanning operation. - Faulty scanner
- FB motor error
- Faulty scanned or copied images
3 Inner cover sensor Detects opening and closing of the inner
cover. - The inner cover is open when it should be closed.
- The inner cover is closed when it should be opened.
4 PE sensor Detects the leading and trailing edges of
paper. - No paper
- Paper jam
5 ASF cam sensor Detects the position of the ASF cam (for
paper feeding from the rear tray). - ASF cam sensor error
- Paper feeding problem
6 APP encoder sensor Detects rotation of the APP encoder, and
controls paper feeding and purging
operation. - APP sensor error
- APP position error
7 Carriage encoder
sensor Detects the position of the carriage. - Carriage position error
- Printing shifts from the correct position.
- Uneven printing
- Strange noise
8 Temperature & Ink
amount sensor Detects the temperature of the inside of
the machine and the remaining ink
amount. - Internal temperature error
- Low-ink or out-of-ink warning
9 Ink sensor Detects the position of an ink tank. - Wrong position of an ink tank
- Installation of multiple ink tanks of the same color
- No recognition of an ink tank
10 LF encoder sensor Detects rotation of the LF encoder, and
controls paper feeding. - LF position error
- Uneven printing
11 Eject encoder sensor Detects rotation of the eject encoder, and
controls paper feeding. - LF position error
- Uneven printing
12 Valve cam sensor Detects the position of the purge valve
cam, and controls purging operation. - Valve cam sensor error
13 Pump roller sensor Detects the position of the pump roller,
and controls purging operation. - Pump roller sensor error
14 Purge cam sensor Detects the position of the purge main
cam, and controls purging operation. - PG cam sensor error
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