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11.2.2. Troubleshooting (Scanning Failure)
Note: Procedure for cleaning the Image Sensor.
1. Remove the Image Sensor Module. (See 8.2.11-(1), (2), and (3).)
2. Use the blower to blow the dust attached to the surface of the Image Sensor.
2. Use the blower to blow the dust attached to the surface of the Image Sensor.
Phenomenon
Conceivable cause
Check contents
Remarks
Scanned image is
dark.
dark.
Screen mechanical problem
1. Check Screen tension
Image Sensor problem
1. Check Image Sensor control signal (RELAY Board).
SI: 6th pin (for CN401, CN402, CN403, and CN404)
CLK: 8th pin (for CN401, CN402, CN403, and CN404)
SIG: 1st pin (for CN401, CN402, CN403, and CN404)
CLK: 8th pin (for CN401, CN402, CN403, and CN404)
SIG: 1st pin (for CN401, CN402, CN403, and CN404)
2. Replace the Image Sensor.
Image processing circuit is not correctly
operating.
operating.
1. Perform scanning test and check the results.
2. Replace IC1015, IC1016, and the board.
2. Replace IC1015, IC1016, and the board.
Scanned image is
light.
light.
Shading area is not clean.
Clean the shading area.
Image processing circuit is not correctly
operating.
operating.
1. Perform scanning test and check the results.
2. Replace IC1015, IC1016, and the board.
2. Replace IC1015, IC1016, and the board.
White streak, white
band
band
Image Sensor adjustment is
inappropriate.
inappropriate.
Perform Image Sensor adjustment. (See Sec. 10.)
Black streak, black
band
band
Image Sensor is not clean.
Clean the Image Sensor surface. (See Note.)
The light amount of the Image Sensor
is decreased.
is decreased.
Replace the Image Sensor.
Black dot, black
steak
steak
Screen (Film) is damaged or not clean. 1. Check and clean the screen surface.
2. Adjust the slice level. (See 10.2.)
3. Replace the screen.
3. Replace the screen.
Image distortion
Screen tension is inappropriate.
Check the screen tension.
Image Sensor adjustment is inappropri-
ate.
ate.
Perform Image Sensor adjustment. (See Sec. 10.)
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