Konica Minolta REGIUS 190, Service Manual

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4.3 Troubleshooting for Image Quality
REGIUS MODEL 190 Service Manual Ver.1.00 2004.11.01
4.3.7 Case 6: False contours can be seen in the image
4.3.8 Case 7: Jittering can be seen (i.e., zigzags in vertical lines)
4.3.9 Case 8: Image dimensions are incorrect (vertical direction)
4.3.10 Case 9: Image dimensions are incorrect (horizontal direction)
4.3.11 Case 10: The top and bottom of the image are disconnected.
•
If problems from cases 10 and 11 above repeats after resolution, inform to the manufacturer.
Phenomena Cause/Remedy
1
Phenomena only on the output fi lm. Check the imager.
2 Check the raw data using the Service Tool,
and if these contours are con
fi rmed.
• Bit loss from image data in the process after the ADB2.
• Replace the ADB2 and SCB2. " 2.7.4 Replacement of
ADB2 (A/D board), p.86" , " 2.7.3 Replacement of SCB2
(System Control Board), p.84" .
Phenomena Cause/Remedy
1 If this occurs with a 7-line interval. • Incorrect rotation of the polygon.
• Replace the optical unit (and polygon).
" 2.6.2 Replacement of Optical Unit, p.76"
2
H-SYNC signals are not being correctly
obtained. Con fi rm that the read-in timing for H-SYNC signals has not
changed and that the pulse waveform has not degraded. If
an abnormality is identi
fi ed, replace the optical unit.
" 2.6.2 Replacement of Optical Unit, p.76"
Phenomena Cause/Remedy
1
There is a problem with the Imager's image
size setting (i.e., 40
∫
).
Check the setting, and correct if necessary.
2
Printer type (imager) has been incorrectly
set. Check the settings and rectify where necessary.
Phenomena Cause/Remedy
1 PLL setting values have been replaced. Check the PLL setting values and modify if necessary.
Phenomena Cause/Remedy
1
The X-ray exposure fi eld aperture is not suit-
able.
Check the exposure fi eld.