Ricoh D0C8, Service Manual

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SM 7-33 D0CA/D0C9/D0C8/D0CB
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7.3.5 SCANNING POSITION CORRECTION
By changing SP4-020-001 (Dust Check Dust Detect:On/Off), when dirt is detected at the
scanning position, the scanning position may be changed to avoid the dirt.
(If it cannot be avoided, an alert is displayed on the operation panel advising the user to perform
target glass cleaning).
Likewise, the scanning position correction can be switched on/off for the back of the original by
SP4-020-011 (Dust Detect Level: Rear).
Image diagram
[A]: Scanning position
[B]: Sheet-through exposure glass
[C]: Dirt
• Dirt is detected when a document passes through, so the alert will not disappear until
the scanning of the next document begins, even after the sheet-through exposure
glass cleaning is performed.
• If dirt is detected not on the sheet-through exposure glass but on the background
guide plate, the alert will not disappear even if the glass is wiped.
• The time required for the first copy is slightly (almost imperceptibly) longer.
• The detection threshold value can be changed using SP4-020-002 (Dust Check Dust
Detect:Lvl). Likewise, the detection level on the back of the original can be changed
with SP4-020-012 (Correction Level: Rear). (The larger the value is, the smaller the
dirt particles that can be detected become.)
• It is prohibited to change the setting of SP4-020-003 (Dust Check Lvl Dust Reject:Lvl).