Konica Minolta BIZHUB 750 Service Manual page 40

6. SCANNER SECTION
(2) Shading correction
After completion of the home position search [4], the exposure unit conducts shading corrections. For shading
corrections, there are the following types of corrections: white correction 1 [5], white correction 2 [6], and black
correction [7]. For the shading correction at the time of the power ON, these corrections are carried out in a
series of operations. And after completion of the corrections, the exposure unit returns to the position at which
the platen APS is read [1]. When DF is open, the exposure unit stands by at the APS read position. And when it
is closed, however, the unit conducts the home position search to the position [3] at which DF is read.
[1] Position at which the platen APS is read
[2] Scanner home sensor (PS61)
[3] Position at which DF is read
[4] Completion of the home position search
[5] White correction 1
14
[3] [2]
Theory of Operation Ver1.0 Aug.2005
[1]
[4]
[5]
[6]
[7]
[9]
[10]
[8]
[6] White correction 2
[7] Black correction
[8] Home position search when DF is closed
[9] Exposure lamp (L1) on
[10] Movement of the exposure unit
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