Toshiba e-STUDIO 4500c, Service Manual

Page: 213 / 1120

SCANNER UNIT August, 2006
3-26
3.3.2 LENS BLOCK, PAPER SIZE SENSORS
Before you remove the lens block, note the settings of SP4800 001 to 003 (ARDF
density adjustments for R, G, B).
SP4800 001 DF Density Adj: R ARDF Density Adjustment - Red
SP4800 002 DF Density Adj: G ARDF Density Adjustment - Green
SP4800 003 DF Density Adj: B ARDF Density Adjustment - Blue
Remove:
•
Exposure glass. ( 3.3.1)
[A]: Lens cover ( x8)
[B]: Lens block ( x6, x3)
Important: Remove the lens block carefully to avoid damaging the attached
PCB. Do not touch the paint-locked screws on the lens block.
[C]: Original width sensor ( x1, x1)
[D]: Original length sensors x2 ( x1 each, x1 each)
After replacing the lens block, do the following SP codes.
SP4008 001 Sub Scan Mag Sub Scan Magnification Adjustment
SP4010 001 Sub Scan Reg Sub Scan Registration Adjustment
SP4011 001 Main Scan Reg Main Scan Registration Adjustment
After lens block replacement, do some copy samples with the ARDF. Check these
points:
•
Do the copies have background?
•
Is the copy output of the ARDF and platen mode different?
If these problems occur, change SP4800 001 to 003 to their previous settings, or
adjust these SPs until the background is acceptable.
B132R130.WMF
B132R141.WMF
[A]
[B]
[C]
[D]