Ricoh D124-17 Service Manual page 550

4. Replacement and Adjustment
SP
4101-1
4008-1
Step 2: Main Scan Magnification
1. Make a 1:1 copy of the A0 SEF Magnification Chart with plain roll paper.
• You can use a different test chart but only if it has lines 1000 mm long in the sub-scan
direction and 700 mm long in the main-scan direction.
2. Measure the length and width of the image on the original and the copy.
3. If the measurements are not within "Standard", adjust these SPs in the order shown in the table
below.
SP
SP4101-2
SP4101-3
SP4101-4
SP4101-5
SP4101-6
SP4101-7
SP4101-8
Step 3: Copy/Print Sub Scan Magnification
1. Make a 1:1 copy of the A0 SEF Magnification Chart with translucent paper.
• You can use a different test chart but only if it has lines 1000 mm long in the sub-scan
direction and 700 mm long in the main-scan direction.
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On each grid test pattern, measure the width from block 1 to block 200 (200
blocks) then average the three measurements. The width must be 812.8 mm. If the
average measured width is not 812.8 mm, adjust this SP until the width is 812.8 mm.
On each grid test pattern, measure the length from block 21 to block 265 (245
blocks) then average the three measurements. The length must be 996 mm. If the
measured length is not 996 mm, adjust this SP until the length is 996 mm.
Paper Type
Normal Recycled
IJ Normal
Translucent
Coated (CAD)
Coated
Matte Film
Special
Comments
Standard
Less than ±0.5