Xerox DocuColor 1632 Service Manual page 472

ï Original Type - Photo & Text / Halftone
ï Lighter/Darker - Auto Contrast
ï Color Saturation - Normal
ï Variable Color Balance - Normal
ï Sharpness - Normal
2. Place Test Pattern 82E8220 on the platen and 24# Xerox Color Xpressions 11 X 17
(USCO), or 90 GSM Colotech A3 (XL) paper in Tray 1. Make a copy of the test pattern.
3. Follow the directions in Table 3 to determine if the machine registration is within specifica-
tion.
Table 3 Test Pattern Image Data Locations for Geometric Specifications
GEOMETRIC
CHECK PERFORMED
AREA
Magnification Locate the 300mm line running from near LE1 to the trail edge of the 1.8 lp
ladder. Locate the 200mm line running from near LE1 to near LE3. Make a
copy. The measurements should be:.
ï Left to Right.: 300mm 1.8mm
ï Front to Rear: 200mm 1.2mm
Resolution Observing the targets on the test pattern copy at locations R1 through R8, the
line pairs specified below are clearly visible for the magnification value indi-
cated:
ï 70%: 3.0 lp/mm
ï 100% through 400%: 4.3 lp/mm
Lead Edge Measure from the lead edge of the paper to the top of Step 3 on the LE2 Step
Registration Scale. The measurement should be:
ï Trays 1 through 4: 10mm 1.5mm ( 1.9mm for 2nd side of duplex job)
ï Tray 5: 10mm 2.2mm
Side Edge Measure from the side edge of the paper to the top of Step 3 on the SE2 and
Registration SE3 Step Scales. The distance should be within the following tolerance:
ï Trays 1 through 4: 10mm 2.0mm ( 2.4mm for 2nd side of duplex job)
ï Tray 5: 10mm 2.4mm
Lead Edge For skew from front to rear, the distance from the lead edge of the paper to the
Skew targets at LE1 and LE3 are measured. The measurements must match each
other to within the tolerance below.
ï Trays 1 through 4: within 1.5mm ( 2.0mm for 2nd side of duplex job)
ï Tray 5: within 2.0mm
Side Edge For skew from left to right, the distance from the side edge of the paper to the
Skew targets at SE1 and SE4 are measured. They must match each other to within
the tolerance below:
ï Trays 1 through 4: within 3.0mm ( 4.0mm for 2nd side of duplex job)
ï Tray 5: within 4.0mm
Line Density This parameter is measured on the two 0.7G Text Blocks on the test pattern
copy. The machine should reproduce all of the characters shown in the block
on the output copy.
Solid Repro- This specifies the desired standard for reproduction of solid gray images at 1.0
duction K. The 1.0 K blocks on the output copy should reproduce with minimal mottle
or graininess.
Image Quality
Image Quality Specifications
Table 3 Test Pattern Image Data Locations for Geometric Specifications
GEOMETRIC
CHECK PERFORMED
AREA
Low Contrast This specifies the desired standard for reproduction of low density images.
Reproduction The machine should reproduce all of the text in the 0.2 G Text Blocks on the
output copy.
ROS Borders Measure from the lead edge of the paper at LE2, the side edge of the paper at
(Image Loss) SE2 and SE7, and the trail edge at TE4, to the top edge of the step scales in
those locations. The measurements should conform to the following specifica-
tions:
ï Lead Edge 4mm
ï Side Edges 2 mm
ï Trail Edge 2 mm
6/02
3-22
1 mm
1 mm
1 mm
Prelaunch Training/Review
DC1632/2240