Xerox DocuPrint P1202 Service Manual page 153

Defect Definitions
VERTICAL DELETIONS: There
are areas of the image that are
extremely light or missing
entirely. These missing areas
form wide bands that run
vertically along the page in the
direction of paper movement.
SPOT DELETIONS: Solid areas
are marked with irregular white
areas.
LIGHT PRINTS:
BLANK PRINTS: Prints with
no visible image.
EXTRANEOUS MARKS:
Horizontal or vertical bands, or
other marks that are print defects
caused by bad or incorrect font
data, print drivers, electrical
noise or other causes not directly
related to the
electrophotographic process.
Xerox DocuPrint P1202 Service Manual
Possible Causes
1. Print Cartridge.
2. Laser Assembly.
3. Fuser Assembly.
4. Transfer Roller.
1. Print Cartridge.
2. Transfer Roller.
3. Damp Paper.
1. Remote Control Panel (RCP)
settings.
2. Print Cartridge not installed
correctly.
3. Incorrect high voltage output.
4. Low toner in cartridge.
1. Seal tape not removed from
Print Cartridge.
2. Defective ground on Print
Cartridge.
3. Controller PWB.
4. Incorrect high voltage output.
5. Defective LASER.
6. Transfer Roller pressure
7. Paper
1. Defective font download.
2. Loose / defective cables,
cables out of specification (too
long, etc.).
3. Electromagnetic interference.
4. Controller PWB.
5. Engine PWB.
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Solutions
1. Replace the Print Cartridge (PL 4).
2. Inspect the LSU (LASER) beam path for
contamination. Clean as necessary.
3. Inspect fuser rolls for damage and replace as
necessary.
4. Inspect Transfer Roller spring tension and
bearings. Remove the Transfer Roller and clean
(dust off). Replace Transfer Roller if necessary
(PL 2).
1. Deletions repeat every 94.3 mm (3.7 in.).
Replace Print Cartridge.
2. Remove the Transfer Roller and clean (dust off).
If deletion repeats every 47.1 mm (1.9 in.),
replace the Transfer Roller (PL 2).
3. Replace paper.
1. Verify the RCP print quality settings.
2. Re-install the Print Cartridge.
3. Verify that all high voltage outputs are to
specification (refer to section 5, DCU operation).
4. Remove the Print Cartridge and shake to
redistribute toner. Replace Print Cartridge if
necessary (PL 4).
1. Inspect cartridge for removal of seal tape.
2. Verify Print Cartridge ground. Check continuity
between cartridge contact and the Controller
PWB metal cover. Ensure that the Print
Cartridge ground contact is clean and
undamaged.
3. Using the DCU, print a DCU test print. If the test
print is OK, replace the Controller PWB.
4. Verify that all high voltage outputs are to
specification (refer to section 5, DCU operation).
5. Using the DCU, verify the Laser operation.
Replace the LSU (LASER) Assembly (PL 4) if
necessary.
6. Inspect Transfer Roller spring tension and
bearings. Remove the Transfer Roller and clean
(dust off). Replace Transfer Roller if necessary
(PL 2).
7. Install fresh paper in the Multipurpose Feeder.
1. Customer may have recently changed/modified
host software or drivers. Reconfigure if
necessary.
2. Inspect cable connections for proper installation
and for damage. Parallel cable must be a good
quality and comply with the IEEE 1284 bi-
directional specification.
3. Relocate printer to another location or to another
power outlet.
4. Replace the Controller PWB (PL 7).
5. Replace the Engine PWB (PL 7).
Repair Analysis Procedures (RAP)