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DocuPrint N4525 Network Laser Printer - Service Guide
3
IMAGE TRANSFER INSPECTION
1. Remove the Rear Cover (RRP 1-5).
2. Generate a Blank Test Print and switch OFF printer
power halfway through the print cycle.
3. Open the Left Upper Door.
4. Open the Drum Shutter.
5. Hand rotate (counter clockwise) the Drum Drive Motor
flywheel to advance the Drum far enough so you can
see the developed image area on the Drum before it
reached Transfer.
Before Transfer was the drum clean and
without noticeable background toner, but there
was background visible on the paper after
Transfer?
Replace the
Bias Transfer
Roller
Assembly
Go to step 4
4
FUSER INSPECTION
1. Generate another Blank Test Print and switch OFF
printer power when the print is halfway through the
Fuser.
2. Open the Left Upper Door.
3. Examine the paper before it enters the Fuser and after
it exits the Fuser.
Is paper clean before it enters the Fuser, but
there is background on the paper when it exits
the Fuser?
Replace the
Fuser
Assembly
Go to step 5
5
The following printer components and areas are
associated with this specific problem. One or more of
these components or areas may have failed partially or
completely. If you cannot isolate this problem using the
steps in this Fault Isolation Procedure, replace each
component or troubleshoot each area listed below, one at
a time, until you isolate and solve the problem.
Replace the paper with another brand of paper
High Voltage Power Supply Assembly (RRP
Print Engine Controller Board (RRP 1-72)
Input/Output Board (RRP 1-70).
Table 1-94 Background (cont'd.)
Step
Actions and Questions
Yes
No
Содержание DocuPrint N4525
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Страница 290: ...1 268 DocuPrint N4525 Network Laser Printer Service Guide PL 1 2 Front Cover Fig 1 98 Font Cover S4525 158 ...
Страница 296: ...1 274 DocuPrint N4525 Network Laser Printer Service Guide PL 2 2 Tray Unit End Guide Fig 1 101 Tray Unit End Guide ...
Страница 328: ...1 306 DocuPrint N4525 Network Laser Printer Service Guide PL 6 1 Registration Fig 1 117 Registration S4525 177 ...
Страница 338: ...1 316 DocuPrint N4525 Network Laser Printer Service Guide PL 8 1 Fuser Assembly Fig 1 122 Fuser Assembly S4525 182 ...
Страница 352: ...1 330 DocuPrint N4525 Network Laser Printer Service Guide PL 11 1 Power Unit Fig 1 129 Power Unit S4525 189 ...
Страница 358: ...1 336 DocuPrint N4525 Network Laser Printer Service Guide PL 11 4 Wiring Harness Fig 1 132 Wiring Harness S4525 192 ...
Страница 369: ...Volume 1 Print Engine P J Connector Locations 1 347 P J Location Map 1 Fig 1 133 P J Location Map 1 S4525 148 ...
Страница 370: ...1 348 DocuPrint N4525 Network Laser Printer Service Guide P J Location Map 2 Fig 1 134 P J Location Map 2 S4525 149 ...
Страница 371: ...Volume 1 Print Engine P J Connector Locations 1 349 P J Location Map 3 Fig 1 135 P J Location Map 3 S4535 150 ai ...
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Страница 373: ...Volume 1 Print Engine P J Connector Locations 1 351 P J Location Map 5 Fig 1 137 P J Location Map 5 S4525 152 ...
Страница 374: ...1 352 DocuPrint N4525 Network Laser Printer Service Guide P J Location Map 6 Fig 1 138 P J Location Map 6 S4525 153A ...
Страница 375: ...Volume 1 Print Engine P J Connector Locations 1 353 P J Location Map 7 Fig 1 139 P J Location Map 7 S4525 154 ...
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Страница 380: ...358 DocuPrint N4525 Network Laser Printer Blank Page ...