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Service Guide DOC-IT3000/4000
Chapter 4 Failure & Repair Analysis
RAP#9 - Dark Background Density
START.
The following procedure is for troubleshooting printed images prepared on the PC.
Clean the transfer wire.
Is the problem resolved?
YES End of procedure.
NO Has the image drum been exposed to external light?
YES Test the unit after 30 minutes. This will allow the drum surface to recover
its photoconductive properties.
Is the problem resolved?
YES End of procedure.
NO Go to A.
NO Replace the fuser cleaner pad.
Is the problem resolved?
YES End of procedure.
NO Go to A.
A
Replace these possible defective assemblies in the listed order. Test the operation of the unit
between each item.
1. Image drum cartridge
2. High voltage power supply
3. Engine control board
Is the problem resolved?
YES End of procedure.
NO Contact Technical Support.
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Summary of Contents for DOC-IT3000
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