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Erica407Den

Best Practices for Servicing Older Laser Printers (Common Issues & Tips)?

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Hello everyone,

I'm a technician who frequently encounters older laser printers (e.g., models from the early to mid-2000s like HP LaserJet 4000 series, Canon LBP series, or similar-era Lexmark/Brother models). While I have service manuals, I'm looking to gather some real-world best practices and common troubleshooting tips from the collective experience here.

Specifically, I'm interested in:

What are the most common points of failure or wear-and-tear you've observed in these older units (e.g., fuser assemblies, pickup rollers, formatter boards, etc.)?
Are there any 'preventative maintenance' tasks or checks that are often overlooked but can significantly extend the life of these printers?
Any 'quirks' or unusual issues specific to certain popular older models that you've learned to anticipate?
Recommendations for reliable sources for replacement parts (especially for components that are becoming harder to find).
Any tips for cleaning or rejuvenating components that aren't typically replaced?
My goal is to improve my efficiency in diagnosing and repairing these machines, as many clients still rely on them.

Thanks in advance for any insights or advice you can share! 

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