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Laser synchronization error
The main scan synchronization
detector board cannot detect the laser
synchronization signal for more than 5
consecutive 100 ms intervals
Remove PCU, remove development unit, remove cover (2 plastic C-clips) remove filter, remove development roller (2 shoulder bolts). Clean roller and empty all developer. Pour in new developer, re-assemble unit. Reinstall drum and Development unit. Place a small piece of paper between the PCU and toner entrance hole to prevent used toner from entering dev. unit during calibration. Perform SP2-801. Remove paper form dev. unit
You're talking about two really old machines, the 450 from 1998 & the 7025 from 2000. Both are about the same class, but I'd give the edge to Ricoh since it was also sold under a number of other brands & replacement parts are readily available. Hope this helps...
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