Tips to Hush a Noisy Printer Gear
by Steve Geishirt · Parts Now! · November 1, 2008 - page(s): 50-53
A noisy printer is never a welcome officemate. Our tech support team heard about a loud, buzzing noise inside the LJ2400 printer. While studying this noise issue and trying to recreate it, we discovered an interesting set of drive gears that helped us ultimately figure out the solution. The office should get a little quieter once you read our tips.Techs describe the grinding noise as coming from the delivery drive assembly and the duplex and gearing system. These two drives and their motors do three things:
1. Drive the fuser at normal speed via the main motor2. Drive the fuser and delivery via the fuser motor at a higher speed
3. Drive the delivery in reverse and engage the fuser when in duplex mode
What's interesting is the fuser is being driven by two motors, which can run at two different speeds and in opposite directions. Let's take a closer look using Figure 1. Note the fuser drive gear or LPR (lower pressure roller) gear is driven by two sets of gears, both A and C. Gear C is driven by the main drive motor, which also turns the pickup, registration, toner cartridge, transfer and duplex sections in the front. The fuser is driven by the main drive motor and also by the fuser motor. You would think they would fight each other, but they don’t. They’re designed to work this way. It makes more sense when we look at the running process.
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