unknown

asked Jul 18, 2000 at 5:49pm
Unknown Printer

HPLJ IIP "52 service" scanner motor noise

I also have the "52 service" problem. After I try to send a job to the printer, the printer makes its normal noises, and then the scanner motor makes a whining noise as if it is spinning twice as fast as it should. Of course the paper does not feed. Is this a "normal" failure of the scanner motor? Thanks for your help.

David

I did not mention that when I took the printer apart and removed the scanner motor, it seemed perfectly fine--without any "burn" or "char" marks. I'd heard one usually found a burned-out motor.

: I also have the "52 service" problem. After I try to send a job to the printer, the printer makes its normal noises, and then the scanner motor makes a whining noise as if it is spinning twice as fast as it should. Of course the paper does not feed. Is this a "normal" failure of the scanner motor? Thanks for your help.

: David

by unknown on Jul 18, 2000 at 7:09pm Add comment
Your scanner motor has lost it's sync signal. This is causing it to over rev. If you look at the assembly, you'll see that there is a fiber optic looking at a mirror. That's the end of travel mirror. Each time the scanner rotates one mirror segment, the beam bounce off and goes down to the dc controller which advances the paper 1/300th of an inch. Before the paper feeds the scanner must obtain the proper fixed rotational speed as counted by pulses to the dc controller. If there is any deviation, you'll get the 52 error. To answer your question about the burn, most scanners do have burn evidence. I've changed a lot that look like new. A 52 error is always a bad scanner motor. That's about the only given in laser printer repair.
by moe on Jul 18, 2000 at 7:34pm Add comment
You will not always find a burned out motor. In my experience, you'll find that 50\% will show a good dark spot on the bottom of the PCB. 30\% will show a little sign of heating up, and 20\% will look normal. Yeah, I've run into the problem several times where the scanner motor sounds like it's running a 1000 miles an hour. Most definately a bad scanner motor though.
by Raymond on Jul 18, 2000 at 7:38pm Add comment