Epson 4490 - repair tip

Hi. My scanner is kind of broken.

I recorded the sound, it is to be listen on here.

It's two and a half year old, and I have during that time scanned about 200 images with it. I've always treaten it good, so it should not be defect.

What happens is just after turning poweer on, it makes a terrible sound. That's because the motor inside probably doesn't know that the "moving part" (doesn't know what to call it) is already at the end position.

But after some seconds, I can still use the scanner. I call the support and he told me to pull the power cable out for half an hour - that would reset the software. But it didn't help. It's a good scanner that provide both scan results, good software and is pretty fast - and I rather spend time to repair it yhan just buy a new one.

So now I guess the problem might be due a hardware failure. What I plan now is to do the repair work myself, but I suspect that there is either a mechanical contact or a optocoupler that is defect and need to be replaced. That is I probably need the service manual to get part numbers so I can replace any damaged component inside, and also to know where I shall measure to prove what part is defect.

But - if any other has any experience about repairing scanners - I would be very thanksful for any tip.