Question about Canon CanoScan LiDE200 Flatbed Scanner

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Cannot communicate with scanner on MAC

I used the scanner at 9 AM, then had to run an errand. I shut down, left my Mac PowerPC G5 running OS X 10.5.8, returned 1 hr. later, rebooted and went back to work. But this time I got the "Cannot communicate with scanner" prompt. I get the prompt often but can usually re-establish contact by disconnecting the USB cable, waiting 60 sec., reconnecting, and re-clicking SCAN. But this time... the same prompt. I used a different cable but still the same prompt. Did it die on me?!!!

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 97 Answers

SOURCE: Scanner won't communicate with my Mac

Uninstall the software with scanner unplug from your MAC. Install the software with the scanner disconnected, then connect it b4 the first use of the software.

Posted on Mar 31, 2007

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  • 111 Answers

SOURCE: Canon CanoScan LiDE 60 not recognized by iMac or Mac Powerbook Laptop

Is the scanner detected in Apple System profiler? If so, what applications have you tried to access the scanner from?

Posted on Jul 09, 2008

SOURCE: canoscan 9950F won't scan, says scanner locked, but it isn't

I was surprised by the same problem this morning. First time I've had a problem with in years. Checked the lock... it was already unlocked. I solved the problem by unhooking the USB cable from the hub, restarting my Mac (seems to be the key), replugging the cable and restarting the scanner. Worked like a charm. Hope it works for you!

Posted on Apr 11, 2009

trisha8765
  • 120 Answers

SOURCE: Every once in a while (after 10 or so scans) the

unplug the connections and power supply for a minute or so and plug back in. Make sure you have the latest driver as well.

Posted on Dec 27, 2009

  • 2 Answers

SOURCE: Canon LIDE 500F scanner does not scan - returns error message about releasing lock switch, detaching interface cable and reconnecting

I had the exact same problem with another scanner (LiDE 80) after years of use. It stopped being able to calibrate itself so I couldn't use it on computers where it had never been installed on before (since on freshly installed computers, the driver requires calibration to be carried out at least once).

Hopefully my solution will work on the 500F, albeit with some modifications you'll have to figure out yourself. :P

What I did was open it up, the two strips of plastic to the left and right of the platen can be used to remove the glass surface:
1. release the oval catch at the front of each strip by prying them upwards.
2. slide the glass towards the front of the scanner a bit till a gap appears between the end of each strip and the back of the scanner.
3. pry a bit of the back of both strips upwards and keep them away from the glass so they won't stopped by the back of the scanner.
4. slide the glass all the way to the back, you should be able to remove the glass since the two plastic strips aren't blocked anymore.

The reason the scanner fails to calibrate is because it tries looking for the black/white strip hidden between the plastic case and glass panel at the front but fails. There are three possible reasons:

1. Dirty glass panel/damaged black/white strip
2. Covered/dirty CIS module
3. Loose drive belt

Mine was a combination of the first three. A little washing and thorough drying of the glass panel and black/white strip and careful wiping of the imaging element and led strips (the black bar is the imaging element and the white bar is the led strips) fixed the problem.

I didn't have a loose drive belt, so I didn't look into fixing that, but I see a spring loaded catch holding the drive belt tension; if you have a loose belt, it may be worth it looking into that.

A tip of advice: If somehow, after reassembling your scanner after tinkering with it it still refuses to calibrate, you can do a dirty workaround by doing the calibration with the scanner disassembled and placing the black/white strip manually above the CIS module at the front, making sure to hold it steady. Your images will look a bit muted, but at least it works! (I did this step before I reassembled the scanner just in case it wasn't fixed, but thankfully its working now!)

Posted on Jun 29, 2010

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