Printer and Photocopier Troubleshooting and Repair Collection : HP DeskJet 692C - Random lockups        
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HP DeskJet 692C - Random lockups

(From: Jess Askey (jess@magenta.com).)

I did a search when BOTH of my HP692C DeskJet printers started getting flaky. I didn't find much except for a post mentioning that cleaning the small plastic 'barcode' may solve most problems. While this is exactly what HP customer service suggested as well, it didn't solve my problems.

What the printers were doing, were randomly locking up. They also started making a 'knock' sound while they were printing. But, the 'knock' sound was more prevalent than the actual 'locking up' problems. But they would still lock up more than twice a day.

What I found was happening was that the stepper motor belt was skipping a tooth when the print head was changing directions. There is a black plastic tensioner arm on the left side of the printer that holds the belt tight and this was getting yanked in enough to let the stepper belt have some slack.

What I did to fix this was to take the spring out from behind the black tensioner arm and stretch it out to put more tension onto the stepper motor belt.

Both of these printers have had heavy use, they both are just over 1 year old right now too. I only moderately stretched the first spring and it still made the 'clicking' noise every so often. On the second one, I probably stretched it about 1/2" to 3/4" in it's fully relaxed position, but I think when putting it back into place it probably bent back a small amount. This worked well, the belt did not feel overly tight and I have not had ANY problems whatsoever. :-)