Printer intermittantly prints blurry pages ( looks like you are reading thru someone else glasses). tried running cleaning procedures for light streaks and smeared pages. Also replaced maint. kit. 3 days later printer started doing it again.
I had a similar problem. I discovered that the imaging drum was too hot. There is a temperature sensor that rides on the drum surface to monitor the temperature. You can see it if you lift the exit cover on the right side. The sensor is white, and has a thin probe which rides on the drum surface. There's a single screw accessible from the right side which holds it in place. A hole on that side will allow a screwdriver (torx) to access the screw and the little unit can be removed (be patient- it can be done!). Clean the probe with some alcohol and replace it. The problem is caused when the ink on the drum smears because it's too hot. Dirt (wax and oil)under the sensor probe prevents contact with the drum, and makes the printer think the drum is too cold.
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Re: 8400 blurry print
What is happening is that the print head is not moving completely into the proper position and making the image to far away from the drum.
One of 2 things.
1. From the front, if you remove the left side cover. On the lower part of the frame about mid way back, you will see a stainless steel block about 1 inch by 1 inch square. it may be getting some ink in it and not pivoting back and forth smoothly. You can slip off the spring assembly over it, latch it up and to the left, away from the block. remove that block and clean it well.
2. Remove both the right and left side covers, and then the ink cover, then ink loader. The ink loader is just clipped in, and has 2 connectors on it. The second thing that could be happening is the cables to the print head may be hanging up, causing the print head to be out of position.
Between those 2 things, those would be a 95 percent cause of your issue.
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I do not know what kind of copier you have but lines (when you run thru the feeder) are usually caused by something on the glass under the feeder. If you open the top, you should see the big piece of glass and also a piece about an inch or two wide next to the big one. Look closely at the smaller glass for any spots on it. A spot will show up as a line on the copy. You can use windex to clean it.
Are you scanning both black and white and color the same way? The ADF (automatic document feeder) uses a different scanning area than when you place the document on the scanning glass. If you open the scanner cover, look to the left of the main scanner glass to the narrow strip used for the ADF. Make sure this narrow strip is clean -- no ink or white-out or scratches. This can make your copies look dirty or smudged.
Yeah I just read a tip. There seems to be a problem with the wave amp board, I will send you the engineering note. Sometimes though that encoder needs replaced and cleaning is not the total fix. The encoder may need replaced, but I found this also.
I just received this, this morning.
Failed Wave Amp Solution:
Fixed! Did not fix.
Historically blurry print was caused by oil on the drum encoder wheel. This can be caused by the wave amp board. A cracked capacitor on the board causes the wave amp to produce a malformed amplified wave signal to the printhead. This in turn causes the printhead to eject ink at the wrong times, so the prints look blurry.
You can generally distinguish a wave amp problem from an oily drum encoder. The wave amp problem will usually be an infant failure. The printer will start producing blurry prints soon after it is installed and running. With a failed wave amp all prints will be blurry with no improvement. The drum encoder, on the other hand, may produce good prints and then bad prints and then good prints. Blurriness changes depending on how the oil is interfering with the encoder.
Received fax is unreadable or blurry Please go through the checklist below to see if the suggested action(s) can resolve the issue.
* Make sure the copy function is working well. * Print a Clean nozzle page from the Maintenance menu. If the printout has unexpected white or color horizontal streaks or missing portions, print the Clean nozzle page again. If you are still experiencing streaks or mission portions, you may need to replace your cartridge(s). * The cartridges may need to be aligned. * You may need to ask the sender to increase their fax quality.
Sent fax is unreadable or blurry.
1. If the receiving party indicates that the fax output is unreadable or blurry, you may want to try increasing the fax quality. 2. Check the scanner glass for excess amounts of smudges and/or fingerprints. If the scanner glass needs cleaning, moisten a clean, lint-free cloth and gently wipe the scanner glass. Make sure the scanner glass is dry before scanning the next document.