There is a silver patch on what is called the ibt belt. If you take out the drum cartridge you can see it if you look in at about the 7 o'clock position. You need to take that belt out to clean it however. If your happy you can do that let me know
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E012 occurs if the machine cannot read the patch when trying to calibrate color. The main causes are- 1) dirty patch sensors, located on the right side of the machine when you open the right door, just above the transfer belt-typically a off white colored plastic piece. you would have to slide to the rear and blow (3) holes out with canned air. 2) ripped belt- would have to be replaced. 3) fatigued developer causing patch to be read incorrectly. 4) faulty motor on Image transfer Unit.
Whats going on from the sound of it is something stopping moving the scanner up and down OR your scanner cant find its referance point. These dont normally bust a gear but do get dusty
You need to look at the scanner and see what it is doing on power up, is it trying to move as if threw the edge of the machine? (no white reference) so keeps trying and thats the noise the scanner movin a mm then another trying to find home but failing.. usally due to dirty mirrors or blown lamp..
Either way I'd watch a few times,... y0u know the lamp under the lid that moves up and down;0..
Yuor HP should turn on lamp and shine it in the inside edge of the machines copy glass near after power up
You can manual move it with power off to the other end and then after removing your hand plug it in and turn it on and see what the scanner does, I bet it moves fine untill it get near home then starts dancin untill it gives up throwin your error (aka dirty mirrors, just use clean lint free soft somethin, no chemicals just good clean of mirrors. or somethings stopping the carriage movin.
Let us know how you go.. Cheers
The Fix... if Im guessing right that is..... is to remove the Torx screws that HP use (need a a torx driver) that hold on the glass, it needs to come out so you can clean the scanner mirrors reflector and lamp (DANGER 240v live UNPLUG;) and ensure the systemt runs well up and down the scan rail, i think you have to fight to remove the plastic cover from the operations panel too,and on some the Doc feeder has to come off, but on yours I think its the op panel to go so you can get to a screw or something.
Error code E 020 0181 means that the patch sensor has turned bad or is dirty, to access this try removing eac dev unit and gently unscrew each top so that the patch sensor window is visible. Also, check whether the toner hopper is overfull, it happens sometimes that the toner motor worm gear splits as a result of the hopper becoming packed tight. This may cause the worm gear to split and break if the hopper is 1/2 full or less. You may need to replace toner motor, part number (FH7-1762-030). If the toner motor is fine, then check whether the web solenoid is activating. Clean the web solenoid and ensure free action. This would clear error E020. If the error still not disappears then make sure that the DC controller is fine and the connections from the controller are fine.
This error is caused by either a dirty scanner mirror or a dirty scanner glass. We have a step by step guide to dis-assembly and cleaning to correct this problem posted on our web site at: www.ccl-la.com Click on the printer repair page and the the HP link. The fix should take about 30 minutes to do but you should be right back printing when you finish.
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The likely cause is either dirty optics inside the projector or some of the special mirrors inside the optics are burned. If the projector was used a lot then the special mirrors are probably burned. If it's just dust on the optics the unit could be opened and cleaned but you might have to take it in to a repair place to have that done.
Either, you have a dirty contact sensor glass (and I hope that is the case) or your contact sensor has a faulty section. The contact sensor is basically the method which your machine uses to scan documents. Even machines with a lamp and mirrors have a slip glass that can get dirty as well as mirrors. Lift up the doc feeder to reveal the glass strip that the document feeds across, you may notice it light up when you lift the cover up or touch the document sensor arm. Hopefully, there is dirt (usually tippex or white out) stuck on the glass in that particular area. Use a alcohol cleaner to remove those stubborn types of dirt and in future let the tippex or white out dry before scanning. It may even be the gum from a post it pad which is harder to see as you look into the feeder but just clean that glass well and hope that you don't need a new contact sensor. Maybe there's paper stuck there.
The white plastic gear that moves the laser must make
contact with the "motor". A bad contact here can cause disk read
errors. Sometimes it looks Ok, but you may need to remove the lens and
bend the white gear for good contact.
The two rails on
which the lens move must be very slippery - which can be lubricated
with cooking or motor oil. Usually the holes where the rail is (on the
right side of the lens) are dirty or you have to bore then out
slightly, making the holes bigger.
The lens uses little
torx screw (black) that move the lens up and down on the rail. Usually
the lens is too high and requires adjustment.
lens off these 2 rails and take the black plastic cover off. Turn the
lense upside-down and you'll find there are 2 screws (silver, phillips
or torx) that you have to remove to take the upper little lens off.
you'll see a larger lens that is usually very dirty (this lens is a
mirror to light). If that's dirty, it will give a disk read error.
You'll have to take the little electric board off that you see on the
other side of the big lens-mirror. It's probably dirty too, so clean
it. Alcohol should work OK for this task.
The lens bottom has 2 + 2 screws. You move the upper "little" lens up-down-left-right (this may require a special screwdriver)
The motor "rail" that moves the lens must be very clean and oiled and the 2 rails too.