I have used this unit only as a copier. It was never connected to a computer in its entire life (bought brand new from Staples less than a year and a half ago). Where are the buttons you mentioned in your solution? "P, interupt, clear, interupt". Are they on the unit or are you talking about buttons on the compter keyboard or something on the monitor screen that you can click on IF the unit is connected to a computer?
Finally, how do you change the "fuser unit"? What is it? Is it same as the drum? If not, can it be done by the owner (me) or does it require a service person? Where can you buy a new fuser unit (if it's not the drum)?
Ola galera tenho uma maquina de xerox sharp al1642cs ela esta dando um erro h4 e eu não sei oque causou isso se alguem tiver uma solução e pode me ajuda agradesso po me manda um emeil email@example.com
`the fuser is not the drum it the heating assembly from where the copy finally comes out of the machine . the buttons you must press in sequence are these: # , interrupt, C, interrupt then enter the no. 14 , then presss the green start button.
all these buttons are on the machine keyboard nothing to do with the computer.
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The H4 code indicates the fuser may have blown the thermistor. It also could be a false error code. Try this series to clear the error and if it returns, then you'll know for sure the fuser is the culprit.
To reset press the following buttons:
Usually a flase code on these models. Try clearing by pressing "C" then far left key (Exposure Mode) then "C" then far left again. Must be pressed quickly and if done correctly display will go blank. Then key in 14 as if making 14 copies. Then press Print.
Short Version: C, far left, C, far left, 14, print
If code returns then you have a fusing unit problem but 9 times out of 10 this is just a false code.
Here is what worked for me.
You need to alternate pressing the clear button then one of the auto buttons until the display lights turn off.
First press the clear button (red letter “C” on the unit) then the auto button. (below the word auto there are 3 buttons. Press the one on the far left that has no other markings on it. This will only take 2 or 3 times back and forth.
When the display is blank enter the number 14 (like you were making 14 copies of something) then press the Green (start?) button. Let the copier warm up about 30 seconds and try making a copy.
It worked for me. Still having trouble call Sharp USA630-378-3590 or Canada 905-568-7140. They were quick and helpful