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if fixing the fuse unit by checking the thermostat and thermos-fuse then you reset the software by entering simlations by pressing # interpret cancel interpret press 14 start button
H4
means; Heat roller low temperature detection. This is an error in your
fuser and you will likely need to get a service technician to take a
look at your copier.
The heater lamp isn't coming on either because of blown heater lamp or thermostat reset itself . Clean the thermistor and replace any of the above defective part.Then press C, 0, 0, C and press 14 press READY.
h4 code in sharp .that s fuser temperature very high .just reset it.press clear key,auto photo key,clear,auto photo key.copier goes dead .when it goes dead just press 14 then start key.copier will bi ready after some time.it works.by mian jee
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