Question about Sharp AR-M620N Copier
HOW MANY TURNS DO THE FUSER UNIT SCREWS TAKE ON A SHARP AR M620N
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Posted on Jan 02, 2017
SOURCE: Sharp AR-M237 Error Code H4-21
-H4-21 means:Sub heater lamp abnormally low temperature detection. The setup temperature (about –25°C: Sim 43-1-1) is not reached within the specified time (about 32sec) from turning on the power ON SW. (When the temperature falls below 140°C in the standby mode.)
Sub heater thermistor defect
Sub heater lamp failure
Sub thermostat failure
Control PWB failure
-Check the sub heater lamp blinking with SIM 5-2-2.
When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit.
When the lamp does not light: Check for disconnection of the heater lamp and thermostat. Check the interlock switch. Check the power PWB and the MCU PWB lamp control circuit.
Clear the display of self-diagnostics with SIM 14.
The H4 errors will not reset by themselves. You must enter service mode to reset this error even if the problem has been repaired. The reset process is outlined below (DO NOT USE ANY OTHER FUNCTIONS IN SERVICE MODE):
Press the following sequence: "#/P" "*" "C" "*"
Type in 1 4
hit 1 for yes
Unit should power off and the restart.
If the error code recurrs ther are other problems.
Posted on Jun 06, 2008
depends on what is the problem with it? if it's only toner on it, let it cool and clean w soap and water rag, then wipe clean. I suspect that it is most likely scratched and the coating on the fuser is missing, it should be a shiny smooth surface.
Posted on Nov 19, 2008
SOURCE: H4-00 error on Sharp AR-168D
the code needs to be reset even if you replace the fuser.
Press clear, press *, press #, press * your display should go blank press 14 then press print,
I'm doing this from long term memory I may have the # and * symbols swapped
Posted on Apr 09, 2009
must enter into simulation mode. press"P""*"Clear""*" then press"14 " then press "start" then press"0" then "start" again. if 14 doesn't work substitute 15,16 or 17.
Posted on Nov 04, 2009
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