Goodday sir,my sharp digital copier/printer was on when i was using generator, when public power supply came back I changed from my generator to it.Reaching my copier it was blinking H&4 continuously uptill now. please help me out thanks Genger from Abuja Nigeria
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Check blinking of the heater lamp
with SIM 5-2.
When the lamp blinks normally:
Check the thermistor and the
Check the MCU PWB thermistor
When the lamp does not light:
Check for heater lamp
disconnection or thermostat
Check the interlock switch.
Check the power supply PWB
and MCU PWB lamp control
Clear the trouble with SIM 14.
The code H4 is common to all Sharp copiers. This occurs due to abnormal low temperature being sensed by thermistor. This means that the heater lamp which generates heat around the fuser rollers is either not working or producing very low heat. Low heat generated comes from low power output in the mains so, when you suspect low voltage, always switch off your copier and wait for normalcy. You can see from dim bulbs and know that's low voltage.
fixing assembly related. check:-
2. fuser lamp.
3. If fixing assembly is receiving PD from power supply if not change power supply.
4. reset the machine using SIM 14 (pressing in quick sucession 'clear' 'Auto' 'clear' then 14 and copy button.
what is the supply voltage in ur area is it 220v or 110v.Most european machines are 110v and this creates problem with the fusing section.H4 code is from fusing unit .U can check the machine ratings by looking at the back or side cover where they are mentioned.
is it i ok then check for broken thermistor,heater
H4-00 on Sharp means that the temperature inside the printer is too low. That is usually the fuser lamp, and rarely the temp sensor. When this happen you need to have the fuser unit replaced, if that does not fix the problem the technician will replace the temperature sensor.
Dear sir; H-4 Means heat unit problem, try to reset first,follow the steps as below;
1, press "#", " interupt", "clear", "interupt".
2, enter 14.press start.
3, power off and back on again.
If can not be reset then you have go to check the heater lamp, thermos fuse or thermister,
If you need more help let me know I'm alway here. Good luck, don't forget give me a good rating.
HAVE A HAPPY HOLIDAY !!!