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HOW TO REDUCE CHANCES OF H4 CODE IN SHARP COPIERS

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.

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sharpo m160 is error code H4


Hi Zihaalsan, the link below is a user manual showing error H4 and solving the problem... Good luck......CHEERS..
http://olsonbros.com/sharp/support/pdf_trbl/trbl-arm160_m205.pdf
H4. Heat roller low temperature detection...
When the fusing temperature is lower than 150C° after 55sec from the start of warming up. When the warming up complete temperature is not reached in 30sec from reaching 150C°. When the fusing temperature is lower than 100C° after 20sec from ready start. When the fusing temperature is lower than 145C° when printing."
Cause Thermistor abnormality Heater lamp abnormality Thermostat abnormality Control PWB abnormality
Check and remedy Use SIM 5-02 to check the heater lamp blinking operation. When the lamp blinks normally. Check the thermistor and its harness. Check the thermistor input circuit on the control PWB. When the lamp does not light up. Check for disconnection of the heater lamp and the thermostat. Check the interlock switch. Check the power PWB and the lamp control circuit on the MCU PWB. Use SIM 14 to clear the self diagnostic display.

Mar 31, 2016 | Office Equipment & Supplies

1 Answer

sharp m165 error h4-00 give solution


Heat roller abnormally low temperature

Check blinking of the heater lamp
with SIM 5-2.
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 heater lamp
disconnection or thermostat
disconnection.
Check the interlock switch.
Check the power supply PWB
and MCU PWB lamp control
circuit.
Clear the trouble with SIM 14.

May 12, 2014 | Sharp AR-BC260 Color Copier

1 Answer

h4 error code


H4 00 Content Heat roller low temperature detection
Detail When the fusing temperature is lower than
150C° after 55sec from the start of warming
up.
When the warming up complete temperature is
not reached in 30sec from reaching 150C°.
When the fusing temperature is lower than
100C° after 20sec from ready start.
When the fusing temperature is lower than
145C° when printing."
Cause Thermistor abnormality
Heater lamp abnormality
Thermostat abnormality
Control PWB abnormality
Check
and
remedy
Use SIM 5-02 to check the heater lamp blinking
operation.
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the control
PWB.
When the lamp does not light up.
Check for disconnection of the heater lamp and
the thermostat. Check the interlock switch.
Check the power PWB and the lamp control
circuit on the MCU PWB.
Use SIM 14 to clear the self diagnostic display.

May 04, 2010 | Sharp AL-1641CS Color Copier

2 Answers

H4-00


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.

Feb 27, 2009 | Sharp AR-5316 Advanced Digital Imager...

2 Answers

I want a solution for a Sharp AR - 287 Digital Image problem


H4 for an error code on all Sharps indicates that the fusing temperature isn't correct. It needs to have a new thermistor installed or the heating lamps need to be replaced.

Oct 21, 2008 | Sharp AR-235 Copier

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