Question about Sharp AR-M237 Copier

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Service Code of H4-01

I have this service code - H4-01 on my Sharp AR 337. Can you tell me how to clear it?
Thank you.

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H2-01 Fusing Temp. to low
Use DIAG (SIM5-2) to checkthe heater lamp
Blinking operation.
If the heater lamp blinksnormally:
Check the thermistor and its harness.
Check thethermistor input circuit in the
control PWB.
If the heater lampdoes not light:
Check for heater lamp disconnection and
thermostatdisconnection.
Check the interlock switch.
Check the AC PWB andthe lamp control
circuit in the control PWB.
Use DIAG (SIM14) to cancel the trouble.

H2-0 Fusing unit temperature error
H4-0 The fusing unit doesn't heat up.
***ALWAYS DISCONNECT POWER WHEN WORKINGON MACHINE***
You have to reset fuser errors with simulation 14.Push P * C * then 14 then Start (the button you use to make copies)and it should reset the code. If not then replace the fuser.
SM5-1 should turn the lamp on. If lamp blinks on and off it is thethermistor, if it does not it is the lamp, but check the contacts onthe lamp/fuser -- they have been known to erode.
Also check thermal fuse, if defectivereplace.

Posted on Jan 28, 2009

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I have a sharp AR-337 copier, On the dispaly it reads: CALL FOR SERVICE. CODE:H4-00


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