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  1. #1
    Technician
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    Jan 2010
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    Sharp AR-M 237 Error Code H4-00

    Goodday,
    Please help me with this Sharp AR-M 237 Photocopier which is
    displaying Error code H4-00.
    Thanks in Advance


  2. #2
    Senior Tech 100+ Posts
    Sharp AR-M 237 Error Code H4-00


    Join Date
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    Quote Originally Posted by vonhetcchtel View Post
    Goodday,
    Please help me with this Sharp AR-M 237 Photocopier which is
    displaying Error code H4-00.
    Thanks in Advance
    From the manual:

    H4 00 Content Main heater lamp abnormally low
    temperature detection
    Details The setup temperature (about 90C) is not
    reached within the specified time (about
    17sec) from turning on the power ON SW.
    (When the temperature of main heater
    lamp thermistor falls below 140C in the
    standby mode or printing.)
    Whether temperature of main heater lamp
    thermistor falls below 50C in the pre-heat
    mode.
    Cause Main heater lamp thermistor defect
    Main heater lamp failure
    Main thermostat failure
    Control PWB failure
    Check
    and
    remedy
    Check the heater lamp blinking 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 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.


  3. #3
    OMD-227
    Guest
    Check the main heat lamp. The lamp holder plate was modified a few years back to give extra heat expansion allowance between the lamp & the plate. It was common for the lamp ends to crack due to no heat expansion allowance in the fuser frame.


  4. #4
    Technician
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    Jan 2010
    Location
    Douala
    Posts
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    How can I log onto the diagnostic mode on this copier?

    How can I log onto the diagnostic mode on this copier? in order to run Sim 14
    and the other codes?
    Thanks once more.


  5. #5
    Service Manager 250+ Posts Hemlock's Avatar
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    Dec 2009
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    DC Metro area
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    From the manual -

    Entering the simulation mode
    1) #/P key (program) ON → Asterisk (*) key ON → CLEAR key ON →
    Asterisk (*) key ON → Ready for input of a main code of simulation


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