I have a Sharp AR-168D with the H4-00 error message on. I have found the service manual, and know about the test command mode, but can't get the machine to go into tc mode. I have tried turning it on while holding down the start button, and the clear button, and various combos of buttons, but have had NO success. I have also just keyed in the # *C* sequence repeatedly, but the machine just beeps at me and continues to display the H4-00 message. Can anyone help me with this procedure? My other question is, if I can get the machine to go into test command mode, what is the [10KEY]? On other machines, it is the key that adds 10 copies at a time to the number you want; however, this machine doesn't have one. I'm confused!
To enter the serviceman test command mode, press the keys as follows: [#] key → [*] key → [C] key → [*] key To cancel the test command mode, press the [CA] key.
H4 00 Content Heat roller low temperature detection Detail The fusing temperature does not reach 185°C within 27 sec of turning on the power, or the fusing temperature keeps at 140°C. Cause Thermistor abnormality Heater lamp abnormality Thermostat abnormality Control PWB abnormality Check and remedy Use TC 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 TC 14 to clear the self diagnostic display.
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H2 00 [Content] Thermistor open [Detail] The thermistor is open. The fusing unit is not installed. Cause Thermistor abnormality Control PWB abnormality Fusing section connector disconnection The fusing unit is not installed. [Check and remedy] Check the harness and the connector between the thermistor and the PWB. Use TC 14 to clear the self diagnostic display.
To enter the serviceman test command mode, press the keys as follows: [#] key → [*] key → [C] key → [*] key Enter 14 Start to clear the code.
H4 indicates a heating problem in the fuser. The roller never reached a specific temp. Make sure the fuser is free of any left over paper pieces (maybe from a paper jam). Check to make sure its clean.
Try reseting the the error in service mode.
To enter the test command mode, press the keys as
follows one after the other :
[#] key [*] key [C] key [*] key then enter 14 and press start/copy key. this clear error counter. make sure to restart copier afterwards.
Hello: All I have access to is the
Toshiba Version of your machine but I think maintenance mode is the same. This is the excerpt from the
relativeinfo in the service manual. Example:
Basically you press# * c * ( to get into maint. mode Press 20 Start 01 start (then the
maintenance counter will clear) I hope you can figure it out The drum and dev counts are below To enter the serviceman test
command mode, press the keys as follows: [#] key → [*] key → [C] key → [*] key To
cancel the test command mode, press the [CA] key. [10KEY]:(number pad) Entry of MAIN CODE/SUB
CODE Selection of an item Setup of an adjustment value in
case of test commands for adjustment [←/→]: Selection of MAIN CODE/SUB
CODE Selection of an item [OK (ENTER)/START]: Settlement <In case of test commands for
print> [OK (ENTER)]: Settlement (Without
print) [START]: Settlement/Print [C]: (Interrupting operation
check) Returns to the upper hierarchy. In case of test command of
operation check, terminates the operations. [CA]: Exits from the test command
mode. For a
test command of adjustment, the display returns to the initial display (00-00). 20 01
Maintenance counter clear (M-CNT CLR.) 24 06 Developer counter clear
(DVLP CLR.) 2407 Drum counter clear (DRUM CLR.)