Question about Sharp AR-168D Black and White Copier
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
[#] 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
Control PWB abnormality
Use TC 5-02 to check the heater lamp blinking
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the control
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.
Posted on Feb 05, 2009
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Posted on Jan 02, 2017
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