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Hi
I found this explanation of your error, although my understanding of it is not entirely clear. Code: C6400 Description: Zero-cross signal error
Interrupt of the zero-cross signal does not occur more than 1 s. Causes: Poor contact in the connector terminals.
Defective power source PWB.
Defective engine PWB
You can find this here: Error Codes Kyocera Mita TASKalfa 221 Code C6400
and also by changing the drop down menus along the top of the page you can view other errors for your machine and for other models and makes. You can also use the link to get a Service Manual for your machine.
Hope this is helpful, if so would you please register that with Fixya
Cheers
If the code is C6400, then just follow the procedure showing in the images below.
If the code is C6000, then you have to remove the fuser unit and check the thermistor, the thermal cut out and the heater lamp. If are able to fix the problem-damage, then follow the procedure below to reset the service call.
Error C6400 appears in Kyocera FS118 when Zero crossing signal problem occurs i.e when the engine PWB doesnt detect the zero crossing signal. This can occur due to --
#1 Poor contact in the connector terminals. #2 Defective power supply PWB. #3 Defective engine PWB.
To reset it from Mainatince mode turn the power switch off and open the front cover. Now, turn the power switch on and press the system menu/counter key to enter the maintenance mode.
1. Press the enter key. A selection item appears. 2. Select Execute using the up/down cursor keys. 3. Press the enter key. The fusing problem data is initialized. (Four service calls, namely C6000, C6020, C6050, and C6400 are reset.) 4. After this is complete press the back key. The indication for selecting a maintenance item No. appears.
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