I have Kyocera km-2050 it coming error for call for services error code -C6400

https://www.youtube.com/watch?v=swNZN2dri6E

http://www.copytechnet.com/forums/kyocera-mita-copystar/11146-kyocera-km-4050-c6400-error-codes.html

heater problem press10871087 after press 163 reast

press10871087 after press163 reast

check your fuser unit thermistor or thermostat or lamp as the following digita 1087 1087 and put 163

Works with ERROR C6000, C6300, C6400

Switch off
Open Toner Cover
Switch on, holding "System Menu"
Go to "Secure Setting"
"Enter"
Hold "Start" "#" "Enter"
Scoll down to "Maintenance Mode"
"Enter"
Scoll down to "U163"
Scoll do "Execute"
"Enter"
Close Toner Cover
Leave run for a few seconds
Switch off
Switch on....

I’m happy to help further over the phone at https://www.6ya.com/expert/ron_9356d26241d4cbf7

Zero-cross signal error
While fuser heater ON/OFF control is
performed, the zero-cross signal is not
input within 3 s.

fuser related problem

Fuser unit Error code, you can try to reset, but if the code still there, you need to change the fuser unit.
This is the way to reset your fuser code;
On the panel press 1087 1087
this will take you to the service mode,(look into the screen)
now on the panel again press 163 and hit the start key.
Look in the screen, you will see execute, select execute by the arrow and hit the start key, the machine will turn off then on. or it will ask you to turn the main power off than on. this might fix your problem, if not! change the fuser.

I’m happy to help further over the phone at https://www.6ya.com/expert/mustafa_06f84c65ab5cc745

press status key
scroll down to service
press enter
press 163
press enter
wait 10 seconds
recycle power

it is a zero cross signal error, could be poor conections or power supply faulty or engine board faulty. you will need to get a tech to check it out