Kyocera Ecosys FS-6700 Service Manual page 48

Troubleshooting
Service errors
Figure 6.10 E4 error
E4
(Fuser heater error)
"E4" shown
immediately after
power up?
Yes
Turn printer power off
and remove power
cable.
Measure DC resistance
between #5 and #8 of
YC721 on KP-499
(fuser) board.
Less than 1MΩ?
Yes
Replace KP-614 board. If not
solved, replace harness between
KP-499 and KP-614 boards.
FS-6700
No
Measure fuser
temperature.
180-220°C?
No
Replace fuser
unit.
6-29
Replace
fuser unit.
roller
No
Yes
Replace KP-614 board. If
End not solved, replace power
supply.