6400 Zero-Cross Signal Error; 6910 Engine Software Ready Error; 7200 Broken Outer Temperature Sensor 2 Wire - Kyocera TASKalfa 3510i Service Manual

Code Contents
Zero-cross signal error
6400
While fuser heater ON/OFF
control is performed, the zero-
cross signal is not input within
3 s.
6910 Engine software ready error
The device won't engage in
ready state in 60 minutes after
warming-up has began.
(A previous timeout process
has not been cancelled.)
7200 Broken outer temperature
sensor 2 wire
The sensor input sampling is
greater than 244.
Related parts
Fuser unit
Engine PWB
BD PWB
Engine PWB
1-4-38
Check procedures/
corrective measures
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Power source PWB (YC6) and engine
PWB (YC24)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the fuser heater PWB.
1. Turn the main power switch off and after
5 seconds, turn it on.
2. Reinstall the engine software.
3. Replace the engine PWB (see page 1-5-
44).
1. Confirm External Temp is displayed by
U139 temperature and humidity (see
page 1-3-65).
2. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
BD PWB and APC PWB (YC2)
APC PWB (YC1) and Engine PWB
(YC27)
3. If the wiring is disconnected, shorted or
grounded, replace the wiring.
4. Replace the BD PWB.
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
44).
2NL/2P8