KaVo ORTHOPANTOMOGRAPH OP 3D Pro, Service Manual, Page: 149 / 192

7 Error codes and troubleshooting
141
7.4.31 Error 46 Emergency stop button is
pressed
CAUSE A
The emergency stop button is activated.
SOLUTION A
Release emergency stop button and dismiss the
error message. If the unit is equipped with a ceph-
alostat, emergency may also be activated from the
cephalostat.
CAUSE B
The emergency stop switch is not working properly.
The switch shall open the circuit when pressed and
make a short circuit otherwise.
SOLUTION B
Check the switch operation with a multimeter and
replace if faulty. If the unit is equipped with a ceph-
alostat, check also the emergency stop button lo-
cated in the bottom of the cephalostat.
CAUSE C
The loopback connector shorting the cephalostat
emergency stop for non-ceph units is missing (shall
be connected to JE006 in the top of the pillar).
SOLUTION C
Attach the loopback connector, or if it’s present,
check that the emergency stop signal is passing
through the connector properly.
CAUSE D
Emergency stop switch cabling is faulty.
SOLUTION D
Short the pins in JA303 and JA304 in the EA300
Extension board. If the error is no longer present,
the cables are faulty and need to be repaired/re-
placed. If shorting the pins in the J304 removes the
error, the problem is related to the cephalostat (ca-
bles, emergency switch, connectors). Check and
repair/replace cables if needed.
CAUSE E
EA300 extension board or R3400 IO board is
faulty.
SOLUTION E
If the error is still present with the pins in JA303 and
JA304 shorted, the error is in the EA300 or R3400
board. Replace both boards.