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SECTION IV
SERVICE AND REPAIR
The Dentsply-Cavitron Model 2001 Ultrasonic Dental Unit requires little or no service. If service
should be necessary, the following measures will eliminate most difficulties you may encounter.
Where
more
than
one
corrective
measure
is shown,
follow the indicated
sequence.
If the
corrective measures fail, the unit should
be returned to Dentsply International Inc.
SYMPTOMS
CAUSES
CORRECTIVE MEASURES
Water drip from hand-
piece when unit not
operating.
Water solenoid valve open.
(SV1)
Repair or replace solenoid valve.
Loud hum from
generator.
Air trapped in water regulator.
(WR1)
1. Tilt unit at different angles with handpiece
activated.
2. If problem persists, replace regulator.
High water pressure.
Install water pressure regulator on main water
supply line and reduce pressure to 60 psi.
Insert stops vibrating
when coming in
contact with tooth.
Insert malfunction.
Test with another insert. If test insert works
properly, original insert is damaged.
Insert not pushed in far enough
for automatic pick-up.
Check if insert seats in handpiece.
Malfunction of handpiece
assembly.
Check continuity of handpiece lines. Refer to
schematic, Figure 8 or 9 as applicable.
1. Connect ohmmeter between terminal, P4-1
and P4-4.
2. Connect ohmmeter between P4-5 and P4-4*
Flex handpiece line and check for
intermittent operation.
*If ohmmeter reading is not constant or not
reading, handpiece and cable assembly is
likely to be damaged and should be repaired
or replaced.
Loose wiring or defective solder
joint in unit wiring.
Visual check of all unit wiring.
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