Handpieces
The following "Heater Assembly Checkout Procedures" are applicable to all PACE handpieces except for
the TT-65 ThermoTweez handpiece. Refer to either of the TT-65 manuals (P/N 5050-0300 or 5050-0336)
for troubleshooting procedures pertinent to that handpiece.
Perform the "Heater Assembly Checkout Procedures" with the handpiece (and heater) at room
temperature. If the handpiece is warm, resistance readings will be different from those shown.
CORRECTIVE MAINTENANCE
Table I. Heater Assembly Checkout Procedures
Corrective Maintenance
Symptom
No Heat
Checkout Procedure
Check resistance Pin 2
to Pin 5. Refer to
Heater Specs. column
at right.
If resistance is high -
Check resistance Pin 3
to Pin 6.
If circuit reads open -
Cause
Open
heater
Open
sensor
Solution
Replace Heater
assembly.
Replace Heater
Assembly
Handpiece
is
overheating
Check resistance Pin 3
to Pin 6. Resistance
should be 110 Ohms. If
circuit resistance reads
less than 105 Ohms -
Shorted
sensor.
Replace Heater
Assembly.
Heater Specs.
SX-80 = 8.6 – 9.1
!
PS-90 = 8.7 – 9.4
!
TP-65 = 9.2 – 10.2
!
TJ-70 = 5.8 – 6.3
!
PS-70 = 11.3 – 12.3
!
TT-65 = 10.7 – 11.9
!
Solder
short in
handpiece
Remove short.
Replace Heater
Assembly and
Fuse F1
Fuse blows
when unit is
turned on.
Check resistance Pin 2
to Pin 5. Refer to
Heater Specs. column
at right.
If resistance is low –
Shorted
Heater
Replace Heater
Assembly and
Fuse F1.
Oxidation
buildup in
Heater
Bore
Clean Heater
Bore with wire
brush.
No ground
on tip.
Check resistance Pin 4
to a new tip. Resistance
should be less than 2
Ohms.
If not -
Defective
Heater
Replace Heater
Assembly.
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