20
SYMPTOM
CHECKOUT PROCEDURE
CAUSE
SOLUTION
HEATER
SPECIFICATIONS
No heat.
Check resistance - Pin 2 to
Pin 5. Refer to "Heater
Specifications" column.
If resistance is high -
Open Heater.
Replace Heater
Assembly.
SX-70
SP-1A
SP-2A
TP-65
TJ-70
= 8 - 10 ohms
= 10 - 12 ohms
= 8 - 10 ohms
= 9 - 11 ohms
= 6 ohms
Check resistance - Pin 3 to
Pin 6.
If circuit reads open -
Open Sensor.
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.
Fuse blows
when unit is
turned on.
Check resistance - Pin 2 to
Pin 5.
Refer to "Heater Specifications"
column.
If resistance is low -
Solder short in
Handpiece.
Remove Short.
Replace Heater
Assembly & Fuse F1.
Shorted Heater.
Replace Heater
Assembly & Fuse F1.
No Ground
on Tip.
Check resistance - Pin 4 to a
NEW Tip. Resistance should
be less than 2 ohms.
If not -
Oxidation buildup
in Heater Bore.
Clean Heater Bore
using appropriate
wire brush.
Defective Heater.
Replace Heater
Assembly.
HANDPIECES
The following "Heater Assembly Checkout Procedures" are applicable to all PACE SensaTemp 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
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