Handpieces - Pace ST 85 Operation & Maintenance Manual

Handpieces

The following "Heater Assembly Checkout Procedures" (Table 4) is applicable to
all PACE SensaTemp handpieces used with the ST 85 system except for the TT-
65 and DTP-80 handpieces. Refer to the applicable manuals for troubleshooting
procedures pertinent to that handpiece.
Perform the procedures with the handpiece heater at room temperature. If the heater
is warm, resistance readings will be different from those shown. Disconnect the
handpiece from the power source. Use a meter to check resistance across the
handpiece connector plug pins as outlined in the "Checkout Procedure" column.
Symptom
Handpiece
does not heat.
Handpiece
overheating.
Fuse blows
when unit is
turned on.
No Ground on
Tip.
Heater Specifications
PS-80 = 8 - 10 o hms PS-80 = 8 - 10 o hms PS-80 = 8 - 10 o hms PS-80 = 8 - 10 o hms
SX-80 = 8 - 10 o hms SX-80 = 8 - 10 o hms SX-80 = 8 - 10 o hms SX-80 = 8 - 10 o hms
SX-70 = 8 - 10 o hms SX-70 = 8 - 10 o hms SX-70 = 8 - 10 o hms SX-70 = 8 - 10 o hms
TP-65 = 9 - 11 ohms TP-65 = 9 - 11 ohms TP-65 = 9 - 11 ohms TP-65 = 9 - 11 ohms
TJ-70 = 6 - 8 o hms TJ-70 = 6 - 8 o hms TJ-70 = 6 - 8 o hms TJ-70 = 6 - 8 o hms
Table 4. Heater Assembly Checkout Procedures
Checkout Procedure
Check resistance - Pin 2 to
Pin 5. Refer to "Heater
Specifications" column.
If resistance is high - -
Check resistance - Pin 3 to
Pin 6. If circuit reads open -
-
Check resistance - Pin 3 to
Pin 6. Resistance should be
110 ohms. If resistance is
less than 105 ohms - -
Check resistance - Pin 2 to
Pin 5. Refer to "Heater
Specifications" column. If
resistance is low - -
Check resistance - Pin 4 to
a NEW Tip. Resistance
should be less than 2 ohms.
If not - -
Corrective Maintenance
Cause
Open Heater
Open Sensor
Shorted
Sensor
Shorted
Heater
Oxidation in
Heater Bore.
Defective
Heater
Connector
Plug Pinouts
Solution
Replace Heater
Assembly.
Replace Heater
Assembly.
Replace Heater
Assembly.
Replace Heater
Assembly & Fuse.
Clean Heater Bore
using appropriate
wire brush.
Replace Heater
Assembly.
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