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34
Symptom
Checkout Procedure
Cause
Solution
Handpiece
does not heat.
Check resistance - Pin 2 to
Pin 5. Refer to "Heater
Specifications" column.
If resistance is high - -
Open Heater
Replace Heater
Assembly.
Check resistance - Pin 3 to
Pin 6. If circuit reads open -
-
Open Sensor
Replace Heater
Assembly.
Handpiece
overheating.
Check resistance - Pin 3 to
Pin 6. Resistance should be
110 ohms. If resistance is
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 - -
Shorted
Heater
Replace Heater
Assembly & Fuse.
No Ground on
Tip.
Check resistance - Pin 4 to
a NEW Tip. Resistance
should be less than 2 ohms.
If not - -
Oxidation in
Heater Bore.
Clean Heater Bore
using appropriate
wire brush.
Defective
Heater
Replace Heater
Assembly.
Heater Specifications
PS-80 = 8-10 ohms
SX-80 = 8-10 ohms
SX-70 = 8-10 ohms
TP-65 = 9-11 ohms
TJ-70 = 6-8 ohms
Handpieces
The following “Heater Assembly Checkout Procedures” (Table 4) is applicable to
all PACE SensaTemp handpieces used with the ST 115 system except for the TT-
65 and DTP-80handpieces. 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.
Repair
Table 4. Heater Assembly Checkout Procedures
Connector
Plug Pinouts
Содержание ST 115
Страница 1: ...Operation MaintenanceManual ST115Systems ...
Страница 41: ...37 Repair Assembly Detail Rear Panel Motor Pump Assembly ƒFront Panel PCB Assembly Transformer ...
Страница 42: ...38 Repair Wiring Diagram ...
Страница 43: ...39 Repair Schematic ...
Страница 44: ...40 Repair ...