Corrective Maintenance - Pace SX-80 Operation & Maintenance Instructions Manual

SX-80 SX-80
SX-80 SX-80 SX-80

Corrective Maintenance

Your SX-80 requires no special maintenance other than being kept clean. The heater
bore and the heater assembly set screw which secures the tip must be kept free of
oxidation and debris in order to maintain the proper tip-to-ground resistance.
Refer to the Handpiece Connector Plug pin out illustration and the table below for
information on troubleshooting most handpiece problems. Disconnect the
handpiece from the Power Source and perform the "Heater Assembly Checkout
Procedures" with the handpiece (and heater) at room temperature. Use a meter to
check resistance across the Handpiece Connector Plug pins as outlined in the
"Checkout Procedure" column.
Handpiece Connector Plug
Symptom
No heat Check resistance - Pin 2 to Pin 5.
Resistance should be 8.2 to
9.5 ohms. If not - -
Check resistance - Pin 3 to Pin 6.
If circuit reads open - -
Handpiece Check resistance - Pin 3 to Pin 6.
overheating Resistance should be 110 ohms. If
circuit reads less than 105 ohms - -
Fuse blows Check resistance - Pin 2 to Pin 5.
when unit is Resistance should be 8.2 to
turned on 9.5 ohms. If not - -
No Ground Check resistance - Pin 4 to a NEW
on Tip Tip. Resistance should be less than
2 ohms. If not - -
Heater Assembly Checkout Procedures
10
Checkout Procedure Cause
Open Heater
Open Sensor
Shorted Sensor
Shorted Heater
Oxidation buildup
in Heater Bore
Defective Heater
Solution
Replace Heater
Replace Heater
Replace Heater
Replace Heater
Assembly
Clean Heater Bore
using appropriate
wire brush
Replace Heater