SX-80
SX-80
SX-80
SX-80
SX-80
10
Heater Assembly Checkout Procedures
Symptom
Checkout Procedure
Cause
Solution
No heat
Check resistance - Pin 2 to Pin 5.
Resistance should be 8.2 to
9.5 ohms. If not - -
Open Heater
Replace Heater
Check resistance - Pin 3 to Pin 6.
If circuit reads open - -
Open Sensor
Replace Heater
Handpiece
overheating
Check resistance - Pin 3 to Pin 6.
Resistance should be 110 ohms. If
circuit reads less than 105 ohms - -
Shorted Sensor
Replace Heater
Fuse blows
when unit is
turned on
Check resistance - Pin 2 to Pin 5.
Resistance should be 8.2 to
9.5 ohms. If not - -
Shorted Heater
Replace Heater
Assembly
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
Handpiece Connector Plug
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.
