Heater Replacement - Pace ST 40A Operation & Maintenance Manual

Corrective Maintenance

Heater Replacement

Insure that the installed heater assembly of your handpiece is defective by referring
to Table V (Heater Assembly Checkout Procedures). If replacement becomes
necessary, follow the procedure below for best results.
1. Disconnect the Sodr-Pen from the power source.
2. Unscrew, remove and discard the Heater Retaining Nut. If the Heater
Retaining Nut does not unscrew easily, gently apply a back and forth side
force to the tip end of the Heater Assembly to release the heat seal created
after extended use.
3. Loosen the white plastic Strain Relief Screw (if present) located at the
rear of the Handle. Gently push the Cable Assembly through the Sodr-
Pen (toward the Heater Assembly) to expose the Insulator. Slide the
Insulator back (toward the Handle end) to expose the 5 lead wire
connections between the Heater Assembly and the Cable Assembly.
4. Disconnect the 5 Heater Assembly leads. Remove the Insulator from the
Cable Assembly leads. Discard the old Heater Assembly and Insulator.
5. Feed the Cable Assembly leads back through the replacement Insulator with
the notched end of the Insulator facing the Heater Assembly end. Feed the 2
Blue leads through the holes marked with the letter "B" and the 2 White
leads through the holes marked "W". Feed the Green lead through the
unmarked hole. Insure that the Cable Assembly leads do not become
crossed with each other.
6. Plug the wire leads of the replacement Heater Assembly into the wire
leads of the Cable Assembly using the table shown in the illustration as a
reference. Match like colored wires. Connect the Green Cable Assembly
lead to the non-insulated Heater Assembly lead. Insure that the leads do
not become crossed with each other.
7. Slide the Insulator over the lead connections and against the back of the
heater housing. The metal tab on the heater housing (Heater Tab) must
slide in the Wide Notch (see illustration) on the end of the Insulator.
8. Gently pull the Cable Assembly back through the handpiece until the
Heater Assembly rests against the plastic Handle. Gently twist the Heater
Assembly (if necessary) to slide the narrow notches on the Insulator
between the tabs on the inside of the Handle.
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