Corrective Maintenance - Pace TP-65 Operation & Maintenance Instructions Manual

CORRECTIVE MAINTENANCE

Your TP-65 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. Periodically inspect the power cable, connector and handpiece
itself for evidence of physical damage. Do not use a handpiece with a
damaged power cable. Refer to Table II and the illustration following for
information on troubleshooting most handpiece problems. Table III lists the
common handpiece parts.
Use Table II and the Connector Plug illustration to determine the condition of
your TP-65 ThermoPik handpiece. Disconnect the handpiece from the PACE
power source. Use a voltmeter to check the resistance across the handpiece
Connector Plug pins as outlined in the "Checkout Procedure" column.
The handpiece Heater Assembly must be at room temperature (22° C or
72°F) before performing "Heater Assembly Checkout Procedures".
SYMPTOM
No heat Check resistance - Pin 2 to
Pin 5. Resistance should
be 10 ohms.
If not - -
Check resistance - Pin 3 to
Pin 6.
If circuit reads open - -
Handpiece Check resistance - Pin 3 to
overheating Pin 6. Resistance should
be 110 ohms. If circuit
reads less than 105 ohms - -
Fuse blows Check resistance - Pin 2 to
when unit is Pin 5. Resistance should
turned on be 10 ohms.
If not - -
No Ground Check resistance - Pin 4 to
on Tip a NEW Tip. Resistance
should be less than 2 ohms.
If not - -
Table II. Heater Assembly Checkout Procedures
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NOTE
CHECKOUT
PROCEDURE
CAUSE SOLUTION
Open Replace
Heater Heater
Assembly
Open Replace
Sensor Heater
Assembly
Shorted Replace
Sensor Heater
Assembly
Shorted Replace
Heater Heater
Assembly
Oxidation Clean Heater
buildup in Bore using
Heater Bore appropriate
wire brush
Defective Replace
Heater Heater
Assembly