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23. MAINTENANCE / INSPECTION (Hot air)
A. Remove the heating element
1. Remove the 4 screws that attach the heater pipe to the handpiece. Remove the heater pipe.
2. Remove the mica frominside the heater pipe.
3. Disconnect and remove the heating element assembly.
Mica
Mica
Pipe
（a）
CAUTION
When replacing the heater, please be careful not to apply force, such as vacuum pipe is bent.
（b）
CAUTION
Replacing the heating element is very dangerous. Be sure to turn the power switch OFF and be careful of
the following procedure when replacing the heating element.
B. Measure the resistance value
●Normal heater resistance value
Connect an ohmmeter across the connector terminals (a).
The correct values are approximately: 14Ω (±10%100-110V), 17Ω (±10%120V), 41Ω (±10%
220-240V).
If the resistance value is incorrect, replace the part.
●Normal sensor resistance value
Connect an ohmmeter across the connector terminals (b). If the resistance value is ∞, replace the
part.
Refer to the instructions included with the replacement part.
CAUTION
Handle the heating element with care. Never touch the heating element wire!
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