HAKO 850B - Maintenance and Inspection; Heating Element Check; Fuse Replacement

MAINTENANCE / INSPECTION
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● Broken heating element
A. Open the handpiece
1. Remove the three screws holding the
handpiece together. (Figure 1)
2. Move the tube away from the handpiece,
as shown.
3. Open the handpiece. Disconnect the
grounding wire sleeve (1) and pipe from
the protruding portion of the handle.
Remove the pipe.
CAUTION
Quartz glass and heat insulation are inside the
pipe. Be careful not to drop or lose these items.
4. Disconnect the connector (2) and remove
the heating element.
B. Measure the resistance
value
Connect an ohmmeter across the connector
terminals (a). The correct values are approxi-
mately:
26-40Ω (100-120V), 70-100Ω (220-240V).
If the resistance value is incorrect, replace
the part.
(Refer to the instructions included with the
replacement part.)
CAUTION
Handle the heating element with care.
Never rub
the heating element wire!
Insert the handle's projection into the hole in the
pipe.
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● Replacing the fuse
1. Unplug the power cord from the power
receptacle.
2. Remove the fuse holder.
3. Replace the fuse.
5A (100-120V), 3.15A (220-240V)
4. Put the fuse holder back in place.
(Figure 1)
Connector (2)
Grounding wire
sleeve (1)
(a)
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