Hakko Electronics FR-803 - MAINTENANCE; INSPECTION; Broken Heater or Sensor; Replacing the Fuse

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9. MAINTENANCE / INSPECTION
●
Broken Heater or Sensor
①
Open the handpiece.
1. Retract the vacuum pipe to its shortest
length.
2. Remove the three screws holding the
handpiece together.
3. Move the tube downward.
4. Remove the pipe from the protruding
portion of the handle.
CAUTION
Quartz glass and heat insulation are inside
the pipe. Be careful not to drop or lose
these items.
5. Disconnect the heater sensor connector
and remove the heater.
CAUTION
Do not apply excessive force to the
vacuum pipe.
②
Measure the resistance value.
1. Measure the resistance value (a) of the
sensor. The normal value is 0Ω.
2. Measure the resistance value (b) of the
heater. The normal values are approx-
imately 33Ω (±10%) (100-120V), 85Ω (±
10%) (220-240V) at room temperature.
If the resistance value is abnormal,
replace the part.
(Refer to the instructions included with the
replacement part.)
●
Replacing the Fuse
1. Unplug the power cord from the power recep-
tacle.
2. Remove the fuse holder.
3. Replace the fuse with new one.
4. Put the fuse holder back in place.
a
b
CAUTION
Since there are various hazards with replacing the
heating element, be sure to turn off the power and
replace them according to the avove procedure.