Hakko Electronics FM-202 - Page 14

• Checking Procedure
^WARNING:
Uniess otherwise directed, carry out these procedures with the power switch OFF and the power UNPLUGGED.
■ Check for a broken heater or
sensor
■ Check the grounding line
■ Checking the connection cord
for breakage
Black
■ Replacing the fuse
1. Check for a broken heater or sensor
Measure the resistance
across this position.
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Verify the electrical integrity of the heater and
sensor.
Measure the resistance of the heater and sen¬
sor while at room temperature (15 to 25°C; 59
to 77°F). It should be 8Q±10%. If the resis¬
tance exceeds these limits, replace the tip.
1. Unplug the connection cord from the station.
2. Measure the resistance value between Pin 2
and the tip.
3. If the value exceeds 2Q (at room temperature),
perform the tip maintenance described on p.12.
If the value still does not decrease, check the
connection cord for breakage.
1. Remove the soldering tip and the sleeve as-
sembly.
2. Turn the front piece of the FM-2027 clockwise
and remove the cover.
3. Measure the resistance values between the
connector and the lead wires at the socket as
follows:
Pin 1 - Red Pin 2 - Green
Pin 3 - Black Pin 5 - White
If any value exceeds 0£2 or is oo, replace the
FM-2027.
1. Unplug the power cord from the power recep-
tacle.
2. Remove the fuse holder.
3. Replace the fuse.
4. Put the fuse holder back in place.