●
Checking Procedure
WARNING:
Unless otherwise directed, carry out these procedures with the power switch OFF and the power UNPLUGGED.
■
Check for a broken heater or
sensor
1. Check for a broken heater or sensor
Measure the resistance
across this position.
1Y100CB3
T7-D24
Verify the electrical integrity of the heater and
sensor.
Measure the resistance of the heater and
sensor while at room temperature (15 to 25
°
C;
59 to 77
°
F). It should be 8
Ω ±
10%. If the
resistance exceeds these limits, replace the tip.
■
Check the grounding line
1. Unplug the connection cord from the station.
2. Measure the resistance value between Pin 2
and the tip.
3. If the value exceeds 2
Ω
(at room temperature),
perform the tip maintenance described on P.12.
If the value still does not decrease, check the
connection cord for breakage.
■
Checking the connection cord
for breakage
1. Remove the soldering tip and the sleeve
assembly.
2. Turn the front piece of the FM-2021 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
Ω
, replace the FM-2021.
Black
Green Red White Blue
1
4
7
2
8
5
6
3
8
