Brother S-7200C . CONTROL BOX AND MOTOR

S-7200C
14. CONTROL BOX AND MOTOR
145
１４. CONTROL BOX AND MOTOR
１４-１. Checking the motor and power supply
CAUTION
Turn off the power switch and disconnect the power cord from the wall outlet before carrying out these operations.
The machine may operate if the treadle is depressed by mistake, which could result in injury.
If the power switch needs to be left on when carrying out some adjustment, be extremely careful to observe all
safety precautions.
<Motor>
1.
Disconnect the motor connector 4P (1) from the control
box.
2.
Measure the resistance of the motor connector (1) using
an ohmmeter in the x 1 range.
If the value is as shown in the table below, the connector
is normal.
Between 2–3
Between 3–4
Between 4–2
Approx. 1.8Ω
<Power switch>
1. Disconnect the power supply connector 3P (2) from the
control box.
2. Turn on the power switch.
3. Measure the voltage at the power supply connector (2)
using the AC voltage range of a multimeter, and check
that the voltage is within the allowable range for the
specified voltage rating.
If the value is as shown in the table below, the connector
is normal.
Between 2–3 AC
180V–265V
2116B
Ground wire
2117B