Brother MD-802 Service Manual page 27

(tCHECKING THE MOTOR))
HI Motor
Torque thermister
1. Remove the motor code (6P connector) from the
connector part of the control box.
2. Measure with the tester set in the resistance range
as follows.
• If the tester reads approx. 2-3 ohm at any position
between 4 (red) and 6 (black) with the resistance
range xl, it is normal. It should read approx. 2-3
ohm at each position while turning the motor
pulley slowly. If it reads approx. 10 ohm or more
at some positions, it is out of order. However, if
the pointer swings to much extent while turning
the motor pulley, be sure to measure after stop¬
ping the pulley.
• If the tester reads approx. 5 K-40 Kohm when
measured at any position between 3 (black) and
6 (black) with the resistance range xl, it is normal.
• If the tester reads approx. 5 K-40 Kohm when
measured at any position between 1 (yellow) and
2 (yellow) with the resistance range xl, it is
normal.
2 Brake
1. Remove the brake code (2P connector) from the
connector part of the control box.
2. Measure with the tester set in the resistance range
as follows.
•If the tester reads approx. 7-9 ohm when measured
at any position between 1 (black) and 2 (black)
with the resistance range xl, it is normal.