TM 9-4910-387-14-2
6-2.
TROUBLESHOOTING (cont)
E.
SOLENOID MAY BE DEFECTIVE.
NOTE
The following check is for resistance.
1 Connect one multimeter lead to solenoid contact (1) and connect the
other lead to solenoid contact (2).
CAUTION
When replacing the solenoid (3), make sure the iron
core (4) is inserted into the solenoid. If this is not done,
the solenoid will burn out when power is turned on to
the tester and the START COUNT button is pushed in.
2 Check for approximate resistance reading of 55 ohms. If resistance
does not exist, replace the solenoid (3) (p 6-366).
3 If counting circuit does not function, proceed to step F.
F.
COUNTER PULSE SWITCH MAY BE DEFECTIVE.
1 Loosen four screws (1). Remove cover (2) and plate (3).
2 Connect one multimeter lead to microswitch contact (4) and connect
the other lead to microswitch contact (5). Push down on arm (6)
behind switchbox (7). Check for open circuit.
6-100
