12
Ledco service dept.,or move on to the next,Intermediate,
troubleshooting level.
2)
Intermediate.
Disconnect the power cord and remove
the right side housing per previous instructions.Using a
multimeter,check the continuity of Forward/Reverse drive
switch by first identifying the row of three terminals closest
to you,putting the probes on the middle(common) terminal
and the lower terminal,and engaging the switch to the
forward position.If there is no continuity,the the switch is bad
and should be replaced(part # PRS 005)and rewired
exactly as shown in the schematic.Similarly,putting the
probes on the center terminal and upper terminal of the heat
switch and manually engaging the reverse jog,no continuity
indicates switch failure.Replace and rewire per the
schematic.The drive system should now be operational.
If the drive system is still non-operational,you should now
check the speed dial potentiometer located directly above
the digital heat display on the right side housing.First
visually check for any disconnected or broken wires coming
from the back of the potentiometer to any of it’s subsequent
connections.Re-connect or replace and rewire as shown in
the schematic.Now,using a multimeter,put the probes on the
grey and brown leads from the potentiometer respectively.
With the pot set at zero on the dial (all the way counter
clockwise)you should get a resistance reading of
approximately 10.00
k
ohms,gradually decreasing in
resistance as you increase the speed dial(turn clockwise) to
wide open.At the wide open setting,you should get a
resistance reading of close to 00.0 ohms.If your meter
shows an open or closed circuit or if there is resistance but
