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| 008 Sears CA Treadmill Service Manual [rev 1.0]
Section Three |
Troubleshooting
Treadmill Troubleshooting
>>
Console | Upper Board
Symptom
Possible Cause
Test Procedure
Repair
No display on the
console and the power
switch is dark.
Note: 30750 power
switch is not backlit.
Circuit breaker in home
has tripped.
-Check for dedicated
circuit (20 amp is ideal)
and check wall outlet
voltage (120 VAC).
Reference p14.
Reset breaker.
Failed power switch.
-Make sure power
switch is turned on.
Replace power switch if
necessary.
Failed power cord.
-Take voltage check of
power cord.
Reference p13.
Replace power cord.
No display on the con-
sole and power switch
on machine is lit.
Breaker on machine has
tripped or has failed.
-Reset breaker.
Replace breaker if
necessary.
Improper wiring or AC
wires have failed.
-Check all wiring
coming in from the
power switch to the
motor control board and
to the upper board.
Reference p17.
Connect wires correctly
or replace as needed.
Failed console cable.
-Check console cable
voltages at B7, B8
Reference p22.
Replace console cable.
Failed upper board.
-Check voltage and
continuity of console
cable. Reference p22.
Replace upper board.
Failed motor control
board (MCB).
-Check voltage and
continuity of console
cable. Reference p22.
-Verify the power LED is
lit on the MCB.
Replace motor control
board.
