Display Lights Up,Treadbelt Does Not Turn - Landice 8700 Series Service Manual

SYMPTOM
Display lights
up,treadbelt
does not
turn.
Does the relay
"click" when
the treadmill is switched
on?
YES
Check for 120 VAC between
L1
and L2 terminals on the
motor
control
board.
YES
Disconnect the P1, P2 and
P3 wires
from the motor control
board.Check
between P1 and P3 for 5000
ohms
resistance. Check the
resistance
between P1 and P2 varies
from
0 to 5000 ohms when the
speed
control knob is
turned.
YES
Plug P1, P2 and P3 back
into
motor control board. Turn
treadmill
on and turn speed up to 9
mph.
Check for 90 VDC between
A+ and
A- terminals on motor
control board.
1. Check On / Off switch
on
speed control panel.
NO 2. Check wiring between On
/ Off
switch and relay(wiring
harness)
3. Replace
relay.
NO 1. Check fuse on motor
control
board, replace if
necessary.
2. Check for loose
connections
on terminal block or
broken wires.
NO 1. Check wiring between
motor
control board and
potentiometer.
2. Replace speed control
pot.
(#70132 Sprint 1 / #70169
Sprint 2)
NO Replace KBLC-118 motor
control
board.
Replace KB-PWM motor
control. *
72