Landice L Series Diagnostic And Service Manual page 105

Is the green AC PW R
4.1
light on the relay board
lit?
YES
4.2
Is the green VDC
light on the relay
board lit?
YES
1. Unplug the 9 wire connector from the relay board and inspect all wires for a loose
4.3
or pushed pin. Be sure harness is routed under the elevation motor and secured
with a plastic zip-tie.
2. Unplug the 12 wire connector from the upper display board and inspect all wires for
a loose fit or pushed pin. Check for 12 to 15VDC across the Black (+) wire and the
Green (-) wire.
Are harness wire connections intact?
1. On PST's and ST's only, remove
Faceplate from the display board and
press START button on display board. If
4.4
treadmill starts use a phillips head
screwdriver or x-acto knife to spread
fastener pins. If display board will not stay
mounted or any buttons are concave
replace the faceplate.
2. On PT's, CT's & ET's conduct
Membrane bypass test (See pages 63,64)
If treadmill starts replace Membrane Panel.
If not replace the upper display board.
Upper display fails to light when START is pressed.
NO
NO
YES
1. Plug a lamp into the wall outlet to confirm it
it is live.
2. Check line cord condition and connection.
3. Unplug treadmill and use a multimeter to
check the fuse. If it is bad, swap with a
spare MDA-20 fuse.
4. Plug in treadmill and use a multimeter to
check for 120VAC across HOT and NEUT
terminals of relay board.
1. Check all connections to black 12VDC
power supply.
2. Confirm the wire with a dashed white line
(or ribbed black) is plugged into +VDC
terminal on the relay board.
3. Confirm the solid black wire is plugged into
SGND terminal on the relay board.
4. Replace 12VDC power supply.
NO
Repair upper harness or replace
upper harness.
105