Upper Display Does Not Light Up - Landice 8700 Series Service Manual

SYMPTOM
Upper Display does
not light up.
Check
position of
Safety Key.*
YES
Check for 120 VAC
between points
13 and 14 on
terminal
block.
YES
Check for 9 VDC
between points
5 and 6 on
terminal
block.
6 and 7 on
terminal
block. *
YES
Check for 9 VDC
between pins 1
and 2 on display
board connector
(Red and
Green wires).
YES
Replace
display
board.
(#70130 Sprint 1/
#70130-PWM Sprint 2)
NO AC 1. Check fuse on
motor control
board,
replace if
necessary
A. Check 20
amp in-line
fuse
(Mounted to motor pan) *
2. Check for loose
connections
on terminal
block,damaged
line
cord or wall
outlet for
voltage.
NO DC 1. Check that
all
connections
on terminal
block are
tight.
2. Replace 9 VDC
power supply.
NO DC Check
connections
between
upper board
and lower
components
(wiring
harness)
70