IV- 5
[ 3 ] LED does not turn on.
Y
Y
Y
Y
N
N
N
N
N
Y
N
Y
N
Y
LED
does
not
turn
on.
Or
LED
turns
on
temporarily.
Is
the
panel
cover
assembled
correctly?
Is
the
head
cable
of
the
correct
color
connected?
Is
the
head
cable
connected
correctly?
Is
the
connector
(CN6)connected
to
the
power
supply
PCB
correctly?
Are
the
power
supply
PCB,
DC8V
power
PCB
and
main
PCB
connected
correctly?
Y
Y
N
N
Is
the
connector
output
of
the
power
supply
PCB
24
to
26V?
Is
the
output
of
the
pin
(No.1)
on
the
power
supply
PCB
7
to
5V?
Is
the
connector
output
of
the
DC8V
power
PCB
7
to
5V?
Are
the
key
and
LED
signals
of
CN16
normal?
Is
the
cable
of
SB
PCB
connected
correctly?
Correct
the
connection.
Re-assemble
the
cover
correctly.
Correct
the
connection.
Correct
the
connection.
Are
any
of
the
lines
in
the
cable
broken?
Replace
the
SB
PCB.
Replace
the
power
supply
PCB.
Replace
the
DC8V
power
PCB.
Replace
the
SB
PCB.
Are
the
output
signals
from
Pin
3
and
Pin
4
of
CN16
normal?
Replace
the
main
PCB
ASSY.
The
SB
PCB
is
defective.
Replace
the
SB
PCB.
