23
8. Fa�lure Flow Chart
1. S
w�t
c
h
Fa
�lure
C
a
u
s
e
s
*
Damage to the sw
�
t
ch c�
rcu
�
t
*
D�
stort
�
on of the capac
�
t
�
ve effect due to condensat
�
on
�
n the touch c
�
rcu
�
ts. Mo
�
sture
�
n
the sw
�
tch pl
ast�c
*
S
w�
tches los
�
ng the
�
r propert
�es �
n sw
�
tch keys
2.
C�rcu�t
Fa
�lure
C
a
u
s
e
s
*
Damage to the c
�
rcu
�
t
*
Incorrect connect
�
on of cables on c
�
rcu
�
t
Did the relevant component
work?
Energize the Product
Are the keys lights on when the
keys are pressed?
N
Did the relevant component work?
Y
N
Y
N
No fault
Have you heard the noise indica
ti
ng
that the circuit relay has been
ac
ti
vated? (Clicking)
Is there a problem
with the switch
cable? Do a short
circuit check.
Y
Y
N
Switch cable fault
Cut power. Replace the
faulty component.
Switch fault*
Is the fuse o
ff
?
Y
N
Turn on the fuse
N
Switch or circuit fault
Is there a problem with
the power cable? Do a
short circuit check.
Y
N
Power cable fault
Circuit failure**
Y
Is the voltage value required to be at the
circuit output of the relevant component
observed?
N
Y
Is there a problem with
the component cable? Do
a short circuit check.
Y
N
Cable fault
Component fault
Have you heard the noise indica
ti
ng
that the circuit relay has been
ac
ti
vated? (Clicking)
N
Switch or circuit fault
Y