3
VAL6 KBE5S & KBE5L Trouble Shooting
No.
Possible Cause
How to check
Result
Remedy
8
Power source is not
supplied
Measure voltage of AC
outlet.
Standard: AC120V
(or plug in another power
tool and see if it works)
If the value shows
∞
V,
power cable is not
receiving electricity. (or
if under 100V, could be
power shortage)
Plug into a working
outlet
9
Fuse blows out
Take fuse out from fuse
box, and then check each
conduction with circuit
tester
If circuit tester reads
∞
Ω
, fuse blows out
Find a cause(s) of
blown fuse and solve
it,(refer to #3-7),
then replace with a
new one
10
Power cord is
disconnected
Take power source
connector (CN 1) out
from circuit board, then
check each conduction
with circuit tester
If either of the lead is
broken, power cord is
defective
Make sure the
power cord is
connected, or
replace it
11
Power sorce connector
is loose connection
Plug in power source
connector (CN 1) again,
then turn on
If it works normally,
power source connector
fails on contact
Plug in connector
(CN 1) firmly
12
Transformer connector
is loose connection
Plug in transformer
connector (CN 7) again,
and then turn on
If it works normally,
transformer connector
fails on contact
Plug in connector
(CN 7) firmly
13
Transformer is
defective
Measure voltage at
output side of
transformer connector
(CN 7)
If tester reads normal
voltage at input side, and
reads 0V at output side,
transformer is defective
Replace a
transformer
14
Operation switch
connector is loose
connection
Plug in operation switch
connector (CN 8) again,
then turn on switch
If it works normally,
operation switch
connector fails in contact
Plug in connector
(CN 8) firmly
15
Operation switch is
defective
Take operation switch
connector (CN 8) out,
then check conduction
with circuit tester
If it does't conduct when
turned on switch,
operation switch is
defective
Replace an operation
switch
Heater cannot start up
(
heater does not operate at all with switching on)
Operation lamp is not lit (No lamp is lit)
Standard:
input - AC120V (white-red)
output - AC15V (purple-purple)
Standard: Conducting (0
Ω
) when turned on switch
3
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