Checkline MK-720 - Manual (Page 30)

（hapter 4 ９roubleshooting
（he“k this list first for the “ases whi“h are to be “onsi”ere” as malfun“tions.
If any “ase whi“h is not in this list o““urs, or if the “ase it is not re“overe” even after “ountermeasure shown
here, “onta“t the agent from whi“h you pur“hase”. In the “ase you ha” pur“hase” from us ”ire“tly, please sen”
email to us.
<Tokyo@jfe-a”vante“h.“o.jp>
Please kin”ly let us know the mo”el name, type number, an” symptoms at “onta“ting us.
Symptoms Possible “auses （ountermeasure
Refer
page xx.
Mk-720 “annot be powere”
up.
Battery setting is
in“orre“t.
（he“k if the battery is inserte” “orre“tly. P.2
Batteries ”raine”. Renew batteries. P.2
S“reen ”oes not ”isplay.
Battery setting is
in“orre“t.
（he“k if the battery is inserte” “orre“tly. P.2
Batteries ”raine”. Renew batteries. P.2
（ontrast setting is not
appropriate.
Set again at “ontrast a”justment win”ow in setting mo”e. P.3
）ouble frequen“y
“omponent rate an”/or
soun” pressure is seeme”
too small.
MK-720 is not pointe”
towar” “orre“t
”ire“tion.
MK-720 has ”ire“tivity.
Please point MK-720 towar” “orre“t ”ire“tion.
P.4
Soun” ”oes not leak from
”istributing box et“.
MK-720 is an instrument whi“h “at“hes soun”. So it “annot
“at“h ”is“harge from fa“ilities whi“h ”o not allow soun”
leaking.
P.4
Measuring range setting
is not “orre“t.
MK-720 may be not able to ”ete“t ”is“harge at the “ase of
measuring in － range for small soun”.
（hoose appropriate range su“h as L or M.
P.5
Soun” is not au”ible from
an earphone
Earphone is not
“onne“te” properly.
（onne“t earphone “o”e “orre“tly.
Earphone is out of
or”er. （he“k earphone. (ex. “onne“t earphone with other ”evi“e
su“h as ra”io.)
The soun” is too small.
There may be a “ase that MK-720 “at“h ultrasoun” but soun”
from earphone is very small.
Please “he“k your MK-720 using referen“e os“illator et“.
（ommuni“ation with
“omputer is impossible.
USB “able is not
“onne“te” properly.
（onne“t USB “able “orre“tly.
）river software is not
installe”.
Install ”river software. P.6
（OM port number is
in“orre“t.
To enable “ommuni“ation between MK-720 an” “omputer, （OM
port number (in”i“ate” by “omputer) must be set on
”atasheet.
Set “orre“t （OM port number on ”atasheet.
P.9