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16. Before calling service
This unit is designed and manufactured carefully for trouble-free operation. However, if
you think the unit is faulty, first perform the following checks. If the checks can not solve
your problem, call the vendor of this unit for service.
DANGER
Never disassemble this unit or touch internal electronics.
Symptoms & Checks
Symptom
Check
Did you press the [ON] key firmly?
(In order to prevent unintended power-ON, this unit ignores a
momentary pressing of the [ON] key. You have to press the key
firmly until the unit is powered.)
Is Li-ion battery pack installed in the unit?
Is Li-ion battery pack charged sufficiently?
Unit does not work at
all.
(No display/sound)
Is application program loaded in the unit?
Is screen contrast adjusted properly?
Isn’t the LCD screen viewed in extremely squint angle?
Nothing displayed,
or poorly displayed.
If you are using the unit in dark place, is the LCD backlight turned
ON?
(Cont’d)