Before entrusting repair, please confirm the following items once more.
Symptoms
Cause
Corrections
Battery is exhausted
Charge the battery
Power switch is in the on
position because of no power in
the battery
Turn off the power switch first
and then turn on
Power is not turned on
(No display on the LCD)
Poor contact between the
contactors in the box
Remove the box and mount again
No LCD or fuzzy display
(bright back)
LCD contrast unsuitable
Adjust the contrast with a screw
driver and tune the program knob
Probe not inserted firmly
Remove the probe and reinstall it
“Wait” keeps blinking
Turn off and wait for a while (2
minutes) because of incomplete
drying after cleaning the crystal
High voltage is not supplied
“Cleaning” keeps blinking
Clean the crystal
Press “START” key in
measurement
Measure again
Concentration display at
“――．――”
Press “MEAS” key in
measurement
Supply high voltages again before
measurement
Battery will be soon exhausted
Charge the battery at once
Battery mark blinks
Poor contact of battery
contactors in the box
Remove the box and mount it
again
Warranty Repair and After-sale Service
21
