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640 Tanita Scale Exam Table Troubleshooting Chart

Only the complete digital scale assembly is available thru Midmark. For digital scale components, contact TANITA Corporation @ 847-640-9241

Applies to Serial Number V2200 through V1515925

Problem	Probable Cause	Check / Test	Correction
Nothing appears on display when the ON / ZERO button is pressed.	If applicable AC adapter is disconnected or malfunctioning.	Check AC adapter connections at the display and at the wall outlet.	Secure connections. If necessary, replace AC adapter*.
	If applicable Batteries are low.	Replace batteries, or use AC adapter.	Replace old batteries with six new AA batteries.
	Digital display is malfunctioning.	-	Replace digital display*.
Digital display acts erratically.	Mode setting has been lost due to a power surge or replacement of digital display.	Check mode setting.	Adjust mode setting to: H8830 Refer to:Digital Scale - Display Mode Setting
Digital display works, but measured weight stays at zero with weight on table.	Display harness loose or damaged. The display harness connects the digital display to the scale platform	Check display harness connections.	Secure connections. If necessary, replace display harness*.
	Scale platform is malfunctioning.	-	Replace scale platform*.
Measured weight is inaccurate.	Paper roll interfering with table top.	Check to see if paper roll is in contact with table top.	Reduce the diameter of the paper roll, or remove paper roll completely.
	Table is not level.	Place level on table top.	Adjust leveling feet as necessary.
	Table is located where excessive vibration occurs.	Check for signs of vibration at table location.	Move table to another location.
	Digital scale out of calibration.	Refer to: Digital Scale Verifying Scale Accuracy.	Refer to: Digital Scale - Calibration Procedure
	Display harness loose or damaged. The display harness connects the digital display to the scale platform.	Check display harness connections.	Secure connections. If necessary, replace display harness*.
	Digital display or scale platform malfunctioning.	-	Replace display* / platform* as necessary.
Linear scale is inaccurate.	Scale label is not positioned properly.	Measure from end of table top to scale label.	Reposition label if necessary.
Linear scale is inaccurate.	Measuring arm out of adjustment.	Refer to: Linear Scale -Checking Arm Alignment	Adjust arm as necessary.