Why is my MentorXL not saving its settings?

Owned by Thomas Startup (Unlicensed)
Jul 20, 2018
2 min read

Problem

MentorXl configuration settings are not being saved over a power restart.

Solution

This problem could be associated with either a backup battery failure or not allowing a selected parameter to ‘time-out’ in the menu structure.

The fault can be determined easily; if it is a backup battery problem, all user settings will be lost. If related to the menu time-out, only the setting(s) that have been applied within a menu tree may be lost.


To overcome the loss of parameter settings once the required sub-function is selected, (the OK button is used to choose it), and the currently selected option is indicated by asterisks (e.g. *ON*), do not use the ‘Cancel’ function to return to a higher menu. Although the chosen setting will be applied immediately, it has not been stored, and will be lost when power is removed.

It is essential that the currently selected parameter is allowed to ‘time-out’, and then revert to a higher menu tree automatically. Using this method ensures the parameter is saved to memory.

An alternative workaround: in the Setup > More > Display menu set the <Menu Timeout> to *Disable* and the <Set Period> to 3 secs. Using this method, there is no Menu timeout, and the display will be left at the last selection.

Once the parameter has been set the unit can be returned to its normal operating mode, or another function chosen.


If the MentorXL is losing all of its settings this may be due to the battery back-up circuit fault.

A quick test can confirm this. Isolate the mains power and remove the top cover of the MentorXL, next re-apply power to the unit. Remove the battery jumper link J48, this link is labelled 'BAT' and is on the right-hand end of the motherboard, half way down.

Using a digital volt meter, measure the voltage between the chassis and TP68 (labelled BAT), the TP is near J48 and should measure approximately 3V. Using the DVM measure the voltage between the chassis and the Battery BT1 at the front right-hand side of the motherboard. The voltage should be approximately 2.4V. Minimum battery voltage is 1.5V before memory loss is likely, if the battery measurement is below 2.0V with the power removed it is recommended the battery should be replaced.



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