Changing the program

Before opening the box, remove the terminal board . It is necessary for the board to be disconnected from power supply during the operation.

Release the 4 closing screws shown in the sketch below . If the case is low and the cover can not be lifted by hand, push by an amount of 3 mm a nonmetallic blade in the contact plane of one of the corners and twist it .
Place the cover near the base of the case. ( They are connector by a ground conductor) and turn it over.

Remove the pins (1) (3), one by one, by releasing the card(2) (4), and twisting it (5), IMPORTANT : Disconnect the battery connector(6).

Remove with an appropriate tool the EPROM memory. Replace it by the new version. It is important to respect the direction because fixing the ic in the wrong direction can damage it. If you face problem in the mounting operation, do not force the ic! Check the pins of the EEPROM ic, they must be regularly spaced in both rows, perfectly aligned and perpendicular to the plane of the case. After complete mounting, verify that all the pins are correctly inserted into the holes and make sure that no leg is folded. Connect the battery connector in the correct direction, and immediately check the screen:the following message must be displayed during 2 seconds. Reclose the cover by following the inverse order. Be careful not to pinch a cable in the connection! Tighten the screws 2 by 2 in diagonal and lock.

Rare incidents

If the screen remains off, try to reset by pressing the corresponding button. If it doesn't work then the problem is due to one of these reasons:

Verify the direction, the pins insertion,etc. Resume the mentioned steps from the start- disconnect the battery again - and eventually insert a new EEPROM ic, especially if the insertion has been inverted by accident.

If this new attempt doesn't work, put the old program back . If the problem persists reinsert the terminal board- without closing the case- and charge ( use the original battery charger, insert the plug in the fixed connector labeled PS) or replace the battery.

Important reminder: the charger is not to be connected when the battery is disconnected.