POSYC 4301/4302/4303 series industrial PCs
Installation, use and maintenance manual - EN
Rev. 1.02
34
9 Ordinary maintenance
9.1 Cleaning the touch screen sensor
The cleaning of the touch-screen sensor must take place rather frequently to avoid the stratification of the dirt
derived from the hands or from materials that were accidentally in contact with its surface and to maintain the
best possible visibility of the display.
If necessary, the front of the device (keyboard and viewing window) can be cleaned with a very soft cleaning
cloth (recommended in microfibre) dampened with water or cleaning solution for display.
9.2 Replacing the clock battery
The replacement of the internal clock battery, in addition to ensuring the maintenance of the same, is useful
not to lose the settings of the CMOS Setup (basic information for the operation of the computer).
Depending on the climate and how the computer is used, this can have a very variable duration starting from
the POSYC production date.
It is therefore suggested to carry out the preventive battery replacement at least every 2 years taking care to
always use the exact model (3V lithium battery - CR2032).
To replace it, simply remove the back cover of the computer with the power switched off and replace the battery
(shown in the figure) with a new one. If the existing battery is not completely discharged, performing the re-
placement operation in a few seconds, it will not be necessary to correct date / time and settings of the CMOS
Setup.
