S920 Reference Guide
v1.0 | 26
Q: What are signs that the battery has aged or has been damaged?
A: If the total charge of the battery powers the device for approximately half the length of time it
originally did or if the battery does not charge or becomes hot while charging, contact an agent from
your local vendor to replace the battery. If the battery shows signs of swelling or the insulation has
visible breaches or cracks, immediately cease operation of the device and contact an agent from your
local vendor to replace the battery.
Q: Why is the screen so bright/dim?
A: The brightness of the screen can be adjusted. The level of illumination provided by the backlight can
be changed in the device settings.
Q: What should I do if the smart card reader is not working?
A: First check to see if the smart card has been inserted fully and oriented properly. The proper use of
the smart card reader is outlined in the reference guide. Also check the metallic contacts on the smart
card for signs of corrosion or other damage and attempt to use another card to determine whether the
problem is a defective card. Then check the card reader to see if there is foreign matter clogging the
card reader slot. The card reader can be cleaned with standard cleaning cards to prevent buildup of dirt
and debris. If none of the above steps resolve the problem, contact an agent from your local vendor to
repair the device.
Q: What should I do if there is a transaction error when using a smart card?
A: If a smart card is properly read by the card reader, but the device indicates that there is a transaction
error or that the card is not supported, attempt to use another card for the transaction instead or
consult the service provider that issued that card to resolve the problem. Before attempting to use a
smart card, make sure that the contactless card module is not operating simultaneously and that the
device is not near any object producing a strong electromagnetic field. Those conditions may interfere
with the device when it attempts to read the smart card.
Q: What should I do if the contactless card reader is not working?
A: First check to see if the card or device being used has contactless functionality. If it does, then make
sure that the card or device is placed and oriented properly. The proper use of the contactless card
reader is outlined in the reference guide. Avoid placing the device near metallic objects or closer than
20 cm to another device with a contactless card reader. Attempt to read another contactless card to
determine weather the problem is a defective card. If the previous solutions did not work, manually
enter the card information to process the transaction and confirm that the device has malfunctioned. If
none of the above steps resolve the problem, contact an agent from your local vendor to repair the
device.
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