User's Manual

35
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Yantai 264006, P.R. China
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XIX. Technical Inspection
Perform a technical inspection to check the following items each time before you use the
device.
 Exterior of the device (no crack on the enclosure);
 Lens and eyepiece (no crack, oil, stain, or other sediments);
 Status of the rechargeable battery (fully charged in advance) and electrical contact (no
salinization or oxidation).
XX. Maintenance
The maintenance should be carried out at least twice a year and includes the following steps:
 Wipe the surface of metal and plastic parts to clear off dust and dirt by using a cotton cloth.
Silicone grease may be used for the cleaning process;
 Clean the electric contacts and battery slots on the device using a non-greasy organic
solvent;
 Check the glass surface of the eyepiece and lens. If necessary, clear off the dust and sand on
the lens (it is perfect to use a non-contact method). Use a specialized wiping tool and
solvent to clean the optical surfaces.
XXI. Troubleshooting
The following table lists all problems that are likely to occur during device operation. Check
and address problems by referring to this table. If faults not included in this table occur or you
cannot fix the fault, return the device to its vendor or supplier for troubleshooting.
Fault
Possible Causes
Solution
The scope cannot be
The battery is out of charge.
Charge