22
4) If the upgrade is abnormal, upgrade it again.
Fig.21 Software upgrade interface
5.2 Cleaning of V-groove
In case of the contaminant in V-groove, the fiber may not be properly clamped, which will cause the
larger fusion losses. Therefore, V-groove shall be checked and cleaned regularly during the normal work
process. Follow these steps to clean V-groove:
a
）
As shown in Fig.22, open the dust cover;
b
）
Clean the contaminants in V-groove by pushing it with the end of a well-cut fiber along the one
direction;
c
）
Clean the bottom of V-groove with a fine cotton swab moistened with alcohol, and remove the
excess alcohol left in the V-groove with a dry cotton swab.
d
）
As shown in Fig.23, clean the fiber presser with a fine cotton swab moistened with alcohol.
