Fujikura FSM-20PMII, Instruction Manual

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8.2.2 Replacement of Electrodes
The electrodes are worn slightly by each arc discharge, and the tip shape will
gradually become spherical. In such a case, high splice loss, abnormal discharge
or fiber separation may occur. Replace the electrodes as a pair if the number of
arc discharges exceeds 1000.
The following describes the replacement procedure.
1. Turn the Power switch OFF
(1) Open the wind protector to raise the up/down mirror to the up position.
(2) Turn the power switch off.
2. Open the wind protector.
Detach the wind protector handles, and open the wind protector fully.
Refer to section 8.1.2.
3. Replacing the Electrode
See the next figure.
(1) Remove the electrode cover.
(2) Loosen four screws (A) which secures the electrode fixtures. Then
remove the old electrodes.
[NOTE] Just loosen the four screws, and do not remove the v-groove
fixtures or the screws.
(3) Clean the new electrodes with alcohol to remove the oil on the surface.
(4) Insert the new electrodes into proper position in the v-groove of the
electrode base, and gently tighten the four screws. Be careful not to
over-tighten the screws.
[NOTE] While tightening the electrode mounting screws (A), push the
flange of the rear electrode all the way forward against the
electrode base, and push the flange of the front electrode all the
way to the rear against the front electrode base. Failure to secure
the electrodes in the proper position will result in abnormal arc
discharge.
[NOTE] Be careful to ensure that the tips of the new electrodes are not
damaged or bent, and do not contact or touch any part of the
splicer.