CHAPTER 4 MAINTENANCE
36
4.4 Replacement of Consumable Parts
WI lamp, D2 lamp and fuse are consumable parts. When WI lamp and D2 lamp
exceed their lifetime, light energy may decrease or lamp may not be ON. So
WI lamp and D2 lamp need to be replaced. If user has no WI lamp or D2 lamp
for spare, contact our Service Department for purchase.
WI lamp
（
25-03-0001
）
lifetime
：
1000 hours
D2 lamp
（
25-02-0007
）
lifetime
：
1000 hours
WARNING
Accidents may occur due to electric shock by power supply voltage.
Before open the cover of light source compartment, first turn off the
instrument and pull out power cord to avoid accident.
4.4.1 Replacement of Light Source Lamp
The procedures are as follows(Refer to Figure 4-9
～
Figure 4-15)
(1)Turn off the power supply
（
switch to OFF position
）
，
then wait until light
source lamp cools.
(2) Unscrew the screw of light source compartment cover. Remove cover of
light source compartment.
(3)Replace WI lamp
（
Refer to Figure 4-10
～
Figure 4-13
）
(a) Pull out the old WI lamp gently, and take out old WI lamp from lamp base.
(b) Put the new WI lamp inside lamp base and push to the bottom.
(c) Pay attention that spirality of WI lamp filament should face to light-entrance
slot (at right side).
(4)Replace D2 lamp
：（
Refer to Figure 4-14
～
Figure 4-15
）
(a) Pull out plug of D2 lamp lead
(b) Hold metal part of base of old D2 lamp; rotate anticlockwise to take out old D2
lamp.
(c) Hold metal part of base of new D2 lamp, and rotate clockwise to fix the new D2
lamp.
(d) Plug the pin of D2 lamp lead.
(5) Install cover of lamp source compartment.
