Figure 1
Maintenance Manual
DB version 40、60、80
1. To clean the air filter（Recommended once every six months）
A. Loosen the screw on top. (As shown in Figure1)
B. Remove the filter cover.
C. Take the filter out and clean it with clean water and dry it.
D. Put it back and secure the fixing plate with the screw in.
2. To change the diaphragms
IMPORTANT：To open the upper housing, please make sure you
have unplugged the power cord before opening.
A. Loosen the four screws around the aluminum upper housing,
and take the housing off. (As shown in figure 2)
B. Loosen the four screws and disassemble the parts. (As shown in figure 3)
C. Loosen the u-nut in the center of diaphragm.
D. Take the diaphragm off its place.
E. Replace a new one by mounting the rubber studs
into their position.
F. Press the rim of the diaphragm into the ring.
G. Secure the magnet with a new u-nut and screw and put
the diaphragm housing back with the four screws on.
Figure 2
Figure 3
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