Ericsson MOBITEX BRU3 Safety Instructions page 16

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Figure 9 Removing four screws and a cable kit.
4. Unscrew all screws needed to remove the large metallic plate with the
filter modules as per Figure 10.
Figure 10 Removing filter modules with metallic plate.
BRU3 MANUAL
BRU3 MANUAL, Doc.no: b3saf_en Uen Rev PH1, 2003-10-20