User's Manual

M7X and M7R Page 5-27 Maintenance

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Replacing the RF PA

Ensure the input ac and dc supplies to the radio are disconnected before removing the top

cover.

Do not remove the radio’s top cover for at least one minute after switching off the radio.

Four semiconductor devices used in the RF PA contain the toxic material beryllium.

Although no procedures in this documentation instruct semiconductor replacement,

equipment covers are removed exposing the devices. Users should be aware that there could

be a hazard should the output transistors become damaged.

Fig 5-17 shows the RF PA; the four semiconductors containing beryllium are outlined and have the

markings PAS1068, PAS1074 or PAS1075.

Fig 5-17 Beryllium Hazard Components

This equipment contains devices sensitive to electrostatic discharge. Precautions applicable

to handling such equipment, including wearing a static protection wrist strap connected to

earth, should always be taken.

WARNING Dangerous Voltage

WARNING Beryllium Hazard

Caution ESDs