User's Manual

M7X and M7R Page 5-22 Maintenance
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Replacing the Processor Module
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.
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.
To replace the Processor module:
(1) Remove the radio’s top cover as detailed on page 5-12.
(2) Refer to
Fig 5-14 on page 5-18 and identify the Processor module’s position (Module D).
(3) At the Processor module, disconnect the three cables listed in Table 5-3.
(4) Using a Torx T15 screwdriver, remove and retain the front and rear module securing screws (
Fig
5-16
).
(5) Carefully lift the module disconnecting it from its socket (
Fig 5-15 on page 5-19).
(6) Place the replacement module in position and press down to ensure it is fully located in the
chassis socket.
(7) Fit and tighten the front and rear module securing screws (
Fig 5-16 on page 5-19).
(8) At the Processor module, reconnect the three cables listed in Table 5-3.
(9) Refit the radio’s top cover (see
page 5-12).
(10) Connect the radio to a PC using the Lemo to USB cable.
(11) Reapply input power to the radio.
(12) Download the Processor module software from the Park Air radio software CD. Instructions for
downloading software are given under the heading ‘Data Loader Application’ starting on
page 5-39.
Table 5-3 Processor Module Cables
Processor Module Connection Cable Part Number Destination
CN3, 10 MHz Reference output 17T11700028 Rear Panel, 10 MHz Reference output
CN5, Rx 90 MHz IF/Linearisation feedback 17T11700023 RF Control module, CN3
CN6, Tx 90 MHz IF 17T11700019 RF Control module, CN4
WARNING Dangerous Voltage
WARNING Dangerous Voltage
Caution ESDs