Back to Menu Fig 5-21 Thermal Pad Removal Fig 5-22 RF PA Thermal Pad Position M7X and M7R Page 5-31 Maintenance
Back to Menu Refitting the RF PA To refit the RF PA into the radio: (1) After ensuring all surfaces are clean, fit a new thermal pad to the RF PA as shown in Fig 5-22. The thermal pad is naturally adhesive and is supplied with a protective film on both sides. Partially remove the protective film from one end and carefully position the pad before removing the film completely. As the film is being removed, ensure no air bubbles are trapped between the PSU surface and the film.
Back to Menu Replacing the PSU Module WARNING Dangerous Voltage Ensure the input ac and dc supplies to the radio are disconnected before removing the top cover. WARNING Dangerous Voltage Do not remove the radio’s top cover for at least one minute after switching off the radio. Caution ESDs This equipment contains devices sensitive to electrostatic discharge.
Back to Menu Removing the PSU Module To remove the PSU: (1) Remove the radio’s top cover as detailed on page 5-12. (2) Remove the Interface module as detailed on page 5-26. (3) Refer to Fig 5-20 and identify the RF PA In-Line power connector. Separate the in-line connection. (4) Refer to Fig 5-24 and identify the two-wire power connector. Disconnect the free socket from the chassis plug.
Back to Menu (7) Using a Torx T10 screwdriver, remove and retain the ten M3 x 6 mm screws (part number 36T46330060) that secure the PSU cover shown in Fig 5-26. Remove the cover. X X X X PSU Cover Secured by M3 x 6mm countersunk screws (10 off) X X X X X X Fig 5-26 PSU Module Cover (8) Using a Torx T15 screwdriver, remove and retain the four M4 x 6 mm screws (shown in Fig 5-27) that secure the PSU module to the chassis.
Back to Menu PSU module is secured by four M4 x 6 mm screws located as shown by the arrows. Fig 5-27 PSU Module Showing Securing Screws Refitting the PSU Module To refit the PSU module into the radio: (1) After ensuring all surfaces are clean, fit a new thermal pad to the PSU as shown in Fig 5-28. The thermal pad is naturally adhesive and is supplied with a protective film on both sides. Partially remove the protective film from one end and carefully position the pad before removing the film completely.
