Fire-Lite MS 5024UD MS 5024UDE Field Software Change Procedure

MS 5024UD MS 5024UDE Softw Softw Change Change Software Change Change Softw Softw Change 50125 Rev G 11 23 98 ECN 98 486 Change Change Change Change Change procedure outlines the mechanical installation steps required to install a PROM in the MS 5024UD circuits circuits integrrrrrated circuits integ integ precautions f precautions f circuits precautions for integ circuits integ precautions f precautions f electricity can destroy integrated circuits ICs To prevent damage to the PROM a wrist strap and a PLCC IC insertion extraction tool is highly recommended The manufacturer cannot be respon for damage to the PROM as a result of improper handling Sources Sources Pooooowwwwwer Sources P P Sources Sources P P remove primary and secondary power before working on the system Disconnect battery backup power before working on the system Proceed by disconnecting AC power to the panel at the main service circuit breaker not circuit breaker on the fire control panel s power supply Wait 60 seconds to allow for capacitive discharge before touching any of the system s Reverse the procedure for powering up the system AC first then batteries Circuit Pin Con Circuit Pin Con Circuit Pin Con Circuit Pin Convvvvversionersionersionersionersion Circuit Pin Con proper orientation of any IC removed or installed Note location of Pin 1 with respect to the corner and dot on the body of the IC and the relationship to the flattened corner on the IC socket replacement PROM must be installed in the same manner as the PROM removed Failure to observe orientation will result in destruction of the PROM Pin 1 Pin 1 Pin 1 Pin 1 Pin 1 Cor Cor Cornernernernerner Cor Cor Pin 1 Pin 1 Pin 1 Pin 1 Pin 1 Cor Cor Cornernernernerner Cor Cor Replacement Replacement Replacement Replacement Replacement proper orientation of any IC removed or installed To replace the PROM complete the following steps Remove all power AC and battery before proceeding with PROM replacement If necessary disconnect any installed option modules which may inhibit access to PROM Locate U23 center right of the board Gently loosen and remove the PROM from U23 Install the replacement PROM in location U23 Observe proper orientation The dot on the IC be positioned to the left and the flattened corner of the IC should align with the flattened of the socket Use care to insure that the PROM s pins are not bent or broken during Reconnect any option modules which were removed in Step 2 Reconnect power AC and batteries U23 U23 U23 U23 U23 and TTTTTestingestingestingestingesting and and and and and test the MS 5024UD MS 5024UDE after PROM replacement of 3 50125 Rev G ECN 98 486 11 23 98 Softw Softw Changes Changes Software Changes Changes Softw Softw Changes following Table summarizes the MS 5024UD software changes specifying these changes by Number and Release Number Changes Changes Softw Softw Changes Software Changes Changes Softw Softw following Table summarizes the MS 5024UDE software changes specifying these changes PROM Number and Release Number 50125 Rev G ECN 98 486 11 23 98 of 3