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SAMSUNG Installation
DCS-816 March 1999
8-1
PART 8. CHANGING SOFTWARE (Figure 8-1)
In order to easily replace the system software, it may be necessary to partially disassemble the
KSU. Follow this procedure step by step.
1. Read carefully the instructions released with the new software or contact your distributor or
dealer for advice.
2. Remove the KSU front cover.
3. Check the memory backup switch on the base board and do as instructed.
In most cases it is recommended you keep the switch ON to prevent data loss.
However, new software sometimes needs to change the database structure, and this
requires you to clear all the data. If so, you will have to set the switch OFF and
reprogram the system after replacing the software (you will need to store user data on
your PC or write it down on paper). Contact your distributor or dealer for advice.
4. Remove the external battery (if installed) and switch OFF the system.
5. Remove the four EPROMs (U703, U704, U705 and U706) from the base board using a chip
extraction tool or by gently prising with a small, flat-bladed screwdriver. Put the removed
EPROMs aside carefully in case you need to reinstall them.
6. Remove the new EPROMs from their protective package and check that the legs of the
EPROMs are straight. Carefully insert the new EPROMs into their designated sockets.
7. Switch the system ON and verify that it is operating. If the system fails to operate, switch the
system OFF and replace the new EPROMs with the old ones. Contact your distributor or
dealer for advice if you cannot fix the trouble by yourself.
8. If the system operates satisfactorily, switch the memory backup switch ON and replace the
cover. Reconnect the external battery, if installed.
9. Program the system if required.
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