NEC Xen Master System Hardware Manual page 133

System Hardware Manual
1. Remove the battery cable from CN4 on the MBD(
U13 ETU.
2. Connect the cable from the new battery to CN4 on
the MBD( )-U13 ETU.
3. Turn off the KSU power.
4. Using nippers or other similar cutting tool, cut the tie
wrap that fastens the old battery and remove the old
battery.
5. Fasten the new battery with a tie wrap.
6. Turn on the KSU power.
3.3.6 Main Software Upgrade for KSU MBD-U13 Unit
The Xen system uses Flash ROM to store system main
software. This allows convenient upgrade of its ability in
terms of features. The following instructions are for main
software upgrade for KSU MBD-U13 Unit.
1. Down load and store the current data base using
current MAT.
2. Ensure the memory backup battery is connected to
the KSU MBD-U13 Unit (CN4 connector).
3. Power off system.
4. Move SW3-1 to the 'ON (EPROM)' position.
5. Move SW 1-1&2 to the 'ON(UP)' position ("3" is not
used)
6. Install Eprom into Socket IC5 (Refer Fig 5-10)
7. Remove old PAL, Socket IC 30, and install new main
software
compatibility information)
8. Power On system
9. LED's 1 & 2 will flash (approximately 2 minutes) while
Eprom is writing to the Flash Roms
10. LED's 1 & 2 go solid when upload is complete.
11. Power off system when upload is completed.
12. Return SW1 and SW3 to their normal position.
13. Remove EPROM
14. Power on system and operate as normal.
15. Save data base with a compatible MAT (refer
supplier for relevant information).
compatible PAL. (Refer
May 2001
)-
0
supplier for
5 - 115