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9 Maintenance
9 Maintenance
9.1 Changing EPROMs
9.1.1 Replacing a Data EEPROM
Change EEPROM
1. Unplug power supply.
2. Loose front panel and detach it.
3. Remove the processor board (the most left handed board) and put it beside, if necessary
remove the additional board (on the processor board).
4. Remove the chips carefully and replace them with new ones.
5. Ensure that
a) the chip shows in the right direction (slots of the upper chip line and the lower chip line
are reverse.
b) all pins are inserted well.
c) the right chip is replaced.
6. Press it again and plug in the additional board
7. Move the card into the VMS again.
8. Plug in the front panel.
9. Move the cards completely into the housing.
10. Screw tightly.
11. Unplug in the power supply.
WARNING!
It may damage the device if you mix the data EEPROM and the program EPROM up.
NOTICE
If you replace the device, but you want to use the programmed curves in the new device, note,
that you must plug the data EEPROM of the main processor and the EEPROM of the watch-
dog processor from the old device into the new device.
But if you have saved the data in your computer, you may reload them into the new device.
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