Epson RC420 Manual page 121

(1) Remove the CPU board from the Control Unit. Refer to the Maintenance 10.2
(2) Replace the lithium battery with new one.
(3) After replacing the lithium battery, set up the BIOS.
RC420 Rev.9
Replacing CPU Board for details.
CPU Board:SPI-6941-EPC
CPU Board :PC686BX(PC)-EPC850
3-1. Turn ON the Control Unit while pressing the <Delete> key on the keyboard.
The [BIOS] dialog will appear.
3-2. Select the "Standard COMS Features" and press the <Enter> key.
3-3. Set the "Date" and "Time" to current date and time. (Use the <Page Up> key
for changing the setting items and the arrow keys <↑> <↓> <→> <←> for
moving a cursor.)
3-4. Press the <Esc> key. The [BIOS] dialog will appear.
3-5. Select the "PnP/PCI Configurations" and press the <Enter> key.
3-6. Select the "IRQ Resources [Press Enter]" and press the <Enter> key.
3-7. Set the "IRQ-5", "IRQ-10", and "IRQ-11" to the "Legacy ISA". (Use the
<Page Up> key for changing the setting items and the arrow keys <↑> <↓>
<→> <←> for moving a cursor.)
3-8. Press the <Esc> key twice. The [BIOS] dialog will appear.
3-9. Press the <F10> key. The message "SAVE to COMS and EXIT (Y/N)?" will
appear.
3-10. Press the <Y> key and then <Enter> key. The system will be automatically
restarted.
Maintenance 2. Regular Maintenance Inspection
Lithium battery
Lithium battery
111