Epson RC420 Manual page 148

Maintenance 10. Replacing Maintenance Parts
(5) Disconnect all cables from the CPU board. (HDD, FDD, Parallel Port, COM1,
(6) Remove the mounting screw for the CPU board on the back of the Controller and
(7) Install the new CPU board in the slot. Then, mount the board to the slot with the
(8) Connect the cables that were disconnected in step (5) to the CPU board.
(9) Mount the board holder assembly in the Controller.
(10) Mount the Top Cover to the Controller.
(11) Connect the cables that were disconnected before the board replacement to the back
< Safety Precautions for Lithium Batteries >
■ Lithium batteries contain flammable materials such as lithium, organic solvents,
etc. If misused, batteries may generate heat, explode or catch fire. Observe
the following precautions for safe use of lithium batteries.
- Use the specified type of battery and connect the positive (+) and negative (-)
electrodes correctly.
- Do not allow the positive (+) and negative (-) electrodes to short circuit at
maintenance.
CAUTION
- Do not throw batteries into fire or heat them to high temperature.
- Do not disassemble or alter batteries.
- When discarding batteries, insulate the terminals by wrapping them with tape,
etc.
138
COM2, and USB.)
CPU Board: SPI-6941-EPC
CPU Board: PC686BX(PC)-EPC850
remove the CPU board from the slot.
mounting screw.
of the Controller.
HDD
USB Parallel Port
HDD
Parallel Port
FDD
Serial Port
COM2
Serial Port
COM1
FDD
Serial Port
COM2
Serial Port
COM1
USB
RC420 Rev.9