Epson RC420, Manual

Page: 148 / 172

Maintenance 10. Replacing Maintenance Parts
138 RC420 Rev.9
(5) Disconnect all cables from the CPU board. (HDD, FDD, Parallel Port, COM1,
COM2, and USB.)
CPU Board: SPI-6941-EPC
HDD
FDD
Parallel Port
Serial Port
COM2
Serial Port
COM1
USB
CPU Board: PC686BX(PC)-EPC850
HDD
FDD
Parallel Port
Serial Port
COM2
Serial Port
COM1
USB
(6) Remove the mounting screw for the CPU board on the back of the Controller and
remove the CPU board from the slot.
(7) Install the new CPU board in the slot. Then, mount the board to the slot with the
mounting screw.
(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
of the Controller.
< Safety Precautions for Lithium Batteries >
CAUTION
■
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.
- 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.