Epson RC620 CU Manual page 190

Maintenance 6. Maintenance Parts Replacement Procedures
(6) Remove two screws for the COM panel
(7) Remove the following connectors from
(8) Slightly pull out the CPU board (Faster)
NOTE

(9) Make sure all cables are disconnected and remove the CPU board from PCI-BPB slot.
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on the back panel.
the CPU board (Faster).
Cable No. (21), (22), (23), COM1, 2
If RAID option is set:
Remove Cable No. (24)
If DVD drive is connected:
Remove Cable No. (25)
Refer to Maintenance: 3.2 Diagram of Cable Connections.
from PCI-BPB slot and while holding
the board with one hand, remove Cable
No. (22)-3.
Cable of the CPU board is connected
with PCI-BPB. Be sure to pull the
board slowly.
(25) (23) COM1,2
(24)
(21)
(22)-3: Remove in step (8)
(22)-2 (22)-1
(22)-3
RC620 Rev.8