Psu (Power Supply Unit); Iob (Input Output Board), Mcu (Main Control Unit) - Ricoh B010 Service Manual

Rev. 06/2004
3.9 BOARDS

3.9.1 PSU (POWER SUPPLY UNIT)

Left covers ( 3.1.2)
[A]: PSU ( x 4,
NOTE:
• Before removing the Neutral and Line
bayonet connectors [B], mark them "N"
and "L" before you remove them so you
can match them with the N (left) and L
(right) notations on the board when you
re-connect them.
• If a copy tray support has been installed
below the board, you may need to
remove it in order to remove all the
screws from the PSU board.

3.9.2 IOB (INPUT OUTPUT BOARD), MCU (MAIN CONTROL UNIT)

[A]: Cables
[B]: IOB ( x 8)
[C]: MCU ( x 5)
NOTE: When replacing the MCU, always
reattach the three NVRAMs
(IC101, 108, 109) on the new
MCU.
⇒
IMPORTANT: Before performing Memory
Clear, be sure to write down the
User Code and Counter data and
print out the SMC sheet.
⇒
NOTE: When replacing the NVRAM,
except for IC109 (B0109001: for
counter), NVRAM service parts
are blank RAM (contain no data).
If these RAMs are installed as
they are in the B010, the machine
will not function properly. Therefore after mounting the service part NVRAM
onto the MCU board, be sure to perform Memory Clear (SP5801), then re-
enter the UP/SP mode data manually.
SM
x all)
3-35
BOARDS
B010R907.WMF
[A]
[B]
IC101
IC108
B010R950.WMF
IC109
[A]
[C]
B010