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2-5 (E)
HDCU-900 MM
2-5. Replacing the PS-587 Board
Replacement Procedure
1. Turn off the main power and disconnect the plug from
the outlet.
n
Wait for at least three minutes before starting replace-
ment, because there are electrically live blocks inside
the machine that could cause electric shock.
2. Remove the rear panel. (Refer to Section 2-3.)
3. Disconnect the connectors (CN23, CN24) of the DC
fan. (Refer to Section 2-4.)
4. Remove the three screws and remove the MB-902
board from the board-to-board connector connected to
the PS-587 board.
5. Attach a new PS-587 board in reverse order of step 4.
n
When connecting the PS-587 board and MB-902
board, the MB-902 board may get out of position by
one pin. Connect the boards securely with great care.
2-5. Replacing the PS-587 Board
PSW3 x 6
PS-587 board
MB-902 board
Board-to-board connectors
Be careful to
connect the
connectors
because they
may get out of
position by one
pin.
PS-587 board
MB-902
board
Connector
connection
at the correct
position
Board-to-board
connectors of
PS-587 board
Board-to-board
connectors of
MB-902 board
Connector
connection
at incorrect
position
Board-to-board connectors