Yamaha PDM-4210 Service Manual page 51

12.4.5 ABUS-R Circuit Board Removal/Installation Procedure
When removing the circuit board after the main power is turned on/off, wait for at
Note
least one minute before starting to remove the circuit board.
If the circuit board removal is started immediately after turning off the main power,
it can result in electric shock or damage of the circuit due to residual electric
charge.
Remove the circuit board by following the steps below. To install the circuit board, reverse the
removal procedure.
(1) Disconnect the connector CN42 on the ABUS-R board.
(2) Raise the lock of the FPC connectors CN43, CN44, CN45, CN46 to release it and
disconnect the ADM flexible board.
(3) Release the lock of the FPC connector CN41 and disconnect the signal cable (FPC).
(4) Remove the screws (M3X8) fixing the ADM at the 8 locations.
(5) Remove the screws (M3X8) fixing the ABUS-R board at the 1 locations.
(4)
(4)
(2)CN43
Note
(5)
(4)
(4)
(2)CN44
(2)CN45
(3)CN41
(1)CN42
(4)
(4)
(4)
(2)CN46
PDM-4210
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