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8.2-2
Replacement
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CAUTION
z Replace operation panel board after turning off power SW under care not to be charged with
static electricity.
z It is recommended to replace the board after cooling to room temperature because temperature
of resistors placed on the board immediately tuning off power is high, potentially causing burn.
z Handle flexible cable carefully so that it is not folded and/or damaged. Otherwise malfunction
may be caused.
z Disconnect flexible cable from connector after unlocking it. If the cable is pulled out under
unlocking the connector, electrodes placed at the connector surface may be separated, causing
machine failure. Unlock as per the procedure specified in “8.1 Operation panel”.
z LCD may not function normally after the board replacement. If so, adjust contrast.
z There are two types of operation panel boards. For details, refer to 8.13 Operation Panel
Board, Main Board and Sub Board .
(1) Turn off power SW of machine.
(2) Remove left cover from upper part of machine.
(3) Disconnect all connectors.
(4) Remove green cap from upper part of knob of blood pump flow rate setting volume placed at
front side of machine and loosen exposed screw by screwdriver under pressing the knob by
hand to remove it.
(5) Remove board fixing nuts from machine inside to remove the board.
(6) Prepare new board.
(7) Remove seal, if provided, from buzzer (BZ1).
(8) Attach the new board.
(9) Attach knob of blood pump flow rate setting volume under care of correct 0 point positioning.
(10) Connect the all disconnected connectors.
(11) Turn on power SW of machine.
(12) Try to adjust contrast as per the procedure specified in “10.17. Adjustment of contrast”.
(13) Check correct functioning of each LED.
(14) Check correct functioning of each SW of operation panel.
(15) Return the removed cover to the original position.