Nipro SURDIAL, Руководство по обслуживанию, Страница: 178 / 334

8.11-6
Replacement
ܭ
CAUTION
z Replace switching regulator after disconnecting power plug from receptacle. Only power SW
OFF is insufficient to avoid danger because AC supply placed at left side in DENSO box is not
disconnected, potentially causing electric shock.
z Handle switching regulator under care not to be charged with static electricity.
z Power rating of switching should confirm to that power source of machine. Otherwise, fire and/or
machine failure may be caused.
z Inside of switching regulator has heat parts when power turns on.
DO NOT touch the part. Otherwise, a burn may be caused.
(1) Turn off power SW of machine.
(2) Disconnect power plug from receptacle.
(3) Remove left cover from upper part of machine and left cover from DENSO box.
(4) Disconnect all connectors (CN1, CN2).
(5) Loosen screws used to fix the converter board to remove it.
(6) Prepare new converter board.
(7) Attach the new board.
Attach it with CN2 (output) on the left side and CN1 (input) on the right side.
(8) Connect all the disconnected connectors.
Connect the harness for CN51 on DC+24V switching regulator to CN1.
Connect the harness for CN412 on SUB-board to CN2.
(9) Insert power plug in receptacle.
(10) Turn on power SW of machine.
(11) Check correct function of machine.
(12) Returns the removed covers to the original position.