YASKAWA VS-626MT Series Manual page 13

FOR TYPO YS-626 A.C . SPINDLE DRIVE
Instructions for Removal and Installation of the Spindle
Drive Circuit Boards
1 . Shut off the Control and turn off the Main Power Switch
2 . Open the door to the Spindle Drive Cabinet
3 . Remove the clear plastic cover on the Spindle Drive .
4 . Make a list of all the wires onto the terminal strips on both the large and small
boards on the spindle drive . These strips are located on the left side of both
boards and also there are some small terminals on the bottom of the small board .
5 . Remove all wires from the board to be replaced
*CAUTION : Insure that your wire list is complete and correct before removing any
wi res
6 . Remove all ribbon connectors and if necessary remove the connector with the yellow
wires at the top of the large board (it has 5 straight pins in a row)
7 . If the large board is to be removed : At the top of the board there are 2 pairs of
Red and White wires (the wires are wound together as a twisted pair) Trace these
back to their white connectors and pull the connectors apart .
*NOTE : These plugs are labeled I and 2 .
3 . The small board is held down by plastic squeeze tabs . To remove the board, squezze
the tabs together with a pair of needle-nose pliers while gently lifting the
board . When the board is free, lift it gently away ,and set it aside .
*CAUTION : When handling circuit boards ensure that they are not set on a wet
surface . If possible set them on plastic of some sort .
9 . The large board is no nnally held down by 9 screws,8 of which are located on the
outside edge of the board . The remaining screw is located in the very middle of
the board . Remove the screws and gently lift the board free .
10 . To install the new boards simply reverse the above procedure . All of the Ribbon
cables and all of the connectors are keyed to fit only in one direction in their
appropriate sockets . Ensure that all of the wires on the terminal strip are in
their proper location and that
they are tightly screwed down .
If you have any questions or problems please call :
YASNAC Service Department
Phone Number (312) 564-0806
Please return the bad boards to :
YASNAC America Inc .
Attn : Field Service Doe-partnent
305 Era Drive
Northbrook, Illinois 6M$2