Product data

WN-5220-V Module Level Service Guide
19
If this is true for the defective electronic controller
board being replaced, you will need to remove the 3 sets
of nuts and washers from the back of the new
(replacement) electronic controller board prior to
installation. Otherwise the new board will be over-
flexed in that area and may lead to premature failure.
Make sure that the two black heatsinks remain with
the parts referenced as U43 and U7.