03/14/91       13:56          Cellular One 250

          David Walker             (NT)      Dept 1157_RTP

From:     Jeff Sharpe              (BNR)     Dept 3303 PERFX

Subject:  IBM Ball Replacement

This is an actual alert to IBM Field Engineers that went out to all
IBM Branch Offices.  The person who wrote this was very serious. 
The rest of us may find it rather funny.

_________________________________________________________________

Abstract:  Mouse Balls Available as FRU (Field Replacement Unit)

Mouse balls are now available as FRU.  Therefore, if a mouse fails
to operate or should it perform erratically, it may need a ball
replacement.  Because of the delicate nature of this procedure,
replacement of mouse balls should only be attempted by properly
trained personnel.

Before proceeding, determine the type of mouse balls by examining
the underside of the mouse.  Domestic balls will be larger and
harder than foreign balls.  Ball removal procedures differ
depending upon the manufacturers of the mouse.  Foreign balls can
be replaced using the pop-off method.  Domestic balls are replaced
using the twist-off method.  Mouse balls are not usually static
sensitive.  However, excessive handling can result in sudden
discharge.  Upon completion of ball replacement, the mouse may be
used immediately.

It is recommended that each replacer have a pair of spare balls for
maintaining optimum customer satisfaction, and that any customer
missing his balls should suspect local personnel of removing these
necessary items.

To re-order, specify one of the following:

P/N 33F8462 - Domestic Mouse Balls
P/N 33F8461 - Foreign Mouse Balls