Mustek KB4000 - Manual (Page 12)

When replacement of keytop is required, it is advisable to use a flattop
(minus sign) screw driver (Do not use the attached key clip for this operation.)
to help getting the key top off gently. Please always first orientate the key tops
before inserting any keytop into the case of the keypad. Failure to do so could
result in permanent damage. Please always match the latching tab on bottom
stem of keytop with the tab in guiding hole and gently press the key top down
till a click sound is heard as indicated in the pictures below.
Labeling On Keytop
Single key top
Latching tab
Tab in the
guide hole
Double key top
The multifunction security device is provided with an easy and durable
method for reminding the user of content programmed in each programmable
key. First preprint (or write) in each cell of the attached colored legend sheet the
“name” for each key. Stick each cell to the corresponding keytop and then put
on the transparent key cap from the accessories. In this way, the labeling will be
protected and resistant to scratch or rubbing.
When re-labeling is required, please use the attached key clip to hook up
the transparent key cap and change the label then re-cap.
Content Programming
The programmable part of the keypad should either have been well
preprogrammed or be programmed in the software setup procedures if the
system integrator has arranged every thing well. Therefore, programming the
content for the keys on this keypad should be not required for end users. Even
if key content modification by end user is required, the software could provide a
handy programming tool in the software so that the system command keys will
not be wiped out. So the description on the programming utility supported by the
KB4000 Series User’s Manual 3 - 4