Nokia Customer Care
5 - Disassembly Instructions
RH-37
Issue 1 07/04
Nokia Corporation
Page 11
Dome Sheet Placement
Since the dome sheet has to be removed before every soldering process a new dome
sheet needs to be placed between the PWM and light guide.
Note: In some regions the lightguide assembly (which includes the lightguide,the metalframe and the
domesheet) will be replaced as one part (this is the preferred procedure). The description below is
needed, when the domesheet needs to be replaced separately, which is not the preferred procedure.
Cleaning
The PWB needs to be cleaned and all remaining material from the old dome sheet needs
to be removed. In some regions there is the possibility to exchange the dome sheet sepa-
rately (not together with the light guide assembly), then the light guide needs to be
cleaned as well.
Placing the dome sheet to the light guide
The dome sheet is delivered on transparency foil. First step is to remove the dome sheet
from the foil, where you need to ensure that the complete dome sheet is lifted and the
protecting foil on the other side of the dome sheet still sticks on the dome sheet. Please
see picture below:
Protecting foil will
stick on dome sheet
All dome sheet parts
are lifted.
(Nothing sticks on
the bottom foil.)
