Nokia Mobile Phones NSE-5 Series Service Manual page 80

NSE–5
System Module
Connector
The connector makes a mechanical connection between light guide and
LCD, so the LCD can be clicked onto the light guide. Also it makes
electrical connection between LCD cell and PCB. The connector is not
attached to the PCB, but the 14 pin connector contains springs and makes
the contact.
Light Guide
The Lightguide houses and connects the LCD module to the PCB and
backlights the display. Several snap fits locate the Window and a Board
to Board Connector.
Evenly distributed backlighting is controlled by a graduated etched
pattern. The pattern becomes rougher the further it gets from the LEDs.
This is on the underside, in the visual area. The rest of the Lightguide is
polished to minimise light losses in the system.
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Figure 21. Light guide.
PAMS
Technical Documentation
Issue 1 07/99