Secondary Camera Construction - Nokia n81 Service Manual

RM-179; RM-223
Camera Module Troubleshooting
The camera module uses socket type connecting. For versioning, laser marked serial numbering is used on
the PWB.
The main parts of the module are:
• Lens unit including lens aperture.
• Infrared filter; used to prevent infrared light from contaminating the image colors. The IR filter is glued
to the EMI shielded camera body.
• Camera body; made of conductive metallized plastic and attached to the PWB with glue.
• Sensor array including DSP functions is glued and wire-bonded to the PWB.
• PWB, FR-4 type
• Socket type connection
• Laser-marked serial numbering on PWB (for versioning)
• Passive components
• Camera protection window; part of the phone cover mechanics
• Dust gasket between the lens unit and camera protection window

Secondary camera construction

The camera module as a component is not a repairable part because it is soldered on LID PWB. To exchange
front camera module the whole LID PWB has to be exchanged. Cleaning dust from the front face is allowed
only. Use clean compressed air.
The front camera module is constructed from 3 major components: lens unit, sensor and shield plate. The
lens unit includes the lens holder, lens, aperture and IR-cut glass. Sensor is glued on lens holder. Both are
covered with the shield plate. It also includes the module marking (1pin position).
Figure 45 Front camera module cross section and assembly principle
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