Nokia N81 Service Manual

Table of Contents
Camera construction..............................................................................................................................................5–5
Main camera construction.....................................................................................................................................5–5
Secondary camera construction ...........................................................................................................................5–6
Camera viewfinder troubleshooting ....................................................................................................................5–7
Bad camera image quality troubleshooting........................................................................................................5–8
Main camera troubleshooting...............................................................................................................................5–9
Main camera baseband HW troubleshooting................................................................................................... 5–10
Secondary camera troubleshooting .................................................................................................................. 5–11
Secondary camera baseband HW troubleshooting.......................................................................................... 5–12
Flash LED troubleshooting.................................................................................................................................. 5–13
Introduction to flash LED troubleshooting.................................................................................................. 5–13
Flash LED and image taking conditions ....................................................................................................... 5–13
Flash LED construction................................................................................................................................... 5–18
Analysing image quality................................................................................................................................ 5–18
Possible faults in image quality............................................................................................................... 5–18
Testing flash module functionality ......................................................................................................... 5–18
Testing image colours with flash ............................................................................................................ 5–19
Testing flash power .................................................................................................................................. 5–19
Camera flash LED troubleshooting ............................................................................................................... 5–20
Indicator LED troubleshooting........................................................................................................................... 5–21
List of Figures
Figure 43 Camera module cross section and assembly principle......................................................................5–5
Figure 44 Main camera module bottom view including serial numbering......................................................5–5
Figure 45 Front camera module cross section and assembly principle............................................................5–6
Figure 46 Example of a good quality image taken with the flash LED .......................................................... 5–13
Figure 47 overexposed image............................................................................................................................ 5–14
Figure 48 Dark and noisy image ........................................................................................................................ 5–15
Figure 49 Shaken image ..................................................................................................................................... 5–16
Figure 50 Camera white balance failure and overexposure ........................................................................... 5–17
Figure 51 Color difference between flash colour limit samples..................................................................... 5–17
Figure 52 Mechanical construction of the flash LED module .......................................................................... 5–18
RM-179; RM-223
Camera Module Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 5 –3
Copyright © 2007 Nokia. All rights reserved.

Nokia N81 Specifications

General

Display diagonal	2.4 \
Display resolution	240 x 320 pixels
Display number of colors	16.78 million colors
Ringer type	Polyphonic
Internal memory	8196 MB
Front camera type	Single camera
Rear camera resolution	1600 x 1200 pixels
Personal info management (PIM)	Alarm clock, Calculator, Calendar, Notes, To-do list
Headphone connectivity	3.5 mm
USB 2.0 ports quantity	1
Text prediction system type	T9
Multimedia Messaging Service (MMS)	Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network
Form factor	Slider
Product color	Brown
Gaming time	6 h
Browsing time	5 h
Talk time (2G)	4 h
Talk time (3G)	3 h
Battery capacity	1050 mAh
Standby time (2G)	1020 h
Continuous audio playback time	11.5 h
Continuous video playback time	4.5 h
2G standards	GPRS
Data network	wcdma
Bluetooth version	2.0+EDR
Bluetooth profiles	A2DP, BIP, DUN, FTP, GAP, GOEP, HFP, HSP, OPP, SPP
SIM card capability	Single SIM

Weight and Dimensions

Depth	102 mm
Width	50 mm
Height	17.9 mm
Weight	140 g