Nokia N81 Service Manual

Table of Contents
Troubleshooting overview ....................................................................................................................................3–5
Dead or jammed device troubleshooting............................................................................................................3–6
General power checking ........................................................................................................................................3–7
Clocking troubleshooting ......................................................................................................................................3–8
Charging troubleshooting .....................................................................................................................................3–9
Backup battery troubleshooting........................................................................................................................ 3–10
Flash programming fault troubleshooting....................................................................................................... 3–11
Combo memory troubleshooting ...................................................................................................................... 3–13
MicroSD card troubleshooting............................................................................................................................ 3–14
EMMC troubleshooting ........................................................................................................................................ 3–16
USB interface troubleshooting........................................................................................................................... 3–18
SIM card troubleshooting ................................................................................................................................... 3–20
Hall sensor troubleshooting............................................................................................................................... 3–22
WLAN interface troubleshooting ....................................................................................................................... 3–23
Keyboard troubleshooting ................................................................................................................................. 3–24
NaviWheel troubleshooting ............................................................................................................................... 3–26
Power key troubleshooting................................................................................................................................ 3–27
Vibra troubleshooting......................................................................................................................................... 3–28
Display module troubleshooting ....................................................................................................................... 3–29
General instructions for display troubleshooting....................................................................................... 3–29
Display troubleshooting ................................................................................................................................ 3–30
LED driver troubleshooting ........................................................................................................................... 3–31
Power LED troubleshooting .......................................................................................................................... 3–35
Bluetooth and FM radio ...................................................................................................................................... 3–37
Introduction to Bluetooth/FM Radio troubleshooting ............................................................................... 3–37
Bluetooth settings for Phoenix..................................................................................................................... 3–37
Bluetooth self tests in Phoenix..................................................................................................................... 3–38
Bluetooth troubleshooting ........................................................................................................................... 3–40
FM radio troubleshooting.............................................................................................................................. 3–41
Audio troubleshooting........................................................................................................................................ 3–41
Audio troubleshooting test instructions...................................................................................................... 3–41
Internal earpiece troubleshooting ............................................................................................................... 3–45
Internal microphone troubleshooting......................................................................................................... 3–46
IHF speakers troubleshooting....................................................................................................................... 3–47
External microphone troubleshooting......................................................................................................... 3–48
External earpiece troubleshooting............................................................................................................... 3–49
Acoustics troubleshooting............................................................................................................................. 3–50
Introduction to acoustics troubleshooting ............................................................................................ 3–50
Earpiece troubleshooting......................................................................................................................... 3–51
IHF troubleshooting.................................................................................................................................. 3–52
Microphone troubleshooting ................................................................................................................... 3–53
Baseband manual tuning guide......................................................................................................................... 3–54
Certificate restoring for BB5 products.......................................................................................................... 3–54
Energy management calibration.................................................................................................................. 3–60
List of Tables
Table 2 Display module troubleshooting cases................................................................................................ 3–29
Table 3 Pixel defects ........................................................................................................................................... 3–29
Table 4 Calibration value limits ......................................................................................................................... 3–60
RM-179; RM-223
Baseband Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 3 –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