Nokia N81 Service Manual

Non-replaceable RF components
C7547 T7502 C7519 Z7580
N7541 L7590 C7520 Z7600
L7540 C7590 C7580 C7524
C7521 Z7582 C7582 L7526
L7529 L7502 C7581
General voltage checking
Steps
1. Set up the main board in the module jig. The phone should be in local mode.
2. Check the following:
# Signal name Test point Voltage (all bands)
1 VCTOXO supply R7501 2.5 V
2 Ahneus supply from Dc/Dc
conv.
C7590 3.2 V
3 FEM supply L7510 3.9 V
4 WCDMA PA supply from
Dc/Dc conv.
C7543 0 V (minimum 1.3 V
when transmitting)
5 Vbat at WCDMA PA C7547 3.9 V
6 Supply input to DC/DC
conv (N7590)
L7592 3.9 V
* With these settings, the result should be 1.3 V.
RM-179; RM-223
RF troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –9
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