Nokia N81 Service Manual

Min Typ Max Unit
Ch. 37 / 942.46771 MHz -2 0 2 dB
Ch. 90 / 953.06771 MHz -2 0 2 dB
Ch. 114 / 957.86771 MHz -3 0 2 dB
Ch. 124 / 959.86771 MHz -3 0 2 dB
Ch. 136 / 962.26771 MHz -6 -1 2 dB
GSM1800
Ch. 497 / 1802.26771 MHz -6 -1 3 dB
Ch. 512 / 1805.26771 MHz -3 0 3 dB
Ch. 535 / 1809.86771 MHz -3 0 3 dB
Ch. 606 / 1824.06771 MHz -3 0 3 dB
Ch. 700 / 1842.86771 MHz -3 0 3 dB
Ch. 791 / 1861.06771 MHz -3 0 3 dB
Ch. 870 / 1876.86771 MHz -3 0 3 dB
Ch. 885 / 1879.86771 MHz -3 0 3 dB
Ch. 908 / 1884.46771 MHz -6 -1 3 dB
GSM1900
Ch. 496 / 1927.06771 MHz -6 -1 2 dB
Ch. 512 / 1930.26771 MHz -3 0 2 dB
Ch. 537 / 1935.26771 MHz -3 0 2 dB
Ch. 586 / 1945.06771 MHz -3 0 2 dB
Ch. 661 / 1960.06771 MHz -3 0 2 dB
Ch. 736 / 1975.06771 MHz -3 0 2 dB
Ch. 794 / 1986.66771 MHz -3 0 2 dB
Ch. 810 / 1989.86771 MHz -3 0 2 dB
Ch. 835 / 1994.86771 MHz -6 -1 2 dB
12. If the values are within the limits, click Next to continue to the next band.
Next actions
Repeat the steps 8 to 12 for GSM1800 and GSM1900.
GSM transmitter tunings
Tx IQ tuning (GSM)
Context
The Tx path branches to I and Q signals at RF I/Q modulator. Modulator and analog hardware located after
it cause unequal amplitude and phase disturbance to I and Q signal paths. Tx IQ tuning balances the I and Q
branches.
RM-179; RM-223
RF troubleshooting
Page 4 –38 COMPANY CONFIDENTIAL Issue 1
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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