Nokia 5140 Manuales De Servicio

NPL-4/5

Company confidential 

Troubleshooting Instructions

Nokia Customer Care

Page 20

Copyright © 2004 Nokia Corporation. All rights reserved.

Issue 1 05/04

Measuring with an oscilloscope on “RXIINN”, (

R421) or “RXQINN”, (R423) is recom-

mended only if RSSI reading does not provide enough information. Input level = -60dBm.

- Start Phoenix Service Software and open FBUS connection.

- Select → Scan Product (Ctrl-R)

Wait until phone information is shown in the lower right corner of the screen.

- Set operating mode to “local mode”

- Select → Testing → RF Controls

Wait until the RF Controls window is popped up.

- Select → Band →GSM 850 or GSM 900 or GSM1800 or GSM1900

Active unit → RX

Operation mode → 

RX/TX Channel  → 190 or 37 or 700 or 661

AGC → 12

Following diagram should be displayed on an oscilloscope' s screen if the GSM 900 
receiver is working properly: