Transceiver Troubleshooting; General About Testing; Phone Operating Modes - Nokia NPM-2NX Troubleshooting Manual

NPM-2NX
Troubleshooting

Transceiver Troubleshooting

General about testing

Phone operating modes

Phone has three different modes for testing/repairing phone. Modes can be selected with
suitable resistors connected to BSI- and BTEMP- lines as following:
Mode BSI- resistor
Normal 68k
Local 560_ (<1k_)
Test 3.3k (> 1k)
The MCU software enters automatically to local or test mode at start-up if correspond-
ing resistors are connected.
Note! Baseband doesn't wake up automatically when the battery voltage is connected
(normal mode). Power can be switched on by
• Pressing the power key
• connecting a charger
• RC-alarm function
In the local and test mode the baseband can be controlled through MBUS or FBUS (FBUS
is recommended) connections by a Phoenix service software.
Page 4
Table 1: Mode selection resistors
BTEMP- resistor Remarks
47k
What ever
560_ (<1k_) Recommended with baseband testing. Same as
local mode, but making a phone call is possible.
ãNokia Corporation
CCS Technical Documentation
Issue 1 07/02