User Guide

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-4 Copyright  2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Mechanical damages?
Solder joints OK?
Continue with specific trouble shooting procedure for the module:
If there is an obvious fault, repair it before reflashing the device
Flash first if a fault is not obvious
If flashing is not working go to flashing trouble shooting
Due to CSP packages short circuits or broken solder joints are not easily seen. If the
examined signal seems to be continuously in low or high level, then measure for possible
short circuit to ground (signal low) or to supply voltage (signal high) Note that if a prob-
lem is not found from any visible contact/component it can be under CSPs where the sig-
nal is connected.
Care must be taken when assembling and disassembling the transceiver. Failure to do
this may result in unnecessary damage to device.
Nominal current consumption
NOTE: Service tools need some amount of current to work.
The following current consumption values are measured from a complete NMM-3.
Vbatt = 3.6V
Measured nominal currents are drawn from the main battery.
Measurements have been made with a current probe connected to an oscilloscope.
Operating mode Current consumption
Idle 90 mA
2w audio call (backlights off) 350 mA
Viewfinder 260 mA