User Guide

Keyboard troubleshooting

Context

There are two possible failure modes in the keyboard module: a) One or more keys can be stuck, so that the

key does not react when a keydome is pressed. This kind of failure is caused by mechanical reasons (dirt,

rust), b) Malfunction of several keys at the same time; this happens when one or more rows or columns are

failing (shortcut or open connection).

For a more detailed description of the keyboard and keymatrix, see section Keyboard. If the failure mode is

not clear, start with the Keyboard Test in Phoenix.

RM-170; RM-171

Nokia Customer Care BB Troubleshooting and Manual Tuning Guide

Page 6 –22 COMPANY CONFIDENTIAL Issue 1