User Guide

Figure 46 L6300 Wlan SMPS coil

Keyboard troubleshooting

Context

There are two possible failure modes in the keyboard module:

• 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, corrosion).

• 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-100

BB Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 2 COMPANY CONFIDENTIAL Page 6 –33