Keyboard Troubleshooting - Nokia 6120 classic Service Manual

RM-243
BB Troubleshooting and Manual Tuning Guide

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, rust).
• 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.
Troubleshooting flow
Issue 1 COMPANY CONFIDENTIAL
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