Nokia RM-243 Service Manual

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
RM-243
BB Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 3 –19
Copyright © 2007 Nokia. All rights reserved.

Nokia RM-243 Specifications

General

Brand	Nokia
Model	RM-243
Category	Handhelds
Language	English