User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 105
Issue 1 06/01
3.5 DL2 related keyboard problems
1. Check the 50–way connector solderings and general condition
2. Check PDA softkey switches S250, S251, S260, S261
3. Check keyboard line capacitors C250–C263 (14 pieces) for shorts
and breakages
4. Check the key pads for short circuits or dirt. Measure the resistance
of each row against all columns and all rows and columns against ground. (Dis-
connect the 50–way connector first). Result should be > 1Mohm for all com-
binations.