El Power Supply For Touchpad Module; Touchpad And Flip Module Keypads - Nokia RH-6 Series Baseband Description & Troubleshooting

RH-6
6 - BB Description & Troubleshooting
nal resistor (R307). The supply is VBAT.

EL power supply for touchpad module

The EL illumination is implemented in touchpad module. The driver with surrounding
components is assembled into flexi close the EL sheet to keep the audible - and electrical
noise as low as possible.
ELEN

Touchpad and flip module keypads

The RN-4 consists of two separate touchpad and flip modules, which include contacts
for the keypad domes and LED's for keypad lighting. The touchpad module is connected
to the main board with 24-pin male-female connector and the flip module uses the same
10-pin connector as the UI board.
5x4-matrix keyboard is used in RH-6. Key pressing is detected by scanning procedure.
Keypad signals are connected UPP keyboard interface.
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Figure 14. Flip LED driving
© 2003 Nokia Corporation.
CCS Technical Documentation
Issue 1 10/2003