Hw Keys; Upper Block; Lower Block - Nokia RX-44 Service Manual

RX-44
System Module

HW keys

Upper block

The upper block HW keys (Home, Back) are located in main flex, which is connected to the main PWB with a
64-pin board-to-board connector.

Lower block

Top left corner of the device has 5 HW keys, full screen, volume up, volume down, power and device lock key.
These keys are connected to engine PWB through topflex assembly 10-pin board-to-board connector.
Engine pwb implements full Qwerty keyboard, 5-way rocker and Menu key.
All the keys (except power and lock key) are on matrix. The key matrix has eight rows and twelve columns,
which is connected to the LM8323 integrated keyboard controller.
Power button is connected directly to AVilma and Lock key is connected directly OMAP2420POP GPIO102.
Ref
S1000
S1001
V1001 RGB led
N1000
X1002 Camera connector
X1001 Display Connector
X1003 Main Flex connector
Issue 1
Name
Home
Back
50, 51, 53
ALS See schematics
See schematics
See schematics
See schematics
COMPANY CONFIDENTIAL
Copyright © 2007 Nokia. All rights reserved.
Table 14 Main flex keys
Pin No.
54
55
Page 7 –11