Poor tactility for functional keys.pdf

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CONFIDENTIAL
1 (2)
Customer and Market Operations
EMEA Customer Care
Service Bulletin No. SB-012/22.12.05
RM-51
POOR TACTILITY FOR FUNCTIONAL KEYS
The keymat has been modified to avoid poor tactility for functional keys. Also
UI PWB has been modified to support the new version of keymat.
Keymat:
The plunger has been extended by 0.2 mm in new keymat version.
Currently there are two keymat versions available. These keymats are
marked with three different version markings (version 3 is physically identical
to version 4, except the version marking).
Keymat versions:
Version
2
3
4
Description
Original version
Plunger has been extended by 0.2 mm
Plunger has been extended by 0.2 mm
The version of the keymat can be found from the back of the keymat as
shown in the picture below:
UI PWB:
To prevent the plunger extending to interfere to joy-stick operation, the UI
PWB has been updated. The joystick knob in UI PWB has been raised by 0.2
mm.
x
Level 1
x
Level 2
x
Level 3
x
Level 4
Ref.
RM-51 SB-012
Copyright © Nokia Corporation 2005
CONFIDENTIAL
2 (2)
UI PWB versions:
Version
A
B
C
Description
Original version
Display adhesive added
Joystick knob has been raised by 0.2 mm
The version of the UI PWB can be found on the top of the front side of the UI
PWB as shown in the picture below:
UI PWB version
marking A, B or C
In a few cases the joystick might interfere with the keymat. It is caused by
tolerance stack-up and it can happen when combining ‘old’ version of the UI
PWB and new version of keymats. The situation is illustrated in the table
below in combinations marked with
‘CHECK’.
Keymat
version 2
OK
OK
OK
Keymat
version 3
CHECK
CHECK
OK
Keymat
version 4
CHECK
CHECK
OK
UI PWB version A
UI PWB version B
UI PWB version C and newer
The tactility for the functional keys and the joystick has to be checked, if
keymat is replaced and in case that the joystick interferes with the keymat,
the UI PWB (0263747) needs to be replaced with version C or newer.
x
Level 1
x
Level 2
x
Level 3
x
Level 4
Ref.
RM-51 SB-012
Copyright © Nokia Corporation 2005

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