Keypad Problems - Nokia 5510 NPM-5 Service Manual

Nokia Mobile Phones Customer Care E&A
Technical Services, Repair Concepts

5.5 Keypad problems

Service Manual 5510 Level 2
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No
Service Center
PAGE 19 (34)
Confidential
Keypad
problem
Change
corresponding
keymat I002 or
I003
ok ? Yes
No
Clean the UI
module (MU4,
top side)
ok ? Yes
No
Change the
light guide
I008
ok ? Yes
No
Check and
clean pads of
board to board
Connector
(MA4, top
side)
Check spring
contacts of
- connection
board to board
- optical condition
Connector
- mech. condition
J301 (MU4,
- corrosion
botttom side
ok ? Yes
No
Change UI
module MU4
I017
ok ? Yes
Copyright 2001 © Nokia Mobile Phones
Approved 1.0
SQX 00306-en MWy
20.11.2001
End