LG KU580 Service Manual - Page 83
Touch key Trouble
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4. TROUBLE SHOOTING 4.5.2 Touch key Trouble START Reboot the phone Yes Touch key work well? N o Board to Board CN reconnect (Main : CN501, Sub : CN100) Finish Yes Touch key work well? Finish N o Change Upper case Touch key work well? Yes N o Change Sub board Finish 3355 11 CCNN550011 3366 70 70 < Main Board - Top side > 1 40 CN100 20 21 < Sub Board - Bottom side > LGE Internal Use Only - 84 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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4. TROUBLE SHOOTING
4.5.2 Touch key Trouble
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
Touch key work well?
Finish
START
Yes
Reboot the phone
Board to Board CN reconnect
(Main : CN501, Sub : CN100)
Change Sub board
Touch key work well?
Finish
Yes
N
o
N
o
Touch key work well?
Finish
Yes
N
o
Change Upper case
1
70
35
< Main Board -
Top side >
CN100
1
20
21
40
< Sub Board -
Bottom side >
CN501
35
1
36
70