LG GX200 - Page 94

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4.13.3 Checking Flow
Start
Check status of
SW1,SW2,SW3 Key pad
function ?
NO
Check status of
V1404,V1405,V1406 , J1401
soldering work properly ?
NO
Re-solder or replace
V1404,V1405,V1406
, J1401 and try again
YES
Check status of Key board
Key pad function ?
NO
YES
Check status of Key board
Key pad function ?
NO
YES
Enter the Engineer Mode and
set Key pad function on
Change new
Sub Key Board
and try again
Re-solder or replace
CPU(U401)
and Key around
Component and try
again
Re-solder or replace
SW1,SW2, SW3 and
around Component and
try again
Keyfunction work
properly
Check status of Key board
Key pad function ?
NO
YES
YES
Change new Metal of
MB PCBA