keypad problem solution

Key pads solution
part 1
1 CPU to key pad
2 CPU to carrier to key pad
3 combined resistance to key pad
4 CPU to carrier plus protector IC to key pad
5 CPU to carrier plus protector IC key pad connector Patta

part 2
1 income calls okay but total keypad hank
2 single track not working
3 miss working and auto working

** key pad problem solution
1 clean tips and cool testing
2 side key disconnect then check
3 key pad washer disconnect then check
4 keypad IC punch or change
5 clean tips and cool testing
on keypad output tips

open conditions solution
1 carrier plus protector IC punch
2 check carrier plus protector IC
3 check tips
4 check track
5 working IC HRC

short conditions solution

1 carrier plus protector IC punch then check
2 check tips
3 check track
4 working IC HRC

okay conditions solution

1 mother board wash and hit
2 sides key disconnect then check
3 carrier plus protector IC punch and change
4 keypad washer disconnect
5 check solution with Google search
6 CPU HRC

** signal track not working solution

1 clean tips and tikly
2 check output tips with cool testing

»open conditions
»short conditions
»okay conditions

** Auto / miss working

1 keypad IC punch or change
2 side key disconnect then check
3 mother board wash and hit
4 clean tips and cool testing on output tips

»open conditions
»short conditions
»okay conditions