SAMSUNG Proprietary-Contents may change without notice
Level 3 Repair
8-28
This Document can not be used without Samsung's authorization
8-3-8. KEY Function (volume key/ power key)
- volume key
volume keys don't operate
No
Yes
replace VOL_UP
replace VOL_DOWN
Yes
No
press volume down
key,
KBC(1),KBR(1) is
Active Low ?
Replace TAC401, TAC402, U501
replace PMIC (U501)
Yes
No
PMU key Signal
KBC(1), KBR(1)
is
Active Low ?
press volume up key,
KBC(1), KBR(2) is
Active Low?
Yes