Samsung GT-i9003 Service Manual page 53

Level 3 Repair
8-3-8. KEY Function (volume key/ power key / touch key)
- volume key
volume key don't operate
press volume up key,
KBC(1), KBR(2) is
Active High ? (V600)
press volume down
key,
KBC(1),KBR(1) is
Active High ? (V601)
PDA PMU key Signal
KBC(1), KBR(1) is
Active High ?
Replace TAC600, TAC601, U807
Yes
Yes
Yes
Yes
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No
replace TAC600
No
replace TAC601
No
replace PDA PMU (U807)
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