Samsung SGH-X680 Service Manual page 53

UCP101
4
U401 (SAPA1D1)
C403 R404
AMP_IN_N
C404 R405
AMP_IN_P
AMP_EN
C406 C407
UCP201
3
VBAT
13
17 16 15 14
18 NC
19 NC 12
VOM
1
VREF
VSS 11
2
U401
VIM
VSS 10
3
VIP
9
VOP
4
EN
5 6 7 8
R410
C408 C409
R403
AMP_OUT_N
R406
AMP_OUT_P
C452 R447 R448
C453
C410
10-16
Flow Chart of Troubleshooting
5