Samsung SGH-I907 Service Manual - Page 75
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Flow Chart of Troubleshooting 10-7. Bluetooth Working Operate BT Ant103 and L119 O.K? Yes Pin 6 in U101=3.3V Pin5 in U101=1.8V While trying to operate BT Yes Replace MOD100 No Replace or Resolder Ant103 and L119 No Change U101 COMBO_EN VBATT U101 1 VIN VOUT1 6 2 GND 5 3 VOUT2 EN2 EN1 4 GND 7 C199 VCOMBO_3.3V VCOMBO_1.8V C1101 C1102 10-23 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
10-23
This Document can not be used without Samsung's authorization
10-7. Bluetooth Working
Ant103 and
L119 O.K?
No
Yes
Replace or Resolder Ant103 and L119
Change U101
Yes
No
Pin 6 in U101=3.3V
Pin5 in U101=1.8V
While trying to
operate BT
Replace MOD100
Operate BT
7
1
VIN
6
VOUT1
VOUT2
5
U101
4
EN1
EN2
3
GND
2
GND
VCOMBO_3.3V
VCOMBO_1.8V
C1102
C1101
VBATT
C199
COMBO_EN