Samsung SGH-V205 Service Manual page 29

11. DPCS transmitter
NO
U1005 pin 10 :
about 2~3 dBm?
YE S
CN1001, C1000
NO
check&change
C1014 : 3.7 V?
YE S
Between
R1008& U1001
:1.2V?
YE S
NO
R1005:
≒ -5dBm ?
YE S
C1016 : 3V?
YE S
U1001
change or resolder
NO
U901
pin9,10,12,13
U100 pin46,C114
:-20dBm ?
change or resolder
YE S
NO
U901
pin5,6,7,8 :1.7V ?
YE S
U700
U1001
change
change or resolder
SGH-V205 Flow Chart of Troubleshooting and Circuit Diagrams
NO
U1005
pin5 : 2.8 V?
YE S
Between
U1005&L1003:
YE S
U1005
check & change
NO
BATTERY, U100
check & change
NO
NO
U700
check
U901
pin14,23,26,32 :
2.8V ?
YE S
NO
U902pin5,25,28
: 3V ?
YE S
U902
pin 7 : 13MHz?
Vp-p: 950mV
YE S
U902
pin9,10,11,1213
: 3V?
YE S
U901
change or resolder
SAMSUNG Proprietary-Contents may change without notice
U702,U703
check & change
NO
R1008
U100pin44, C115
check & change
YE S
NO
U100 pin39,C116
change or resolder
NO
NO
U700
check or change
6-11
CONTI NUOUS TX ON CONDITION
CH : 698CH(DCS),660CH(PCS)
TX POWER CODE: 350 CODE Aplied
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
check & change
U700
check
NO
OSC801
pin 3 : 13MHz?
change or resolder
Vp-p : 950mV
YE S
NO
OSC801
U100 pin39,C116
pin 4 : 3V ?
change or resolder
YE S
U902
change or resolder
OSC801