Gsm Transmitter - Samsung SGH-E700 Service Manual

13. GSM Transmitter

TXO N (5L evel)
Y es
F101 Pin8
>= 20dBm
N o
F101 pin5
>= 20dBm
N o
PA M 100 pin9
>= 20dBm
N o
PA M 100 pin7
>= -11dBm
N o
V C O 101 pin1
>= -8dBm
N o
U 100 pin5, 6, 7, 8
>= 500m V
C heck U C P200
E N D
Y es
R esolder R FS100, C 100
Y es
Y es
R esolder L 105, C 114
Y es
Y es
R esolder R 107, R 108, R 109
Y es
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SG H- E 700 F low Chart of Troubleshooting
C heck F101
pin11 = H(2.68V ),
pin2 = L
N o
Y es
C heck PA M 100
+V BA TT, pin4, 7
O K ?
N o
Y es
C heck U 100
pin 26>=-20dB
&pin11>=2V
O K ?
N o
C heck U 100 pin
2,12,4,23>=2.7V
O K ?
Y es
R esolder U 100
7- 18
Y es
C hange or R esolder F101
C heck A N T Switch
control circuit
R esolder or C hange PA M 100
C heck +V BA TT or PA M
control signal
C heck &R esolder R FL O
signal, R F13M H z,
R F PSU Part