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Level 3 Repair
8-3-14
. DCS Receiver
RX ON
Cell Power : -60dBm
Yes
PAM100 PIN15
≥ -65dBm
Yes
F101 PIN 1
≥ -68dBm
Yes
UCP200
pin E1 ≥ -70dBm
pin D1 ≥ -70dBm
Yes
Check UCP200
END
V_BATT
C109
C110
STAND_BY
BAND_SEL
PON_PAM
RAMP
R103
EGSM_TX
L109
R104
DCS_TX
R105
R106
No
Resolder RFS100, C142, C143, L124,
No
No
RFS100
C
A
G G
1
2
3
4
L124
C142
C143
C105
L104
R124
C139
F100
C111
GND
22
1 IN1
OUT1 8
VBATT
RX1
11
17
9
RX0
OUT1
18
4
OUT2 6
GPCTRL1
IN2
10
7
GPCTRL0
NC
OUT2
9
19
C113
GND
RF7168
13
TX_EN
NC
8
12
GND
6
VRAMP
GND
7
5
GND
C119
3
GND
GND
24
1
GND
23
GND
21
C121
C122
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C105, L104
Check PAM100
pin10 = H, pin8 = L
pin9 = L
Yes
Resolder C108, C112, L107
SC109
PAM100
C108
DCSRX_N
L107
C112
DCSRX_P
C114
EGSMRX_N
L108
EGSMRX_P
8-30
No
Check ANT Switch
control circuit
Resolder PAM100
R244
L10 7
L108
F100
C111
C113
L104
R124
C109
C110
SC102
L124
C143
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