Samsung SGH-M310 - Page 52

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Flow Chart of Troubleshooting
10-14
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PAM
100
CHECK
pin
13
≥
-65
dBm
?
10-2-2.
DCS RX
CONTINUOUS RX ON
RF INPUT
: 698
CH
AMP
:-50
dBm
YES
NORMAL CONDITION
catch the channel?
CHECK soldered
ANT contact,C130,L101,C100,R100
RFT100
pin
17 : 2.8V ?
PAM
100
CHECK
pin
17
≥
-65
dBm
?
RFT100 CHECK
pin
27,28
≥
-65
dBm
?
PAM
100,
RFS
100
resolder or change
PAM100
resolder or change
RFT100
resolder or change
UCD300 pin
F3, C311,
C312
change or resolder
RFT100 CHECK
pin
19,20 :
26
MHz
?
Vp-p
: 380
mV?
O
SC100
change or resolder
RFT100
resolder or change
RFT100 pin
2,3,22,23
Vp-p
: 120
mV
?
NO
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
F100
CHECK
pin3
≥
-65
dBm
?
F100
resolder or change
YES
NO
NO
DCS Receiver is O.K?
YES
END
NO
GSM RX path component
resolder or change