Samsung SGH-M310 - Page 51

SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
10-13
This Document can not be used without Samsung's authorization
PAM
100
CHECK
pin1
2
≥
-65
dBm
?
10-2.
RF
10-2-1.
EGSM RX
CONTINUOUS RX ON
RF INPUT
:62
CH
AMP
:-50
dBm
NORMAL CONDITION
catch the channel?
CHECK soldered
ANT contact,C130,L101,C100,R100
RFT100
pin
17 : 2.9V ?
PAM
100
CHECK
pin1
7
≥
-65
dBm
?
RFT100 CHECK
pin2
9,30
≥
-65
dBm
?
PAM
100,
RFS
100
resolder or change
PAM
100
resolder or change
RFT100
resolder or change
UCD300 pin
F3, C311,
C312
change or resolder
RFT100 CHECK
pin
19,20
freq
:26
MHz
?
Vp-p
: 380
mV?
OSC
101
change or resolder
RFT100
resolder or change
RFT100
pin
2,3,22,23
Vp-p
: 120
mV
?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
F100
CHECK
pin6
≥
-65
dBm
?
F100
resolder or change
YES
NO
GSM Receiver is O.K?
NO
GSM RX path component
resolder or change
YES
END