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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
3-15
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PAM300
CHECK
pin12
≥
-65dBm ?
3
-2.RF
3-2-1. EGSM RX
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT
contact ?
U300
pin 17 : 2.8V ?
PAM300 CHECK
pin16
≥
-65dBm ?
U300
CHECK
pin29,30
≥
-65dBm ?
PAM300,RFS300
resolder or change
PAM300
resolder or change
C319,C322,L306
resolder or change
UCP101 pinA13,
C115
change or resolder
U300 CHECK
pin 19,20 :
26MHz ?
Vp-p :380mV?
OSC300
change or resolder
U300
resolder or change
UCP101
CHECK!!
U300
pin 2,3,22,23 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
①
③
②
④
⑤
⑥
⑦
⑧
F301 CHECK
pin3,4
≥
-65dBm ?
F301
resolder or change
YES
NO