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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
3-15
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PAM400
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 ?
U400
pin 17 : 2.8V ?
PAM400 CHECK
pin16
≥
-65dBm ?
U400
CHECK
pin29,30
≥
-65dBm ?
PAM400,RFS400
resolder or change
PAM400
resolder or change
C411,C413,L408
resolder or change
UCP100 pinA13, C114
change or resolder
U400 CHECK
pin 19,20
freq :26MHz ?
Vp-p : 380mV?
OSC400
change or resolder
U400
resolder or change
UCP100
CHECK!!
U400
pin 2,3,22,23 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
F401 CHECK
pin3,4
≥
-65dBm ?
F401
resolder or change
YES
NO