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Flow Chart of Troubleshooting
9-2.RF
9-2-1. EGSM RX
NORMAL CONDITION
catch the channel?
YES
F700 CHECK
pin13 ≥ -65dBm ?
YES
F700 CHECK
pin5,6 ≥ -65dBm ?
YES
U701 CHECK
pin6,7 ≥ -65dBm ?
YES
U701
pin 34 : 2.9V ?
Pin1,13,22,32 : VBAT?
YES
U701 CHECK
pin 21 : 26MHz ?
Vp-p 1.1V?
YES
U701
pin 35,36,37,38
Vp-p : 100mV ?
YES
U701
resolder or change
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NO
CHECK
R722
contact ?
NO
L700,C700
resolder or change
NO
F700
resolder or change
NO
L702,L703,C709
resolder or change
NO
U100, C110
change or resolder
NO
OSC 700
change or resolder
NO
U100
CHECK!!
9-10
CONTINUOUS RX ON
RF INPUT : 30CH
AMP : -50dBm
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