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2.rf, 2-1. egsm rx – Sharp SGH-C130 User Manual

Page 50

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SAMSUNG Proprietary-Contents may change without notice

Flow Chart of Troubleshooting

10-16

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PAM100

CHECK

pin12 ≥ -65dBm ?

10-2.RF

10-2-1. EGSM RX

CONTINUOUS RX ON

RF INPUT : 62CH

AMP : -50dBm

NORMAL CONDITION

catch the channel?

CHECK

ANT

contact ?

U102

pin 12,13,25,26,27:

2.8V ?

PAM100 CHECK

pin16 ≥ -65dBm ?

U102

CHECK

pin21,22 ≥ -65dBm ?

PAM100,RFS100

resolder or change

PAM100

resolder or change

C105,C109,L104

resolder or change

U107 pinA13, C172

change or resolder

U102 CHECK

pin 30,31 :

26MHz ?

Vp-p : 950mV?

OSC100

change or resolder

U102

resolder or change

U107

CHECK!!

U102

pin 4,5,6,7 Vp-p

: 120mV ?

NO

YES

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

F101 CHECK

pin3,4 ≥ -65dBm ?

F101

resolder or change

YES

NO