Samsung SGH-F860V, Руководство по обслуживанию

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Mobilchips
SGH-E860V Flow Chart of Troubleshooting
2- 21
2-2-1. GSM Rx
Normal condition
catch the
channel ?
Check F100
pin 6 ≥ -65
dbm ?
Check U101
pin 20,21 ≥ -
65dBm ?
Yes
No
No
Check F100
pin 10,11 ≥ -65
dbm ?
Yes
No
Yes
Check ANT, C112,144,L100
Resolder or change
CN100, C109
Resolder or change
F100
Resolder or change
C114,115,L101
Resolder or change
U200
CONTINOUS RX ON
RF INPUT : 62CH
AMP : -50dbm
Check U101
pin 32 = 2.8V
Yes
Resolder or change
U401
Yes
No
No
2-2 RF