Samsung SGH-X300 Service Manual page 18
Samsung mobile phone service manual
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Also See for SGH-X300:
- User manual (77 pages) ,
- Owner's instruction book (119 pages) ,
- Owner's instruction book (119 pages)
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SGH-X300 Flow Chart of Troubleshooting
2-2-2. DCS Rx
CONTINOUS RX ON
RF INPUT : 698CH
AMP : -50dbm
Normal condition
catch the
channel ?
Yes
Check U102
pin 12 ¡ Ã
-65
dbm ?
Yes
Check U102
pin 18 ¡ Ã
dbm ?
Yes
Check U101
pin 19,20 ¡ Ã -
65dBm ?
Yes
Check U101
pin 13 = 2.9V
Yes
Resolder or change
U300
-65
No
Check
ANT,R101,R102,C104,L102
No
Resolder or change
CN100, L101, L102, C100, C105, C106
No
Resolder or change
No
Resolder or change
No
Resolder or change
2-14
U102
F100
U200
1
2
3
4
5
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