Dcs Receiver - Samsung SGH E590 - Cell Phone 70 MB Service Manual

9-15. DCS Receiver

RX ON
Cell Power : -60dBm
Yes
F100 Pin13
≥ -65dBm
Yes
F100 3,4
≥ -68dBm
Yes
U101
pin 22 ≥ -70dBm
pin 23 ≥ -70dBm
Yes
U101 pin 4,5,6,7
≥ 0.2Vp_p
Yes
Check U200
END
No
Resolder CN100,C101,L104
No
No
Resolder C102, C103, L105
No
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Check F100
pin9,pin11 = L
Yes
U101pin11,12,16,17,
29,32,33,36 ≥2.8V
pin 10≥1.8V
Yes
9-27
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Resolder F100
No
Check & Resolder
C121,C124,C126
And PMU Part
Resolder U101