
SAMSUNG Proprietary-Contents may change without notice
6-7
Troubleshooting
6-3 Receiver Section
RX part
Check CDMA
SVC&ROAM?
Check LNA
in/output OK?
Check mixer
in/output OK?
Check IF AMP
in/output OK?
Check 1st
local & mixer power
OK?
Check IF AMP
power OK?
Check PLL (U407)
& VCO output
Check IF filter
in/output OK?
Check IF filter
solderling
RF Rx FM OK
Check Duplexer
& LNA power
Yes
Yes
Yes
Yes
Yes
BBA INPUT: -52dBm
Loss: -10dB
Gain: +19dB
Gain: -11dB
Gain: +18dB
VCO_OUTPUT: -3dBm
BUFFER OUTPUT: +5dBm
local: +5dBm
Yes
No
No
No
No
No