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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 AMP
in/output OK?
Check IF filter
solderling
Check AGC AMP
in/output OK?
Check 2nd
local & AGC control
voltage OK?
Check PLL
& BBA #80
RF Rx FM OK
Check Duplexer
& LNA power
Yes
Yes
Yes
Yes
Yes
Yes
BBA INPUT: -52dBm
Gain: +, -45dB
Loss: -9dB
Gain(FM): +25dB
Gain(FM): -8dB
Gain: +20dB
VCO_OUTPUT: -3dBm
BUFFER OUTPUT: +5dBm
local: -4~0dBm
170.76MHz
Yes
Yes
No
No
No
No
No
No
No