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SAMSUNG Proprietary-Contents may change without notice
8-7
Trouble Shooting
8-2 Receiver Section
8-2-1 AMPS mode
(Gain: +20dB)
(Gain(AMPS): +10dB)
(Local:0dBm)
(Loss: -5dB)
(When RX Input Level is -90 dBm,
RSSI displays 40-60 in test mode 01,090363,75)
(IFR input: -30dBm)
(VCO output: -6dBm)
Start AMPS mode.
Check
AMPS 12dB SINAD
OK?
Check LNA
in/output OK?
Check Duplexer
& LNA power.
Check MIXER
in/output OK?
Check IF Filter
in/output OK?
RSSI OK?
RF RX AMPS OK.
Check PLL(U204)
& IFR #25.
Check 2nd
local OK?
Check IF Filter
soldering.
Check PLL(U204)
& VCO output.
Check 1st
local & mixer power
OK?
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO