Samsung SCH-211 Service Manual page 44

6-2 Receiver Section
6-2-1 FM Mode
Start FM mode.
Check FM 12dB
SINAD OK?
Y
Samsung Electronics-Contents may change without notice.
N
Check LNA
in/output OK?
(Gain: +16dB)
Y
Check mixer
in/output OK?
(Gain(FM): +3dB)
Y
Check IF filter
in/output OK?
(Loss: -5dB)
Y
Check AGC amp
in/output OK?
(Gain: +,-45dB)
Y
RF RX FM OK.
(BBA INPUT: -52dBm)
N
Check Duplexer
& LNA power.
Y
Check 1st
N
local & mixer power
OK?
(969.96MHz
Local: 0~+1dBm)
N
Check IF filter
soldering.
Y
Check 2nd
N
local & AGC control
voltage OK?
(170.76MHz)
Troubleshooting
N
Check PLL(U305)
& VCO output.
(VCO_OUTPUT: -6~0dBm)
N
Check PLL(U402)
& BBA #80.
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