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Transmitter Section - Samsung SCH-A399 Service Manual

Portable cellular telephone
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5-3 Transmitter Section

Transmitter section.
NO
NO
NO
NO
Check RFT3100
Trouble shooting
Ablormal
RF OUT Leve l
OK?
CDMA:+8dBm
YES
YES
YES
YES
Check
PA(U301)
Output Level
OK?
CDMA:+25dBm
NO
NO
NO
NO
NO
NO
NO
NO
Check PLL
OK?
NO
NO
NO
NO
Check RFT3100
pin 19
YES
YES
YES
YES
RF_LO Level
(-3dBm)
5-7

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