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INTERNAL BLOCK DIAGRAM OF ICs
s LA1831
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ALC AM AM DECODER
AM
MIX RF-AMP STEREO
OSC
AGC MUTE SW
BUFF
STEREO DRIVE
TRIG
AM
AM
DET
IF FF FF FF
LEVEL
AM/FM
DET COMP VCO
IF
S-CURVE BUFF PILOT
AM/FM DET
TUNING SW
FM FM DRIVE PHASE DET
AM
IF DET
FM
GND
REG VCC
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s KIA6289N
3.3