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INTERNAL BLOCK DIAGRAM OF ICs
LA1831
24 23 22 21 20 19 18 17 16 15 14 13
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
1 2 3 4 5 6 7 8 9 10 11 12
KA3082
1 2 3 4 5 6 7 8 9
REC SW GND P/B SW CONT GND VCC P/B SW GND REC SW
KIA6289N
3.3