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5. INTERNAL BLOCK DIAGRAM OF ICS
IC101 DBL 1018 (FM IF)
IF Quad V
vcc Out In ref
12 9 11 13
VOLTAGE
REGULATOR AFC
CLAMF 7 AFC
IF Input 1 1st 2nd 3rd 4th 5th 6th OUAD OUADRATURE
Amp Amp Amp Amp Amp Amp LIMITER DETECTOR
2
Bias
3
AF AF
8 Output
MUTE
Amp 5 Mute
LEVEL LEVEL LEVEL HOLE DC LEVEL Attenuation
INVERTER Adjust
DETECTOR DETECTOR DETECTOR DETECTOR DETETOR
GND 4
SIGNAL
AGC MUTE
METER
DRIVE DRIVE
DRIVE
16 15 14 10 6
AGC Signal Mute GND Mute
Meter Drive Input
Output
IC201 DBL 1019 (MW RF & IF)
Local OSC Local Local IF Signal Signal Detector Detector
Butter Out OSC2 OSC1 AGC Meter Out Meter In V Out GND In
CC
20 19 18 17 16 15 14 13 12 11
IF
DETECTOR
LOCAL
LOCAL IF SIGNAL
OSC
OSC AGC METER
BUFFER
ALC
RF DETECTOR
IF
RF ATTENUATOR MIX
RF RF AMP
AGC DRIVER
AMP2 AMP2
1 2 3 4 5 6 7 8 9 10
RFAGC RFAmp2 RF ANT Damping GND MIX in & MIX VCC IF Amp IF Amp
Out In AGC Driver RF AMP1 In Out In Out
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IC301 KIA6043S (FM MPX)
L.P.F-1 VCO ADJUSTMENT
6.6V 7.1V
2 4
1 AF PHASE DC
INPUT DETECTOR VCO 76kHz 1/2 1/2
3.5V
19kHz<90
PILOT TRIGGER STEREO
DETECTOR SWITCH 1/2
19kHz<0
STEREO STABILZED
DECODER 38kHz POWER SUPPLY
4V 4V 7.4V
8 9 7 6 5 3
LEFT RIGHT L.P.F-2 GND
0V 8V
SW2
LED
SW1 COUNTER
38kHz CHECK V
OUTPUT CC
FC
SW1 VCO STOP SWITCH
SW2 38kHz MONITOR SWITCH
IC401 KIC9256P (PLL)
L.P.F-1 VCO ADJUSTMENT
6.6V 7.1V
2 4
1 AF PHASE DC
INPUT DETECTOR VCO 76kHz 1/2 1/2
3.5V
19kHz<90
PILOT TRIGGER STEREO
DETECTOR SWITCH 1/2
19kHz<0
STEREO STABILZED
DECODER 38kHz POWER SUPPLY
4V 4V 7.4V
8 9 7 6 5 3
LEFT RIGHT L.P.F-2 GND
0V 8V
SW2
LED
SW1 COUNTER
38kHz CHECK V
OUTPUT CC
FC
SW1 VCO STOP SWITCH
SW2 38kHz MONITOR SWITCH
Note: Mark terminals are not existence in KIC9256P, KIC9256F
Terminal name of KIC9256P, KIC9256F is shown in parentheses.
Others are common terminals.
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IC402