Icom IC-R100 Service Manual page 9

e 2ND IF AND ҒМ/АМ DEMODULATOR CIRCUITS
5.0У
I01
2nd LO AM5 line
IC3 is designed for use in digital data communications
equipment. IC3 contains the 2nd mixer, local oscillator 4-2-7 AGC CIRCUIT (MAIN UNIT)
Q12 is turned ON.
4-2-6 S-METER CIRCUIT (MAIN UNIT)
When the scan is in operation, the AGCR signal from
e МЕМ DEMODULATOR CIRCUIT
5.0 V
2nd LO signal
WFMS5 line
S-METER
MUTE
Q9
TAGC
Signal
SM line
from
LOGIC
UNIT
(сз S-Meter АМР
signal
S-METER
MUTE
010
1st IF signal