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KRC-15R,179R,25R,279R,281R
COMPONENT DESCRIPTION
SYNTHESIZER UNIT (X14-656x-xx)
REF No. IC1 IC2 IC3 IC4 IC5 IC6 IC7 Q49 Q50 Q51,52 Q53 Q54,55 Q56,57 Q58,59 Q60,61 Q150 Q151 Q153 Q201 Q203 Q260 Q261 Q301 Q320 Q350 Q351 Q352 Q353 Q450,451 Q500 Q501,502 Q503 FUNCTION SYSTEM µ-COM E-VOLUME MUTE LOGIC POWER AMPLIFIER EQUALIZER AMPLIFIER RESET RDS DECODER ACC DETECTION SW BACK-UP DETECTION SW BACK-UP 5V DRIVER P.ON 5V SW 8V SW 8V DRIVER ILLUMI +B SW ILLUMI +B DRIVER E-VOL MUTE SW SVR FORCED DISCHARGE SW PRE OUT MUTE SW FM +B SW AM +B SW MOTOR +B SW MOTOR +B DRIVER CD-CH RESET SW PANEL 5V SW P.CON DRIVER SW P.CON PROTECTION SW P.CON PROTECTION INHIBIT SW P.CON DRIVER SW PRE OUT MUTE SW AUDIO OUTPUT BUFFER AFC TIME CONSTANT SW NOISE BUFFER OPERATION Controls the unit. Controls the volume and selects source. Controls the mute output. For the speaker output. For the cassette tape's signal. Resets the power. Decodes the radio data. Outputs "H" during the ACC off. Outputs "H" when the back-up voltage is under 9.2V. Works when back-up current exists. Works during the power on. Works during the power on. Works during the power on. Works during the power on. Works during the power on. Works when the back-up current is detected or the changer mute works or system µ-com mute works. Works when the amplifier mute works. Works when the back-up current is detected or the changer mute works or system µ-com mute works. Works during FM mode. Works during AM mode. Works during the tape mode. Works when Q206 works. Works when the power is reset and the reset SW works. Works when the back-up current exists and the panel is attached on the unit. Does not work during the power off and the ALL OFF. Works when the P.CON is short-circuited on the GND. Inhibits the protection SW in a moment during the P.CON on. Does not work during the power off and the ALL OFF. Works when the back-up current is detected or the changer mute works or system µ-com mute works. For RDS decoder. Works during receiving FM signal. For noise level detection.
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