Kenwood KRC-15RG, Руководство по обслуживанию

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