Kenwood KRC-28MR, Руководство по обслуживанию

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3
KRC-208S/218,268/288,28MR
COMPONENT DESCRIPTION
SYNTHESIZER UNIT (X14-614x-xx)
REF. No. FUNCTION OPERATION
IC1 SYSTEM
µ
-COM Controls system.
IC2 ELECTRIC VOLUME Controls sound volume. Selects each source.
IC3 MUTE Controls each mute output.
IC4 POWER IC Amplifies power so that the speaker can drive audio signal.
IC5 EQUALIZER AMPLIFIER Equalizer amplifier for cassette tape sound.
Q50 BACK-UP DETECTION Stops when the back-up voltage comes less than 9.2V.
Q51,52 BACK-UP 5V AVR Works when the back-up works.
Q53 P.ON DRIVER Works when the power comes.
Q54,55 COM+B SW Works when 5V comes.
Q56,57 COM+B AVR Works when Q54 and Q55 work.
Q58,59 ILLUMIB SW Works when the base level of Q58 comes "H".
Q60,61 ILLUMIB AVR Works when Q58 and Q59 work.
Q150 ELECTRIC VOLUME MUTE SW Works when the base level comes "H".
Q151 SVR DISCHARGE SW Works when the base level comes "H".
Q153 PRE MUTE DRIVER Works when the base level comes "L".
Q200 FM +B SW Works when the base level comes "H" in FM mode.
Q201 FM +B DRIVER Works when Q200 works.
Q202 AM +B SW Works when the base level comes "H" in AM mode.
Q203 AM +B DRIVER Works when Q203 works.
Q260 MOTOR +B SW Works when the base level comes "H" in the tape mode.
Q261 MOTOR +B DRIVER Works when Q260 works.
Q301 CHANGER RESET SW Works when the base level comes "L".
Q320 PANEL 5V SW Works when the base level comes "L".
Q350 P-CON. DRIVER Works when Q353 works.
Q351,352 P-CON. PROTECTION Works when P-CON output voltage goes down.
Q353 P-CON. SW Works when the base level comes "H".
Q370 ANTENNA CONTROL DRIVER Works when Q371 works.
Q371 ANTENNA CONTROL SW Works when the base level comes "H" in the tuner mode.
Q450,451 PRE MUTE SW Works when Q153 works.