Kenwood KRC-21SA Service Manual

Also see for KRC-21SA: Instruction manual Instruction manual

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KRC-21SA/SG/SYA/SYGKRC-266/S4MICROCOMPUTER'S TERMINAL DESCRIPTION SYSTEM MICROCOMPUTER LC72366-9592 (IC1 : X14-685x-xx)Pin No. Pin name I/O Description Processing Operation1 XIN I Main clock resonator connection terminal2 GND - TEST terminal 2 Connected to GND lines.3 L DATA L I Data input from the LCD driver IC4 L DATA S O Data output to the LCD driver IC5 L CLK O Clock output to the LCD driver IC6 L CE O CE output to the LCD driver IC7 SDA I/O Data input/output with the E-VOL. IC8 PLL DATA I/O Data input/output with the F/E9 PLL CLK O Clock output to the F/E10 SD I SD input from the F/E Hi : Station detected11 DATA C I Data input from changers12 DATA H O Data output to changers13 CH CLK I/O Clock input/output with changers14 - O - N.C. (Not used)15 MOTOR O Cassette motor on/off output Hi : Motor ON16 SCL O Clock output to the E-VOL. IC17-24 - O - N.C. (Not used)25 AM+B O AM+B ON/OFF output Hi : during AM reception26 FM+B O FM+B ON/OFF output Hi : during FM reception27 PACK IN I Cassette tape Pack-in detection input Lo : Pack-in28 FF/REW I FF/REW detection input Lo : FF/REW, Hi : PLAY29 GND I - Connected to GND lines.30 GND I - Connected to GND lines.31 VDD - Positive power supply connection terminal Connected to B.U. 5V lines.32 REQ C I Request input from changers Lo : Request33 MUTE O Audio mute on/off output Hi : Mute ON34 CH CON O Changer control Lo : Standby, Hi : ON35 REQ H O Request output to changers Lo : RequestWhen the momentary power down, after ACC36 SVR O Power IC reset terminal ON/OFF is detected and after POWER OFF,the output becomes Hi temporarily.37 AMP STBY O Power IC standby control output Hi : POWER ON mode38 AMP MUTE O Power IC mute control Lo : Mute39 P CON O Power control Hi : POWER ON mode40 ANT CON O Antenna control Hi : during FM/AM reception41 SW5V O SW 5V control Lo : POWER ON mode42 ILL O Illumination AVR ON/OFF control terminal Hi : POWER ON mode43 - O - N.C. (Not used)44 BEEP O BEEP sound output45-47 - O - N.C. (Not used)48 ROLL OFF I Roll off input Pull down to GND lines. (Not used)49 NOISECANCELLER I Noise canceller input Pull down to GND lines. (Not used)www . xiaoyu163. comQQ 376315150 992894298TEL 13942296513 992894298051513673QQTEL 13942296513 QQ 376315150 892498299TEL 13942296513 QQ 376315150 892498299