Kenwood KRC28 free download

File name Kenwood-KRC28 car radio.pdf

CASSETTE RECEIVER KRC-28YG/YA SERVICE MANUAL © 1999-11 PRINTED IN JAPAN B51-7546-00 (N) 1580 MECHANISM EXTENSION CORD W05-0477-00 (7P) W05-0609-00 (10P) CASSETTE LID (A53-1638-13) EJECT A.ADJ PANEL ASSY (A64-1909-02) SRC PWR OFF MONO KRC-28 40W X 4 LOUD B.S REP T.CALL AUTO AME CLK ADJ FRONT GLASS (B10-3140-01) ESCUTCHEON (B07-2181-02) DC CORD (E30-4790-05) LEVER (D10-3031-04)x2 PLASTIC CABINET ASSY (A02-1486-13) ANTENNA ADAPTOR (T90-0523-05) MOUNTING HARDWARE ASSY (J21-9491-03) TAPE L/R COM+B S MUTE KRC-28YG/YA OUT MOTOR PACK IN T MODE FWD/REV DSI LCD DATA IN REMOTE LCD DATA OUT LCD CE LCD CLK PANEL ON/OFF RST MODE REV 5 LCD 10 2 IC2 COM+B AM ANT J1 (AM) (FM) KM:360mV 168mV E:190mV 162mV A1 MPX LEVEL MP IN OUT LF OUT RF OUT LR OUT RR SDA SCK SCK SDA IC4 POWER IC SP OUT E-VOL (TAPE)1708mV (FM) KM:1600mV E:1100mV (CD-CH)3635mV (AM) 615mV B.U. 14V 830mV FM ANT AM ANT IC1 4ch FM+B AM+B Q201 SVR IC7 AMP MUTE PWR STBY SVR SW SVR MUTE STBY B.U. 5V MUTE DRIVER S-METER S METER Q41-44 SYSTEM u-COM Q121 ACC B.U. FM +B AM +B AUDIO OUT J5/6 PRE OUT PRE MUTE MUTE PLL PLL DATA PLL CLK IC6 (TAPE)1642mV (FM) KM:1500mV E:1060mV (CD-CH)3495mV (AM) 570mV 780mV SUB MOTOR PHONE ILL ON SUB+ SUB- J2 TEL-MUTE Q116,117 ANT-CON Q94-96 P-CON 341mV ANT-CON P-CONT ACC DET Q118 B.U. DET B.U. ACC BLOCK DIAGRAM IC5 DSI PANEL ON/OFF B.U. 5V TAPE L/R Q105 Lch COM Rch EQ AMP Q104 PAN 5V SUB M MAIN M Q84,85 Q101 P.ON 5V COM+B M2 M1 8V AVR P.ON 5V Q80,81 B.U. 5V Ref.94 T-END Ref.105 Ref.95 STBY PACK IN B.U. 5V Ref.103 Ref.102 FWD Q87-89 RST SW ILLUMI AVR Q92 AM+B Q93 FM+B Lch HD1 Rch IC1 LCD DRIVER WITH KEY MATRIX KEY KRC-28YG/YA CIRCUIT DESCRIPTION (X14-) IC1 : SYSTEM u-COM PORT No. PORT NAME I/O 1 XIN 2 TEST 2 3 LCD DATA IN 4 LCD DATA OUT 5 LCD CLK 6 STBY 7 T END 8 SDA 2 9 SCL 2 10 REQ H 11 DATA C 12 DATA H 13 CH CLK 14 REQ C 15 CH CON 16 LCD CE 17 AM+B 18 FM+B 19 MUTE 20 ILLUMI 21 AMP STBY 22 SVR 23 P.CON 24 ANT CONT 25 SUB+ 26 SUB27 28 SEL 2 29 SEL 1 30 SEL 0 31 VDD 32 N.CAN 33 MOTOR 3436 FUNCTION (X14-) IC1 : SYSTEM u-COM PORT No. PORT NAME I/O 41 42 MS CONT 43 44 BEEP 45 PANEL 46 AMP MUTE 47 CRSC 48 PACK IN 49 FWD/REV 50 SDA3 51 SCL3 52 METAL 53 DOLBY 54 AM IF CONT 55 SD 56 REMOTE 5760 FUNCTION I I O O I I Clock input GND LCD driver data input LCD driver data output LCD driver clock output Tape stand-by SW Tape end SW O O I O I I I O O O O I I I I I I I I I I I I Beep output(2.08KHz) Panel ON/OFF detection Mute Pack-in detection Tape FWD/REV PLL/EEPROM data line PLL/EEPROM clock line Metal mode ON/OFF Dolby AM IF count judgement SD input Remote controller Mode pulse input Telephone mute input ACC detection Back Up detection Tape signal detection FM band SD detection Hold Detection GND GND VDD GND GND GND GND Clock output I/O Data line to E-VOL. O O I O I I O O O O O O O O O O O O I I I I O O O O Clock line to E-VOL. Changer request output Changer data input Changer data