CDX-4250/4500 SERVICE MANUAL FM/AM COMPACT DISC PLAYER. US Model Canadian Model CDX-4250 E Model CDX-4500 SPECIFICATIONS.

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1 SERVICE MANUAL US Model Canadian Model CDX-4250 E Model CDX-4500 Photo: CDX-4250 SPECIFICATIONS Model Name Using Similar Mechanism CD Drive Mechanism Type Optical Pick-up Name CDX-4180 MG-363X-121 KSS-521A FM/AM COMPACT DISC PLAYER MICROFILM 1

2 SECTION 4 DIAGRAMS 4-1. IC PIN DESCRIPTION IC801 µpd17705gc-534-3b9 (SYSTEM CONTROL) Pin No. Pin Name I/O Pin Description 1 SIRCS I SIRCS input (A/D) 2 IN-SW I CD mechanism position detection 3 D-SW I CD mechanism position detection 4 SELF-SW I CD mechanism position detection 5 L-SW I LIMIT switch 6 LM-EJ O Loading motor control (Eject direction) 7 LM-LOD O Loading motor control (Loading direction) 8 AMP/ANT-ON O Power control for amplifier. 9 MONO O Force MONO output 10 SD I SD signal input 11 BAND-SW I Initialize switch input terminal 12 AREA1-SW I Initialize switch input terminal 13 AREA2-SW I Initialize switch input terminal 14, 15 RE1, 2 I Rotary encoder input 1, 2 16 SEEK O SEEK output 17 CD-ON I/O Servo drive power 18 FM-ON I/O FM select output 19 TU-ON I/O AM select output 20 NC Not used. 21 GND3 Ground 22 KEYIN3 I Not used (Connect to ground) 23, 24 KEYIN2, 1 I A/D key input 2, 1 25 ROT-IN I Rotary commander input 26 S-METER I FM and AM common signal meter A/D conversion input 27 TEST-SW I TEST mode select input 28 AM-IFC I AM center frequency input 29 FM-IFC I FM center frequency input 30 VDD2 Power supply (5 V) 31 VCOH-FM I Local oscillation frequency input (FM) 32 VCOL-AM I Local oscillation frequency input (AM) 33 GND2 Ground 34 NC Not used. 35 EO1-PDOUT O Error out output 36 TESTO Connect to ground 37 AM-ON(TU-ON) O AM power output (AM select) 38 FM-ON(FM/AM) O FM power output (FM select) 39 LCL/DX O LOCAL/DX select ( H : LOCAL, L : DX) 40 BEEP O BEEP output 41 ACC-IN I Accessory input 42 SCOR I SUBQ data read request 43 MUTE O System mute output 44 AMP-MUTE O Power amplifier mute output 45 TEL-MUTE O Telephone mute output 46 NC Fixed at H in this set. 47 VOL-CE O Electric volume chip select 48 VOL-CLK O Electric volume serial clock 49 VOL-DATA O Electric volume serial data 50 EMPHO O De-emphasis control output 51 PW-ON O System power control 52 MD-ON O Loading motor power 53 CD-ON O Servo drive power 19

3 Pin No. Pin Name I/O Pin Description 54 ILL-ON O Illumination output 55 C.ALARM I Caution alarm select input (Used/Not used) 56 NC I Not used (Connect to ground) 57 NC Fixed at H in this set. 58 LCD-CE O LCD drive chip select output 59 EZ-SEL I SHIFT input 60 SENS I Information input from servo IC. 61 FOK I Focus OK input 62 LD-ON O Laser diode control 63 NC Not used. (Connect to ground) 64 [IN] ST/MONO I/O Used for both STEREO indicator display input and force MONO output. (FM) [OUT] MONO 65 LCD-CKO O LCD driver serial clock output 66 LCD-So O LCD driver serial data output 67 INH O INHbit output 68 SQ-CKo O Q data read serial clock output 69 CD-RST O Servo IC/DAC reset output 70 SQ-SI I Q data input 71 CD-SO O Serial data output to servo IC. 72 CD-LAT O Data latch output to servo IC. 73 CD-CKO O Serial clock output to servo IC. 74 VREF Not used. 75 GND1 Ground 76 X-OUT Crystal oscillator connection (4.5 MHz) 77 X-IN I Crystal oscillator connection (4.5 MHz) 78 BU-IN I Back-up detection 79 VDD1 Power supply (5 V) 80 RESET I RESET input 20

4 4-4. SCHEMATIC DIAGRAM CD MECHANISM SECTION Refer to page 22 for Waveforms and Note and page 37 for IC Block Diagrams. (Page 33) 25 26

5 4-5. PRINTED WIRING BOARD DISPLAY SECTION Semiconductor Location Ref. No. Location Ref. No. (D551) B-10 (D552) B-10 (D554) B-11 D561 B-11 D562 A-13 D563 B-13 D564 C-5 D565 C-4 Location D566 A-4 D567 C-2 D568 C-9 D569 C-8 D570 C-7 D571 C-12 D572 C-11 D573 C-3 Ref. No. Location D574 C-2 D575 B-3 D576 A-2 D577 B-1 D578 A-1 (IC551) B-7 Note: : Through hole. b : Pattern from the side which enables seeing. (The other layer s patterns are not indicated.) Caution: Pattern face side: Parts on the pattern face side seen from the (Side B) pattern face are indicated. Parts face side: Parts on the parts face side seen from the (Side A) parts face are indicated. ( ) : SIDE B 27 28

6 4-6. SCHEMATIC DIAGRAM DISPLAY SECTION (Page 36) Note: All capacitors are in µf unless otherwise noted. pf: µµf 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in Ω and 1 /4 W or less unless otherwise specified. U : B Line. Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords C : panel designation. Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

7 4-8. SCHEMATIC DIAGRAM MAIN SECTION (1/2) (Page 26) Note: All capacitors are in µf unless otherwise noted. pf: µµf 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in Ω and 1 /4 W or less unless otherwise specified. : internal component. C : panel designation. U : B Line. Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords. Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : AM < > : CD PLAY : Impossible to measure Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances. Signal path. F : FM f : AM J : CD Abbreviation CND : Canadian model

8 4-8. SCHEMATIC DIAGRAM MAIN SECTION (2/2) Refer to page 39 for IC Block Diagrams. CDX-4250 (Page 29) 35 36

9 XPCK VDD GFS RFCK IC Block Diagrams IC1 CXD2507AQ XLON SPOD SPOC SPOB SPOA CLKO VDD XLTO DATO CNIN SEIN CLOK XLAT FOK MON MDP MDS LOCK TEST FILO FILI PCO VSS AVSS CLTV AVDD DIGITAL PLL ASYMMETRY CORRECTOR SERVO AUTO SEQUENCER CPU INTERFACE 5 SUB CODE PROCESSOR EFM DEMODULATOR 3 4 DIGITAL CLV DATA XRST SENS MUTE SQCK SQSO EXCK SBSO SCOR VSS WFCK EMPH RF BIAS ASYI ASYO ASYE K RAM ERROR CORRECTOR D/A INTERFACE 3 6 DIGITAL OUT CLOCK GENERATOR DOUT C4M FSTT XTSL XTAO XTAI WDCK MNTO LRCK PCMD BCLK GTOP XUGF C2PO XROF MNT3 MNT1 IC3 BA6796FP-T OPOUT CH4-IN CH4 CTL1 CTL2 FWD REV TRAY GND CH5 COM CH4 CH3 CH3 OP IN OP IN VREF CH3 CH3-IN CH2 CH2-IN VCC CH1 CH1-IN CH1 CH1 CH2 CH LEVEL SHIFT LEVEL SHIFT VCC LEVEL SHIFT THERMAL SHUT DOWN LEVEL SHIFT LOGIC CTL1 CTL2 FWD REV V/I 37

10 IC2 CXA1782BQ PHD 2 PHD 1 PHD LD RF O RF I CP CB CC1 CC2 FOK APC LEVEL S SENS C.OUT FE BIAS XRST DATA XLT CLK F 38 E VCC EI 40 VEE TED ISET SL O 15 SL M LPFI TEI ATSC TZC TDFCT SL P TA O VC FEO FEI FDFCT FGD FLB FE O FE M SRCH TGU TG2 FSET TA M FOK RF M RF IV AMP1 MIRR DFCT IIL TTL RF IV AMP2 TTL IIL DATA REGISTER INPUT SHIFT REGISTER ADDRESS DECODER TTL FE AMP IIL OUTPUT DECODER IIL F IV AMP TOG1-3 BAL1-3 FS1-4 TG1-2 TM1-7 PS1-4 FZC COMP E IV AMP TE AMP BAL1 BAL2 BAL 3 HPF COMP TG1 LPF COMP TRACKING PHASE COMPENSATION TM6 ISET TOG1 TOG2 TOG3 TM5 TM4 WINDOW COMP ATSC DFCT TZC COMP DFCT TM1 FCS PHASE COMPENSATION FS1 FS2 TG2 TM3 TM7 TM2 FS4 F SET 38

11 IC401 LC75374E LFIN LFOUT LSELO L4 L3 L2 L LROUT VDD 39 R1 R2 R3 R4 RSELO DECODER LATCH CONTROL SHIFT REGISTER 19 VREF CE DI CL VSS RROUT 13 RFOUT 12 RFIN RVRIN RCOM RT1 RT2 RT3 RTOUT RSIN NC NC RSB1 RSB2 LVRIN LCOM LT1 LT2 LT3 LTOUT LSIN NC NC LSB1 LSB2 IC402 TDA7384 R R R R TAB GND OUT2 STNBY OUT2 VCC OUT1 GND OUT1 SVR IN1 IN2 S-GND IN4 IN3 AC-GND OUT3 GND OUT3 VCC OUT4 MUTE OUT4 GND N.C. 39

CDX-6500 SERVICE MANUAL FM/AM COMPACT DISC PLAYER. E Model SPECIFICATIONS. Model Name Using Similar Mechanism. Optical Pick-up Name MICROFILM

CDX-6500 SERVICE MANUAL FM/AM COMPACT DISC PLAYER. E Model SPECIFICATIONS. Model Name Using Similar Mechanism. Optical Pick-up Name MICROFILM CDX-6500 SERVICE MANUAL E Model Model Name Using Similar Mechanism CD Drive Mechanism Type Optical Pick-up Name CDX-4180 MG-363X-121 KSS-521A SPECIFICATIONS FM/AM COMPACT DISC PLAYER MICROFILM 1 SECTION