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CDX-4270R
SERVICE MANUAL
AEP Model UK Model

Model Name Using Similar Mechanism CD Drive Mechanism Type Optical Pick-up Name

CDX-4180R MG-363X-121 KSS-521A

SPECIFICATIONS
CD player section
System Signal-to-noise ratio Frequency response Wow and flutter Compact disc digital audio system 90 dB 10 ­ 20,000 Hz Below measurable limit

Power amplifier section
Speaker outputs (sure seal connectors) Speaker impedance 4 ­ 8 ohms Maximum power output 40 W × 4 (at 4 ohms) Outputs

Tuner section
FM Tuning range Aerial terminal Intermediate frequency Usable sensitivity Selectivity Signal-to-noise ratio 87.5 ­ 108.0 MHz External aerial connector 10.7 MHz 12 dBf 75 dB at 400 kHz 65 dB (stereo), 68 dB (mono) Harmonic distortion at 1 kHz 0.8% (stereo), 0.6% (mono) Separation 35 dB at 1 kHz Frequency response 30 ­ 15,000 Hz MW/LW Tuning range

General
Outputs Line output (1) Power aerial relay control lead Power amplifier control lead Telephone ATT control lead Bass ±8 dB at 100 Hz Treble ±8 dB at 10 kHz 12 V DC car battery (negative ground) Approx. 178 × 50 × 185 mm (w/h/d) Approx. 182 × 53 × 162 mm (w/h/d) Approx. 1.2 kg Parts for installation and connections (1 set) Front panel case (1)

Tone controls Power requirements Dimensions Mounting dimension Mass Supplied accessories

MW: 531 ­ 1,602 kHz LW: 153 ­ 281 kHz Aerial terminal External aerial connector Intermediate frequency 10.7 MHz / 450 kHz Sensitivity MW: 30 µV LW: 50 µV

Design and specifications are subject to change without notice.

FM/MW/LW COMPACT DISC PLAYER
MICROFILM

1

SECTION 4 DIAGRAMS
4-1. IC PIN DESCRIPTION
· IC801 MB90574APMT-G-212-BND (SYSTEM CONTROL) Pin No. Pin Name I/O 1 2 3 4 5 6 7 8 9 ­ 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 ­ 48 49 50 51 52 53 54 55 LD ON FOK XLAT25 DATA25 XRST GFS NIL VCC NIL FLS SI/NOSE1 LCD SO/FLS SO LCD CKO BEEP NIL SQ SI NIL SQ CKO UNI SI UNI SO UNI CK C IN SIRCS TXT SI NIL TXT CKO CLOK25 SYSRST DEEMPH AMP ATT MD ON VSS C CD ON BUS ON NIL DVCC DVSS NIL ANGLE AVCC AVRH AVRL AVSS KEY IN0 ­ 2 RC IN0 QUALITY NIL MPDH S-METER VCC NS MASK O I O O O I -- -- -- I O O O -- I -- O I O I/O I I I -- O O O O O O -- -- O O O -- -- -- O -- -- -- -- I I I -- I I -- O Laser ON/OFF control output Focus OK signal detection input CD signal processing latch output CD signal serial data output Reset output to CD signal processor IC. GFS signal detection input Not used. (Connect to ground in this set.) Power supply pin (+5 V) Not used. (Open) Front panel attachment detection input LCD serial data output LCD serial clock output BEEP output Not used. (Open) Sub Q data input Not used. (Connect to ground in this set.) Sub Q read clock output SONY BUS system serial interface input SONY BUS system serial interface output SONY BUS system serial clock input/output Track jump No. count input Remote commander input CD-TEXT data input (Not used in this set.) Not used. (Connect to ground in this set.) CD-TEXT data read clock output (Not used in this set.) CD signal processing serial clock output System reset output De-emphasis output Power amplifier attenuator control output CD mechanism power control output Ground Power stabilization capacitor pin CD power control output BUS ON control output (Not used in this set.) Power control output of A/D conversion. VREF input of D/A converter. Ground of D/A converter. Not used. (Open) LCD view angle alignment output (Not used in this set.) Analog power supply pin (+5 V) VREF + input of A/D converter. VREF ­ input of A/D converter. Analog ground Key input 0 ­ 2 Rotary commander input 0 Noise detection input Not used. (Connect to ground in this set.) Tuner multi path input S-meter voltage detection input Power supply pin (+5 V) Noise detection output Pin Description

20

Pin No. 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88, 89 90 91 92 93 94 95 96 97 98 99 100 101 102, 103 104 105 106, 107 108 109 110

Pin Name AMP ON TXT ON VOL ATT NIL ATT RC IN1 TU ATT VSS NIL SSTOP TEST DAVN FM ON/AM ON TU ON SDA SCL NOSE2 X1A X0A SCOR BU IN DQSY CD SENS NIL TEL ATT ST/MONO SEEKOUT SD IN WIDE NARROW HSTX MD2 MD1, 0 RESET VSS X0 X1 VCC COM8V ON NIL AREA1 AREA2 LOUD BAND ACC IN PH3, 2 LCD CE FLS W RE IN0, 1 ILL ON PW ON NIL

I/O O O O -- O I O -- -- I I I O O I/O O I O I I I I I I I I/O O I O O -- -- -- I -- I O -- O -- I I I I I I O I I O O --

Pin Description Power amplifier power control output Reset output to CD-TEXT decoder IC. (Not used in this set.) Electric volume mute control output Not used. (Open) System attenuate control output Rotary commander shift key input 1 Tuner attenuate output Ground Not used. (Open) IF counter result signal detection input of PLL. Test mode initial setting detection input RDS IC data acquisition detection input FM ON output Tuner power control output I2C BUS serial data input/output I2C BUS serial clock output Front panel OPEN detection input Sub ceramic oscillator output (32 kHz) Sub ceramic oscillator input (32 kHz) SCOR signal detection input Backup power detection input CD-TEXT data setting completion signal detection input (Not used in this set.) CD SENS signal detection input Key input acknowledge Telephone attenuate detection input Tuner stereo signal detection input/forced monaural output SEEK output Signal detector input WIDE select output (Not used in this set.) NARROW select output (Not used in this set.) Hardware standby input (Connect to pin (ş (RESET).) Operation mode input (Connect to ground in this set.) Operation mode input (Connect to VCC in this set.) Reset input Ground Main ceramic oscillator input (3.68 MHz) Main ceramic oscillator output (3.68 MHz) Power supply pin (+5 V) COM 8V control output Not used. (Open) Destination select input 1 (Fixed at "H" in this set.) Destination select input 2 (Fixed at "L" (AEP, UK model) or "H" (German model) in this set.) Fixed at "H" in this set. Fixed at "H" in this set. Accessory power detection input Disc insertion detection photo sensor input (Fixed at "H" in this set.) LCD chip enable output Flash write input (Fixed at "H" in this set.) Rotary encoder input Illumination power control output System power control output Not used. (Open)

Pin No. 111 112 113 114 115 116 117 118 119 120

Pin Name ANT REM NIL CTL2 CD LD CD EJ L SW IN SW/(PH1) D SW VSS SELF SW/(IN SW)

I/O O -- -- O O I I I -- I

Pin Description ANT REMOTE power control output Not used. (Open) Not used in this set. Loading motor control output (Loading direction) Loading motor control output (Eject direction) Sled limit switch detection input Disc insertion detection input DOWN switch detection input Ground Disc self store detection input

21

21

CDX-4270R

4-7. SCHEMATIC DIAGRAM -- CD MECHANISM SECTION -- · Refer to page 25 for Waveforms. · Refer to page 35 for IC Block Diagrams.

(Page 30)

Note: · Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY : Impossible to measure

27

27

CDX-4270R
4-9. SCHEMATIC DIAGRAM -- MAIN SECTION (1/3) -- · Refer to page 37 for IC Block Diagrams.

(Page 27)

TDA7384

(Page 31)

(Page 32)

Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY

30

30

CDX-4270R
4-10. SCHEMATIC DIAGRAM -- MAIN SECTION (2/3) -- · Refer to page 38 for IC Block Diagrams.
(Page 30)

0.056

Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY

31

31

(Page 32)

CDX-4270R

4-11. SCHEMATIC DIAGRAM -- MAIN SECTION (3/3) -- · Refer to page 38 for IC Block Diagrams.

(Page 30)

(Page 31)

(Page 33)

Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY

32

32

CDX-4270R

4-12. SCHEMATIC DIAGRAM -- DISPLAY SECTION --

(Page 32)

Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM

33

33

· IC Block Diagrams IC1 CXD2507AQ
XLON SPOD SPOC SPOB SPOA CLKO VDD XLTO DATO CNIN SEIN CLOK XLAT

64 63 62 61 60 59 58 57 56 55 54 53 52

FOK MON MDP MDS LOCK TEST FILO FILI PCO VSS AVSS CLTV AVDD

1 2 3 4 5 6 7 8 9 10 11 12 13

SERVO AUTO SEQUENCER

5

14

CPU INTERFACE

SUB CODE PROCESSOR 4 DIGITAL CLV

DIGITAL PLL

EFM DEMODULATOR

51 50 49 48 47 46 45 44 43 42 41 40

DATA XRST SENS MUTE SQCK SQSO EXCK SBSO SCOR VSS WFCK EMPH

3 ASYMMETRY CORRECTOR 5 D/A INTERFACE DIGITAL OUT
CLOCK GENERATOR

39 DOUT 38 37 36 35 34 C4M FSTT XTSL XTAO XTAI

RF BIAS ASYI ASYO ASYE

14 15 16 17 18

16K RAM

ERROR CORRECTOR 3

6

WDCK 19

33 MNTO

20 21 22 23 24 25 26 27 28 29 30 31 32
LRCK PCMD BCLK
OP IN ­ OP IN +

IC3 BA6796FP-T1
CH3-IN CH2-IN CH1-IN CH1 + CH2 + CH2 ­

GTOP XUGF XPCK VDD GFS RFCK C2PO XROF MNT3 MNT1

28

27

26

25

24

23

22

21

20

19

CH1 ­

VREF

CH3

CH2

VCC

CH1

18

17

16

15

LEVEL SHIFT

VCC LEVEL SHIFT

DRIVE BUFFER

DRIVE BUFFER

DRIVE BUFFER

DRIVE BUFFER

LEVEL SHIFT

THERMAL SHUT DOWN

LEVEL SHIFT

LOGIC CTL1 CTL2 FWD REV

V/I

DRIVE BUFFER

DRIVE BUFFER

DRIVE BUFFER

DRIVE BUFFER

DRIVE BUFFER

1
OPOUT

2
CH4-IN

3
CH4

4
CTL1

5
CTL2

6
FWD

7
REV

8
TRAY

9
GND

10
CH5 ­

11
COM

12
CH4 +

13
CH3 +

14
CH3 ­

35

IC2 CXA1782BQ
PHD 2 PHD 1 RF M RF O PHD RF I

CC1

CC2 IIL

36

35

34

33

32

31

30

29

28

27 26 25

APC

LEVEL S

FOK

MIRR RF IV AMP1 DFCT

FOK 24 23

LD

CP

CB

SENS C.OUT

TTL

TTL RF IV AMP2 FE BIAS 37 TTL IIL DATA REGISTER INPUT SHIFT REGISTER ADDRESS DECODER FE AMP

22 21 20

XRST DATA XLT CLK

IIL IIL OUTPUT DECODER 19

F

38 F IV AMP TOG1-3 BAL1-3 FZC COMP FS1-4 TG1-2 TM1-7 PS1-4

E

39

18

VCC

E IV AMP EI 40 TE AMP BAL1 BAL 3 BAL2

HPF COMP VEE

LPF COMP

TRACKING PHASE COMPENSATION TM6

ISET

17

ISET

41 TG1 16 TOG1 TOG2 TOG3 TM5 TM4 TZC COMP FCS PHASE COMPENSATION TM3 WINDOW COMP ATSC DFCT DFCT TM1 FS1 TM7 FS2 13 TA O TM2 14 SL P 15 SL O SL M

TED 42

LPFI 43 TEI 44

ATSC 45 TZC 46

TDFCT 47 TG2

VC

48

FS4

1 FEO

2 FEI

3 FDFCT

4 FGD

5 FLB

6 FE O

7 FE M

8 9 SRCH TGU

10 TG2

11 FSET

F SET

12 TA M

36

IC401 TDA7462D013TR

PAUSE DETECT INPUT GAIN & AUTO ZERO TREBLE/ BASS CONTROL CIRCUIT FRONT FADER

28 27 26 25 24 23

SE3L SE3R MUTE SDA SCL PAUSE

SE1L SE1R MD+ MD­ CDL+ CDL­ CDR­ CDR+ PDR PDGND PDL SE2L SE2R

1 2 3 4 5 6 7 8 9 10 11 12 13

FRONT SIDE SELECTOR

LOUDNESS CONTROL CIRCUIT

VOLUME CONTROL CIRCUIT

SOFT MUTE

VOICE BANDPASS HP LP

22 OUT FL

INPUT MULTIPLEXER & MIXING STAGE

FRONT FADER COMPANDER REAR FADER LOUDNESS CONTROL CIRCUIT

21 OUT FR

REAR SIDE SELECTOR

20 OUT RL

INPUT GAIN

REAR FADER

19 OUT RR

BEEP

SUBWOOFER LP

FADER 18 SUBOUT+ 17 SUBOUT­ SDA

SUBWOOFER OUT IIC BUS

DIGITAL CONTROL CIRCUIT

SCL 16 VDD 15 GND

CREF 14

POWER SUPPLY

IC702 PCM1717E-ST2

XTI DGND VDD

1 2 3

CLK CONTROL

20 XTO 19 CLKO

LRCIN 4 DIN BCKIN ZERO 5 6 7

INPUT INTERFACE

18 ML/MUTE MODE CONT ROL 17 MC/DM1 16 MD/DM0 15 RSTB 14 MODE

DIGITAL FILTER

NOISE SHAPER 5LEVE DAC LOWPASS FILTER CMOS AMP 5LEVEL DAC LOWPASS FILTER CMOS AMP

D/C R

8

13 D/C L 12 VOUTL 11 VCC

VOUTR 9 AGND 10

37

IC601 TDA7427AD1TR

28 LPOUT VDD1 LP FM LP HC LP AM V REF 1 2 3 4 INLOCK DETECTOR TEST LOGIC SWITCH LP1/LP2 CHARGE PUMP PHASE COMP 11 BIT PROG COUNTER SWITCH SWM/DIR 6 BIT PROG COUNTER SWITCH SWM/DIR PRE COUNTER :32/33 SWITCH AM/FM 27 VDD2 26 GND AM

25 AM IN

LCL/DX SEEK NIL MONO

5 6 7 8

24 FM IN

PORT EXTENSION

23 NC

OSCIN 9 OSCOUT 10 NC 11 SCL 12 SDA 13 I2C BUS INTERFACE

REF OSCILLATOR

16 BIT PROG COUNTER

SUPPLY & POWER ON RESET

22 GND D 21 VDD1 20 ADDR 19 HFREF 18 AMOSC

14 BIT PROG COUNTER

TIMER

CONTROL

SWITCH OUT

17 DOUT/INLOCK

IF AM 14

SWITCH AM/FM

11-21 BIT PROG COUNTER

16 SSTOP 15 IF FM

IC602 SAA6588T-118

IC901 BA4903ST-V5

PSWN 11 MAD 12

4 4 SIGNAL QUALITY DETECTOR 5

IIC-BUS SLAVE TRANSCEIVER

10 SCL 9 SDA

5.7V

AFIN 13

PAUSE DETECTOR

INTERFACE REGISTER

ON ­ +

ON + ­

VDDA VSSA MPX VREF

14 15 16 17

CLOCKED COMPARATOR POWER SUPPLY AND RESET 57kHz 8th ORDER BAND-PASS

RDS/RDBS DEMODULATOR

RDS/RDBS DECODER

OSCILLATOR AND CLOCK TEST CONTROL MULTI-PATH DETECTOR

8 7 6 5 4

DAVN VDDD VSSD OSCI OSC0

THERMAL SHUT DOWN

REGULATOR VREF

SCOUT 18 CIN 19 LVIN 20

3 TCON 2 MPTH 1 MRO
1 AMP ON

CIRCUIT ON 2 AMP OUT 3 GND

OVER VOLTAGE PROTECT

4 VCC

5 VDD OUT

38