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CDX-C4840R/C4850R
SERVICE MANUAL
AEP Model UK Model
Photo: CDX-C4850R
Model Name Using Similar Mechanism CD Drive Mechanism Type Optical Pick-up Name
CDX-C570R/C580R MG-363T-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
Outputs Speaker outputs (sure seal connectors) Speaker impedance 4 8 ohms Maximum power output 40 W × 4 (at 4 ohms)
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 outputs (2) (CDX-C4850R) Line output (1) (CDX-C4840R) Power aerial relay control lead Power amplifier control lead Telephone ATT control lead (CDX-C4850R) 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
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
Mass Supplied accessories
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-199-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 BUS system serial interface input BUS system serial interface output BUS system serial clock input/output Track jump No. count input Remote commander input CD-TEXT data input Not used. (Connect to ground in this set.) CD-TEXT data read clock output 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 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
22
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. 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 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 (4.19 MHz) Main ceramic oscillator output (4.19 MHz) Power supply pin (+5 V) COM 8V control output Not used. (Open) Destination select input 1 (Fixed at "L" in this set.) Destination select input 2 (Fixed at "L" (AEP, UK model) or "H" (German model) in this set.) Fixed at "L" 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
23
24
CDX-C4840R/C4850R
4-7. SCHEMATIC DIAGRAM -- CD MECHANISM SECTION -- · Refer to page 32 for Waveforms. · Refer to page 51 for IC Block Diagrams.
Note: · Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY : Impossible to measure
35
36
(Page 41)
CDX-C4840R/C4850R
4-9. SCHEMATIC DIAGRAM -- MAIN SECTION (1/3) -- · Refer to page 53 for IC Block Diagrams.
(Page 36)
C4850R
(Page 44)
(Page 46) Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY
41
42
CDX-C4840R/C4850R
4-10. SCHEMATIC DIAGRAM -- MAIN SECTION (2/3) -- · Refer to page 51 for IC Block Diagrams.
(Page 41)
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY
43
44
(Page 45)
CDX-C4840R/C4850R
4-11. SCHEMATIC DIAGRAM -- MAIN SECTION (3/3) -- · Refer to page 53 for IC Block Diagrams.
(Page 42)
(Page 44)
(Page 47)
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY
45
46
CDX-C4840R/C4850R
4-12. SCHEMATIC DIAGRAM -- DISPLAY SECTION --
(Page 46)
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM
47
48
· IC Block Diagrams IC1 CXD2507AQ
XLON SPOD SPOC SPOB SPOA CLKO VDD XLTO DATO CNIN SEIN CLOK XLAT
IC602 SAA6588T-118
64 63 62 61 60 59 58 57 56 55 54 53 52 PSWN 11 MAD 12 SERVO AUTO SEQUENCER IIC-BUS SLAVE TRANSCEIVER 10 SCL 9 SDA
4 4 SIGNAL QUALITY DETECTOR 5
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
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
AFIN 13
PAUSE DETECTOR
INTERFACE REGISTER
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
SCOUT 18 CIN 19 LVIN 20
3 TCON 2 MPTH 1 MRO
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 GTOP XUGF XPCK VDD GFS RFCK C2PO XROF MNT3 MNT1
IC3 BA6796FP-T1
OP IN OP IN + CH3-IN CH2-IN CH1-IN CH1 + CH2 + CH2 15 DRIVE BUFFER DRIVE BUFFER 14 CH3
28
27
26
25
24
23
22
21
20
19
18
CH1 17
VREF
CH3
CH2
VCC
CH1
16
LEVEL SHIFT
VCC LEVEL SHIFT
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
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 +
51
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
52
IC401 TDA7462
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
IC901 BA4903
XTI DGND VDD
1 2 3
CLK CONTROL
20 XTO 19 CLKO
5.7V
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
ON +
ON +
DIGITAL FILTER
THERMAL SHUT DOWN
REGULATOR VREF
NOISE SHAPER 5LEVE DAC LOWPASS FILTER CMOS AMP 5LEVEL DAC LOWPASS FILTER CMOS AMP
1 AMP ON CIRCUIT ON 2 AMP OUT 3 GND
OVER VOLTAGE PROTECT
4 VCC
5 VDD OUT
D/C R
8
13 D/C L 12 VOUTL 11 VCC
VOUTR 9 AGND 10
53
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 BUS INTERFACE I2C
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
IC703 LC89170M-T
IC803 BA8270F-E2
VDD EXCK 1 14 VDD
BUS ON 1
BUS ON SWITCH RESET SWITCH BATTERY SWITCH
14 VCC
CPU INTERFACE
RST 2
SBSO 2 32 WORD X 8 BIT DUAL PORT RAM CRC CHECKER 13 DQSY
SCOR 3
12 SRDT
BATT 3
13 12 11 10
RST BUS ON CLK IN BU IN
WFCK 4
11 SCLK
MCK 5
XMODE 6 GND 7
TIMING & SYNCHRONIZATION SIGNAL PROTECTION
10 SW2
CLK 4 VREF 5 DATA 6 GND 7
9 DATA IN 8 DATA OUT
9 SW1
8 TEST
54