Sony CDX-CA720X Service Manual
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Sony CDX-CA720X Service Manual

Sony CDX-CA720X Service Manual

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SERVICE MANUAL
Ver 1.1 2003. 02
• The tuner and CD sections have no adjustments.
AUDIO POWER SPECIFICATIONS (US Model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
23.2 watts per channel minimum continuous average power into
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more
than 5% total harmonic distortion.
CD player section
Signal-to-noise ratio
90 dB
Frequency response
10 – 20,000 Hz
Wow and flutter
Below measurable limit
Tuner section
FM
Tuning range
87.5 – 107.9 MHz
Antenna terminal
External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Usable sensitivity
8 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
66 dB (stereo),
72 dB (mono)
Harmonic distortion at 1 kHz
0.6% (stereo),
0.3% (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
AM
Tuning range
530 – 1,710 kHz
Antenna terminal
External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity
30 µV
Sony Corporation
9-873-583-02
2003B0400-1
e Vehicle Company
© 2003. 02
Published by Sony Engineering Corporation
CDX-CA720X
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
Power amplifier section
Outputs
Speaker impedance
Maximum power output 52 W × 4 (at 4 ohms)
General
Outputs
Inputs
Tone controls
Loudness
FM/AM COMPACT DISC PLAYER
US Model
Canadian Model
CDX-CA700/CA700X
MG-393XA-121//Q
KSS-720A
Speaker outputs
(sure seal connectors)
4 – 8 ohms
Audio outputs (front /rear)
Power antenna relay control terminal
Power amplifier control terminal
Telephone ATT control terminal
Illumination control terminal
BUS control input terminal
BUS audio input terminal
Remote controller input terminal
Antenna input terminal
Bass ±10 dB at 62 Hz
Treble ±10 dB at 16 kHz
+8 dB at 100 Hz
+2 dB at 10 kHz
– Continued on next page –
1

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  • Page 1 530 – 1,710 kHz Antenna terminal External antenna connector – Continued on next page – Intermediate frequency 10.7 MHz/450 kHz Sensitivity 30 µV FM/AM COMPACT DISC PLAYER Sony Corporation 9-873-583-02 2003B0400-1 e Vehicle Company © 2003. 02 Published by Sony Engineering Corporation...
  • Page 2 NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • Page 3: Table Of Contents

    CDX-CA720X TABLE OF CONTENTS 1. GENERAL 3. DIAGRAMS Location of controls ..............4 3-1. IC Pin Description ............. 13 Connections ................5 3-2. Block Diagram –CD Section– ........... 15 3-3. Block Diagram –Tuner Section– ........16 2. DISASSEMBLY 3-4. Block Diagram –Display Section– ........17 3-5.

  • Page 4: General

    CDX-CA720X SECTION 1 GENERAL This section is extracted from instruction manual.

  • Page 5: Connections

    CDX-CA720X Connections...
  • Page 6 CDX-CA720X...

  • Page 7: Disassembly

    CDX-CA720X SECTION 2 DISASSEMBLY Note : This set can be disassemble according to the following sequence. 2-5. CHASSIS (T.U) ASSY 2-1. SUB PANEL ASSY (Page 9) (Page 7) 2-6. DISC IN BOARD 2-7. SERVO BOARD 2-2. CD MECHANISM BLOCK (Page 10)

  • Page 8: Cd Mechanism Block

    CDX-CA720X 2-2. CD MECHANISM BLOCK 6 bracket (CD) 7 CD mechanism block 5 PTT 2.6x4 2 PTT 2.6x4 1 PTT 2.6x4 4 CNP301 2-3. MAIN BOARD 4 PTT 2.6x6 6 MAIN board 5 PTT 2.6x6 1 PTT 2.6x4 2 PTT 2.6x4...

  • Page 9: Heat Sink

    CDX-CA720X 2-4. HEAT SINK 4 heat sink 3 PTT 2.6x10 2 PTT 2.6x16 1 PTT 2.6x10 2-5. CHASSIS (T.U) ASSY 2 P 2x3 3 P 2x3 1 Unsolder the 4 chassis (T.U) sub assy lead wires. black white...

  • Page 10: Disc In Board

    CDX-CA720X 2-6. DISC IN BOARD 4 guide (disc) 1 PS 2x3 2 DISC IN board 3 claws 2-7. SERVO BOARD 7 SERVO board 6 PS 2x4 5 PS 2x4 2 Removal the solders. 8 connector 1 CN3 3 P 2x3...

  • Page 11: Shaft Roller Assy

    CDX-CA720X 2-8. SHAFT ROLLER ASSY • When installing, take note of the positions arm (roller) and washers. (Fig. 1) 3 retaing ring (roller) bearing (roller) bearing (roller) 4 bearing (roller) washer (RA) retaing ring (roller) washer (RA) Fig. 1 5 shaft roller assy...

  • Page 12: Optical Pick-Up Block

    CDX-CA720X 2-10. OPTICAL PICK-UP BLOCK 4 P 2x3 1 P 2x3 5 leaf spring (feed) 2 sled motor assy 3 optical pick-up block 6 shaft (feed) assy...

  • Page 13: Diagrams

    Telephone ATT detection signal input NCO (VCC) Connect to power supply. UNISO Sony-Bus serial data signal output to bus interface (IC581) UNISI Sony-Bus serial data signal input from bus interface (IC581) UNICKO Sony-Bus serial clock signal output to bus interface (IC581)
  • Page 14 CDX-CA720X Pin No. Pin Name Pin Description TUNON Tuner power supply control signal output to power supply (IC601) PW ON System power supply control signal output to power supply (IC601) TSTB CD text parameter strob signal output to servo IC (IC1)

  • Page 15: Block Diagram -Cd Section

    CDX-CA720X 3-2. BLOCK DIAGRAM — CD SECTION — RF AMP,DIGITAL SERVO DIGITAL SIGNAL PROCESSOR OPTICAL PICK-UP KSS-720A (Page 16) TUNER SECTION LOUT SYSTEM CONTROL ROUT IC501(1/3) CONV R-CH DEMOD PACK 31 CD_PACK TSTB 51 TSTB DSUB CODE TSCK PROCESS CONV.

  • Page 16: Block Diagram -Tuner Section

    CDX-CA720X 3-3. BLOCK DIAGRAM — TUNER SECTION — PJ151 ELECTRONIC VOLUME BUS AUDIO IN AF AMP IC331 IC407 R-CH AUDIO OUT FRONT ACOUT RCH R-CH R-CH ACOUT LCH L-CH AMP AUDIO OUT REAR IC332 MUTE MUTE ACIN RCH R-CH Q171...

  • Page 17: Block Diagram -Display Section

    CDX-CA720X 3-4. BLOCK DIAGRAM — DISPLAY SECTION — 3-5. CIRCUIT BOARDS LOCATION SYSTEM CONTROL LCD DRIVE DISC IN board SUB board IC501 (3/3) IC901 KEY MATRIX KEY IN0 LSW902,904,905,907, LCD SO DATA LCD DATA SEG1 911,913,915,916,918,919 LCD CKO LCD CLK...

  • Page 18: Printed Wiring Boards -Cd Mechanism Section

    CDX-CA720X 3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 17 for Circuit Boards Location. THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) for schematic diagram: •...
  • Page 19 CDX-CA720X • Semiconductor Location Ref. No. Location TP77 TP78 TP62 TP82 TP48 TP66 TP80 TP84 TP83 TP60 TP11 TP12 TP50 TP81 TP47 TP64 TP59 TP10 TP51 (Page 25) TP89 TP52 TP71 TP56 TP58 TP22 TP72 TP24 TP23 TP25 TP61 TP76...

  • Page 20: Schematic Diagram -Cd Mechanism Section

    CDX-CA720X • Refer to page 17 for Waveforms. 3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 30 for IC Block Diagrams. TP77 TP78 TP89 TP79 TP80 TP81 TP82 TP45 TP10 TP83 TP44 TP84 TP43 TP42 TP41...

  • Page 21: Schematic Diagram -Main Section (1/3)

    CDX-CA720X 3-8. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) — • Refer to page 31 for IC Block Diagrams. R334 R335 R336 R339 R340 R341 TU10 IC332 IC333 C999 C339 C342 C340 R338 C341 R344 R337 C338 R332R333 C337 R343 C343...

  • Page 22: Schematic Diagram -Main Section (2/3)

    CDX-CA720X 3-9. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) — • Refer to page 32 for IC Block Diagram. PJ151 R461R463 C277 C276 R279 R281 C178 R459 C278 C274 Q271 C757 C756 IC B/D R274 IC751 R283 R432 C188 Q275 R431...

  • Page 23: Schematic Diagram -Main Section (3/3)

    CDX-CA720X Ver 1.1 • Refer to page 17 for Waveforms. 3-10. SCHEMATIC DIAGRAM — MAIN SECTION (3/3) — • Refer to page 32 for IC Block Diagram. (Page21) (Page22) Q613 R508 R650 Q650 (Page20) R357 C620 D650 L901 C303 CNP301...

  • Page 24: Printed Wiring Board -Main Section

    CDX-CA720X 3-11. PRINTED WIRING BOARD — MAIN SECTION — • Refer to page 17 for Circuit Boards Location. C757 C756 C288 C187 C287 C178 C242 C278 R275 R285 C784 C279 C188 D733 C177 Q271 Q171 Q281 C142 C785 R175 R185...
  • Page 25 CDX-CA720X PJ151 J561 CNJ581 CNP781 F901 IC751 L781 TU10 C623 C610 C303 C611 C334 C612 C307 C613 C614 C306 C615 C301 C335 C141 • Semiconductor Location C616 Ref. No. Location D781 IC601 F-10 IC751 Q351 G-10 C510 CN701 C551 S552...

  • Page 26: Printed Wiring Board -Relay Section

    CDX-CA720X 3-12. PRINTED WIRING BOARD — RELAY SECTION — • Refer to page 17 for Circuit Boards Location. LSW801 LED801 (Page 25) (Page 28)

  • Page 27: Schematic Diagram -Relay Section

    CDX-CA720X 3-13. SCHEMATIC DIAGRAM — RELAY SECTION — CNP801 CNP802 LSW801(1/2) (Page 29) LED801 (Page 23) LSW801(2/2)

  • Page 28: Printed Wiring Board -Key Section

    CDX-CA720X 3-14. PRINTED WIRING BOARD — KEY SECTION — • Refer to page 17 for Circuit Boards Location. R958 R926 R919 R922 R921 R931 R932 R981 R918 R968 Q904 R984 R967 D901 R985 R965 CN901 R960 R986 R905 R906 R930...

  • Page 29: Schematic Diagram -Key Section

    CDX-CA720X 3-15. SCHEMATIC DIAGRAM — KEY SECTION — RE901 R998 LED914 R995 LSW911(2/2) LSW913(2/2) R997 R920 R930 R996 R982 C959 C958 R983 IC971 R958 R959 R987 CN901 LSW902(2/2) LSW919(2/2) LSW915(2/2) R940 LED903 C971 D971 R931 R941 LSW904(2/2) LSW916(2/2) R932 R942...
  • Page 30 CDX-CA720X • IC BLOCK DIAGRAMS IC1 µPD63711GC-8EU IC2 BA5810FP-E2 BIAS 71 70 LOADING PRE OPIN4+ FWD REV – OPIN4– MICROCOMPUTER INTERFACE AGCI 50 C2D3 LDCONT COMPARATOR 49 C2D2 POWER CD-TEXT DECODER OPOUT4 SAVE 48 C2D1 SUB-CODE PROCESSOR OPIN3+ MEMORY 47 C1D2 –...
  • Page 31 CDX-CA720X IC331 TDA7406 32 31 30 29 28 27 26 25 MIXER SOFT STEP SOFT STEP SOFT STEP MONO FADER FADER FADER FADER CREF SUPPLY SACLK WOOFER FILTER OUTPUT SELECTOR SWIN ACIN-RCH 17 EXA-ATT ACOUT.RCH SWACOUT C-BUS QUAL. QUAL AC OUT.LCH...
  • Page 32 CDX-CA720X IC601 AN80T51 REFERENCE VOLTAGE ASO & PEAK CURRENT PROTECTION THERMAL PROTECTION DRIVE DRIVE DRIVE DRIVE DRIVE TUN-ON 10V-ON BU+B AMP+B ANT+B TU+B TU+B (5.8V) 8.7V (5.1V) (8.4V) IC581 BA8270F-E2 IC407 LA2902V SIGNAL AMP BUS ON – BUS ON 24 LF OUT...

  • Page 33: Exploded Views

    CDX-CA720X SECTION 4 EXPLODED VIEWS NOTE: The components identified by • The mechanical parts with no reference • Color Indication of Appearance Parts mark 0 or dotted line with mark number in the exploded views are not supplied. Example : 0 are critical for safety.

  • Page 34: Main Board Section

    CDX-CA720X 4-2. MAIN BOARD SECTION TU10 F901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3340-333-A MAIN BOARD, COMPLETE F901 1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A 3-236-285-01 HEAT SINK (REG) TU10 A-3220-812-A TUNER UNIT (TUX-020)

  • Page 35: Front Panel Section

    CDX-CA720X 4-3. FRONT PANEL SECTION not supplied (KEY board) LCD901 not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-236-267-11 BUTTON (R) 3-236-284-01 PLATE (LCD), GROUND 3-236-269-01 BUTTON (EQ7) 1-694-882-11 CONDUCTIVE BOARD, CONNECTION 3-037-267-01 SPRING (OPEN)

  • Page 36: Cd Mechanism Section (1)

    CDX-CA720X 4-4. CD MECHANISM SECTION (1) (MG-393XA-121//Q) not supplied supplied not supplied not supplied M903 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3315-247-B CHASSIS (T.U) ASSY 3-225-784-01 SPRING (RA3), TENSION 3-931-909-01 SPRING (LR), TENSION 3-933-152-03 ROLLER (S)

  • Page 37: Cd Mechanism Section (2)

    CDX-CA720X 4-5. CD MECHANISM SECTION (2) (MG-393XA-121//Q) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3378-956-8 ARM ASSY, CHUCKING 3-220-180-01 SPRING (TR2), TENSION 3-931-897-61 DAMPER (T) 3-931-881-03 LEVER (LOCK) 3-039-627-01 LEVER (D) 3-931-882-02 GEAR (MDL) 3-040-165-02 RETAINER (DISC)

  • Page 38: Cd Mechanism Section (3)

    CDX-CA720X 4-6. CD MECHANISM SECTION (3) (MG-393XA-121//Q) M901 M902 The components identified by Les composants identifiés par une mark 0 or dotted line with mark marque 0 sont critiques pour 0 are critical for safety. la sécurité. Replace only with part number Ne les remplacer que par une piéce...

  • Page 39: Electrical Parts List

    CDX-CA720X SECTION 5 DISC IN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by mark 0 or dotted line with mark the parts list may be different from the they are seldom required for routine service.
  • Page 40 CDX-CA720X LIMIT MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R912 1-216-819-11 METAL CHIP 1/16W < ROTARY ENCODER > R913 1-216-819-11 METAL CHIP 1/16W R914 1-216-821-11 METAL CHIP 1/16W RE901 1-477-144-12 ENCODER, ROTARY R915 1-216-823-11 METAL CHIP 1.5K...
  • Page 41 CDX-CA720X MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C183 1-126-163-11 ELECT 4.7uF C407 1-124-584-00 ELECT 100uF C184 1-109-982-11 CERAMIC CHIP C409 1-124-584-00 ELECT 100uF C185 1-109-982-11 CERAMIC CHIP C410 1-164-505-11 CERAMIC CHIP 2.2uF C186 1-125-891-11 CERAMIC CHIP 0.47uF...
  • Page 42 CDX-CA720X Ver 1.1 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark CNP301 1-764-617-12 PIN, CONNECTOR (PC BOARD) 30P IC751 8-759-827-14 IC TA8268AH CNP781 1-774-701-11 PIN, CONNECTOR 16P < JACK > < DIODE > 1-815-185-12 JACK (ANTENNA)
  • Page 43 CDX-CA720X MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-841-11 METAL CHIP 1/16W R356 1-469-844-11 INDUCTOR 2.2uH R142 1-216-821-11 METAL CHIP 1/16W R357 1-216-864-11 METAL CHIP 1/16W R143 1-216-833-11 METAL CHIP 1/16W R402 1-216-864-11 METAL CHIP...
  • Page 44 CDX-CA720X SERVO MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R536 1-216-845-11 METAL CHIP 100K 1/16W R690 1-216-864-11 METAL CHIP 1/16W R538 1-216-845-11 METAL CHIP 100K 1/16W R691 1-216-864-11 METAL CHIP 1/16W R541 1-216-845-11 METAL CHIP...
  • Page 45 CDX-CA720X SERVO SUB (CD) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-104-609-11 ELECT CHIP 100uF 1-216-833-11 METAL CHIP 1/16W 1-162-970-11 CERAMIC CHIP 0.01uF 1-216-840-11 METAL CHIP 1/16W 1-162-970-11 CERAMIC CHIP 0.01uF 1-216-835-11 METAL CHIP 1/16W 1-107-826-11 CERAMIC CHIP 0.1uF...
  • Page 46 CDX-CA720X Ref. No. Part No. Description Remark MISCELLANEOUS *************** 1-776-207-82 CORD (WITH CONNECTOR) (POWER) X-3378-598-1 CHASSIS (OP) ASSY (including M901) 1-659-880-11 MOTOR FLEXIBLE BOARD 0 260 8-820-103-11 PICK-UP, OPTICAL KSS-720A/C-RP F901 1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A M902 A-3291-674-A MOTOR ASSY, SLED (SLED)
  • Page 47 CDX-CA720X MEMO...
  • Page 48 CDX-CA720X REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 2002. 02 2003.

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