JVC KD-S721R Service Manual
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JVC KD-S721R Service Manual

JVC KD-S721R Service Manual

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3 7 63 1515 0
SERVICE MANUAL
KD-S723R/KD-S721R
TE
L 13942296513
Difference point
KD-S723R LCD Color,Button Illumination--- Amber
KD-S721R LCD Color,Button Illumonation--- Green
Contents
Safety precaution
Preventing static electricity
Important for laser products
www
Location of main parts
Disassembly method
.
http://www.xiaoyu163.com
CD RECEIVER
KD-S723R
TP/PTY
SEL
DISP
7
8
MO
KD-S721R
TP/PTY
SEL
DISP
7
8
MO
x
ao
u163
y
i
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
http://www.xiaoyu163.com
2 9
8
F M
¢
C D
4
A M
9
10
11
12
RPT
RND
MODE
SCM
Q Q
3
6 7
1 3
1 5
F M
¢
C D
4
A M
9
10
11
RPT
12
RND
MODE
SCM
1-2
Adjustment method
1-3
Flow of functional
1-4
operation unit TOC read
1-5
Maintenance of laser pickup
co
1-6
Replacement of laser pickup
.
Description of major ICs
KD-S723R/KD-S721R
9 4
2 8
COMPACT
0 5
8
2 9
9 4
2 8
DIGITAL AUDIO
Area Suffix
E -------- Continental Europe
EX ------------ Central Europe
1-11
1-12
m
1-14
1-14
1-15
9 9
9 9
No.49693
Feb. 2002

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Summary of Contents for JVC KD-S721R

  • Page 1 ¢ DISP MODE Difference point Area Suffix E -------- Continental Europe KD-S723R LCD Color,Button Illumination--- Amber EX ------------ Central Europe KD-S721R LCD Color,Button Illumonation--- Green Contents Safety precaution Adjustment method 1-11 Preventing static electricity Flow of functional 1-12 Important for laser products...

  • Page 2: Safety Precaution

    KD-S723R/KD-S721R 3 7 63 1515 0 Safety precaution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.

  • Page 3: Preventing Static Electricity

    KD-S723R/KD-S721R 3 7 63 1515 0 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

  • Page 4: Important For Laser Products

    KD-S723R/KD-S721R 3 7 63 1515 0 Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated.

  • Page 5: Location Of Main Parts

    KD-S723R/KD-S721R 3 7 63 1515 0 Location of main parts Control unit LED & key control board Display Main unit Main board ISO connector Antenna jack Tuner pack Power IC L 13942296513 Main board Connector to controller CD mechanism...

  • Page 6: Disassembly Method

    KD-S723R/KD-S721R 3 7 63 1515 0 Disassembly method Removing the front panel unit (See Fig.1) 1. Press the release button and remove the front panel unit in the direction of the arrow. Fig.1 Removing the front chassis (See Fig.2) 1.
  • Page 7 KD-S723R/KD-S721R 3 7 63 1515 0 CN501 Main amplifier board Removing the main amplifier board (See Fig.5 and 6) Remove the front chassis. Remove the bottom cover. Remove the two screws B attaching the main amplifier board assembly on the bottom of the body.

  • Page 8: Cd Mechanism Section

    KD-S723R/KD-S721R 3 7 63 1515 0 Damper bracket <CD mechanism section> CD mechanism assembly Removing the CD mechanism control board (See Fig.1 and 2) Unsolder the part a and b on the CD mechanism control board. Remove the stator fixing the CD mechanism control board and the damper bracket (To remove the stator smoothly, pick up the center part).
  • Page 9 KD-S723R/KD-S721R 3 7 63 1515 0 Damper bracket assembly CD mechanism Removing the CD mechanism assembly (See Fig.1, 6 to 9) Prior to performing the following procedure, remove the CD mechanism control board and the front bracket (loading motor).

  • Page 10: Removing The Pickup Unit

    KD-S723R/KD-S721R 3 7 63 1515 0 Removing the feed motor assembly FD screw Part i Feed motor assembly (See Fig.10) Prior to performing the following procedure, remove the CD mechanism control board, the front bracket Part j (loading motor) and the CD mechanism assembly.

  • Page 11: Adjustment Method

    6. Digital tester MW 522kHz ~ 1620 kHz 7. Tracking offset meter LW 144kHz ~ 279kHz 8. Test Disc JVC :CTS-1000 9. Extension cable for check EXTGS004-26P 1 Dummy load Exclusive dummy load should be used for AM,and FM. For FM dummy load,there is a loss of 6dB between SSG output and antenna input.The loss of 6dB need not be considered...

  • Page 12: Flow Of Functional Operation Until Toc Read

    KD-S723R/KD-S721R 3 7 63 1515 0 Flow of functional operation until TOC read Power ON • When the laser diode correctly Set Function to CD • When the pickup correctly moves emits to the inner area of the disc...

  • Page 13: Feed Section

    KD-S723R/KD-S721R 3 7 63 1515 0 Feed Section Check CD 9V Is the voltage output at Is the wiring for IC541 Is 5V present at IC501 and 5V. IC541 pin "53" 5V or 0V? (90) ~ (100) correct? pin "20"? Check the vicinity of IC541.

  • Page 14: Maintenance Of Laser Pickup

    KD-S723R/KD-S721R 3 7 63 1515 0 Maintenance of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear.

  • Page 15: Description Of Major Ics

    KD-S723R/KD-S721R 3 7 63 1515 0 Description of major ICs HA13164A(IC901):Regulator 1.Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2.Block diagram Surge Protector BIAS L 13942296513 UNIT R: note1) TAB (header of IC) connected to GND 3.Pin function...
  • Page 16 3 7 63 1515 0 UPD178078GF-561 (IC701) : System CPU 1.Pin layout 2.Pin function (1/2) Symbol FUNCTION No connection BUSINT JVC bus communication line BUSSI JVC bus communication line BUSSO JVC bus communication line JBUS-SCK JVC bus communication line No connection...
  • Page 17 KD-S723R/KD-S721R 3 7 63 1515 0 2.Pin function (2/2) UPD178078GF-561 Symbol FUNCTION GNDPLL AMEQ PLL error output for AM FMEQ PLL error output for FM IC(VPP) Setting to write for flash RESET System reset CD mech switch REMOCON Remocon input...
  • Page 18 KD-S723R/KD-S721R 3 7 63 1515 0 LA4743K(IC302):Power AMP 1.Block diagram 2200 F 0.022 F 0.22 F Protective circuit 0.22 F L 13942296513 Stand by Switch ST ON Mute Ripple Mute Filter 47 F circuit 3.3 F Low Level Mute ON 0.22 F...
  • Page 19 KD-S723R/KD-S721R 3 7 63 1515 0 2.Terminal layout 3.Pin function LA4743K Pin No. Symbol Function Header of IC Power GND GND1 OUTRR- Outpur(-) for front Rch STBY Stand by input Output (+) for front Rch OUTRR+ Power input VCC1/2...
  • Page 20 KD-S723R/KD-S721R 3 7 63 1515 0 LA6567H-X(IC501):CD DRIVER 1.Pin layout & blockdiagram CH 3,4,5 Thermal shutdown VCC2 Power supply V05- V05+ S-GND V04+ VCONT V04- VIN4 V03+ VIN4G Signal system power supply V03- VCC-S L 13942296513 V02+ VREF-IN 5VREG(PNPTr...
  • Page 21 KD-S723R/KD-S721R 3 7 63 1515 0 2. Pin function LA6567H-X(2/2) Pin no. Symbol Function VCC2 CH3,4,5 Power supply( It is short with VCC1,VCC-S) V05- Loading output(-) V05+ Loading terminal (+) V04+ CH4 Output terminal(+) V04- CH4 Output terminal(-) V03+...

  • Page 22: Pin Function

    KD-S723R/KD-S721R 3 7 63 1515 0 TC9462F(IC541):DSP&DAC 1.Pin layout & Block Diagram Servo 1bit control Clock generator Digital equalizer Address circuit Automatic adjustment circuit Micon interface Correction CLV servo circuit Data 16KRAM slicer Synchronous guarantee EFM decode Audio out...
  • Page 23 KD-S723R/KD-S721R 3 7 63 1515 0 TC9462F(2/3) Symbol Pin No. Function Remarks 2-state output 2/4 times speed at "VREF" voltage. HSSW (PVREF,HiZ) 1 bit DA converter zero detect flag output terminal. ZDET Phase difference signal output terminal of EFM 3-state output.
  • Page 24 KD-S723R/KD-S721R 3 7 63 1515 0 TC9462F(3/3) Symbol Pin No. Function Remarks Test input terminal, Normally, keep at "L" level Analog input. TESIN Test input/output terminal. Normally, keep at "L" level Analog input. TESIO1 Digital GND terminal Crystal oscillator connecting input terminal for DSP...
  • Page 25 KD-S723R/KD-S721R 3 7 63 1515 0 SAA6579T-X(IC71):RDS Detector 1.Pin layout QUAL DATA Vref OSCO OSCI TEST SCOUT MODE 2.Block diagram ANTI- 57 kHz OSCILATOR QUALITY BIT RECONSTRUCTION ALIASING BANDPASS GENERATOR FILTER FILTER (8th ORDER) DIVIDER COSTAS LOOP BIPHASE CLOCKED...

  • Page 26: Block Diagram

    KD-S723R/KD-S721R 3 7 63 1515 0 TA2109F-X (IC501) : RF amp. 1. Pin layout 2. Block diagram 15k ohm 30k ohm 7.67k ohm 15k ohm 10k ohm SBAD 10k ohm 20uA 50k ohm 30k ohm 20pF 36pF 10k ohm...
  • Page 27 KD-S723R/KD-S721R 3 7 63 1515 0 LC75823W (IC601) : LCD driver 1. Pin Layout & Symbol 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2.
  • Page 28 KD-S723R/KD-S721R 3 7 63 1515 0 TEA6320T-X (IC161) : E.volume 1.Pin layout 2.Block diagram VOLUME 2 MUTE 0 to 55 dB FUNCTION BALANCE OUTRR OUTLR ZERO CROSS FENDER REAR POWER DETECTOR OUTFR OUTLF SUPPLY VOLUME 1 BASS TREBLE +20 to -31 dB...
  • Page 29 KD-S723R/KD-S721R 3 7 63 1515 0 HD74HC126FP-X (IC801) : Buffer 1.Terminal layout 3.Pin function Input Output Note) H:High level L:Low level X:Irrelevant Z:Off(High-impedance) State a 3-state input 2.Block diagram Output Input L 13942296513 Output Sample as Load Circuit 1...
  • Page 30 KD-S723R/KD-S721R 3 7 63 1515 0 L 13942296513 u163 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200202 (No.49693) http://www.xiaoyu163.com...

  • Page 31: Tuner Pack

    KD-S723R/KD-S721R 3 7 6 3 1 5 1 5 0 VA, VB, VC, VE VF, MD, LD SEL,TEB RF,RFRP Pickup FE,SBAD IC521 IC541 IC581 TE,RFGO L-CH CD LPF RF AMP DSP & DAC R-CH CD_L BUS0~3, BUCK FEED CD_R...
  • Page 32 KD-S723R/KD-S721R 3 7 63 1515 0 < M E M O > L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 33: Standard Schematic Diagrams

    KD-S723R/KD-S721R 3 7 6 3 1 5 1 5 0 Standard schematic diagrams Receiver & System control section QAU0222-001 QNB0100-002 COMP.OUT 0.022 4.7u C189 1/50 R187 C191 IC301 1/50 LA4743K C169 1/50 R167 Q181 2SD601A C171 1/50 2SD601A 0.1/50...
  • Page 34 KD-S723R/KD-S721R KD-S723R/KD-S721R 3 7 6 3 1 5 1 5 0 Mecha control circuit section R586 R508 R584 R581 C582 4.7/25 R585 1.5K C584 R-CH 120P R507 8.2k C581 820P D501 DSK10C R504 R501 8.2k R506 D502 DSK10C IC581...
  • Page 35 KD-S723R/KD-S721R 3 7 6 3 1 5 1 5 0 LCD driver & Operation switch section IC602 RPM6938-SV4 C611 C612 0.012 4.7/6.3 UDZS5.1B-X CJ601 D644 VMC0335-001 R661 LCD1 QLD0210-002 ILL10V ACC5V REMOCON BUS3 LCDCL LCDDA IC601 LC75823W LCDCE KEY0...

  • Page 36: Printed Circuit Boards

    KD-S723R/KD-S721R KD-S723R/KD-S721R 3 7 6 3 1 5 1 5 0 Printed circuit boards Main board(Forward side) Main board(Reverse side) L961 MEM.DET SW5V ACC.IN REMOTE IC961 ANTCTRL CP961 J301 IC961 R904 TEL-MUTE C901 CP961 Q321 Q351 D910 Q331 L961...

  • Page 37: Parts List

    KD-S723R/KD-S721R 3 7 63 1515 0 PARTS LIST [ KD-S723R ] [ KD-S721R ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E ----------- Continental Europe EX --------------- Central Europe L 13942296513...

  • Page 38: Exploded View Of General Assembly And Parts List

    KD-S723R/KD-S721R 3 7 63 1515 0 Exploded view of general assembly and parts list Block No. L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 39: Lock Lever

    FSXP3026-002 RLS KNOB COMP.SPRING FSKW3002-015 BLIND FSPK3009-002 FRONT PANEL GE10037-001A GE30300-006A FINDER ASSY 1 KD-S723R GE30300-007A FINDER ASSY 1 KD-S721R GE20119-001A PRESET BUTTON GE30304-001A POWER BUTTON GE30305-001A EJECT BUTTON GE20131-001A D.FUNC BUTTON 1 FM/CD/AM L 13942296513 GE30307-001A SND FTN BUTTON...

  • Page 40: Cd Mechanism Assembly And Parts List

    KD-S723R/KD-S721R 3 7 63 1515 0 CD mechanism assembly and parts list Block No. Grease TN-CCD1001Z-136J G-31SA G-31SA(Bottom side) RX-405 L 13942296513 u163 106 29 http://www.xiaoyu163.com...
  • Page 41 KD-S723R/KD-S721R 3 7 63 1515 0 Parts list (CD mechanism) Block No. MBMM Item Description Parts number Parts name Q'ty Area 30310101T FRAME 30310103T DANPER PIN 30310107T UPPER PLATE 30310108T SEL STOP PLATE 30310142T SEL ARM (L)L SEL ARM (R)L...
  • Page 42 KD-S723R/KD-S721R 3 7 63 1515 0 Parts list (CD mechanism) Block No. MBMM Item Description Parts number Parts name Q'ty Area 64180403T DET SWITCH 2 ESE22MH3 68150232T CONNECTOR 1 TKC-W26X-C1 30311105T SOPPORT PLATE 30311138T GR MT BLK(N) 30311109T LDG GEAR (2)
  • Page 43 KD-S723R/KD-S721R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area NDC31HJ-5R0X C CAPACITOR C 331 QERF1HM-225Z E CAPACITOR 2.2MF 20% 50V...
  • Page 44 KD-S723R/KD-S721R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 591 NCS31HJ-821X C CAPACITOR D 784 UDZ11B-X ZENER DIODE C 592...
  • Page 45 KD-S723R/KD-S721R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area R 10 NRS181J-8R2X MG RESISTOR R 503 NRSA63J-242X MG RESISTOR R 31...
  • Page 46 KD-S723R/KD-S721R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area R 715 NRSA63J-103X MG RESISTOR R 716 NRSA63J-103X MG RESISTOR R 717 NRSA63J-103X MG RESISTOR R 718 NRSA63J-103X...
  • Page 47 KD-S723R/KD-S721R 3 7 63 1515 0 Electrical parts list (Front board) Block No. 02 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 601 NCB31HK-223X C CAPACITOR R 609 NRSA02J-182X MG RESISTOR KD-S721R...

  • Page 48: Packing Materials And Accessories Parts List

    KD-S723R/KD-S721R 3 7 63 1515 0 Packing materials and accessories parts list Block No. Block No. E version A2~A6 EX version A1,A3,A5,A6 L 13942296513 E version A1 P5 A15 KIT:A8~A12 u163 3-12 http://www.xiaoyu163.com...
  • Page 49 FSYH4036-068 SHEET POLY BAG QPA01003003 1 CAR CABLE POLY BAG 1 SET QPC03004315P GE30407-016A CARTON 1 KD-S723R GE30407-015A CARTON 1 KD-S721R GE10036-001A ESP CUSHION Parts list (Accessories) Block No. M5MM Item Parts number Parts name Q'ty Description Area GET0065-001A INST.BOOK...

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