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MDX-CA680/CA680X
SERVICE MANUAL US Model
MDX-CA680X
Ver 1.1 2001.05
AEP Model
UK Model
MDX-CA680/CA680X
Photo: MDX-CA680X (US model)
U.S. and foreign patents licensed from Dolby laboratories
Model Name Using Similar Mechanism NEW
Licensing Corporation.
Base Mechanism Type MG-164MA-138
Optical Pick-up Name KMS-241C
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS (US model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
23 watts per channel minimum continuous average power into 4 ohms,
4 channels driven
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MDX-CA680/CA680X TABLE OF CONTENTS NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT 1. GENERAL The laser diode in the optical pick-up block may suffer electro- Location of Controls ....................................................... 3 static break-down because of the potential difference generated Setting the Clock ............................................................. 4 by the charged electrostatic load, etc. on clothing and the human body. 2. DISASSEMBLY During rep
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T E S REP E AF TA OFF R 3 PTY 2 OPEN MDX-CA680/CA680X SECTION 1 This section is extracted from instruction manual. GENERAL Location of controls Refer to the pages listed for details. : During Playback : During radio reception : During menu mode CD/MD RADIO MENU 1 S D MBP SOURCE LIST MENU SEEK SEEK D–BASS MODE SOUND ENTER 4 (AEP, UK models) a Volume control dial 16 n Number buttons b MBP button 22 CD/MD (3) REP 10 c Z (eject) button (located on the front side (6) SHUF 10 of the unit, behind
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T E S E AF TA OFF R PTY OPEN MDX-CA680/CA680X Setting the clock The clock uses a 12-hour (US model) or 24-hour (AEP, UK models) digital indication. S D Example: To set the clock to 10:08 LIST MENU 1 Press (MENU), then press either side SEEK SEEK of (DISC/PRESET) repeatedly until SOUND ENTER “CLOCK” appears. 1Press (ENTER). The hour indication flashes. (DISC/PRESET) (+): to select upwards 2Press either side of (DISC/PRESET) to set the hour. 3Press the (+) side of (SEEK). (SEEK) (SEEK) The mi
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MDX-CA680/CA680X 2 A AUDIO OUT FRONT AUDIO OUT REAR B BUS AUDIO IN BUS CONTROL IN BUS AUDIO IN TV tuner unit* Syntoniseur de télévision* BUS CONTROL IN Source selector* Sélecteur de source* * not supplied non fournis (US model) Cautions Connection example (2) •This unit is designed for negative ground 12 V Notes (2-A) • Be sure to connect the ground cord before DC operation only. connecting the amplifier. •Do not get the wires under a screw, or caught • If you connect an optional power amplifier
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MDX-CA680/CA680X (US model) 3 RCA pin cord (not supplied) Cordon à broche RCA (non fourni) Source selector Supplied with the CD/MD changer Sélecteur de source Fourni avec le changeur de CD/MD Supplied with XA-C30 Fourni avec le XA-C30 AUDIO OUT FRONT BUS AUDIO IN REMOTE IN L * Insert with the cord upwards. R Insérez avec le câble vers le haut. from car antenna adaptor * BUS AUDIO OUT AUDIO OUT AUDIO REAR FRONT à partir de l’adaptateur de l’antenne de la voiture AUDIO OUT Fuse (10 A) BUS REAR Fus
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MDX-CA680/CA680X (AEP, UK Models) 1 * Note for the aerial connecting If your car aerial is an ISO (International Organisation for Standardisation) type, use the 3 supplied adaptor 6 to connect it. First connect the car aerial to the supplied adaptor, then connect it to the aerial jack of the master unit. 2 * Insert with the cord upwards 3 * RCA pin cord (not supplied) 1 * Hinweis zum Anschließen der Antenne 3 Source selector (not Wenn Ihre Fahrzeugantenne der ISO-Norm (ISO = International Organi
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MDX-CA680/CA680X 4AB c 1 2 2 5 1 2 3 4 Dashboard Tableau de bord 3 1 4 7 Fire wall Paroi ignifuge 5 5 6 Bend these claws outward for a tight fit, if necessary. 1 Pliez ces griffes pour assurer une prise correcte si 6 nécessaire. 6 5 Precautions Mounting the unit in a Japanese Précautions Installation de l’appareil dans car (6) une voiture japonaise (6) •Choose the installation location carefully so •Choisissez soigneusement l’emplacement that the unit will not interfere with normal d’installatio
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MDX-CA680/CA680X (AEP, UK models) Power connection diagram Diagramma dei collegamenti di Auxiliary power connector may vary depending on alimentazione the car. Check your car’s auxiliary power connector Il connettore di alimentazione ausiliaria può variare diagram to make sure the connections match a seconda della macchina. Auxiliary power connector correctly. There are three basic types (illustrated Controllare il diagramma del connettore di Hilfsstromanschluß below). You may need to switch the
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MDX-CA680/CA680X SECTION 2 DISASSEMBLY • This set can be disassembled in the order shown below. 2-1. DISASSEMBLY FLOW Note 1: The process described in can be performed in any order. Note 2: Without completing the process described in , the next process can not be performed. Note 3: Illustration of disassembly is omitted. SET FRONT PANEL ASSY 2-9. LO MOTOR ASSY (LOADING) (M903) (Note 3) (Page 14) 2-2. SUB PANEL ASSY 2-10. LEVER (LE23) ASSY (Page 10) (Page 14) 2-3. MECHANISM DECK (MG-164
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MDX-CA680/CA680X 2-3. MECHANISM DECK (MG-164MA-138) 3 two screws (PTT2.6 × 4) 4 bracket (MD) 5 mechanism deck (MG-164MA-138) 1 screw 2 connector (PTT2.6 × 4) (CNP301) 1 screw (PTT2.6 × 4) 2-4. MAIN BOARD 2 three screws (PTT2.6 × 4) 1 three ground point screws (PTT2.6 × 6) 3 main board 11
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MDX-CA680/CA680X 2-5. HEAT SINK 1 screw (PTT2.6 × 10) 2 two screws (PTT2.6 × 16) 3 heat sink 1 two screws (PTT2.6 × 10) 2-6. SERVO BOARD 2 two screws (BVTT2 × 4) 2 two screws (BVTT2 × 4) 3 servo board 1 flexible flat (11core) cable (CN103) 1 optical pick-up flexible board (CN102) 12
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MDX-CA680/CA680X 2-7. MD COVER ASSY 1 four screws (BVTT2 × 4) 3 MD cover assy shaft (MD cover guide) cassette holder A 2 Pushing the cassette holder in the direction of the arrow A with a screwdriver, etc., disengage the shaft (MD cover guide) from the slot in the MD cover assy. Note: Take care not to scratch the optiocal pick-up when pushing the cassette holder with a screwdriver. etc. 2-8. FLOAT BLOCK 3 Pushing an arrow A part, raise the float block up ward at the front to release a lock.
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MDX-CA680/CA680X 2-9. LO MOTOR ASSY (LOADING) (M903) 4 Remove the bracket (LO) in the direction of the arrow A. A 5 LO motor assy (loading) 1 Remove solders of motor (M903). (M903) 2 tension spring (rack) 3 claw bracket (LO) – bottom view – 2-10. LEVER (LE23) ASSY 2 stopper washer 3 lever (LE23) assy 4 roller (gear E) 1 14
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MDX-CA680/CA680X 2-11. HOLDER ASSY 4 Remove the holder assy in the direction of the arrow. 2 type-E stop ring 1.5 1 spring (chucking) 2 type-E stop ring 1.5 2 type-E stop ring 1.5 3 lever (lock R) 3 lever (lock L) 1 spring (chucking) 2 type-E stop ring 1.5 2-12. CHUCKING ARM ASSY 1 Remove the chucking arm assy in the direction of the arrow. holder assy 15
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MDX-CA680/CA680X 2-13. OPTICAL PICK-UP (KMS-241C) 4 screw (B2 × 3) 6 bearing (SL) 5 feed screw assy 7 optical pick-up (KMS-241C) 1 two screws 3 screw (K2 × 3) (K2 × 3) 2 guide shaft (OPT L) 2-14. SL MOTOR ASSY (SLED) (M902), SP MOTOR ASSY (SPINDLE) (M901) 4 screw (P1.7 × 1.8) 9 two screws (P1.7 × 1.8) 5 bracket (SL) 2 two screws (2 × 8) 6 SL motor assy (sled) (M902) 0 bracket (SP) 7 screw 3 sensor board (B2 × 3) qa SP motor assy 8 base (SL) (spindle) (M901) 1 Remove solders of motors (M901
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MDX-CA680/CA680X SECTION 3 ELECTRICAL ADJUSTMENTS TEST MODE This set have the test mode function. 1. Turn ON the regulated power supply. (The clock is displayed) Note: Press the [OFF] button, if the clock is not displayed. 2. Push the preset [4] button. 3. Push the preset [5] button. 4. Press the preset [1] button for more than two seconds. 5. Then the display indicates all lights, the test mode is set. 1. Push the [OFF] button. MD SECTION MD secti
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MDX-CA680/CA680X SECTION 4 DIAGRAMS • IC Block Diagrams – SERVO Board – IC101 PCM1718E/2K CLK XTI 1 20 XTO CONTROL DGND 2 19 CLKO INPUT INTERFACE VDD 3 18 MUTE MODE CONTROL DIGITAL LRCIN 4 17 DM1 FILTER DIN 5 16 DM0 NOISE SHAPER BCKIN 6 15 RSTB 5 LEVEL 5 LEVEL ZERO 7 14 FORMAT DAC DAC D/C_R 8 13 D/C_L LOWPASS LOWPASS FILTER FILTER VOUTR 9 12 VOUTL CMOS CMOS AGND 10 11 VCC AMP AMP IC301 CXD2662R 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 PWM SPINDLE GENERATOR SER
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MDX-CA680/CA680X IC302 CXA2523AR 48 47 46 45 44 43 42 41 40 39 38 37 USROP – + RF AGC EQ + – USRC RFA1 DET EQ BPF3T RFA2 RFA3 AUX PEAK3T I 1 – HLPT –1 SW 1 3T – P-P – 2 –2 – J 2 3T WBL OFST PTGR TEMP PEAK – 1 – –2 2 CVB BOTTOM 36 BOTM – PBH –1 VC 3 GRV GRVA PBSW WBL 35 ABCD 34 FE – + A 4 – 33 AUX – – AA IVR BPFC – ABCDA 32 ADFG + B 5 31 ADAGC – BB IVR + + 30 ADIN – – FEA + C 6 – CC IVR DET BPF22 – ADIP – WBL 29 ADFM + AGC + ATA + D 7 – DD IVR WBL –1 TG 28 SE PTGR – –2 + E 8 SEA + + EE' – – EE 27
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MDX-CA680/CA680X IC303 BH6518FS-E2 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 AMP AMP AMP AMP VDD INTERFACE INTERFACE CHARGE PREDRIVE PREDRIVE PUMP. OSC PREDRIVE PREDRIVE INTERFACE AMP AMP AMP AMP INTERFACE PSB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 IC305 BA6287F OUT1 1 8 GND VM 2 7 OUT2 DRIVER DRIVER TSD VCC 3 6 VREF CONTROL LOGIC POWER SAVE FIN 4 5 RIN IC307 MSM51V4400E-70TS-K TIMING 26 VSS TIMING GENERATOR GENERATOR DQ1 1 25 DQ4 DQ2 2 24 DQ3 3 WE 23 CAS RAS 4 WRITE 22 OE 5 A9 COLUMN I/O
