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CONTENTS
TO SERVICE PERSONNEL ..................................... 1~2
REAR PANELS ............................................................. 3
SPECIFICATIONS ......................................................... 4
INTERNAL VIEW .......................................................... 4
DISASSEMBLY PROCEDURES .............................. 5~6
STANDARD OPERATION CHART .......................... 7~8
TEST MODE ............................................................ 9~11
ADJUSTMENT ............................................................. 12
ERROR MESSAGES ............................................ 13~15
IC DATA ................................................................ 16~20
このサービスマニュアルは、エコマーク認定の再生紙を使用しています。
This Service Manual uses recycled paper.
1 0 0 6 6 9
COMPACT DISC PLAYER
CDC-775
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are
already known and understood by the users, and have therefore not been restated.
WARNING:
Failure to follow appropriate service and safety procedures when servicing this product may result in
personal injury, destruction of expensive components, and failure of the product to perform as specified.
For these reasons, we advise all YAMAHA product owners that any service required should be performed
by an authorized YAMAHA Retailer or the appointed service representative.
IMPORTANT:
The presentation or sale of this manual to any individual or firm does not constitute authorization,
certification or recognition of any applicable technical capabilities, or establish a principle-agent
relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering,
and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore,
inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to
exist, please contact the distributor's Service Division.
WARNING:
Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this
buss).
IMPORTANT:
Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to
the unit.
Copyright 2002 YAMAHA CORPORATION
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
SERVICE MANUAL
SERVICE MANUAL
IMPORTANT NOTICE
DISPLAY DATA .......................................................... 21
IC BLOCKS ........................................................... 22~23
PIN CONNECTION DIAGRAM ................................... 23
BLOCK DIAGRAM ................................................ 24~25
PRINTED CIRCUIT BOARD ................................. 26~31
SCHEMATIC DIAGRAM ............................................. 32
PARTS LIST .......................................................... 33~42
GREASE APPLICATION DIAGRAM .......................... 43
REMOTE CONTROL TRANSMITTER ........................ 44
CDC-775

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Table of Contents
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Summary of Contents for Yamaha CDC-775

  • Page 1: Table Of Contents

    This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users, and have therefore not been restated.
  • Page 2: To Service Personnel

    CDC-775 TO SERVICE PERSONNEL AC LEAKAGE 1. Critical Components Information. WALL EQUIPMENT T E S T E R O R Components having special characteristics are marked and OUTLET UNDER TEST EQUIVALENT must be replaced with parts having specifications equal to those originally installed.
  • Page 3 CDC-775 R, G models R, G models CLASS 1 LASER PRODUCT English THIS PRINTING (SEE POSITION SHOWN IN THE ILLUSTRATION) INFORMS THE USER THAT THE APPARATUS CONTAINS A LASER COMPONENT. THIS LABEL (SEE POSITION SHOWN IN THE ILLUSTRATION) WARNS THAT ANY FURTHER PROCEDURE WILL BRING THE USER INTO EXPOSURE WITH THE LASER BEAM.
  • Page 4: Rear Panels

    CDC-775 REAR PANELS U, C models R model A model G model...
  • Page 5: Specifications

    CDC-775 SPECIFICATIONS INTERNAL VIEW P.C.B. MAIN (2) AUDIO SECTION CLAMP ASS’Y Output Voltage 2.0±0.5V CM-210 UNIT S/N Ratio 115dB P.C.B. MAIN (1) Dynamic Range 100dB Harmonic Distortion+Noise (1kHz) 0.0025% TRAY ASS’Y ±0.5dB Frequency Response (2Hz~20kHz) Headphone Output 150Ω, 1kHz, –20dB Input 200±40mV...
  • Page 6: Disassembly Procedures

    CDC-775 DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) 1. Removal of Top Cover 4. Removal of Table a. Remove 4 screws ( q ) and also 3 screws ( w ) as a. Remove 1 screw ( t ) and then remove the Support/ shown in Fig.
  • Page 7 CDC-775 6. Removal of PU Mechanism Unit 5. Removal of CM-210 Unit a. Remove 2 screws ( i ) and then remove the PU a. Remove 5 screws ( u ) as shown in Fig. 3. Unit Ass'y as shown Fig. 4.
  • Page 8: Standard Operation Chart

    CDC-775 STANDARD OPERATION CHART Press OPEN/CLOSE key. “OPEN” appears on the display. Forced feed return operation. “TRV” signal is output until detection of LIMIT switch. Proceeds to next step after detection of CLAMP switch. (SW400) Clamp down operation. Disc table reset.
  • Page 9 CDC-775 FOCUS GAIN ADJ. TRACKING GAIN ADJ. *TOC READ ~ Data fetch cycle ~ TRACK No. “1” is searched. : MUTE OFF = “L” → “H”, “0:00” appears on the display. After searching the beginning, MUTE is cancelled. (IC301, pin 4) ~ PLAY ~ Set to SEARCH by means of Y,Tkey.
  • Page 10: Test Mode

    CDC-775 TEST MODE Starting TEST mode Test mode is brought about when the power is turned on while the “PLAY/PAUSE” and “STOP” keys on the panel are simultaneously pressed and held. When the test mode is brought about, all the displays light up for about 1 second. ("TEST" on display) NOTE : To fully operate all test modes the remote control must be used.
  • Page 11 CDC-775 Function List of Remote Control Transmitter CUSTOM CODE = (79)x CODE FUNCTION MODE Traverse stop OPEN/CLOSE Tray open/close PLAY (FOON, TRON, TVON (FEON), SPON) PLAY Backward traverse move. (If inner SW turns on, traverse is stopped.) TSKIP (Coefficient set up mode : upper digit down) Clamp down.
  • Page 12 CDC-775 (Note 2) Display at time measurement. The time display shows the time for 1 rotation of the turn table. The unit of time is 0.1 second (rotate fast) or 1 second (rotate slow). (Note 3) Checks FL display. DIMMER...
  • Page 13: Adjustment

    CDC-775 ADJUSTMENTS Necessary items Jitter Adjustment Measuring instruments Connect an oscilloscope and a jitter meter to the test Oscilloscope : x 1 points EFM and GND. (Band width of 50MHz or more) Set to the TEST mode. Jitter meter : x 1 (While pressing both the “PLAY/PAUSE”...
  • Page 14: Error Message

    CDC-775 ERROR MESSAGE When stopped by any cause, press “STOP” of the remote control while pressing and holding the “STOP” on the panel key. The operation mode turns to the mode allowing the display of messages. (The error messages are cleared with the power off.) Error Messages List * Meaning of each state (“X”) :...
  • Page 15 CDC-775 X8 ....Error code Focus drops. 2) Troubleshooting from System Malfunctions. a) Tray fails to come out/go in. Check by using Is disc dirty or Poor mechanism operation. another disc. scratched? Tray starts to Wire caught. move but stops.
  • Page 16 CDC-775 d) Sound skips. c) Operates as if no disc loaded. (Time display fails to advance properly) (although loaded) Does table Is disc dirty, Check by using a Poor table rotation. rotate properly? scratched or known good disc. warped? Infrared sensor defective.
  • Page 17: Ic Data

    CDC-775 IC DATA µ IC301 : PD78P078GF-3BA µ 8bit -COM Name Function Port OPSW Opened state of tray sensing switch input. Opened state at “L”. P120/RTP0 Closed state of tray sensing switch input. Closed state at “L”. CLSW P121/RTP1 Table position detect signal input.
  • Page 18 CDC-775 µ IC301 : PD78P078GF-3BA µ 8bit -COM Port Name Function P13/ANI3 P14/ANI4 P15/ANI5 N.C. P16/ANI6 P17/ANI7 AVSS AVSS P130/ANO0 EQSW AN8849 equalizer control. P131/ANO1 GCTRL AN8849 gain control. AVREF1 P70/S12/RXD Serial I/F input (SUBQ) SUBQ P71/SO2/TXD STAT Status signal input from MN35511.
  • Page 19 CDC-775 µ IC301 : PD78P078GF-3BA µ 8bit -COM Port Name Function P67/ASTB N.C. Table couterclockwise rotate signal output. P100/TI5/TO5 TBL-L P101/TI6/TO6 TBL-R Table clockwise rotate signal output. P102 N.C. P103 N.C. P30/TO0 Tray close signal output. CLOSE P31/TO1 OPEN Tray open signal output.
  • Page 20 CDC-775 IC3 : MN35511 Signal Processor & Controller Pin No. Name Function BCLK Bit clock output for SR DATA LRCK L/R identification signal output SRDATA Serial data output DVDD1 Power supply for digital circuit (+5) DVSS1 GND for digital circuit...
  • Page 21 CDC-775 IC3 : MN35511 Signal Processor & Controller Pin No. Name Function DSLF Loop filter terminal for DSL PLLF Loop filter terminal for PLL VCOF Loop filter terminal for VCO (+5) AVDD2 Power supply for analog circuit (for AD of DSL, PLL, DA output blocks)
  • Page 22: Display Data

    CDC-775 DISPLAY DATA (V3008400) &6 V300 : 15-ST-20G PATTERN AREA • PIN CONNECTION NOTE 1) F1, F2 ..Filament 4) P1~P18 ..Datum Line 2) NP ..... No pin 5) 1G~15G ..Grid 3) NX ..... No extend pin 6) IC ....Internal connection •...
  • Page 23: Ic Blocks

    CDC-775 IC BLOCKS IC1 : AN8849SB IC2 : M56748FP Digital Servo Head Amp 4-Channel BTL Driver STAND VREF-IN STAND BY VREF-OUT SS. GND DETECTION RF-AGC N. C. STAND BY CBDO GAIN 1 GAIN 4 RFDET COFTR VCTL 1 (–) VCTL 4 (–)
  • Page 24: Pin Connection Diagram

    IC401 : LA6510 IC302 : X25642P Dual Power Operational Amp Electrically Erasable PROM WRITE X DECODE 1K BYTE STATUS PROTECT REGISTER LOGIC ARRAY LOGIC 10 7 64×256 COMMAND DECODE 64×256 CONTROL LOGIC HOLD VOUT1 VOUT2 VSENSE1 VSENSE2 WRITE 128×256 CONTROL TIMING LOGIC Y DECODE...
  • Page 25: Block Diagram

    CDC-775 BLOCK DIAGRAM PICK UP IC102 IC102 SRDATA IC101 IC100 Q100 Q101 HEAD YAC514 LRCK LINE OUT CONTROL Q102 Q103 IC104 IC104 AN8849SB IC103 LD ON LASER BCLK 21 3 VREF2 VREF1 MN35511 GCTRL IC105 MUTE EQSW XL100 ZFLG CONTROL...
  • Page 26: Printed Circuit Board

    CDC-775 PRINTED CIRCUIT BOARD (Foil side) Point q (Pin 59 of IC3) V : 2V/div, H : 50nsec/div DC, 1 : 1 probe P. C. B. MAIN ( 1 ) FROM : PICK UP HEAD FROM : MOTOR UNIT (Spindle & Feed)
  • Page 27: Printed Circuit Board

    CDC-775 PRINTED CIRCUIT BOARD (Foil side) P. C. B. MAIN ( 5 ) PHONES L115 #301 W300 TO : MAIN (1) OPEN/ PLAY/ P. C. B. MAIN ( 6 ) CLOSE PAUSE PLAYXCHANGE STOP L109 #100 DISC TO : MAIN (1)
  • Page 28 CDC-775 PRINTED CIRCUIT BOARD (Foil side) CIRCUIT CHANGES BY MARKET. P. C. B. MAIN ( 2 ) P. C. B. CM ( 1 ) P. C. B. CM ( 2 ) U, C TABLE J189 CLAMP SENSOR UP/DOWN J187, 188...
  • Page 29: Schematic Diagram

    CDC-775 SCHEMATIC DIAGRAM Point q (Pin 59 of IC3) V : 2V/div, H : 50nsec/div TWIN BALANCED DC, 1 : 1 probe PROCESSING AMP CD HEAD AMP MUTING -5.6 -5.6 -5.6 -5.6 Point w (Pin 10 of IC301) V : 2V/div, H : 0.1µsec/div DC, 1 : 1 probe -5.6...
  • Page 30: Parts List

    CDC-775 WARNING PARTS LIST Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. ELECTRICAL PARTS Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTS List. For the parts No. of the carbon resistors, refer to last page.
  • Page 31 CDC-775 P.C.B. MAIN Schm Schm Ref. PART NO. Description Ref. PART NO. Description V3172200 P.C.B. MAIN(UC) UA653360 C.MYLAR 3600pF 50V V3172300 P.C.B. MAIN(R) VF466600 C.CE.TUBLR 10pF V3172400 P.C.B. MAIN(A) UA952120 C.MYLAR 120pF V3172500 P.C.B. MAIN(G) VJ599100 C.CE.TUBLR 0.1uF V2731000 CN.FMN VG278400 C.CE.TUBLR...
  • Page 32 CDC-775 P.C.B. MAIN P.C.B. MAIN & CM Schm Schm Schm Schm Ref. PART NO. Description Ref. PART NO. Description Ref. PART NO. Description Ref. PART NO. Description C148 VR498100 C.EL 6.8uF 6.3V D200 VD631600 DIODE 1SS133,176,HSS104 L201 VV900900 FLTR 3071-012-0 SW324 VG392900 SW.TACT...
  • Page 33 CDC-775 EXPLODED VIEW MECHANICAL PARTS Ref. PART NO. Description Remarks Markets 3- 3 MF114350 FLEXIBLE FLAT CABLE 14P 350mm 3-11 V2668000 FRONT PANEL 3-12 V2668700 SUB PANEL 3-13 V2668300 SUPPORT, HP 3-14 V2669600 WINDOW PANEL, LID 3-15 VZ494400 BUTTON 11x22...
  • Page 34 CDC-775 Ref. PART NO. Description Remarks Markets V2438700 CORD STOPPER #10P1 V2269100 DAMPER 6x45 V3393800 SPACER CDC-T14 VQ861500 CUSHION SHEET V2879500 SPACER PCB-M VU590000 BINDING TIE CBTD001B CB040540 BINDING TIE S-72B 21991500 PW HEAD S-TITE SCREW 4x8-10 FCRM3-BL VN413300 BIND HEAD BONDING B-T. SCREW...
  • Page 35 CDC-775 EXPLODED VIEW (CM-210 Unit) : Apply the grease G31KB (VQ472900)
  • Page 36 CDC-775 MECHANICAL PARTS (CM-210 Unit) Ref. PART NO. Description Remarks Markets V3172600 P.C.B. ASS'Y VP128600 FERRITE CORE FSOB160PB V3340400 CONNECTOR, FLAT CABLE 17P 110mm V3175700 CONNECTOR ASS'Y 3P 220mm V3175900 CONNECTOR ASS'Y 3P 220mm VZ760500 CHASSIS VZ760600 CAM, CL VS035400...
  • Page 37 CDC-775 EXPLODED VIEW (PU Mecha. Unit) Note : Neither the pick-up head nor the spindle motor is available independently because they are factory-adjusted for the optimum level after assembly. If the pick-up head or the spindle motor must be replaced, be sure to replace them together as a unit.
  • Page 38: Grease Application Diagram

    CDC-775 GREASE APPLICATION DIAGRAM (PU Mechanism) Apply the grease Molykote PG-663 (P/No. AAX01170) PG-663 PG-663 PG-663 PG-663...
  • Page 39: Remote Control Transmitter

    CDC-775 REMOTE CONTROL TRANSMITTER SCHEMATIC DIAGRAM IED1 KI/O6 KI/O5 KI/O7 KI/O4 2.2Ω 47µF KI/O3 S1/LED KI/O2 220Ω KI/O1 KI/O0 X OUT 3.64MHz X IN RESET CUSTOM DATA FUNCTION (HEX) (HEX) OPEN/CLOSE REPEAT RANDOM TAPE CLEAR PROG FILE EDIT FILE MODE...
  • Page 40 CDC-775 Parts List for Carbon Resistors 1/4W Type Part No. 1/6W Type Part No. 1/6W Type Part No. Value Value 1/4W Type Part No. 1.0 Ω 3100 3100 10 kΩ 7100 7100 HJ35 HF85 HF45 HF45 1.8 Ω 3180 7110 11 kΩ...
  • Page 41 CDC-775 CDC-775...

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