Denon DCD-720AE DCD-520AE CD PLAYER Service Manual

D&M Holdings Inc. SERVICE MANUAL e e Copyright 2012 D&M Holdings Inc. All rights reserved. WARNING: Violators will be prosecuted to the maximum extent possible. MODEL JP E3 E2 E1 E1C EA E2R EUT DCD-720AE P P DCD-520AE P P CD PLAYER Ver. 1 S0444-1V01DM/DG1205 • Some illustrations using in this service manual are slightly different from the actual set. • Please use this service manual with referring to the operating instructions without fail. • For purposes of improvement, speciﬁcations and design are subject to change without notice.

2 CONTENTS ABOUT THIS MANUAL .............................................................3 What you can do with this manual ............................................3 Using Adobe Reader (Windows version) ..................................4 SAFETY PRECAUTIONS ..........................................................6 NOTE FOR SCHEMATIC DIAGRAM.........................................7 NOTE FOR PARTS LIST ...........................................................7 TECHNICAL SPECIFICATIONS ..............................................10 DIMENSION .............................................................................10 CAUTION IN SERVICING........................................................ 11 Initializing CD Player ............................................................... 11 Service Jig .............................................................................. 11 Note Handling and Replacement of the Laser pick-up .......12 1. Protection of the LD.............................................................12 2. Precautions when handling the laser CD mechanism .........12 3. Cautions on assembling and adjustment ............................12 4. Determining whether the laser pick-up is defective .............12 DISASSEMBLY ........................................................................13 1. MAIN ASSY .........................................................................15 2. FRONT PANEL ASSY .........................................................16 3. CD MECHANISM ASSY......................................................17 4. AUDIO/POWER ASSY ........................................................18 SPECIAL MODE ......................................................................19 Special mode setting button ....................................................19 1. Version display mode ..........................................................20 2. VFD check mode .................................................................20 3. Cold start mode ...................................................................20 4. CD test mode ......................................................................21 5. CD heart run mode ..............................................................24 6. Laser on time.......................................................................26 7. Main μ-com version up mode ..............................................26 8. Timer check mode ...............................................................26 WHEN THE MICROPROCESSOR IS REPLACED WITH A NEW ONE...................................................................27 PROCEDURE FOR UPGRADING THE VERSION OF THE FIRMWARE................................................................27 1. Update for IC11(TMPM330FWFG) ......................................28 2. Update for IC41(TMP92FD28AFG):USB μcom...................32 TROUBLE SHOOTING ............................................................40 FLOW CHART NO.1 ...........................................................40 FLOW CHART NO.2 ...........................................................40 FLOW CHART NO.3 ...........................................................41 FLOW CHART NO.4 ...........................................................41 FLOW CHART NO.5 ...........................................................41 FLOW CHART NO.6 ...........................................................42 FLOW CHART NO.7 ...........................................................42 FLOW CHART NO.8 ...........................................................42 FLOW CHART NO.9 ...........................................................43 MEASURING METHOD AND WAVEFORMS .........................44 WAVEFORMS .........................................................................46 BLOCK DIAGRAM...................................................................49 WIRING DIAGRAM ..................................................................50 LEVEL DIAGRAM....................................................................51 PRINTED WIRING BOARDS...................................................52 SCHEMATIC DIAGRAMS .......................................................57 POWER AUDIO ......................................................................57 FRONT USB............................................................................58 CD MCU ..................................................................................59 EXPLODED VIEW DCD720AE................................................60 EXPLODED VIEW DCD520AE................................................61 EXPLODED VIEW OF CD MECHANISM UNIT.......................62 PARTS LIST OF EXPLODED VIEW DCD720AE ....................63 PARTS LIST OF EXPLODED VIEW DCD520AE ....................65 PARTS LIST OF CD MECHANISM UNIT DCD720AE&DCD520AE .........................................................67 PACKING VIEW .......................................................................68 PARTS LIST OF PACKING & ACCESSORIES DCD720AE ...68 PARTS LIST OF PACKING & ACCESSORIES DCD520AE ...69 SEMICONDUCTORS ...............................................................70 1. IC's ......................................................................................70 2. FL DISPLAY.........................................................................88 PARTS LIST OF PCB UNIT DCD720AE .................................89 AUDIO_POWER ASS'Y ..........................................................89 CD PCB ASS'Y DCD720AE ....................................................94 PARTS LIST OF PCB UNIT DCD520AE .................................98 AUDIO_POWER ASS'Y ..........................................................98 CD PCB ASS'Y DCD520AE ..................................................102

3 ABOUT THIS MANUAL Read the following information before using the service manual. What you can do with this manual Search for a Ref. No. (phrase) (Ctrl+Shift+F) You can use the search function in Acrobat Reader to search for a Ref. No. in schematic diagrams, printed wiring board diagrams, block diagrams, and parts lists. 1.Press Ctrl+Shift+F on the keyboard. • The Search window appears. Ctrl Shift F 2.Enter the Ref. No. you want to search for in the Search window, and then click the Search button. • A list of search results appears. 3.Click an item on the list. • The screen jumps to the page for that item, and the search phrase is displayed.

4 Using Adobe Reader (Windows version) • Properties Click this button and check that the printer is set to a suitable paper size. • Page to print Select the following checkbox. "More Options" : "Current View" • Page Sizing & Handling Select the following checkbox. "Size" / "Size Options" : "Fit" Add notes to this data (Sign) The Sign function lets you add notes to the data in this manual. Save the file once you have finished adding notes. [Example using Adobe Reader X] On the "View" menu, click "Sign". • The Sign pane appears. [Example using Adobe Reader 9] On the "Document" menu, click "Sign". Magnify schematic / printed wiring board diagrams - 1 (Ctrl+Space, mouse operation) Press Ctrl +Space on the keyboard and drag the mouse to select the area you want to view. • The selected area is magnified. Ctrl Space 0 • When you want to move the area shown, hold down Space and drag the mouse. • When you want to show a full page view, press Ctrl+0 on the keyboard. Print a magnified part of the manual The Properties dialog box and functions will vary depending on your printer. 1. Drag the mouse to magnify the part you want to print. 2. On the "File" menu, click "Print". 3. Configure the following settings in the Print dialog box. 4. Click the Print button to start printing.

5 Magnify schematic / printed wiring board diagrams - 2 (Pan & Zoom function) The Pan & Zoom function lets you see which part of a magniﬁed diagram is being shown in a separate window. [Example using Adobe Reader X] On the "View" menu, point to "Zoom", and then click "Pan & Zoom". • The Pan & Zoom window appears on the screen. [Example using Adobe Reader 9] On the "Tools" menu, point to "Select & Zoom", and then click "Pan & Zoom Window". Magnify schematic / printed wiring board diagrams - 3 (Loupe Tool function) The Loupe Tool function lets you magnify a specific part of a diagram in a separate window. [Example using Adobe Reader X] On the "View" menu, point to "Zoom", and then click "Loupe Tool". • The Loupe Tool window appears on the screen. [Example using Adobe Reader 9] On the "Tools" menu, point to "Select & Zoom", and then click "Loupe Tool Window".

6 SAFETY PRECAUTIONS The following items should be checked for continued protection of the customer and the service technician. LEAKAGE CURRENT CHECK Before returning the set to the customer, be sure to carry out either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the set is defective. Be sure to test for leakage current with the AC plug in both polarities, in addition, when the set's power is in each state (on, off and standby mode), if applicable. CAUTION Please heed the following cautions and instructions during servicing and inspection. ◎ Heed the cautions! Cautions which are delicate in particular for servicing are labeled on the cabinets, the parts and the chassis, etc. Be sure to heed these cautions and the cautions described in the handling instructions. ◎ Cautions concerning electric shock! (1) An AC voltage is impressed on this set, so if you touch internal metal parts when the set is energized, you may get an electric shock. Avoid getting an electric shock, by using an isolating transformer and wearing gloves when servicing while the set is energized, or by unplugging the power cord when replacing parts, for example. (2) There are high voltage parts inside. Handle with extra care when the set is energized. ◎ Caution concerning disassembly and assembly! Through great care is taken when parts were manufactured from sheet metal, there may be burrs on the edges of parts. The burrs could cause injury if fingers are moved across them in some rare cases. Wear gloves to protect your hands. ◎ Use only designated parts! The set's parts have specific safety properties (fire resistance, voltage resistance, etc.). Be sure to use parts which have the same properties for replacement. The burrs have the same properties. In particular, for the important safety parts that are indicated by the z mark on schematic diagrams and parts lists, be sure to use the designated parts. ◎ Be sure to mount parts and arrange the wires as they were originally placed! For safety seasons, some parts use tapes, tubes or other insulating materials, and some parts are mounted away from the surface of printed circuit boards. Care is also taken with the positions of the wires by arranging them and using clamps to keep them away from heating and high voltage parts, so be sure to set everything back as it was originally placed. ◎ Make a safety check after servicing! Check that all screws, parts and wires removed or disconnected when servicing have been put back in their original positions, check that no serviced parts have deteriorate the area around. Then make an insulation check on the external metal connectors and between the blades of the power plug, and otherwise check that safety is ensured. (Insulation check procedure) Unplug the power cord from the power outlet, disconnect the antenna, plugs, etc., and on the power. Using a 500V insulation resistance tester, check that the insulation resistance value between the inplug and the externally exposed metal parts (antenna terminal, headphones terminal, input terminal, etc.) is 1MΩ or greater. If it is less, the set must be inspected and repaired. Many of the electric and the structural parts used in the set have special safety properties. In most cases these properties are difficult to distinguish by sight, and the use of replacement parts with higher ratings (rated power and withstand voltage) does not necessarily guarantee that safety performance will be preserved. Parts with safety properties are indicated as shown below on the wiring diagrams and the parts list in this service manual. Be sure to replace them with the parts which have the designated part number. (1) Schematic diagrams.......Indicated by the z mark. (2) Parts lists.......Indicated by the z mark. The use of parts other than the designated parts could cause electric shocks, fires or other dangerous situations. CAUTION Concerning important safety parts

7 NOTE FOR SCHEMATIC DIAGRAM WARNING: Parts indicated by the z mark have critical characteristics. Use ONLY replacement parts recommended by the manufacturer. CAUTION: Before returning the set to the customer, be sure to carry out either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the set is defective. WARNING: DO NOT return the set to the customer unless the problem is identiﬁed and remedied. NOTICE: ALL RESISTANCE VALUES IN OHM. k=1,000 OHM / M=1,000,000 OHM ALL CAPACITANCE VALUES ARE EXPRESSED IN MICRO FARAD, UNLESS OTHERWISE INDICATED. P INDICATES MICRO-MICRO FARAD. EACH VOLTAGE AND CURRENT ARE MEASURED AT NO SIGNAL INPUT CONDITION. CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. Parts indicated by "nsp" on this table cannot be supplied. When ordering a part, make a clear distinction between "1" and "I" (i) to avoid mis-supplying. A part ordered without specifying its part number can not be supplied. General-purpose Carbon Chip Resistors are not included are not included in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.) Parts indicated by the z mark have critical characteristics. Use ONLY replacement parts recommended by the manufacturer. General-purpose Carbon Film Resistor in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.) Part indicated by "★" mark is not illustrated in the exploded view. WARNING: 1. 2. 3. 4. 5. 6. NOTE FOR PARTS LIST

8 WARNING AND LASER SAFETY INSTRUCTIONS F ATTENTION D WARNUNG WAARSCHUWING AVVERTIMENTO WARNING Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used. Veiligheidsbepalingen vereisen, dat het apparaat in zijn oorspronkelijke toestand wordt terug gebracht en dat onderdelen, identiek aan de gespecifieerde worden toegepast. Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu beachten. Der Originalzustand des Gerats darf nicht verandert werden. Fur Reparaturen sind Original-Ersatzteile zu verwenden. Le norme di sicurezza esigono che l’apparecchio venga rimesso nelle condizioni originali e che siano utilizzati pezzi di ricambiago idetici a quelli specificati. Les normes de sécurité exigent que l’appareil soit remis a l’état d’origine et que soient utilisées les pièces de rechange identiques à celles spécifiées. “Pour votre sécurité, ces documents doivent être utilisés par des spécialistes agrées, seuls habilités à réparer votre appareil en panne.” GB NL I D I F GB NL All ICs and many other semi-conductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set via a wrist wrap with resistance. Keep components and tools also at this potential. Tous les IC et beaucoup d’autres semiconducteurs sont sensibles aux décharges statiques (ESD). Leur longévité pourrait être considérablement écourtée par le fait qu’aucune précaution n’est prise a leur manipulation. Lors de réparations, s’assurer de bien être relié au même potentiel que la masse de l’appareil et enfiler le bracelet serti d’une résistance de sécurité. Veiller a ce que les composants ainsi que les outils que l’on utilise soient également a ce potentiel. Alle IC und viele andere Halbleiter sind empfindlich gegen elektrostatische Entladungen (ESD). Unsorgfältige Behandlung bei der Reparatur kann die Lebensdauer drastisch vermindern. Sorgen sie dafür, das Sie im Reparaturfall dem Massepotential des Gerätes verbunden sind. Halten Sie Bauteile und Hilfsmittel ebenfalls über ein Pulsarmband mit Widerstand mit auf diesem Potential. Alle IC’s en vele andere halfgeleiders zijn gevoelig voor elektrostatische ontladingen (ESD). Onzorgvuldig behandelen tijdens reparatie kan de levensduur drastisch doen verminderen. Zorg ervoor dat u tijdens reparatie via een polsband met weerstand verbonden bent met apparaat. Houd componenten en hulpmiddelen ook op ditzelfde potentiaal. Tutti IC e parecchi semi-conduttori sono sensibili alle scariche statiche (ESD). La loro longevita potrebbe essere fortemente ridatta in caso di non osservazione della piu grande cauzione alla loro manipolazione. Durante le riparazioni occorre quindi essere collegato allo stesso potenziale che quello della massa dell’apparecchio tramite un braccialetto a resistenza. Assicurarsi che i componenti e anche gli utensili con quali si lavora siano anche a questo potenziale. LASER SAFETY CAUTION VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM ADVARSEL SYNLIG OG USYNLIG LASERSTRÅLING VED ÅBNING UNDGÅ UDSÆTTELSE FOR STRÅLING ADVARSEL SYNLIG OG USYNLIG LASERSTRÅLING NÅR DEKSEL Å PNES UNNGÅ EKSPONERING FOR STRÅLEN VARNING SYNLIG OCH OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD BETRAKTA EJ STRÅLEN VARO! AVATT AESSA OLET ALTTIINA NÄKYVÄLLE JA NÄKYMÄTTÖMÄLLE LASER SÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN VORSICHT SICHTBARE UND UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEÖFFNET NICHT DEM STRAHL AUSSETSEN DANGER VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID DIRECT EXPOSURE TO BEAM ATTENTION RAYONNEMENT LASER VISIBLE ET INVISIBLE EN CAS D'OUVERTURE EXPOSITION DANGEREUSE AU FAISCEAU USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURE OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. AVOID DIRECT EXPOSURE TO BEAM WARNING The use of optical instruments with this product will increase eye hazard. Repair handling should take place as much as possible with a disc loaded inside the player WARNING LOCATION: INSIDE ON LASER COVERSHIELD This unit employs a laser. Only a qualified service person should remove the cover or attempt to service this device, due to possible eye injury. 100301DM

9 INSTRUCTIONS FOR HANDLING SEMI-CONDUCTORS AND OPTICAL UNIT Electrostatic breakdown of the semi-conductors or optical pickup may occur due to a potential difference caused by electrostatic charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1 MΩ) that is properly grounded to remove any static electricity that may be charged on the body. 2. Ground for Workbench Be sure to place a conductive sheet or copper plate with proper grounding (1 MΩ) on the workbench or other surface, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing <Incorrect> CBA Grounding Band Conductive Sheet or Copper Plate 1MΩ 1MΩ <Correct> CBA

10 TECHNICAL SPECIFICATIONS [DCD-720AE] [DCD-520AE] n Audio performance • Analog output Channels: 2 channels 2 channels Playable frequency range: 2 Hz – 20 kHz 2 Hz – 20 kHz Playable frequency response: 2 Hz – 20 kHz 2 Hz – 20 kHz S/N: 112 dB 110 dB Dynamic range: 100 dB 100 dB Harmonic distortion: 0.0025 % (1 kHz) 0.003 % (1 kHz) Wow & ﬂutter: Below measurable limits Below measurable limits Output level: 2.0 V (10 kΩ) 2.0 V (10 kΩ) Signal type: 16-bit linear PCM 16-bit linear PCM Sampling frequency: 44.1 kHz 44.1 kHz Usable discs: Compact Disc Compact Disc • Digital output Optical: –15 – –21 dBm –15 – –21 dBm Emission wavelength: 660 nm 660 nm n General Power supply: AC 230 V, 50/60 Hz AC 230 V, 50/60 Hz Power consumption: 22 W 13 W Power consumption in standby mode: 0.3 W 0.3 W Weight : 4.1kg (DCD-720AE) 4.0kg (DCD-520AE) DIMENSION 265.0 273.0 166.0 50.0 49.0 19.0 88.0 107.0 434.0 344.0 60.0 45.0 45.0 2.0 6.0

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Denon DCD-720AE DCD-520AE CD PLAYER Service Manual

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