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Denon DVD-758 Service Manual

Dvd audio-video / super audio cd player
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MODEL
DVD-1940CI
DVD-758
DVD AUDIO-VIDEO / SUPER AUDIO CD PLAYER
For purposes of improvement, specifications and
●
design are subject to change without notice.
Please use this service manual with referring to the
●
operating instructions without fail.
Some illustrations using in this service manual are
●
slightly different from the actual set.
SERVICE MANUAL
JP
サービスをおこなう前に、このサービスマニュアルを
必ずお読みください。本機は、火災、感電、けがなど
に対する安全性を確保するために、さまざまな配慮を
おこなっており、また法的には「電気用品安全法」に
もとづき、所定の許可を得て製造されております。
従ってサービスをおこなう際は、これらの安全性が維
持されるよう、このサービスマニュアルに記載されて
いる注意事項を必ずお守りください。
TOKYO, JAPAN
Denon Brand Company, D&M Holdings lnc.
E3
E2
EK
注 意
本機の仕様は性能改良のため、予告なく変更すること
●
があります。
補修用性能部品の保有期間は、製造打切後 8 年です。
●
修理の際は、必ず取扱説明書を参照の上、作業を行っ
●
てください。
本文中に使用しているイラストは、説明の都合上現物
●
と多少異なる場合があります。
Ver. 1
E2A E1C E1K EUT
X0344V.01 DE/CDM 0706

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  • Page 1 Please use this service manual with referring to the ● 修理の際は、必ず取扱説明書を参照の上、作業を行っ ● operating instructions without fail. てください。 Some illustrations using in this service manual are ● 本文中に使用しているイラストは、説明の都合上現物 ● slightly different from the actual set. と多少異なる場合があります。 TOKYO, JAPAN Denon Brand Company, D&M Holdings lnc. X0344V.01 DE/CDM 0706...

  • Page 2: Safety Precautions

    DVD-1940CI/758 SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check.

  • Page 3: Specifications

    DVD-1940CI/758 SPECIFICATIONS Item Conditions Unit Nominal Limit 75 Ω load 1. Video Output ± 0.1 75 Ω load 2. Coaxial Digital Out mVpp ± 50 3. Audio (PCM) 3-1. Output Level 1 kHz, 0 dB Vrms 3-2. S/N 3-3. Freq. Response fs = 48 kHz, 20 Hz ~ 22 kHz ±...

  • Page 4: Safety Check After Servicing

    DVD-1940CI/758 Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and wires have been returned to their original positions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards. 1.

  • Page 5: Standard Notes For Servicing

    DVD-1940CI/758 STANDARD NOTES FOR SERVICING Circuit Board Indications Pb (Lead) Free Solder 1. The output pin of the 3 pin Regulator ICs is When soldering, be sure to use the Pb free solder. indicated as shown. How to Remove / Install Flat Pack-IC Top View Bottom View 1.
  • Page 6 DVD-1940CI/758 3. The flat pack-IC on the CBA is affixed with glue, so With Soldering Iron: be careful not to break or damage the foil of each 1. Using desoldering braid, remove the solder from pin or the solder lands under the IC when all pins of the flat pack-IC.

  • Page 7: Installation

    DVD-1940CI/758 With Iron Wire: 2. Installation 1. Using desoldering braid, remove the solder from 1. Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder the foil of each pin of the flat pack-IC on the CBA flux which is applied to all pins of the flat pack-IC, so you can install a replacement flat pack-IC more you can remove it easily.

  • Page 8: Instructions For Handling Semi- Conductors

    DVD-1940CI/758 Instructions for Handling Semi- conductors Electrostatic breakdown of the semi-conductors 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.

  • Page 9: Disassembly Flowchart

    DVD-1940CI/758 CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart This flowchart indicates the disassembly steps to gain Removal access to item(s) to be serviced. When reassembling, Remove/*Unhook/ follow the steps in reverse order. Bend, route, and Loc. Part Fig. Unlock/Release/ Note dress the cables as they were originally. Unplug/Desolder [1] Top Cover D Sub...

  • Page 10: Reference Notes

    DVD-1940CI/758 Reference Notes 1. CAUTION 1: Locking Tabs (L-1), (L-2), (L-3) and (L-4) are fragile. Be careful not to break them. [3] Tray Panel 1) Release four Locking Tabs (L-1), then release (L-4) two Locking Tabs (L-2). (L-4) 2) Release three Locking Tabs (L-3). 3) Disconnect connector CN2001, then remove the Front Unit.
  • Page 11 DVD-1940CI/758 (S-11) [11] 5.1ch Amp CBA [7] Rear Panel (S-4) (S-7) CN7101 [6] Reinforce (S-6) [12] Jack (S-12) Plate [9] Interface (S-4) (S-5) PCB Holder (S-9) (L-5) (S-4) (S-3) (S-3) (S-10) [10] D Sub Holder Fig. D4 Fig. D6 CNF02 CNS01 (S-13) [8] DVD Main CBA Unit...

  • Page 12: How To Eject Manually

    DVD-1940CI/758 (S-14) (S-16) (S-16) (S-14) [16] Loader Base [15] AV CBA [17] Power [18] Main PCB Holder [14] LED CBA (S-15) (S-17) Holder CN2102 (S-18) (S-14) Fig. D8 Fig. D9 3. How to Eject Manually 1. Remove the Top Cover. 2.

  • Page 13: How To Initialize The Dvd Player

    DVD-1940CI/758 HOW TO INITIALIZE THE DVD PLAYER To put the program back at the factory-default, initialize the DVD player using the following procedure. 1. Press [1], [2], [3], [4], and [DISPLAY] buttons on the remote control unit in that order. Fig.

  • Page 14: Firmware Renewal Mode

    DVD-1940CI/758 FIRMWARE RENEWAL MODE 1. Turn the power on and remove the disc on the tray. The appearance shown in (*1) of Fig. c is described as follows: 2. To put the DVD player into version up mode, press [9], [8], [7], [6], and [SEARCH MODE] buttons on Appearance State the remote control unit in that order.
  • Page 15 DVD-1940CI/758 10. Press [CLEAR] button on the remote control unit. Fig. h appears on the screen. " ******* " differ depending on the models. MODEL : ******* Version : *.** Region LD OPERATING TIME TIME(DVD) : *:** TIME(CD) : *:** EEPROM CLEAR : OK EEPROM CLEAR : CLEAR EXIT: POWER...

  • Page 16: Tray Lock Mode

    DVD-1940CI/758 TRAY LOCK MODE Tray Lock Mode prevents the tray opening or closing to prevent disc theft in demo mode. Enter this mode using the following procedure. 1. Confirm that the TV Monitor is connected. 2. With playback stopped, press [SETUP], [TOP MENU], [3], [AUDIO], [0] and [SETUP] buttons on the remote control unit in that order.

  • Page 17: Remote Lock Mode

    DVD-1940CI/758 REMOTE LOCK MODE SETTING MENU: Remote Lock Off Mode: This mode receives an input signal from the remote control unit or from the Remote In-Jack on the rear panel. Remote Lock On Mode: This mode dose not receive an input signal from the remote control unit or from the Remote In-Jack on the rear panel.

  • Page 18: Troubleshooting

    DVD-1940CI/758 TROUBLESHOOTING FLOW CHART NO.1 The power cannot be turned on. See FLOW CHART No.2 <The fuse blows out.> Is the fuse normal? Is normal state restored when once unplugged Check if there is any leak or short-circuiting on the power cord is plugged again after several seconds? primary circuit component, and service it if defective.
  • Page 19 DVD-1940CI/758 FLOW CHART NO.6 P-ON+10V (EV+10V) is not outputted. Is 11V voltage supplied to the emitter of Q1002? Check D1030, D1048, C1035, C1048, L1009 and the periphery circuit, and service it if defective. Check Q1016 and PWRCON line and service it if Is the voltage of base on Q1002 lower than the defective.
  • Page 20 DVD-1940CI/758 FLOW CHART NO.12 The fluorescent display tube does not light up. Is 3.3V voltage supplied to Pins(6,24) of IC2001? Check the EV+3.3V line and service it if defective. Is the voltage of approximately -20V supplied to Check the -FL (-20V) line and service it if defective. Pin(15) of IC2001? Is there 500kHz oscillation at Pin(26) of IC2001? Check R2002, IC2001 and their periphery, and...
  • Page 21 DVD-1940CI/758 FLOW CHART NO.15 The disc tray cannot be opened and closed. (It can be done using the remote control unit.) Is the normal control voltage inputted to Pin(31) of Replace the "OPEN/CLOSE" switch (SW2108). IC2101? Refer to "FLOW CHART NO.13" <The key operation is not functioning.>...
  • Page 22 DVD-1940CI/758 FLOW CHART NO.20 Both functions of picture and sound do not operate normally. Replace the DVD Main CBA Unit. No improvement can be found. Original DVD Main CBA Unit is poor. Replace the DVD Mechanism. FLOW CHART NO.21 Picture does not appear normally. Set the disc on the disc tray, and playback.
  • Page 23 DVD-1940CI/758 FLOW CHART NO.22 Audio is not outputted normally. Set the disc on the disc tray, and playback. Replace the DVD Main CBA Unit or DVD Mechanism. Are the analog audio signals outputted to each pin of CN1601 on AV CBA? CN1601 12PIN AUDIO(L) CN1601 14PIN AUDIO(R) Check each line between each pin of CN1601...
  • Page 24 DVD-1940CI/758 FLOW CHART NO.23 Audio is not outputted. (JK7101) Set the disc (with 5.1ch Audio) on the disc tray, and playback. Are the analog audio signals outputted to each pin of CN7102 on 5.1ch Amp CBA. Replace the DVD Main CBA or DVD Mechanism. CN7102 15PIN FRONT(L) CN7102 13PIN FRONT(R) CN7102 11PIN SURROUND(L)

  • Page 25: Block Diagrams

    DVD-1940CI/758 BLOCK DIAGRAMS System Control / Servo Block Diagram...

  • Page 26: Digital Signal Process Block Diagram

    DVD-1940CI/758 Digital Signal Process Block Diagram...

  • Page 27: Video Block Diagram

    DVD-1940CI/758 Video Block Diagram...

  • Page 28: Audio Block Diagram

    DVD-1940CI/758 Audio Block Diagram...
  • Page 29 DVD-1940CI/758 SACD Block Diagram...

  • Page 30: Power Supply Block Diagram

    DVD-1940CI/758 Power Supply Block Diagram...

  • Page 31: Schematic Diagrams / Cba's And Test Points

    DVD-1940CI/758 SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS Standard Notes WARNING Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.
  • Page 32 DVD-1940CI/758 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE. ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQES D'INCELE N'UTILISER QUE DES FUSIBLE DE MÊME TYPE.
  • Page 33 DVD-1940CI/758 DVD Main 1/7 Schematic Diagram 1 NOTE: Either IC461 or IC462 is used for DVD MAIN CBA UNIT.
  • Page 34 DVD-1940CI/758 DVD Main 2/7 Schematic Diagram...
  • Page 35 DVD-1940CI/758 IC101 Voltage Chart ~ : Voltage is not consistent ----- : Not used Unit : Volts PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP ----- -----...
  • Page 36 DVD-1940CI/758 DVD Main 3/7 Schematic Diagram...
  • Page 37 DVD-1940CI/758 DVD Main 4/7 Schematic Diagram...
  • Page 38 DVD-1940CI/758 DVD Main 5/7 Schematic Diagram...
  • Page 39 DVD-1940CI/758 DVD Main 6/7 Schematic Diagram...
  • Page 40 DVD-1940CI/758 DVD Main 7/7 Schematic Diagram...
  • Page 41 DVD-1940CI/758 AV 1/3 Schematic Diagram CAUTION ! For continued protection against fire hazard, replace only with the same type fuse. CAUTION ! ATTENTION : Pour une protection continue les risqes Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. NOTE: d'Incele n'utiliser que des fusible de même type.
  • Page 42 DVD-1940CI/758 AV 2/3 Schematic Diagram...
  • Page 43 DVD-1940CI/758 AV 3/3, Function & LED Schematic Diagram FL2001 MATRIX CHART TL./GR. TR. /CP. PSCAN DVD A SACD TL./GR. RPT. PSCAN TR./CP. SACD...
  • Page 44 DVD-1940CI/758 5.1ch Amp Schematic Diagram...
  • Page 45 DVD-1940CI/758 Interface Schematic Diagram...
  • Page 46 DVD-1940CI/758 WAVEFORMS Pin 8 of CN1601 Pin 14 of CN1601 AUDIO(R) 0.5V 0.5ms VIDEO-Y 0.2V 20µs Pin 10 of CN1601 Pin 16 of CN1601 VIDEO-C 0.2V 20µs SPDIF 0.1µs C1402 PLUS LEAD NOTE: Measuring Disc DVD: DVDT-S01 CD : TCD-784 VIDEO-CVBS 0.5V 20µs...

  • Page 47: Wiring Diagram

    DVD-1940CI/758 WIRING DIAGRAM P-ON+5V 20 CD/DVD 19 VIDEO-Y(I) D 18 ASPECT A 17 VIDEO-Pr/Cr C 16 B 15 VIDEO-Pb/Cb 6 NU 14 VREF 13 VIDEO-Y(I/P) NU 12 GND 11 VIDEO-C CD-LD 10 AUDIO-GND GND(LD) 9 AUDIO(L) DVD-LD 8 AUDIO(L)-MUTE 13 PD-MONI 7 AUDIO(R) GND(DVD-PD) 6...

  • Page 48: Lead Identifications

    DVD-1940CI/758 LEAD IDENTIFICATIONS TNY277 KTA1267-Y-AT/P 2SA1015-Y(TE2 F T) KTC3199-(GR,Y)-AT/P 2SA966-Y(TE6 F M) KRA110M-AT/P KTA1266-Y-AT/P 2SA1980M Y 2SC5343M Y KTA1273-Y-AT/P 2SC5343MG-AT KRC103M-AT/P 2SC5344 Y KRA105M-AT/P 2SC2120-Y(TE2 F T) KTC3203-Y-AT/P 2SC1815-(GR,Y)(TE2 F T) E C B E C B KIA4558P/P UTC4558 MM1636XWRE CXA1511M-T4 NJM4580M-TE1 PT6313-S-TP(L)

  • Page 49: Exploded Views

    DVD-1940CI/758 EXPLODED VIEWS Cabinet 2L109 JK7101 2L011 5.1ch Amp CBA 2L011 2L011 Interface CBA 2L108 2L011 2L113 JK2321 2L021 2L105 2L021 2L106 2L011 CN3002 JK3501 2L105 2L021 JK1401 JK1404 JK1202 DVD Main CBA Unit IC1204 2L107 2L114 F1001 2B34 2L101 2L114 2L102 2B39...
  • Page 50 DVD-1940CI/758 PARTS LIST OF EXPLODED VIEW ＊本表に記載されている部品は、補修用部品のため製品に使用している部品とは一部、形状、寸法などが異なる場合があります。 ＊ The parts listed below are for maintenance only, might differ from the parts used in the unit in appearances or dimensions. ＊ "nsp" 印の部品は常時在庫していませんので供給に長時間を要することがあります。場合によっては、供給をお断りする場合があります。 ＊ Part indicated with the mark “nsp” are not always in stock and possibly to take a long period of time for supplying, or in some case supplying of part may be refused. Ref.
  • Page 51 DVD-1940CI/758 Ref. No. Part No. Part Name Remark Q'ty 2L106 SCREW C-TIGHT M3X6 0VM412937A 2L107 SCREW P-TIGHT M3X8 BIND HEAD+ GBJP3080 2L108 SCREW C-TIGHT M3X6 0VM412937A 2L109 SCREW P-TIGHT M3X8 BIND HEAD+ GBJP3080 2L112 SCREW C-TIGHT M3X6 0VM412937A 2L113 SCREW P-TIGHT M3X8 BIND HEAD+ GBJP3080 2L114 SCREW TAP TIGHT WASHER+ P-TIGHT...
  • Page 52 DVD-1940CI/758 Packing Unit...
  • Page 53 DVD-1940CI/758 PARTS LIST OF PACKING & ACCESSORIES ＊本表に記載されている部品は、補修用部品のため製品に使用している部品とは一部、形状、寸法などが異なる場合があります。 ＊ The parts listed below are for maintenance only, might differ from the parts used in the unit in appearances or dimensions. ＊ "nsp" 印の部品は常時在庫していませんので供給に長時間を要することがあります。場合によっては、供給をお断りする場合があります。 ＊ Part indicated with the mark “nsp” are not always in stock and possibly to take a long period of time for supplying, or in some case supplying of part may be refused. Ref.

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