Denon DVD-756 Service Manual
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Denon DVD-756 Service Manual

Denon DVD-756 Service Manual

Dvd audio/video/ super audio cd player
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3 7 63 1515 0
MODEL
DVD AUDIO-VIDEO / SUPER AUDIO CD PLAYER
TE
L 13942296513
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.
www
.
http://www.xiaoyu163.com
SERVICE MANUAL
DVD-1920/756
x
ao
u163
y
i
Denon Brand Company, D&M Holdings Inc.
http://www.xiaoyu163.com
2 9
8
Q Q
3
6 7
1 3
1 5
co
.
TOKYO, JAPAN
9 4
2 8
For U.S.A. & Canada model
Ver. 2
0 5
8
2 9
9 4
2 8
m
X0247 V.02 DE/CDM 0508
9 9
9 9

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Summary of Contents for Denon DVD-756

  • Page 1 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. u163 TOKYO, JAPAN Denon Brand Company, D&M Holdings Inc. X0247 V.02 DE/CDM 0508 http://www.xiaoyu163.com...

  • Page 2: Table Of Contents

    http://www.xiaoyu163.com DVD-1920/756 TABLE OF CONTENTS 3 7 63 1515 0 SPECIFICATIONS ............... . . 3 LASER BEAM SAFETY PRECAUTIONS .

  • Page 3: Specifications

    http://www.xiaoyu163.com DVD-1920/756 SPECIFICATIONS 3 7 63 1515 0 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) 1 kHz, 0 dB, 47k Ω load 3-1.

  • Page 4: Laser Beam Safety Precautions

    http://www.xiaoyu163.com DVD-1920/756 LASER BEAM SAFETY PRECAUTIONS 3 7 63 1515 0 This DVD player uses a pickup that emits a laser beam. Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.

  • Page 5: Important Safety Precautions

    http://www.xiaoyu163.com DVD-1920/756 IMPORTANT SAFETY PRECAUTIONS 3 7 63 1515 0 Product Safety Notice Also check areas surrounding repaired locations. J. Be careful that foreign objects (screws, solder Some electrical and mechanical parts have special droplets, etc.) do not remain inside the set. safety-related characteristics which are often not K.

  • Page 6: Te L 13942296513

    http://www.xiaoyu163.com DVD-1920/756 Safety Check after Servicing 3 7 63 1515 0 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.

  • Page 7: Standard Notes For Servicing

    http://www.xiaoyu163.com DVD-1920/756 STANDARD NOTES FOR SERVICING 3 7 63 1515 0 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...
  • Page 8 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 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 9 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 2. Installation With Iron Wire: 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 10 http://www.xiaoyu163.com DVD-1920/756 Instructions for Handling Semi- 3 7 63 1515 0 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 11: Cabinet Disassembly Instructions

    http://www.xiaoyu163.com DVD-1920/756 CABINET DISASSEMBLY INSTRUCTIONS 3 7 63 1515 0 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.
  • Page 12 http://www.xiaoyu163.com DVD-1920/756 Reference Notes 3 7 63 1515 0 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 two Locking Tabs (L-1), then release (L-4) two Locking Tabs (L-2). (L-4) 2) Release three Locking Tabs (L-3).
  • Page 13 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 (S-8) (S-8) [6] Rear Panel (S-3) (S-5) (S-3) (S-4) (S-3) [10] DVD Mechanism Fig. D4 Fig. D6 (S-9) (S-6) (S-9) [7] DVD Main CBA Unit [8] 5.1ch (S-10) Amp CBA [11] LED CBA CN7101 (S-7) (S-6A)
  • Page 14 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 (S-11) (S-11) [13] Loader Base [14] Power [15] Main PCB Holder (S-12) Holder (S-13) Fig. D8 3. How to Eject Manually 1. Remove the Top Cover. 2. Rotate the roulette in the direction of the arrow as shown below. View for A L 13942296513 Rotate this roulette in...

  • Page 15: How To Initialize The Dvd Player

    http://www.xiaoyu163.com DVD-1920/756 HOW TO INITIALIZE THE DVD PLAYER 3 7 63 1515 0 To put the program back at the factory-default, initialize the DVD player as the following procedure. 1. Press [1], [2], [3], [4], and [DISPLAY] buttons on the remote control unit in that order. Fig.

  • Page 16: Firmware Renewal Mode

    http://www.xiaoyu163.com DVD-1920/756 FIRMWARE RENEWAL MODE 3 7 63 1515 0 1. Turn the power on and remove the disc on the 5. After programming is finished, the tray opens tray. automatically. Fig. e appears on the screen and the checksum in (*2) of Fig. e appears on the VFD 2.
  • Page 17 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 10. Press [CLEAR] button on the remote control unit. Fig. h appears on the screen. " ******* " differ depending on the models. MODEL : ******* Version : *.** Region : * EEPROM CLEAR : OK EEPROM CLEAR : CLEAR EXIT: POWER Fig.

  • Page 18: Troubleshooting

    http://www.xiaoyu163.com DVD-1920/756 TROUBLESHOOTING 3 7 63 1515 0 FLOW CHART NO.1 The power cannot be turned on. Is the fuse normal? See FLOW CHART No.2 <The fuse blows out.> 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 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 FLOW CHART NO.6 P-ON+10V (EV+10V) is not outputted. Is 10V 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 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 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.
  • Page 21 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 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(4) of Replace the "OPEN/CLOSE" button (SW2108). IC2001? Refer to "FLOW CHART NO.13"...
  • Page 22 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 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.
  • Page 23 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 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 13PIN AUDIO(L) CN1601 15PIN AUDIO(R)
  • Page 24 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 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.

  • Page 25: Block Diagrams

    http://www.xiaoyu163.com DVD-1920/756 BLOCK DIAGRAMS 3 7 63 1515 0 System Control / Servo Block Diagram L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 26 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 Digital Signal Process Block Diagram L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 27 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 Video Block Diagram L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 28 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 Audio Block Diagram L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 29 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 SACD Block Diagram L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 30 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 Power Supply Block Diagram L 13942296513 u163 http://www.xiaoyu163.com...

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

    http://www.xiaoyu163.com DVD-1920/756 SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS 3 7 63 1515 0 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 http://www.xiaoyu163.com DVD-1920/756 3 7 63 1515 0 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 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 DVD Main 1/7 Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 34 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 DVD Main 2/7 Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 35 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 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...
  • Page 36 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 DVD Main 3/7 Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 37 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 DVD Main 4/7 Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 38 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 DVD Main 5/7 Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 39 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 DVD Main 6/7 Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 40 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 DVD Main 7/7 Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 41 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 AV 1/3 Schematic Diagram CAUTION ! For continued protection against fire hazard, CAUTION ! replace only with the same type fuse. Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. NOTE: ATTENTION : Pour une protection continue les risqes If Main Fuse (F1001) is blown , check to see that all components in the power supply...
  • Page 42 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 AV 2/3 Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 43 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 AV 3/3, Function & LED Schematic Diagram FL2001 MATRIX CHART SACD PSCAN REPEAT GROUP TITLE SACD REPEAT TITLE GROUP PSCAN HD VCD 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 44 http://www.xiaoyu163.com DVD-1920/756 3 7 6 3 1 5 1 5 0 5.1ch Amp Schematic Diagram 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 E SCA http://www.xiaoyu163.com...

  • Page 45: Waveforms

    http://www.xiaoyu163.com DVD-1920/756 WAVEFORMS 3 7 63 1515 0 Pin 8 of CN1601 Pin 15 of CN1601 AUDIO(R) 0.5ms VIDEO-Y 0.1V 0.1V 20µs Pin 10 of CN1601 Pin 18 of CN1601 VIDEO-C VIDEO-C 0.1V 20µs SPDIF 0.1µs L 13942296513 C1402 PLUS LEAD NOTE: Input CD: 1kHz PLAY...

  • Page 46: Wiring Diagram

    http://www.xiaoyu163.com DVD-1920/756 WIRING DIAGRAM 3 7 63 1515 0 1 SCLOCK 2 GND 3 EXTRG0 4 EV+3.3V(D) 5 SDATA 6 RESET 7 NU 8 GND 9TRCDATA1 9 NU 10 NU P-ON+5V 20 11 NU CD/DVD 19 12 NU D 18 13 NU A 17 C 16...

  • Page 47: Lead Identifications

    http://www.xiaoyu163.com DVD-1920/756 LEAD IDENTIFICATIONS 3 7 63 1515 0 2SA1015-Y(TE2 F T) 2SA1015-Y(TPE2) 2SC1815-GR(TE2 F T) 2SC2120-Y(TE2 F T) 2SC1815-GR(TPE2) 2SC2120-Y(TPE2) KTA1267(Y) 2SC2236-Y-TPE6 C KTA1267Y-AT/P KTA1266(Y) KTC3199(GR) KTA1266-Y-AT/P KTC3199-GR-AT/P KTC3203(Y) KTC3198-Y-AT/P KTC3203-Y-AT/P BN1L3Z(P) KTC3205(Y) KRA105M-AT/P KTC3205-Y-AT/P KRA110M-AT/P 2SA966-Y(TE6 F M) KTA1273(Y) 2SA966(Y) KTC3198(Y)

  • Page 48: Exploded Views

    http://www.xiaoyu163.com DVD-1920/756 EXPLODED VIEWS 3 7 63 1515 0 Cabinet See Electrical Parts List for parts with this mark. 2L109 Some Ref. Numbers are not in sequence. 5.1ch Amp CBA 2L011 2L011 2L108 2L011 2L011 DVD Main CBA Unit 2L105 2L021 2L021 2L021...
  • Page 49 http://www.xiaoyu163.com DVD-1920/756 Packing 3 7 63 1515 0 L 13942296513 Unit u163 http://www.xiaoyu163.com...

  • Page 50: Parts List

    Model Mark DVD1920BKE3 DVD1920SRE3 DVD756SRE3 Ref. No. Mark Description Funai Parts No. DENON Parts No. MECHANICAL PARTS FRONT ASSEMBLY 1VM220754 00D 9H2 6000 642 FRONT ASSEMBLY 1VM220755 00D 9H2 6000 643 FRONT ASSEMBLY 1VM220760 00D 9H2 6000 644...
  • Page 51 DVD-1920/756 3 7 63 1515 0 Ref. No. Mark Description Funai Parts No. DENON Parts No. 2L109 P-TIGHT SCREW 3X8 BIND + GBMP3080 00D 9H2 6000 240 GIFT BOX CARTON 1VM321125 00D 9H2 6000 650 GIFT BOX CARTON 1VM321136...

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