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Denon DVM-1845/745 Service Manual

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MODEL
DVM-1845/745
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
DVD VIDEO AUTO CHANGER
e
Denon Brand Company, D&M Holdings lnc.
E3
E2
EK
注 意
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。
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. 2
Please refer to the
MODIFICATION NOTICE.
E2A E1C E1K EUT
X0336V.02 DE/CDM 0802

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Summary of Contents for Denon DVM-1845/745

  • 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。 Denon Brand Company, D&M Holdings lnc. X0336V.02 DE/CDM 0802...

  • Page 2: Safety Precautions

    DVM-1845/745 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

    DVM-1845/745 SPECIFICATIONS Item Conditions Unit Nominal Limit 1. Video Output load ± 0.1 2. Optical Digital Out 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

    DVM-1845/745 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.

  • Page 5: Standard Notes For Servicing

    DVM-1845/745 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...
  • Page 6 DVM-1845/745 With Soldering Iron: 3. The flat pack-IC on the CBA is affixed with glue, so 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

    DVM-1845/745 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...

  • Page 8: Instructions For Handling Semi- Conductors

    DVM-1845/745 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

    DVM-1845/745 CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart REMOVAL REMOVE/*UNHOOK/ LOC. PART Fig. This flowchart indicates the disassembly steps to gain UNLOCK/RELEASE/ Note access to item(s) to be serviced. When reassembling, UNPLUG/DESOLDER follow the steps in reverse order. Bend, route, and Power Switch dress the cables as they were originally.

  • Page 10: Reference Notes

    DVM-1845/745 Reference Notes (L-1) CAUTION 1: Locking Tabs (L-1) are fragile. Be careful not to break them. 1-1. To release eight Locking Tabs (L-1), first release (L-1) five Locking Tabs (A), and then three Locking Tabs (B). (Fig. D2) CAUTION 2: Electrostatic breakdown of the laser...
  • Page 11 DVM-1845/745 Screw A Chuck arm [5] Slide Tray Assembly Rotary tray washer Rotary tray spring Rotary tray washer CN2103 (S-4) Turn Slide Tray [7] Power Assembly (L-2) Switch CBA Short the three short lands by soldering. (L-2) Slide Tray CN2201 (Either of two places.)
  • Page 12 DVM-1845/745 [12] Slide Tray Gear (B) (S-11) (S-5) [13] Slide Tray Gear (A) (S-6) (P-1) (S-5) [8] Rear Panel (S-10) (S-6) (S-5) (S-6) [15] Switch Belt L [11] Loading Pulley (S-7) (S-12) (S-5) [16] Tray Guide (R) (L-4) [14] Motor Assembly Fig.
  • Page 13 DVM-1845/745 (S-15) [19] DVD Main CBA Unit [20] PCB Holder Fig. D10...
  • Page 14 DVM-1845/745 SLIDE TRAY ASSEMBLY DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When Reassembly, follow the steps in reverse order. Bend, route, and dress the cables as they were originally.
  • Page 15 DVM-1845/745 Reference Notes 2. Disassembly Method 1. Disassembly note REMOVAL Slide the Rotary Tray slowly in the direction of the REMOVE/*UNHOOK/ PART Fig. front while rotating it. UNLOCK/RELEASE/ Note .No. UNPLUG/DESOLDER 2. Reassembly note Align the rails on the Rotary Tray with the slot on...
  • Page 16 DVM-1845/745 (S-1) Slide Tray [1] Chuck Arm (P-1) Clamper (W-1) (W-1) Yoke Magnet [8] Mecha Desolder Cable [9] Detector Switch Lead Desolder (S-8) clamper [10] Rotary Motor Assembly Fig. MD1 [6] Belt L [7] Gear Plate (S-6) (S-6) (S-7) (S-6)
  • Page 17 DVM-1845/745 [13] Rotary Slide Tray CN5005 CN5003 Stopper [15] Motion Pin B Gear Slot A (P-2) Pin D turn [12] Slot Lever Slot B Pin C Slot C Pin E [14] Mecha Holder Assembly (S-9) (S-9) Pin E [11] Relay CBA + Sensor CBA...
  • Page 18 DVM-1845/745 [21] Slide Tray Chassis [20] Idler [19] Idler [18] Idler Gear [16] Loading (P-3) Pulley [17] Rotary (W-3) Tray Gear (W-2) (W-4) (S-10) (S-11) Fig. MD7...

  • Page 19: Troubleshooting

    DVM-1845/745 TROUBLESHOOTING FLOW CHART NO.1 FLOW CHART NO.1 The power cannot be turned on. The power cannot be turned on. Is the fuse normal? Is the fuse normal? See FLOW CHART No.2 <The fuse blows out.> See FLOW CHART No.2 <The fuse blows out.>...
  • Page 20 DVM-1845/745 FLOW CHART NO.6 P-ON+10V (EV+10V) is not outputted. Is 10V voltage supplied to the emitter of Q1002? Check D1030, C1035, C1048, L1009 and the periphery circuit, and service it if defective. Check Q1016 and service it if defective. Is the voltage of base on Q1002 lower than the voltage of emitter on Q1002 when turning the power on? Replace Q1002.
  • Page 21 DVM-1845/745 FLOW CHART NO.12 The fluorescent display tube does not light up. Is 3.3V voltage supplied to Pin(13) and Check the P-ON+3.3V line and service it if defective. Pin(43) of IC2001? Is the voltage of approximately -19V Check the -FL line and service it if defective.
  • Page 22 DVM-1845/745 FLOW CHART NO.14 No operation is possible from the remote control unit. Operation is possible from the DVD, but no operation is possible from the remote control unit. Check CHG+5V line and service it if defective. Is 5V voltage supplied to the Pin(3) terminal of the infrared remote control receiver (RM2001)? Is the "L"...
  • Page 23 DVM-1845/745 FLOW CHART NO.18 [No Disc] indicated. (When the focus servo is not functioning.) 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.19 [No Disc] indicated. (When the laser beam does not light up.) Replace the DVD Main CBA Unit.
  • Page 24 DVM-1845/745 FLOW CHART NO.21 Picture does not appear normally. Set the disc on the disc tray, and playback. Replace the DVD Main CBA Unit or DVD Mechanism. Are the video signals outputted to each pin of CN1601 on the AV CBA?
  • Page 25 DVM-1845/745 FLOW CHART NO.22 Audio is not outputted. 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?
  • Page 26 DVM-1845/745 FLOW CHART NO.23 Rotary tray does not function. Is the normal control voltage inputted to pins Check the switches (SW2208, 2209, 2211 - 2214) (40, 41) of IC3001? For each terminal voltage, and their periphery, and service it if defective.

  • Page 27: Block Diagrams

    DVM-1845/745 BLOCK DIAGRAMS System Control-1 Block Diagram...
  • Page 28 DVM-1845/745 System Control-2 Block Diagram...

  • Page 29: Digital Signal Process Block Diagram

    DVM-1845/745 Digital Signal Process Block Diagram...

  • Page 30: Video / Audio Block Diagram

    DVM-1845/745 Video / Audio Block Diagram...

  • Page 31: Audio Block Diagram

    DVM-1845/745 Audio Block Diagram...

  • Page 32: Power Supply Block Diagram

    DVM-1845/745 Power Supply Block Diagram...

  • Page 33: Schematic Diagrams / Cba's And Test Points

    DVM-1845/745 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 34 DVM-1845/745 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 35 DVM-1845/745 DVD Main 1/4 Schematic Diagram 1 NOTE: Either IC461 or IC462 is used for DVD MAIN CBA UNIT.
  • Page 36 DVM-1845/745 DVD Main 2/4 Schematic Diagram...
  • Page 37 DVM-1845/745 DVD Main 3/4 Schematic Diagram...
  • Page 38 DVM-1845/745 DVD Main 4/4 Schematic Diagram...
  • Page 39 DVM-1845/745 AV 1/2 Schematic Diagram CAUTION ! CAUTION ! For continued protection against fire hazard, Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. NOTE: replace only with the same type fuse. If Main Fuse (F1001) is blown , check to see that all components in the power supply...
  • Page 40 DVM-1845/745 AV 2/2 Schematic Diagram...
  • Page 41 DVM-1845/745 Changer 1/2 , Function , Power Switch & Switch Schematic Diagram...
  • Page 42 DVM-1845/745 Changer 2/2 Schematic Diagram FL2001 MATRIX CHART TL./GR. TR. /CP. PSCAN DVD A SACD TL./GR. RPT. TR./CP. PSCAN SACD...
  • Page 43 DVM-1845/745 Relay , Sensor , Mecha & Pick Up Unit Schematic Diagram...
  • Page 44 DVM-1845/745 WAVEFORMS Pin 7 of CN1601 Pin 13 of CN1601 AUDIO(R) 0.5V 0.5ms VIDEO-Y 0.2V 20µs Pin 9 of CN1601 Pin 15 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...

  • Page 45: Wiring Diagram

    DVM-1845/745 WIRING DIAGRAM...

  • Page 46: Firmware Renewal Mode

    DVM-1845/745 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...
  • Page 47 DVM-1845/745 10. Press [CLEAR] button on the remote control unit. Fig. h appears on the screen. " ******* " differs depending on the models. MODEL : ******* Version : *.** Region : * EEPROM CLEAR : OK EEPROM CLEAR : CLEAR EXIT: POWER Fig.

  • Page 48: Tray Lock Mode

    DVM-1845/745 TRAY LOCK MODE Tray Lock Mode is defeated a tray-open/close to prevent a case of disc theft in demo mode. Enter this mode as 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 49: Lead Identifications

    DVM-1845/745 LEAD IDENTIFICATIONS 2SK3498 KTC3205-Y-AT/P 2SC1815-GR(TE2 F T) KTA1273-Y-AT/P 2SA966-Y(TE6 F M) KRA110M-AT/P 2SA1015-Y(TE2 F T) KRC110M-AT/P KTA1266-Y-AT/P KTA1267-Y-AT/P KTC3203(Y) KTC3199-GR-AT/P G D S E C B E C B LD1117V PT204-6B-12 M38503G4A-131FP UZ1086L-ADJ BA6956AN 1: Vin 2: Vo 3: GND...

  • Page 50: Exploded Views

    DVM-1845/745 EXPLODED VIEWS Cabinet 1 2L021 2L021 2L021 2L021 2L021 2L021 Relay CBA 2L031 2B25 AC1001 2L031 2L032 W3004 JK1401 JK3501 2L011 JK1404 W3003 2L011 IC1204 JK1202 2L051 JK1201 2L041 2L041 AV CBA SCOTCH TAPE 2L011 2L103 DVD Main 2L012...
  • Page 51 DVM-1845/745 Cabinet 2 L1-6 B1-26 B1-41 B1-43 B1-24 B1-42 B1-3 B1-22 B1-24 B1-30 B1-30 B1-2 Mecha Holder Assembly B1-20 B1-6 B1-19 B1-36 B1-21 B1-7 SW5001 B1-37 B1-8 L1-5 B1-52 L1-26 L1-25 B1-5 B1-4 B1-38 B1-9 L1-6 Rotary Motor Assembly W5001...
  • Page 52 DVM-1845/745 PARTS LIST OF EXPLODED VIEW (CABINET1) ＊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.
  • Page 53 DVM-1845/745 Ref. No. nsp Part No. Part Name Remark Q'ty 2L012 SCREW TAP TIGHT M3X5 BIND 0VM413320A HEAD+BLK NI 2L021 SCREW TAP TIGHT M3X5 BIND GBJP3080 HEAD+BLK NI 2L031 SCREW P-TIGHT M3X8 BIND HEAD+ MMDZB4EMM003 2L032 SCREW P-TIGHT M3X8 BIND HEAD+...
  • Page 54 DVM-1845/745 PARTS LIST OF EXPLODED VIEW OF SLIDE MECHANISM UNIT (CABINET2) ＊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.
  • Page 55 DVM-1845/745...
  • Page 56 DVM-1845/745 NOTE : Apply some grease to the Fill Color position. Chief Ingredient of FAG-102R - Hydrocarbon synthetic oil - Lithium soap - Additives...
  • Page 57 DVM-1845/745 Packing Unit...
  • Page 58 DVM-1845/745 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.

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