Denon DVM-1845/745 Service Manual Download Page 36 | Manualshive

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DVM-1845/745

DVD Main 2/4 Schematic Diagram

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Summary of Contents for DVM-1845/745

Page 1: ...ase 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 8 X0336V 02 DE CDM 0802...

Page 2: ...vicing have been put back in their original posi tions inspect that no parts around the area that has been serviced have been negatively affected conduct an insulation check on the external metal conn...

Page 3: ...nce 100 k load Audio Output 4 Room Ambient 5 C 40 C Item Conditions Unit Nominal Limit 1 Video Output 75 load Vpp 1 0 0 1 2 Optical Digital Out dBm 18 3 Audio PCM 3 1 Output Level 1 kHz 0 dB Vrms 2 0...

Page 4: ...ug prongs and externally exposed accessible parts RF terminals antenna terminals video and audio input and output terminals microphone jacks earphone jacks etc is lower than or equal to the specified...

Page 5: ...achine then apply hot air to the Flat Pack IC about 5 to 6 seconds Fig S 1 1 2 Remove the flat pack IC with tweezers while applying the hot air 3 Bottom of the flat pack IC is fixed with glue to the C...

Page 6: ...by one using a sharp pin or wire to which solder will not adhere iron wire When heating the pins use a fine tip soldering iron or a hot air desoldering machine Fig S 1 4 3 Bottom of the flat pack IC i...

Page 7: ...rs Fig S 1 6 Note When using a soldering iron care must be taken to ensure that the flat pack IC is not being held by glue When the flat pack IC is removed from the CBA handle it gently because it may...

Page 8: ...ded 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 M on the workbench or other surf...

Page 9: ...1 1 3 Bracket Top D3 2 S 2 4 Stopper Bracket L R D3 4 S 3 5 Slide Tray Assembly D4 D5 CN5001 CN5004 2 3 4 6 Function CBA D4 2 L 2 CN2201 1 Top Cover 2 Front Assembly 3 Bracket Top 4 Stopper Bracket L...

Page 10: ...Fig D5 2 2 Short the three short lands of FPC cable with sol der before removing the FFC cable CN5004 on the Relay CBA If you disconnect the FFC cable without shorting them the laser diode of pickup...

Page 11: ...Turn Fig D4 Slide Tray Assembly Screw A Rotary tray washer Rotary tray washer B Chuck arm View for A Short the three short lands by soldering Either of two places FPC Cable A Rotary tray spring Relay...

Page 12: ...Guide R Unit 9 Tray Guide L CN3004 CN3003 S 9 Fig D7 S 10 Belt L 11 Loading Pulley 12 Slide Tray Gear B 14 Motor Assembly 15 Switch CBA S 12 L 4 13 Slide Tray Gear A 16 Tray Guide R P 1 S 11 Fig D8 C...

Page 13: ...13 DVM 1845 745 S 15 20 PCB Holder 19 DVD Main CBA Unit Fig D10...

Page 14: ...e order Bend route and dress the cables as they were originally 3 Plate Holder 2 4 Plate Holder 3 5 Plate Spring 6 Belt L 7 Gear Plate 8 Mecha Cable 9 Detector Switch 10 Rotary Motor Assembly 11 Relay...

Page 15: ...cable View for A in Fig MD5 6 Disassembly note Remove the spring P 2 Then remove the Slot Lever with the Rotary Stopper while turning the Slot Lever in the direction of the arrow as shown in Fig MD6...

Page 16: ...3 Plate Holder 2 4 Plate Holder 3 S 2 S 3 S 4 S 4 Fig MD3 8 Mecha Cable 8 Mecha Cable 9 Detector Switch Detector Switch DC Mini Motor 10 Rotary Motor Assembly 6 Belt L 7 Gear Plate 5 Plate Spring Bot...

Page 17: ...places FPC Cable A S 9 S 9 CN5003 CN5005 Fig MD5 Fig MD6 Pin E Pin C Pin B turn P 2 Pin C Pin E Pin D Pin D Slot C Slot B Slot A Slot A Slide Tray 15 Motion Gear 12 Slot Lever 13 Rotary Stopper 12 Slo...

Page 18: ...18 DVM 1845 745 Fig MD7 P 3 W 3 W 2 W 4 S 11 S 10 17 Rotary Tray Gear 20 Idler Arm 19 Idler Pad 18 Idler Gear 16 Loading Pulley 21 Slide Tray Chassis...

Page 19: ...ective No Check CHG 3 3V line and service it if defective See FLOW CHART No 2 The fuse blows out No FLOW CHART NO 2 The fuse blows out After servicing replace the fuse Check the presence that the prim...

Page 20: ...upplied to the emitter of Q1002 Is the voltage of base on Q1002 lower than the voltage of emitter on Q1002 when turning the power on Replace Q1002 Check D1030 C1035 C1048 L1009 and the periphery circu...

Page 21: ...tube does not light up Is 3 3V voltage supplied to Pin 13 and Pin 43 of IC2001 Is the voltage of approximately 19V supplied to Pin 30 of IC2001 Replace the fluorescent display tube or IC2001 Check th...

Page 22: ...ton SW2215 No 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 Replace the infrared r...

Page 23: ...t is poor FLOW CHART NO 18 No Disc indicated When the focus servo is not functioning FLOW CHART NO 19 No Disc indicated When the laser beam does not light up Replace the DVD Main CBA Unit Replace the...

Page 24: ...he VIDEO OUT terminal JK1404 Are the luminance signals outputted to the S OUT terminal JK1401 Are the chroma signals outputted to the S OUT terminal JK1401 No No No No Are the composite video signals...

Page 25: ...CBA Unit or DVD Mechanism Replace the DVD Main CBA Unit or DVD Mechanism Replace IC1201 Check the periphery between Pins 1 7 of IC1201 and JK1201 and service it if defective Check each line between e...

Page 26: ...of IC3001 Is the normal control voltage outputted to pins 2 4 of IC3003 Check the switches SW2208 2209 2211 2214 and their periphery and service it if defective Replace IC3001 Replace Rotary Motor Ch...

Page 27: ...TUATOR DRIVE 126 TRAY IN SLD 67 SPDL 66 TRACKING DRIVE 127 FOCUS DRIVE 64 57 ADAC MD 58 ADAC MC 59 ADAC ML ADAC MC ADAC ML AUDIO MUTE ADAC MD AUDIO MUTE SPINDLE MOTOR SLED MOTOR VREF RESET 70 RESET IC...

Page 28: ...CN5002 1 D SENS A 1 2 RT SENS A 2 CN5001 CN3001 8 D SENS A 8 6 RT SENS A 6 CN5001 CN3001 7 RM2 7 5 RM1 5 CN5001 CN3001 1 CHK ON 1 3 CHK OFF 3 3 ST OPEN 3 M LOADING MOTOR M CN5002 RM2 9 RM1 8 CN5002 C...

Page 29: ...VD MAIN CBA UNIT TO VIDEO AUDIO BLOCK DIAGRAM TO VIDEO AUDIO BLOCK DIAGRAM IC501 SDRAM SDRAM DATA 0 15 SDRAM ADDRESS 0 10 194 209 2 13 42 53 22 26 29 34 159 178 99 98 97 AUDIO SIGNAL D A D A 129 130 P...

Page 30: ...P 2dB AMP LPF DRIVER 3 1 5 6 7 WF2 WF1 18 1 VIDEO Y I VIDEO Y I JK1404 VIDEO OUT COMPOSITE WF3 VIDEO Pb Cb OUT VIDEO Y OUT VIDEO Pr Cr OUT 4 3 1 2 TMDS DATA2 CNF01 HDMI CONNECTOR TMDS DATA2 TMDS DATA1...

Page 31: ...BLOCK DIAGRAM TO SYSTEM CONTROL 1 BLOCK DIAGRAM TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM DVD MAIN CBA UNIT AV CBA JK1202 IC1204 JK1201 IC601 AUDIO DAC 15 14 16 1 7 6 8 4 3 2 5 AUDIO SERIAL PORT SERIAL...

Page 32: ...Q1011 SCHOTTKY BARRIER SCHOTTKY BARRIER TO DVD MAIN CBA UNIT CN401 TO CHANGER CBA CN3102 A V F TO SYSTEM CONTROL 2 BLOCK DIAGRAM PWSW POWCON PWCHK Q1022 CAUTION Fixed voltage or Auto voltage selectab...

Page 33: ...rk in the schematic diagram and the parts list Before replacing any of these components read the parts list in this manual carefully The use of substitute replacement parts that do not have the same s...

Page 34: ...gs were prepared 2 To maintain original function and reliability of repaired units use only original replacement parts which are listed with their part numbers in the parts list section of the service...

Page 35: ...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: ...36 DVM 1845 745 DVD Main 2 4 Schematic Diagram...

Page 37: ...37 DVM 1845 745 DVD Main 3 4 Schematic Diagram...

Page 38: ...38 DVM 1845 745 DVD Main 4 4 Schematic Diagram...

Page 39: ...supply Otherwise it may cause some components in the power supply circuit to fail NOTE The voltage for parts in hot circuit is measured using hot GND as a common terminal Ce symbole repr sente un fusi...

Page 40: ...40 DVM 1845 745 AV 2 2 Schematic Diagram...

Page 41: ...41 DVM 1845 745 Changer 1 2 Function Power Switch Switch Schematic Diagram...

Page 42: ...ALL RPT SACD CD DVD A TL GR TR CP B PSCAN 5G 4G 3G 2G 1G 7G 6G 7G 6G 5G 4G 3G 2G 1G a b c d e f g c d e f f g c d e f g c d e f g c d e f g c d e f g h h h i a b c d e g a b a b a b a b a b c d e f g...

Page 43: ...43 DVM 1845 745 Relay Sensor Mecha Pick Up Unit Schematic Diagram...

Page 44: ...N1601 C1402 PLUS LEAD Pin 11 of CN1601 Pin 13 of CN1601 Pin 9 of CN1601 20 s 0 2V VIDEO Y VIDEO C 0 2V 20 s VIDEO CVBS 0 5V 20 s AUDIO L 0 5V 0 5ms AUDIO R 0 5V 0 5ms SPDIF 1V 0 1 s NOTE Measuring Dis...

Page 45: ...PICK UP UNIT 11 20 13 15 16 18 17 19 9 10 7 8 5 6 4 GND 12 NU 14 NU VREF P ON 5V C B D A PD MONI DVD LD 1 TS 1 SP 2 SP 3 GND 4 SL 5 SL 6 TRAY IN 2 FS 3 FS GND LD GND CD PD TS GND DVD PD CD LD CD DVD F...

Page 46: ...g e appears on the VFD Fig f At this time no button is available 6 Remove the disc on the tray 7 Unplug the AC cord from the AC outlet Then plug it again 8 Turn the power on by pressing the ON STANDBY...

Page 47: ...ears on the screen When OK appears on the screen the factory default will be set Then the firmware renewal mode is complete 11 To exit this mode press ON STANDBY button MODEL Version Region EEPROM CLE...

Page 48: ...irm 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 TRAY LOCK ON will appear at upper right on the sc...

Page 49: ...205 Y AT P KTA1273 Y AT P KRA110M AT P KRC110M AT P KTA1267 Y AT P KTC3199 GR AT P 1 4 8 5 KIA4558P P RC4580IP UTC4558 CXA1511M T4 MM1636XWRE 0C 0805T 002 1 2 3 Note A Anode K Cathode E Emitter C Coll...

Page 50: ...2L032 2L032 W3002 A1X A15 2L011 2L031 2L031 2L041 2L011 2L051 2L051 1L016 1B12 1B4 1B11 D 3 2L011 2L103 2L011 A A B B C D C F E F E 1B32 1B31 2L032 JK3501 JK1404 1L023 1B33 1L017 2L033 2L033 2L043 2L0...

Page 51: ...1 2 B1 6 B1 36 B1 7 B1 9 B1 52 B1 37 B1 8 L1 26 L1 25 L1 6 L1 11 L1 15 L1 11 L1 23 L1 7 B1 12 B1 13 B1 14 B1 15 B1 16 B1 20 B1 19 B1 21 SW5001 L1 5 B1 5 B1 4 B1 38 Relay CBA Sensor CBA Relay CBA Senso...

Page 52: ...CAL PARTS B1 2 W5001 ROTARY MOTOR ASSEMBLY MECHA HOLDER ASSEMBLY RELAY CBA SENSOR CBA 1B4 00D 9H2 6000 328 LOADING PULLEY 0VM304636 1 1B11 00D 9H2 6000 329 MOTOR PULLEY 21P7048 1 1B12 00D 9H2 6000 330...

Page 53: ...IND HEAD MMDZB4EMM003 1 2L032 SCREW P TIGHT M3X8 BIND HEAD WX1E8620 902 1 2L033 SCREW B TIGHT M3X8 BIND HEAD WX1E8700 003 1 2L041 SCREW P TIGHT M3X6 BIND HEAD WX1E8700 009 1 2L043 SCREW TAP TIGHT M3X5...

Page 54: ...PLATE HOLDER 2 0VM305255 1 B1 16 00D9H26000826 PLATE HOLDER 3 0VM305243 1 B1 19 00D9H26000827 STOP LEVER 0VM304633 1 B1 20 00D9H26000828 ROTARY STOPPER 0VM304634B 1 B1 21 00D9H26000829 STOPPER SPRING...

Page 55: ...55 DVM 1845 745 Chief Ingredient of FAG 102R Hydrocarbon synthetic oil Lithium soap Additives NOTE Apply some grease to the Fill Color position...

Page 56: ...56 DVM 1845 745 Chief Ingredient of FAG 102R Hydrocarbon synthetic oil Lithium soap Additives NOTE Apply some grease to the Fill Color position...

Page 57: ...57 DVM 1845 745 Packing X10 X22 X21 X5 X2 X4 S2 S2 S3 S3 S1 A30 A30 A22 S10 X1 S4 Unit...

Page 58: ...for DVM745 1VM323803 1 S2 00D 9H2 6000 317 FRONT PAD 0VM101008A 2 S3 00D 9H2 6000 736 REAR PAD 0VM101007A 2 S4 00D 9H2 6000 688 SET BAG 0DM400731D 1 S10 00D 9H2 6000 811 TRAY PAD 1VM425290 1 X1 00D 9...

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