For U.S.A. & Canada model SERVICE MANUAL MODEL Ver. 2 DVD-1920/756 DVD AUDIO-VIDEO / SUPER AUDIO CD PLAYER 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。 ● For purposes of improvement, specifications and design are subject to change without notice.
DVD-1920/756 TABLE OF CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 LASER BEAM SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DVD-1920/756 SPECIFICATIONS Item Conditions Unit Nominal Limit 1. Video Output 75 Ω load Vpp 1.0 ± 0.1 2. Coaxial Digital Out 75 Ω load mVpp 500 ± 50 3-1. Output Level 1 kHz, 0 dB, 47k Ω load Vrms 2.0 3-2. S/N 47k Ω load dB 115 DVD fs = 48 kHz ± 0.5 dB, 47k Ω load Hz 20 ~ 22 k CD fs = 44.1 kHz ± 0.5 dB, 47k Ω load Hz 20 ~ 20 k 1 kHz, 0 dB, 47k Ω load % 0.004 3. Audio (PCM) 3-3. Freq. Response 3-4. THD+N DVD, CD Notes: 1.
DVD-1920/756 LASER BEAM SAFETY PRECAUTIONS 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. The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30 cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.
DVD-1920/756 IMPORTANT SAFETY PRECAUTIONS Product Safety Notice I. Also check areas surrounding repaired locations. J. Be careful that foreign objects (screws, solder droplets, etc.) do not remain inside the set. Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc.
DVD-1920/756 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.
DVD-1920/756 STANDARD NOTES FOR SERVICING Circuit Board Indications Pb (Lead) Free Solder 1. The output pin of the 3 pin Regulator ICs is indicated as shown. When soldering, be sure to use the Pb free solder. Top View Out How to Remove / Install Flat Pack-IC Bottom View In 1. Removal Input With Hot-Air Flat Pack-IC Desoldering Machine: 1. Prepare the hot-air flat pack-IC desoldering machine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1) 2.
DVD-1920/756 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 pin or the solder lands under the IC when removing it. CBA 1. Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig.
DVD-1920/756 With Iron Wire: 2. Installation 1. Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3) 1. Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily. 2. Affix the wire to a workbench or solid mounting point, as shown in Fig. S-1-5. 2.
DVD-1920/756 Instructions for Handling Semiconductors 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. 2.
DVD-1920/756 CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route, and dress the cables as they were originally. [1] Top Cover [2] Front Unit [4] Function CBA [3] Tray Panel [5] Front Assembly [6] Rear Panel [7] DVD Main CBA Unit [11] LED CBA [9] Jack PCB Holder [12] AV CBA Part Fig. No.
DVD-1920/756 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 two Locking Tabs (L-1), then release two Locking Tabs (L-2). (L-4) (L-4) 2) Release three Locking Tabs (L-3). 3) Disconnect connector CN2001 and remove the Front Assembly. (L-2) 2.
DVD-1920/756 (S-8) [6] Rear Panel (S-8) (S-3) (S-5) (S-3) (S-4) (S-3) [10] DVD Mechanism Fig. D4 Fig. D6 (S-9) (S-6) (S-9) [8] 5.1ch Amp CBA [9] Jack PCB Holder [7] DVD Main CBA Unit (S-10) [11] LED CBA CN7101 (S-7) (S-6A) CNS01 (S-6B) CN2102 CN201 [12] AV CBA CN601 (L-5) A CN301 CN401 Fig. D7 Short the three short lands by soldering. (Either of two places.) Connector View for A Fig.
DVD-1920/756 (S-11) (S-11) [13] Loader Base [14] Power PCB Holder [15] Main PCB Holder (S-12) (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.
DVD-1920/756 HOW TO INITIALIZE THE DVD PLAYER 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. a appears on the screen. "*******" differ depending on the models. MODEL : ******* Version : *.** Region : * EEPROM CLEAR : CLEAR EXIT: POWER Fig. a 2. Press [CLEAR] button on the remote control unit. Fig. b appears on the screen.
DVD-1920/756 FIRMWARE RENEWAL MODE 5. After programming is finished, the tray opens automatically. Fig. e appears on the screen and the checksum in (*2) of Fig. e appears on the VFD (Fig. f). 1. Turn the power on and remove the disc on the tray. 2. To put the DVD player into version up mode, press [9], [8], [7], [6], and [SEARCH MODE] buttons on the remote control unit in that order. The tray will open automatically. Fig. a appears on the screen and Fig. b appears on the VFD.
DVD-1920/756 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. h 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 [POWER OFF] button.
DVD-1920/756 TROUBLESHOOTING FLOW CHART NO.1 The power cannot be turned on. Is the fuse normal? Yes Is normal state restored when once unplugged power cord is plugged again after several seconds? Yes Is the EV +3.3V line voltage normal? Yes Check each rectifying circuit of the secondary circuit and service it if defective. No No No See FLOW CHART No.2 Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective.
DVD-1920/756 FLOW CHART NO.6 P-ON+10V (EV+10V) is not outputted. Is 10V voltage supplied to the emitter of Q1002? No Check D1030, D1048, C1035, C1048, L1009, and the periphery circuit, and service it if defective. Yes No Is the voltage of base on Q1002 lower than the voltage of emitter on Q1002 when turning the power on? Check Q1016 and PWRCON line and service it if defective. Yes Replace Q1002. FLOW CHART NO.7 P-ON+5V is not outputted. (EV+10V is outputted normally.
DVD-1920/756 FLOW CHART NO.12 The fluorescent display tube does not light up. Is 3.3V voltage supplied to Pins(6,24) of IC2001? Yes Is the voltage of approximately -20V supplied to Pin(15) of IC2001? Yes No No Check the -FL (-20V) line and service it if defective. No Check R2002, IC2001 and their periphery, and service it if defective.
DVD-1920/756 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 IC2001? Refer to "FLOW CHART NO.13" No Replace the "OPEN/CLOSE" button (SW2108). Yes Refer to "FLOW CHART NO.16" FLOW CHART NO.16 The disc tray cannot be opened and closed. Replace the DVD Main CBA Unit. No improvement can be found.
DVD-1920/756 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. Yes No 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.
DVD-1920/756 FLOW CHART NO.22 Audio is not outputted normally. Set the disc on the disc tray, and playback. Are the analog audio signals outputted to each pin of CN1601 on AV CBA? No Replace the DVD Main CBA Unit or DVD Mechanism. CN1601 13PIN AUDIO(L) CN1601 15PIN AUDIO(R) Yes Are the analog audio signals inputted to each pin of IC1201. No IC1201 2PIN AUDIO(L) IC1201 6PIN AUDIO(R) Check each line between each pin of CN1601 and each pin of IC1201 on AV CBA, and service it if detective.
DVD-1920/756 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. No Replace the DVD Main CBA or DVD Mechanism. CN7102 15PIN FRONT(L) CN7102 13PIN FRONT(R) CN7102 11PIN SURROUND(L) CN7102 9PIN SURROUND(R) CN7102 7PIN CENTER CN7102 5PIN SUBWOOFER Yes Are the analog audio signals inputted to each pin of IC7301, IC7401 and IC7501.
FG SENSOR FG CBA M SLED MOTOR M SPINDLE MOTOR TRAY-IN DRIVE CBA TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM TO AUDIO BLOCK DIAGRAM SP(+) SP(-) TRAY-IN GND SL(-) SL(+) FG-IN TS(+) TS(-) FS(+) FS(-) M-MUTE A-MUTE ADAC-MD ADAC-MC ADAC-ML CN301 3 4 5 6 7 8 1 - 12 13 10 9 5 6 3 2 - + - + - + IC202 (OP AMP) 23 6 4 5 3 1 2 25 24 27 26 14 8 7 1 VREF RESET 1 IC461 DVD MAIN CBA UNIT +3.
FS PICK-UP UNIT TS DETECTOR FS(+) FS(-) TS(+) TS(-) CD-LD DVD-LD PD-MONI GND(DVD-PD) GND(CD-PD) GND(LD) C D A B E F CD/DVD FS(+) FS(-) TS(+) TS(-) 4 6 DATA RAM INST. ROM 7 X101 186 CLK27M TIMER X'TAL OSC CLK GENE.
TO AUDIO BLOCK DIAGRAM I2C-SCL I2C-SDA YC(0-7) SPDIF PCM-DATA3 PCM-DATA2 PCM-DATA1 PCM-DATA0 PCM-LRCK PCM-BCK PCM-SCLK CLOCK-PULSE SDRAM ICF02 (SDRAM) TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM VIDEO-Y(I) VIDEO-C 60 24 27 ~ 2 66 ~ 13 31 ~ 56 74 ~ 85 ~ 1 2 F/F 5 3 ICF06 (FLIP FLOP) YC(0-7) SDRAM DATA(0-31) SDRAM ADDRESS(0-10) 16-18, 26-30 B(2-7)/R(0,1) 91 4-9, 12,13 G(0-7) 50 103 191 XTAL-IN 195
TO SYSTEM CONTROL /SERVO BLOCK DIAGRAM TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM TO SACD BLOCK DIAGRAM TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM TO SACD BLOCK DIAGRAM TO SYSTEM CONTROL /SERVO BLOCK DIAGRAM TO SACD BLOCK DIAGRAM ADAC-MD ADAC-ML ADAC-MC SD7 SD0/SPDIF SACD SD2 SD3 SD1 SD4 SD5 SD6 DSD-CLK DSD-MXL DSD-MXR DSD-FL DSD-FR DSD-C DSD-SW DSD-LS DSD-RS CLK33M/36M SACD-RESET M-MUTE A-MUTE 1 2 4 ICS07 (AND GATE) 4 ICS11 (AND GATE) 4 ICS10 (AND GATE) 4 ICS21 (AND GATE) 2 1 1 2
TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM TO SYSTEM CONTROL/SERVO BLOCK DIAGRAM PCM-SCLK SD0/SPDIF SD1 SD2 SD3 SD4 SD5 SD6 SD7 XSAK XSHD SDCK SACD-RESET XSRQ SDEF PSP-WCK SACD-READY SACD-DATA SACD-LATCH ADAC-MD ADAC-MC 1 2 1 2 4 ICS08 (AND GATE) 4 ICS13 (AND GATE) SACD-RESET SACD-RESET XSRQ SDEF WCK SACD-READY SACD-DATA SACD-LATCH 169 170 171 172 173 174 175 176 STREAM MANAGER DVD MAIN CBA UNIT 167 XSAK 165 XSHD 166 SDCK 31 9 164 168 123 7 6 2
AC1001 AC CORD A V LINE FILTER L1001 30 LATCH Q1008 F F1001 1A 250V AV CBA SWITCHING SWITCHING CONTROL HOT Q1001 Q1003 BRIDGE RECTIFIER D1001, D1002 D1004, D1005 HOT CIRCUIT. BE CAREFUL. 3 4 2 1 RECTIFIER D1016 RECTIFIER D1030 D1008 SCHOTTKY BARRIER D1006 SCHOTTKY BARRIER RECTIFIER D1003 Q1015 Q1005 Q1021 Q1011 Q1020 +1.2V REG. IC1002 Q1004 INV-POWCON TO SYSTEM CONTROL/SERVO BLOCK DIAGRAM -FL F1 F2 P-ON+10V EV+3.
DVD-1920/756 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.
DVD-1920/756 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: F A V 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. RISK OF FIRE-REPLACE FUSE AS MARKED. This symbol means fast operating fuse. Ce symbole represente un fusible a fusion rapide. 2.
DVD-1920/756 DVD Main 1/7 Schematic Diagram 33
DVD-1920/756 DVD Main 2/7 Schematic Diagram 34
DVD-1920/756 IC101 Voltage Chart ~ : Voltage is not consistent PIN.NO PLAY 1 3.4 STOP 3.4 PIN.NO PLAY 33 ~ STOP ~ PIN.NO PLAY 65 ----- STOP ----- PIN.NO PLAY 97 STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY ----- : Not used STOP Unit : Volts PIN.NO PLAY 0 0 129 2.3 2.3 161 0 0 193 3.2 3.2 225 1.9 STOP 1.9 2 0 0 34 0 0 66 3.4 3.4 98 0 0 130 2.3 2.3 162 1.7 1.7 194 3.2 3.2 226 0 0 3 3.5 3.5 35 3.5 3.5 67 3.4 3.4 99 0 0 131 2.3 2.
DVD-1920/756 DVD Main 3/7 Schematic Diagram 36
DVD-1920/756 DVD Main 4/7 Schematic Diagram 37
DVD-1920/756 DVD Main 5/7 Schematic Diagram 38
DVD-1920/756 DVD Main 6/7 Schematic Diagram 39
DVD-1920/756 DVD Main 7/7 Schematic Diagram 40
DVD-1920/756 AV 1/3 Schematic Diagram F CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F1001) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail. A V CAUTION ! For continued protection against fire hazard, replace only with the same type fuse.
DVD-1920/756 AV 2/3 Schematic Diagram 42
DVD-1920/756 AV 3/3, Function & LED Schematic Diagram FL2001 MATRIX CHART 7G a e REPEAT A B ALL f f b c d g 7G 6G 5G VCR REPEAT TITLE GROUP A B ALL f i i 4G 3G 2G h 1G REC SACD CHP TRK PSCAN DVD A PM HD VCD c f a d g i b e 43 i 6G 5G 4G 3G 2G 1G a a a a a SACD b b b c c c d d d e e e f f f g g g GROUP TITLE VCR PSCAN DVD d d A e e P f f M g g HD CHP TRK V REC CD b b c c
DVD-1920/756 5.
DVD-1920/756 WAVEFORMS WF1 Pin 8 of CN1601 VIDEO-Y WF2 0.1V 0.1V Pin 15 of CN1601 AUDIO(R) 20µs Pin 10 of CN1601 VIDEO-C WF3 WF5 WF6 20µs 1V 0.5ms Pin 18 of CN1601 SPDIF 1V 0.1µs C1402 PLUS LEAD NOTE: VIDEO-CVBS WF4 0.5V Input CD: 1kHz PLAY (WF4~WF6) DVD: POWER ON (STOP) MODE (WF1~WF3) 20µs Pin 13 of CN1601 AUDIO(L) 1V 0.
CN2002 1 2 3 4 5 6 7 AV CBA DIGITAL S-VIDEO AUDIO OUT (COAXIAL) OUT DIGITAL AUDIO OUT (OPTICAL) 46 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 DRIVE CBA SPINDLE MOTOR SLED MOTOR DVD MECHANISM M M TS PICK UP UNIT DETECTOR 7 9 11 2 3 6 5 4 8 7 6 5 4 3 2 1 TRAY-IN SL(+) SL(-) GND TRAY-IN SP(-) SP(+) P-ON+3.
DVD-1920/756 LEAD IDENTIFICATIONS 2SA1015-Y(TE2 F T) 2SA1015-Y(TPE2) 2SC2120-Y(TE2 F T) 2SC2120-Y(TPE2) 2SC2236-Y-TPE6 C KTA1266(Y) KTA1266-Y-AT/P KTC3203(Y) KTC3203-Y-AT/P KTC3205(Y) KTC3205-Y-AT/P 2SA966-Y(TE6 F M) 2SA966(Y) KTC3198(Y) 2SC1815-GR(TE2 F T) 2SC1815-GR(TPE2) KTA1267(Y) KTA1267Y-AT/P KTC3199(GR) KTC3199-GR-AT/P KTC3198-Y-AT/P BN1L3Z(P) KRA105M-AT/P KRA110M-AT/P KTA1273(Y) E C B E C B NJM4580M-TE1 RC4580IP MM1636XWRE CXA1511M-T4 8 1 5 4 PT6313-S-TP(L) SC16313G 15 28 EL817B EL817C LTV-
DVD-1920/756 EXPLODED VIEWS Cabinet See Electrical Parts List for parts with this mark. 2L109 Some Ref. Numbers are not in sequence. 5.
DVD-1920/756 Packing X21 X12 X10 X5 X2 S2 X1 X4 S4 S2 Unit A22 A30 S1 A30 49
DVD-1920/756 PARTS LIST NOTE: Parts that are not assigned part numbers (---------) are not available. PRODUCT SAFETY NOTE: Products marked with a ! have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don't degrade the safety of the product through improper servicing. Ref. No.
DVD-1920/756 Ref. No. Mark 2L109 DENON Parts No. Qty P-TIGHT SCREW 3X8 BIND + Description GBMP3080 Funai Parts No.
