PIONEER DJ DJM-750MK2 Service Manual
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PIONEER DJ DJM-750MK2 Service Manual

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DJ MIXER
DJM-750MK2
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model
Type
DJM-750MK2
LSYXJ
DJM-750MK2
UXJCB
DJM-750MK2
XJCN
THIS SERVICE MANUAL SHOULD BE USED TOGETHER WITH THE FOLLOWING MANUAL(S).
Model
DJM-750MK2
Pioneer DJ Corporation
2017 Pioneer DJ Corporation
Power Requirement
AC 110 V to 240 V
AC 110 V to 240 V
AC 220 V
Order No.
QRT1012
SCHEMATIC DIAGRAM, PCB CONNECTION DIAGRAM, PCB PARTS LIST
6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 Japan
DJM-750MK2
Remarks
ORDER NO.
QRT1011
Remarks

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Summary of Contents for PIONEER DJ DJM-750MK2

  • Page 1 THIS SERVICE MANUAL SHOULD BE USED TOGETHER WITH THE FOLLOWING MANUAL(S). Model Order No. Remarks DJM-750MK2 QRT1012 SCHEMATIC DIAGRAM, PCB CONNECTION DIAGRAM, PCB PARTS LIST Pioneer DJ Corporation 6F, Yokohama i-Mark Place, 4-4-5 Minatomirai, Nishi-ku, Yokohama, Kanagawa 220-0012 Japan 2017 Pioneer DJ Corporation...
  • Page 2 If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician. CAUTION Since the fuse may be in the neutral of the mains supply, disconnect the mains to de-energize the phase conductors. DJM-750MK2...

  • Page 3: Table Of Contents

    8.4 METHOD OF DVS CONNECTION CONFIRMATION....................55 8.5 ITEMS FOR WHICH USER SETTING ARE AVAILABLE ..................... 57 9. EXPLODED VIEWS AND PARTS LIST..........................58 9.1 PACKING SECTION ..............................58 9.2 EXTERIOR SECTION ..............................60 9.3 CHASSIS SECTION ..............................62 9.4 CONTROL PANEL SECTION ............................64 DJM-750MK2...
  • Page 4 11.2 PNLA ASSY................................39 11.3 AINB ASSY................................. 41 11.4 USBA, MICB, HPJK, HPJM, OLED and MTRM ASSYS..................... 43 11.5 CHFD, BFXB, PWSB, HPVR and CRFD ASSYS ....................... 45 11.6 SW POWER SUPPLY..............................47 12. PCB PARTS LIST ................................48 DJM-750MK2...

  • Page 5: Service Precautions

    C4638 and C4639 in the MAIN ASSY are locked with bond to prevent solder cracks caused by fall or vibration. When any of them is replaced for repair, it must be locked with bond after the replacement. Silicon Bond: GYA 1011 DJM-750MK2...
  • Page 6 • Resister is all 10kΩ(3W) following method. • Both of LED is LTL17KRH5D • Step1: After the power is turned off,wait 2 minutes. • Step2: Connect the Register Jig and leave the unit as it is, for 10 seconds. DJM-750MK2...

  • Page 7: Specifications

    MID .............. –26 dB to +6 dB (1 kHz) LOW ............–26 dB to +6 dB (20 Hz) Microphone equalizer characteristic HI ............. –12 dB to +12 dB (10 kHz) LOW ............–12 dB to +12 dB (100 Hz) DJM-750MK2...

  • Page 8: Basic Items For Service

    NUMBER ”. License-key card for Service GGP1522 For activation of rekordbox dj GGP1523 For activation of rekordbox DVS Lubricants List Name Lubricants No. Remarks Sillcon Bond GYA1011 Used to do bond locking of C4638 and C4639 in the MAIN ASSY. DJM-750MK2...
  • Page 9 Master Level Meter Lch LED [–24dB] light-ON ECHO [–15dB] light-ON PING PONG [–9dB] light-ON SPIRAL [–6dB] light-ON REVERB [–3dB] light-ON TRANS [0dB] light-ON FLANGER [3dB] light-ON PITCH [6dB] light-ON ROLL [9dB] light-ON VINYL BRAKE [12dB] light-ON HELIX [15dB] light-ON DJM-750MK2...
  • Page 10 OLED DSP SDRAM SDRAM OLED UPDATE PORT UPDPORT OLED UPDATE PORT NG CH1 Level Meter PNL_MODE : [–24dB] light-ON A-PNL_MOSI : [–18dB] light-ON A-PNL_MISO : [–12dB] light-ON A-PNL_CLK : [–9dB] light-ON A-PNL_CTRL : [–6dB] light-ON A-PNL_INT : [–3dB] light-ON DJM-750MK2...

  • Page 11: Pcb Locations

    2..OLED ASSY DWX4010 1..AUDIO ASSY DWM2654 2..AINB ASSY DWX3999 2..MICB ASSY DWX4000 2..HPJK ASSY DWX4001 2..HPJM ASSY DWX4002 1..PNLA ASSY DWX3996 1..SUB ASSY DWM2655 2..CHFD ASSY DWX4003 2..BFXB ASSY DWX4004 2..MTRM ASSY DWX4005 2..PWSB ASSY DWX4006 2..HPVR ASSY DWX4007 DJM-750MK2...

  • Page 12: Block Diagram

    PWSB ASSY 4. BLOCK DIAGRAM RETURN (TS) JA5101 JA5301 (DWX4006) JA5501 JA5701 JA5901 JA5902 DKB1090- DKB1090- DKB1090- DKB1090- DKN1654- DKN1652- MICB ASSY OLED ASSY CN8901 (XLR/TRS) (DWX4000) (DWX4010) JA6501 KM200NA3 DKB1124- PHONO PHONO PHONO PHONO LINE LINE LINE LINE MTRM ASSY USBA ASSY MXS4057- (DWX4005)
  • Page 13 McASP2 LINE HPI 16bit PHONO TDM_OUT LINE TDM_IN IC6001 PHONO AK5558VN LINE MASTER1 IC3001 PHONO D810K013DZKB400 MASTER2 IC4001 LINE AK4458VN PHONO BOOTH IC5903 RETURN SEND AK5359ET IC5904 AK5358AET EMIF(B) HP_mini MICB ASSY HPJK ASSY IC3003 HPJM ASSY SDRAM(128M) A3V28S40JTP60 DJM-750MK2...
  • Page 14 CN5002 USBA ASSY MICB ASSY V+15A_IN AINB ASSY DWX3998 3998 DWX3999 3999 DWX4000 X4000 V- 15A_IN OLED ASSY CN6502 DWX4010 X4010 CN5001 CN5002 CN1601 CN1801 CN2502 CN1004 CN1005 CN7004 V+5R2D_VBUS V+12SW IC1205 IC1201 High side SW V+9LED V+9ADDA V+12A IC1408 MAIN ASSY PNLA ASSY V+5LED...
  • Page 15 V+12A_CONT [HIGH] V+12A_CONT V+15D_OLED_CONT [HIGH] V+15D_OLED_CONT [V+15A] ON [V+15OLED] ON [V+7R5HP] ON OLED_xRST [HIGH] OLED_RST VR, KDY Reading Reset canceled SHB_RST [HIGH] 1stBOOT Initialization Start (Normal mode) B-PNL_INT [HIGH] Handshake request Handshake response & Key notice Continued on next page DJM-750MK2...
  • Page 16 Handshake response (7777) Initialization Finish (Normal mode) Starting Normal mode MUTE cancel at 6 seconds after boot complete MUTE OFF command CPU_MUTE OFF [LOW] [CPU_MUTE] OFF 1 second after mute cancel USB A start command V5USB_EN[HIGH] HSSW ON DJM-750MK2...
  • Page 17 : CENTER MASTER LEVEL : CENTER CROSS FADER CURVE : CENTER BOOTH MONITOR : CENTER SEND/RETURN : 1/4" JACK PHONES VOLUME : CENTER RETURN TYPE : INSERT HP MONO/STEREO : STEREO SEND/RETURN LEVEL : CENTER HP MIXING : CENTER DJM-750MK2...

  • Page 18: Prior Confirmation

    IC7002. IC7002 1pin Check condition of the solder/replace parts. PANEL_UCOM PNLA ASSY If it does not improve in the above. There is a possibility of failure of the PANEL_UCOM failure (IC7001). Check condition of the solder/replace parts. DJM-750MK2...

  • Page 19: Abnormality Display

    IC2001 193pin communication failure USBB_UCOM to MAIN ASSY - USBB_UCOM(IC2001) to DSP(IC3001) HPI DSP communication communication line may have abnormality. (HPI) failure - Check condition of the solder/replace parts. - Still if symptoms do not improve, replace the PC board. DJM-750MK2...

  • Page 20: Audio Input

    Check the audio signals (other than Replace wires. CN1004 31pin sticking to LOW or HIGH) via relevant - In the case that audio signal exists signal route. =>There is a possibility of failure of the DSP(IC3001). waveform A13 Replace MAIN ASSY. DJM-750MK2...

  • Page 21: Audio Output

    . via relevant signal route. Check condition of the solder/replace parts. - In the case that audio signal exists. =>There is a possibility of failure of JACK and peripheral circuit . waveform M49 Check condition of the solder/replace parts. DJM-750MK2...

  • Page 22: Dvs

    PC,LINE,PHONO - Confirm that select switch is set to PC. Set correctly. Instructions select switch - Install the latest driver. - Confirm that DJM-750MK2 utility of PC CH level meter is set correctly. Power supply MAIN ASSY [Power supply] In the case of abnormality...

  • Page 23: Oled

    - [CROSS FADER signal] [7-1] same as In the case that signal is not outputted, wire may have disconnection. Replace parts. -If it does not improve in the above, resistances or PANEL_UCOM(IC7001) may have solder fault. Repair or replace parts. DJM-750MK2...

  • Page 24: Usba

    Parts failure MAIN ASSY [D±USB] [D±USB] IC2501 93/94pin Confirm that wave form is generated In the case of abnormality in the condition SEND/RETURN is ON. =>There is a possibility of failure of the MAIN ASSY . Replace MAIN ASSY. DJM-750MK2...

  • Page 25: Power Supply Diagnosis Information

     While the power supply is turned OFF, check the monitored voltage does not short out with GND.  While monitoring each monitored voltage, turn ON the power supply in this mode and check no error is generated. * A single power ON should be within 10 seconds. DJM-750MK2...

  • Page 26: Confirmation Of Each Interface Connection

    "Start" -> "Control panel" -> "System" -> "Device Manager" Added and displayed device - Universal Serial Bus controllers USB Composite Device - Sound, video, and game controllers DJM-750MK2 DJM-750MK2 Opening the device manager on the PC makes the connection work easier to check. [2. USB A connector] Confirm that USB communication is normal between the USB A terminals of this unit and the external devices.

  • Page 27: Service Mode

    Please power supply is turned ON while pressing (1) to (3) button at the same time. Holding down (1) to (3) button until display becomes the version confirmation mode . Test mode Exit Method Please power supply is turned OFF by press the POWER button. DJM-750MK2...
  • Page 28 Level meter LED confirmation mode [TAP] Test Mode 10 Volume A/D value confirmation mode [TAP] Test Mode 11 Fader A/D value confirmation mode [TAP] Test Mode 12 Device confirmation mode [TAP] Test Mode 13 OLED Iuminance confirmation mode [TAP] DJM-750MK2...
  • Page 29 Software name Displaying SYSTEM SYSTEM SH-B SH-A SH-BOOT BOOT PANEL PANEL PANEL-BOOT PANEL-B DSP Program DSP P DSP Data DSP D [BEAT DOWN] [BEAT UP] [BEAT DOWN] [BEAT UP] Firmware version of the SYSTEM is indicating that is 1.00. DJM-750MK2...
  • Page 30 If three time retries fail to acquire A/D values, acquisition error is determined. • A/D values that are set in this mode become effective immediately after saving. • Should an error occur, setting must be started again without changing the mode. DJM-750MK2...
  • Page 31 Outline LED and display will be all lighting. Display mode title ALL SET * This is displayed for about 1 second at the start of mode. Operation [TAP] : Mode change (to next mode) Lighting points during all lighting DJM-750MK2...
  • Page 32 UTILITY WAKE UP LED UTILITY FX FREQUENCY LOW FX FREQUENCY LOW LED FREQ L FX FREQUENCY MID FX FREQUENCY MID LED FREQ M FX FREQUENCY HI FX FREQUENCY HI LED FREQ H EFFECT ON/OFF EFFECT ON/OFF LED EFX ON DJM-750MK2...
  • Page 33 Mater Level Meter Rch LED * SW left is assumed 1 and right is assumed 11. TIME knob Operation range Initial value : 10 12dB Maximum value : 100 15dB Minimum value : -100 Minimum value Initial value Maximum value Counterclockwise Clockwise DJM-750MK2...
  • Page 34 Correlation diagram of the operation switch and lighting LED DJM-750MK2...
  • Page 35 "HI" : Full Illuminate CH4 COLOR CH4 Level Meter LED "LOW" : Lights off "HI" : Full Illuminate SND/RTN LEVEL Master Level Meter Lch LED "MIN" : Lights off "MAX" : Full Illuminate * Refer to the next page for grouping details DJM-750MK2...
  • Page 36 Grouping details : Group 1 : Group 4 : Group 2 : Group 5 : Group 3 DJM-750MK2...
  • Page 37 Operation button Lighting meter CH1 CUE CH1 Level Meter CH2 CUE CH2 Level Meter CH3 CUE CH3 Level Meter CH4 CUE CH4 Level Meter MASTER CUE Master Level Meter Lch LED FREQUENCY LOW Master Level Meter Rch LED/CLIP LED DJM-750MK2...
  • Page 38 NG display LED PNL_MODE CH1 Level Meter -24dB LED A-PNL_MOSI CH1 Level Meter -18dB LED A-PNL_MISO CH1 Level Meter -12dB LED A-PNL_CLK CH1 Level Meter -9dB LED A-PNL_CTRL CH1 Level Meter -6dB LED A-PNL_INT CH1 Level Meter -3dB LED DJM-750MK2...

  • Page 39: About The Device

    IC3001 MAIN ASSY DSP SDRAM RAM for DSP (Work) A3V28S40JTP-60 IC3003 MAIN ASSY PANEL UCOM Main, LED, OLED, KEY and VR control DYW**** *1 IC7001 PNLA ASSY *1 : [****] of DYW**** changes each time the firmware is updated. DJM-750MK2...

  • Page 40: Disassembly

    Slide the Panel (DNK6689) to the right, and then remove it toward the near side. Remove the two screws (BBZ30P060FTC) and two Washers (WB30FTC). Note on assembling ∗2: Refer to the “[3-3] Attach the Control Panel Section to the Chassis”. DJM-750MK2...
  • Page 41 Saddle (Pls). Shielded CONN-CABLE Remove the four screws (BBZ30P060FTC) and then remove the Shield Plate (DNF2023). Shield Plate Note on assembling ∗6: Attach the screws in the order as shown by orange numbers. Locking Mini Clamp Edge Saddle (Pls) Diagnosis DJM-750MK2...
  • Page 42 (DEC2920). Remove the six screws. (PPZ30P080FTB) Remove the five screws. (BPZ30P080FTB) Remove the Screw (M3x5). (DBA1340) Note: When MAIN ASSY is not removed, • Rear view screws, nuts and washers of blue numbers need not to be removed. DJM-750MK2...
  • Page 43 (Refer to the “[3-2] Shield Plate (DNF2023), Stay (DNF2024)” ) Shield Plate (DNF2022) Remove the four screws (BBZ30P060FTC), and then remove the Shield Plate (DNF2022). Note on assembling Front ∗12: Attach the screws in the order as shown by blue numbers. DJM-750MK2...
  • Page 44 ∗19: Attach the screws in the order as shown by blue numbers. PWSB ASSY Release the tip of the PCB Holder (PNW1706), and then remove the PWSB ASSY while drawing the Power Knob from the Power Knob Guard. Power Knob Remove the Power Knob. DJM-750MK2...
  • Page 45 Remove the four Knobs. Remove the five Slider Knobs. Note: Each Slider Knob has a lock mechanism. (Refer to the next page) Remove the seven screws. (DBA1451) Note on assembling ∗23: Attach the screws in the order as shown by blue numbers. DJM-750MK2...
  • Page 46 Control Panel is damaged, replace it with new ones. CN7601 ∗27 Fader Packing Control Panel (Back surface) CHFD ASSY FFC (DDD1808) PNLA ASSY Disconnect the connector, and remove the FFC (DDD1808) by drawing it out from the slit of the CHFD ASSY. DJM-750MK2...
  • Page 47 Remove the Stay (DNF2026) from the BFXB CN7701 ASSY. Remove the Button (DAC3141) and SW FFC (DDD1809) Packing (Ef). SW Packing (Ef) Button FFC (DDD1807) Disconnect the connector. Remove the Cap /MIC from the HPVR ASSY. HPVR ASSY CN8101 Cap /MIC DJM-750MK2...
  • Page 48 Remove the four Flange Nut M9s. Holder (DNK6692) Note on assembling PNLA ASSY ∗31: Make sure not to invert CN7004 OLED ASSY the mounting locations for the Button (DAC3249 Holder /LED and DAC3251). CN7008 CN7006 CN7012 CN7003 ∗31 Button (DAC3249) CN7001 Button (DAC3251) DJM-750MK2...
  • Page 49 7 6 5 ASSY, MICB ASSY must be attached in the Front order as shown by orange numbers. AINB ASSY Stay (DNF2024) Note: Before the attachment of the orange screws , attach the screws on the Rear Panel side. DJM-750MK2...
  • Page 50 Barrier (DEC3745) Bend at the 2 mm distance into the slit of Barrier from the reinforcement board. (DEC3735). FFC (DDD1806) Connect the FFC to the MAIN ASSY’s MAIN ASSY Connector with the ends which have longer reinforcement board. CN1003 DJM-750MK2...
  • Page 51 CN6601 CN8901 CN4601 (blue) Connector ASSY MAIN ASSY CN4602 Holder (PF03PP-B12) Shielded CONN-CABLE Shielded CONN-CABLE Front Front Edge Saddle (Pls) [3-5] Edge Saddle (Pls) It has a direction with front and back sides. Shield Plate hook facing upward (DNF2023) DJM-750MK2...
  • Page 52 C4638 and C4639 in the MAIN ASSY are locked with bond to prevent solder cracks caused by fall or vibration. When any of them is replaced for repair, it must be locked with bond after the replacement. Silicon Bond Silicon Bond used: GYA1011 DJM-750MK2...

  • Page 53: Each Setting And Adjustment

    (Refer to 6.1 TEST MODE [2. Cross fader setting mode "CFDR SET"]) • Cross Fader ASSY • Acquire and save the maximum and minimum A/D value of [Cross Fader]. (Refer to 6.1 TEST MODE [2. Cross fader setting mode "CFDR SET"]) DJM-750MK2...

  • Page 54: Updating Of The Firmware

    OFF and pull out the USB memory for update. Then, update is finished. If update is not started, retry from the firmware down load. If you still cannot update, it is considered the cause of USB memory. Please try another USB memory. DJM-750MK2...

  • Page 55: Method Of Writing Serial Number

    PC.  Connect the USB B terminal of unit and PC using the 750MK2 USB cable.  Keep pressing the keys [NOISE] + [FILTER] + [CH1 CUE] and power supply is turned ON of DJM-750MK2. DJM-750MK2...

  • Page 56: Method Of Dvs Connection Confirmation

    Please refer to following details setup in the setting items. Setting items Setup material items Enables DVS function Connects CDJs/DECK1 to MIXER CH1 No setting because it is not connecting using a turn table Settings, play rekordbox dvs specific control signal at the CDJ. DJM-750MK2...
  • Page 57 [Environment set] of the rekordbox (PERFORMANCE mode) -> Conduct the following settings using [DVS] . [1] DVS function enable/disable [2] Rooting set [3] Control signal set 4.1 DVS function enable/disable DVS function enable Checkmark the [DVS function enable] to switch each DECK to DVS mode. DJM-750MK2...

  • Page 58: Items For Which User Setting Are Available

    ADVANCED NORMAL –24 dB –18 dB –12 dB –6 dB MIDI OLED BRIGHTNESS BUTTON TYPE 9 10 11 12 13 14 15 16 TOGGLE TRIGGER PC UTILITY AUTO STANDBY Factory Reset Do not perform it before writing in user setting. DJM-750MK2...

  • Page 59: Exploded Views And Parts List

    Screws adjacent to mark on product are used for disassembly. For the applying amount of lubricants or glue, follow the instructions in this manual. (In the case of no amount instructions, apply as you think it appropriate.) 9.1 PACKING SECTION DJM-750MK2...
  • Page 60 LSYXJ, UXJCB and XJCN are constructed the same except for the following: Mark Symbol and Description LSYXJ UXJCB XJCN Power Cord ADG1244 DDG1108 DDG1114 Leaflet DRH1431 DRH1431 DRH1432 Operating Instructions (Quick Start Guide) DRH1433 DRH1434 DRH1436 Warranty DRY1270 Not used Not used Packing Case DHG3572 DHG3573 DHG3575 DJM-750MK2...

  • Page 61: Exterior Section

    9.2 EXTERIOR SECTION ∗ Accessory of VR ∗ ∗ Refer to “9.4 CONTROL PANEL SECTION” ∗ ∗ ∗ ∗ PNLA ASSY CN7008 PNLA ASSY CN7006 MAIN ASSY CN2502 Refer to “9.3 CHASSIS SECTION” DJM-750MK2...
  • Page 62 NSP 34 Label See contrast table (2) (2) CONTRAST TABLE LSYXJ, UXJCB and XJCN are constructed the same except for the following: Mark Symbol and Description LSYXJ UXJCB XJCN Name Label DAL1349 DAL1349 DAL1351 Label Not used DRW1975 Not used DJM-750MK2...

  • Page 63: Chassis Section

    When any of them is replaced for repair, it must be locked with bond after the replacement. Silicon Bond used: GYA1011 C4638 C4639 USBA ASSY CN1601 Silicon Bond ∗ Glue Silicon Bond : GYA1011 Front DJM-750MK2...
  • Page 64 14 Shield Plate DNF2022 35 Washer DEC2920 15 Stay DNF2024 36 Screw PPZ30P080FTB 16 Stopper DNH3295 37 Screw BPZ30P080FTB NSP 17 PCB Stay (Fe) VNE2489 38 Screw (M3x5) DBA1340 NSP 18 Spacer AEB7092 19 Spacer AEC1065 20 Sheet DEC3621 DJM-750MK2...

  • Page 65: Control Panel Section

    9.4 CONTROL PANEL SECTION Double side tape Accessory of VR A ´ A ´ MAIN ASSY CN1002 MAIN ASSY CN1003 DJM-750MK2...
  • Page 66 53 Escutcheon Service ASSY DEA1072 22 Rivet (Plastic) RBM-003 54 Escutcheon DNK6693 23 Packing DEC3777 55 Lens DNK6610 24 Packing DEC3781 25 Button DAC3250 26 Button DAC3249 27 Button DAC3251 28 Button DAC3257 29 Button DAC3282 30 Button DAC3141 DJM-750MK2...
  • Page 67 PWSB ASSY RETURN 10. SCHEMATIC DIAGRAM (TS) (DWX4006) JA5101 JA5301 JA5501 JA5701 JA5901 JA5902 DKB1090- DKB1090- DKB1090- DKB1090- DKN1654- DKN1652- MICB ASSY OLED ASSY CN8901 (XLR/TRS) (DWX4000) (DWX4010) JA6501 KM200NA3 DKB1124- PHONO PHONO PHONO PHONO LINE LINE LINE LINE MTRM ASSY USBA ASSY MXS4057- (DWX4005)
  • Page 68 CONNECT BLOCK 1/11 MAIN ASSY (DWX3997) The check point for service. (Legend silk indication on the PCB.) Regulator 12V=>5.0V(EVER) POWER DOWN DETECTION CIRCUIT NOTES is STBY V+12E RS1/16S****J V+12SW V+12SW_OPA V+12A V+12E V+5E RS1/10S****J V+12SW V+12E ACOFF_DET RS1/16S****D CN1001 RS1/10S****D DKN1666-A RS1/16S****F V+12SW_OPA...
  • Page 69 2/11 MAIN ASSY (DWX3997) POWER(DIGITAL) BLOCK The check point for service. (Legend silk indication on the PCB.) VOLTAGE DETECTION CIRCUIT V+12SW DC/DC Converter 12V=>3.3V(D) V+3R3D V+3R3D V+3R3OLED V+3R3D V3R3D_CONT L1204 10:7G;1D;14:5G 1/11, 3/11 CTH1561-A V+1R25D V+5A V+3R3D V+5A V+5A V+3R3D V+15A V+5D FAULT_DET...
  • Page 70 3/11 POWER(AUDIO) BLOCK MAIN ASSY (DWX3997) The check point for service. (Legend silk indication on the PCB.) DC/DC Converter 12V=> 7.5V(HP) V+12SW_OPA V+2R5REF_HP for DAC,ADC POWER IC1403 R1425 BD9851EFV Regulator 9V=>5V(A) ADC/DAC(AVDD) Regulator 12V=>9V(A) SEL1 R1409 R1410 R1423 C1433 C1443 R1432 R1434 D1416...
  • Page 71 USBB UCOM 4/11 MAIN ASSY (DWX3997) V+3R3D The check point for service. (Legend silk indication on the PCB.) V+3R3D CN2001 IC2005 TC7SZU04FUS2 IC2007 V+3R3D V+3R3D 5/11 UB_JTAG_ASEMD GNDD IN_A SH_ASEMD R2129 USBA_CLK(48MHz) SH_TCK OUT_Y OUTY 25:12D UB_PNL_SPI SH_TRST 10:11E GNDD R2122 TC7SZ08FUS2 R2130...
  • Page 72 5/11 MAIN ASSY (DWX3997) USBA UCOM V+3R3D CN2501 The check point for service. V+3R3D (Legend silk indication on the PCB.) UA_PNL_SPI V+3R3D 10:11E U A _ J T A G _ A S E M D SH_ASEMD 1/11 SH_TCK IC Distinction SH_TRST (LOW:UA HI:UB) JTAG...
  • Page 73 DSP (1/2) 6/11 MAIN ASSY (DWX3997) The check point for service. (Legend silk indication on the PCB.) IC3001 SDRAM 128M V+3R3D D810K013DZKB400 V+3R3D B 1 6 D V D D 1 V s s 1 IC3001 D V D D 2 V s s 2 D810K013DZKB400 D V D D 3...
  • Page 74 7/11 MAIN ASSY (DWX3997) DSP (2/2) V+3R3D_CLK V+3R3D_CLK The check point for service. C 3 5 1 6 C 3 5 1 2 (Legend silk indication on the PCB.) C 3 5 1 8 C 3 5 1 4 V+3R3D_CLK 0 .
  • Page 75 8/11 MAIN ASSY (DWX3997) Multi-DAC Chip Address:01 The check point for service. (Legend silk indication on the PCB.) V+5A_REF V+3R3A R 4 0 0 5 1.8V GNDA x R S T _ 4 4 5 8 35:12G BOOTH_R- 44:1G 10/11 M C L K _ 4 4 5 8 BOOTH_R+ 35:7C...
  • Page 76 9/11 MAIN ASSY (DWX3997) MASTER1/MASTER2 V+15A_O C 4 2 1 9 C 4 2 1 3 DNF1789-A CANON SHIELD MASTER1 L V+15A_O 0 . 1 u / 2 5 R 4 2 6 1 GNDA_F GNDA JA4201 CANON SHIELD 1 0 k C 4 2 3 5 DKB1093-A 0 .
  • Page 77 10/11 BOOTH MAIN ASSY (DWX3997) V+15A_O C 4 4 1 3 V+15A_O V+15A_O 0 . 1 u / 2 5 BOOTH Lch GNDA C 4 4 2 1 C 4 4 3 3 C 4 4 3 4 0 . 1 u / 2 5 1 0 0 u / 1 6 1 0 0 u / 1 6 JA4401...
  • Page 78 11/11 MAIN ASSY (DWX3997) SEND BLOCK DNF1875-A PHONE SHIELD V+15A_O C 4 6 1 5 SEND_L (SEN OUT) R 4 6 0 1 R 4 6 1 7 0 . 1 u / 2 5 S E N D _ L - JA4601 40:8D 6 .
  • Page 79 PNLA ASSY (DWX3996) CN8101 CN7601 ANA_P_CON discharge V K N 1 2 3 7 - A CN7701 V K N 1 2 4 8 - A High V+15OLED V+15OLED1 V+3R3D_REF_L Q 7 0 6 9 R 7 2 4 6 L S A R 5 2 3 U B V K N 1 2 5 0 - A V+3R3D_REF_L...
  • Page 80 PNLA ASSY (DWX3996) 1/3, 3/3 5V_LED_CIRCUIT V+5LED V+5LED V+5LED V+9LED V+9LED V+5LED 9V_LED_CIRCUIT V+9LED V+5LED V+9LED V+5LED LED_GRID1 V+5LED LED_GRID2 LED_GRID7 LED_GRID0 LED_GRID3 LED_GRID4 R 7 2 3 9 GNDD_LED R 7 1 1 5 4 . 7 k GNDD_LED LED_GRID5 4 .
  • Page 81 PNLA ASSY (DWX3996) 1/3, 2/3 IN3 SELECT IN1 SELECT VR_SEL_C VR_SEL_B VR_SEL_A AD_0 VOLUME SELECT V+3R3D_REF_L C 7 0 6 7 0 . 1 u / 1 6 CH1 TRIM CH2 TRIM CH4 TRIM V C C CH3 TRIM MAS_LEVEL K E Y _ S E G 0 _ P N L V+3R3D_REF_L V+3R3D_REF_L...
  • Page 82 BOARD IF AINB ASSY (DWX3999) V+3R3D_CLK IC5002 TC7SZ08FUS2 24.576MHz MCLK For SW OPAMP R 5 0 2 8 I N B 60:3D R 5 0 1 7 M C L K _ C H 1 - 4 V-15A_IN V+15A_IN I N A V-15A V+15A GNDD...
  • Page 83 CH1_INPUT AINB ASSY (DWX3999) V+15A_IN C 5 1 2 5 V+15A_IN A C E 7 1 2 8 - A C 5 1 3 8 0.33u/50 0 . 1 u / 2 5 C 5 1 1 9 P1OUT_L GNDA_PH1 I C 5 1 0 4 GNDA_PH1 I C 5 1 0 1...
  • Page 84 CH2_INPUT AINB ASSY (DWX3999) V+15A_IN C 5 3 2 5 V+15A_IN A C E 7 1 2 8 - A C 5 3 3 8 0.33u/50 0 . 1 u / 2 5 C 5 3 1 9 P2OUT_L GNDA_PH2 GNDA_PH2 I C 5 3 0 4 I C 5 3 0 1...
  • Page 85 CH3_INPUT V+15A_IN AINB ASSY (DWX3999) C 5 5 2 5 V+15A_IN A C E 7 1 2 8 - A C 5 5 3 8 0.33u/50 0 . 1 u / 2 5 PHONO C 5 5 1 9 GNDA_PH3 P3OUT_L GNDA_PH3 I C 5 5 0 4...
  • Page 86 CH4_INPUT V+15A_IN AINB ASSY (DWX3999) C 5 7 2 5 V+15A_IN A C E 7 1 2 8 - A C 5 7 3 8 0.33u/50 0 . 1 u / 2 5 C 5 7 1 9 PHONO GNDA_PH4 P4OUT_L I C 5 7 0 4 GNDA_PH4...
  • Page 87 RETURN/MIC ADC AINB ASSY (DWX3999) V+15A_IN C 5 9 0 8 C 5 9 0 5 4 7 u / 2 5 4 7 u / 2 5 GNDA_RTN GNDA_RTN V-15A_IN V+15A_IN V+15A_IN V+5A RETURN C 5 9 2 7 C 5 9 0 6 RTN_L 0 .
  • Page 88 CH1- CH4 ADC AINB ASSY (DWX3999) Chip Address:00 (IN) C H 3 _ L + 55:9E (IN) C H 3 _ L - 55:9E C H 2 _ R + 53:9H C H 2 _ R - V+5A 53:9G R 6 0 1 1 R 6 0 1 9 (IN) C H 2 _ L -...
  • Page 89 USBA ASSY (DWX3998) MTRM ASSY (DWX4005) USBA MIC TRIM CN7901 MIC LEVEL CN1601 A K M 1 2 8 1 - A MIC_TRIM_IN USB CONNECTOR (MIC I) GNDD_USBC (A-TYPE) GNDD_USBC Rating (MIC I) V+5R2D_VBUS 30V/ 2.5A V+5R2D_VBUS C 1 6 0 2 10u/10 5/11 V+5R2D_VBUS...
  • Page 90 HPJK HPJK ASSY (DWX4001) HPJM HPJM ASSY (DWX4002) C 6 7 0 1 C 6 6 0 1 0.01u/50 A C E 7 1 1 3 - A 0.01u/50 A C E 7 1 1 3 - A C 6 7 0 2 C 6 6 0 2 0.01u/50 A C E 7 1 1 3 - A...
  • Page 91 OLED ASSY (DWX4010) CHFD ASSY (DWX4003) OLED CHFD CH1 FADER V+3R3D_REF_L CH1_FADER V R 7 6 0 4 D C V 1 0 2 0 - A GNDD_REF_L2 V+3R3D_REF_L CN7601 CH1_A/B CH3_A/B CH_CURVE1/3 V K N 1 2 4 8 - A CH2 FADER S7601 S7616...
  • Page 92 BFXB PWSB PWSB ASSY (DWX4006) 0 . 0 1 u / 2 5 C 8 0 0 1 BFXB ASSY (DWX4004) 1/11 GNDD PWR_SW CN1006 1 0 0 GNDD R 8 0 0 1 CH SELECTOR V+3R3D_REF_L C 7 7 1 1 BEAT EFX SELECT 0 .
  • Page 93 SW POWER SUPPLY SW POWER SUPPLY SW POWER SUPPLY (DWR1548) AC POWER CORD 1/11 CN1001 CRFD CRFD ASSY (DWX3258) IC4001 EM-3242 V+3R3REF CN4001 A K M 1 2 7 4 - A T S T B T E S T A V S S V D D V+3R3REF...
  • Page 94 The indicated voltage values of the oscilloscope in this section are reference values and may vary, depending on the settings of the oscilloscopes and probes. Numbers surrounded by red square indicate denote numbers for the measurement points in the Schematic diagrams and PCB diagrams. DJM-750MK2...
  • Page 95 MAIN ASSY USBB-CLK USBA-CLK DSP-PLL xRST_4458(RESET CANSEL) MCLK_4458 BICK_4458 LRCK_4458 ADAT_HP ADAT_S ADAT_M ADAT_B B_ADDA_SCL(T), B_ADDA_SDA(L) MASTER_x-(T), MASTER_x+(L) MASTER_HOT(T), MASTER_COLD(L) MASTER1OUT_COLD(T), MASTER1OUT_HOT(L) DJM-750MK2...
  • Page 96 MASTER2OUT BOOTH_x-(T), BOOTH_x+(L) BOOTH_HOT(T), BOOTH_COLD(L) BOOTHOUT_COLD(T), BOOTHOUT_HOT(L) SEND_x-(T), SEND_x+(L) SENDOUT HP_x+(T), HP_x-(L) IC4602OUT HP_OUT_x MUTE_OUT(MUTE CANSEL) DJM-750MK2...
  • Page 97 PNLA ASSY M16_CLK SHB_M16_MOSI SHB_M16_CLK SHB_M16_MISO SHB_M16_CTRL SHB_M16_INT SHB_RST SHA_M16_MISO SHA_M16_MOSI SHA_M16_CLK SHA_M16_CTRL SHA_M16_INT OLED_xRST OLED_ADDR OLED_MOSI DJM-750MK2...
  • Page 98 OLED_xCS OLED_SCL AINB ASSY LINE SELECT PHONO SELECT MCLK BICK LRCK xRST(RESET CANSEL) P*OUT_x CH*OUT_x CH*_x-(T), CH*_x+(L) VBIAS_CH*_x RTN_xM RTN_x DJM-750MK2...
  • Page 99 ADAT_RTN RTN_IN MIC_IN ADAT_MIC B_ADDA_SCL(T), B_ADDA_SDA(L) ADAT_CH* MICB ASSY MIC_TRIM_IN MIC_OUT DJM-750MK2...
  • Page 100 11. PCB CONNECTION DIAGRAM SIDE A CN7006 CN7008 SIDE A MAIN ASSY CN1013 CN1002 R4659 M35 M34 CN1005 CN1004 CN5002 CN5001 CN2502 CN1006 (DNP2866-A) CN1601 CN8901...
  • Page 101 SIDE B SIDE B MAIN ASSY CN2502 CN1006 CN1005 CN1004 C4218 R4248 R4238 R4247 C1065 C1066 R4237 C1465 R4246 IC1407 R4236 D1424 0 1 2 3 0 1 2 3 4 5 6 7 8 9 D1420 D1422 R4245 D1421 C1466 C1468 R4235...
  • Page 102 SIDE A SIDE A PNLA ASSY S7021 1/4 JACK RTN_IN_SELECT S7003 S7015 S7016 VR7011 S7002 INPUT SELECT INPUT SELECT INPUT SELECT MASTER LEVEL INPUT SELECT S7022 CH1 TRIM CH2 TRIM CH3 TRIM CH4 TRIM VR7001 VR7006 VR7013 VR7020 INSERT RETURN TYPE D7061 D7039 D7050...
  • Page 103 SIDE B SIDE B PNLA ASSY CN7008 CN7006 CN7012 CN7003 CN7001 (DNP2869-A)
  • Page 104 SIDE A SIDE A AINB ASSY JA5101 JA5301 JA5501 JA5701 VA5104 VA5304 VA5504 VA5704 VA5305 VA5505 VA5705 C5307 C5507 C5308 C5107 C5508 C5708 C5707 VA5105 C5110 C5310 C5510 C5710 C5108 C5511 C5106 R5112 C5311 C5306 C5506 C5711 C5706 R5312 R5512 R5712 R5108 C5111...
  • Page 105 SIDE B SIDE B AINB ASSY CN5001 CN5002 (DNP2867-A)
  • Page 106 SIDE A SIDE A HPJK ASSY OLED ASSY USBA ASSY C6604 CONTACT SIDE HPJK DWX4001 DWX4010- OLED [[ G ]] [[ G ]] JA6601 C6603 B30C5A3/C7 VA6601 A30C5/C7 WHITE MANUAL CN6601 SOLDER 2.USBC_DP etc.GNDF_USBC 3.USBC_DM DWX3998- 6-8.V+5R2D_VBUS USBA CN1601 C1806 CN1802 CN1801 VA6603...
  • Page 107 SIDE B SIDE B MICB ASSY CN6502 CN6501 MTRM ASSY CN7901 CN7901 (DNP2867-A) MTRM DWX4005- HPJM ASSY J7901 GND_MIC [[ G ]] CN6701 (DNP2868-A) (DNP2867-A) OLED ASSY USBA ASSY HPJK ASSY CN1601 CN1801 CN6601 (DNP2866-A) (DNP2866-A) (DNP2867-A) D E F G H K D E F G H K...
  • Page 108 SIDE A SIDE A CRFD ASSY CHFD ASSY CRFD ASSY because of only ASSY replacement, PCB CONNECTION DIAGRAM is not mentioned. CN7602 CN7602 PWSB ASSY CRF_CURVE1/3 S7617 J7626 CH4_A/B CH3_A/B CH2_A/B CH1_A/B J7627 S7614 S7613 S7612 S7601 THRU THRU THRU THRU J7609 CH_CURVE1/3...
  • Page 109 SIDE B SIDE B BFXB ASSY HPVR ASSY CN7701 CN8101 CN7701 GNDD J7706 C7701 J7707 D7709 D7712 C7707 D7711 D7710 R7742 R7743 R7701 R7746 R7747 R7705 R7745 R7744 R7704 R7748 R7702 R7712 R7713 R7741 R7715 C7711 R7714 R7749 J7701 C7705 D7724 J7703 C7703...
  • Page 110 SIDE A SIDE A SW POWER SUPPLY AC POWER CORD (MPN6309) SIDE B SIDE B SW POWER SUPPLY (MPN6309)
  • Page 111 1404 Resistor Built-IN TR LTC014EEB 1205 IC TPS2557DRB 1206 IC BD2226G 1405 Resistor Built-IN TR LTC014EEB 1207 Regulator IC NJM2872BF33 1407 Transistor LTC114EUB 1408 Resistor Built-IN TR LTA114EUB 1208,1408 Regulator IC NJM78M09DL1A 1410 FET RTQ045N03 1401 DC/DC CONV IC NJW4132U2 DJM-750MK2...
  • Page 112 QTL1013 1230 RS1/16SS4302D 2504 Choke Coil ATH7099 1231 RS1/16SS101J 3001 SMD Ferrite Beads CTF1823 1232 RS1/10SR472J 2001 Resonator CSS1760 1233 RS1/10SR331J 2002 Crystal Resonator CSS1840 1235,1237,1238 RS1/16SS332J 3502 Crystal Oscillator ASS7102 1236 RS1/16SS822J 3001 EMI Filter DTL1106 1239,1240,1250,1251 RS1/16SS473J DJM-750MK2...
  • Page 113 RS1/16SS560J 3010,3011,3012,3013,3015 RS1/16SS103J 2024,2033 RS1/16SS220J 3016,3017,3018,3019 RS1/16SS103J 3020,3021,3022,3023,3024 RS1/16SS680J 2032 RS1/16SS470J 2035 RS1/16SS221J 3025,3026,3027,3028,3029 RS1/16SS680J 2038,2039,2040,2041,2042 RS1/16SS560J 3030,3031,3032,3033,3034 RS1/16SS680J 2043,2044,2046,2051,2052 RS1/16SS560J 3035 RS1/16SS680J 2047,2049,2050,2053,2057 RS1/16SS0R0J 3036,3037 RS1/16SS220J 3038,3039,3040,3041,3042 RS1/16SS330J 2048,2054,2056,2059,2064 RS1/16SS103J 2055,2060 RS1/16SS101J 3043,3044,3045,3046,3047 RS1/16SS330J 2058,2073,2074 RS1/16SS0R0J 3048,3049,3050,3051,3052 RS1/16SS330J DJM-750MK2...
  • Page 114 RS1/10SR1002D 4265,4266,4267,4268,4269 RS1/10SR5601D 1019 CEVW470M35 4270,4271,4272 RS1/10SR5601D 1021 CKSQYB225K10 4273,4274 RS1/10SR2202D 1032,1035,1038,1041,1044 CEVW470M16 1034,1037,1040,1043,1046 CKSSYB102K50 4276 RS1/10SR1002D 1036,1039,1042,1045,1048 CKSRYB104K16 4277,4278,4279,4280,4281 RS1/10SR6801D 4282,4283,4284 RS1/10SR6801D 1047 CEVW470M16 4285,4286,4287,4288 DCN1200 1049 CKSSYB102K50 4289,4291 RS1/10SR6800D 1050,1051,1052,1053,1054 CKSSYB103K16 1055,1056,1057,1058,1059 CKSSYB103K16 4293,4294,4295,4296 RS1/10SR2201D 1060,1061,1062 CKSSYB103K16 DJM-750MK2...
  • Page 115 CKSRYB104K25 2570,2571,2583,2584,2588 CCG1192 2572 CCSSCH101J50 1478 CKSQYB334K50 1479,1481 CKSRYB102K50 2581,2582,3004,3005,3007 CKSSYB103K16 1480 CCSRCH101J50 2587,2590,2595,3001,3006 CKSSYB104K10 1483,1484 CKSRYB104K16 2589 CCG1192 1487 CCG1318 2591,3012,3014,3016,3018 CKSSYB102K50 2594 CKSSYB222K50 1496,1497 CCSRCH102J50 1601,1801 CKSSYB103K16 3002 CCH1565 1602 CCG1192 3008 CKSSYB471K50 1603,2016,2021,2022 CKSSYB102K50 3009,3010,3011,3013,3015 CKSSYB103K16 DJM-750MK2...
  • Page 116 SLI-343YYW(TUV) 4435,4436,4437,4438 ACE7119 7004,7027,7028 LED LTL17KRH5D 4439 CKSRYB102K50 7006,7008,7009 LED(Yellow) SLI-343YYW(TUV) 4440 CKSQYB104K50 7010,7011,7012 LED(Yellow) SLI-343YYW(TUV) 4601,4602,4603,4604 CCSRCH271J50 4605,4614 CCH1565 7013 LED(Yellow) SLI-343YYW(TUV) 7014,7015,7016,7017 Blue LED SLR343BD2T(NP) 4606,4607,4608,4609 CCSRCH151J50 7018,7019,7020 LED (White) SLR343WBD2PT(Z1) 4610,4611,4612,4613 CCSRCH121J50 7021 LED (White) SLR343WBD2PT(Z1) DJM-750MK2...
  • Page 117 7021,7022,7023 Rotary VR DCS1116 7225 RS1/10SR103J 7024,7025 Rotary VR DCS1116 7230,7231,7232,7233,7234 RS1/10SR223J 7001 6P Connector VKN1237 7235,7236,7237,7270 RS1/10SR223J 7003 19P Connector VKN1250 7239 RS1/10SR472J 7004 11P Connector VKN1242 7240,7246,7276,7277,7278 RS1/10SR0R0J 7006 29P Connector VKN1260 7244 RS1/10SR104J 7008 24P Connector VKN1255 DJM-750MK2...
  • Page 118 HPJK ASSY HPJM ASSY 5701,5702,5903 Varistors EZJZ1V270RM 6501,6502,6503 Varistors EZJZ1V270RM 6603,6703 Varistors EZJZ1V270RM 5001 FFC Connector VKN1811 5002 L-Plug(10P) KM200NA10L Unit Number: DWM2654 5003 13P Connector 13P-1.25FJ Unit Name: AUDIO ASSY 6501 BtoB 11PIN Plug AKM7101 6502 13P Connector 13R-1.25FJ DJM-750MK2...
  • Page 119 RS1/10SR1502D 5315,5316 RN1/16SE1201D 5741,5742 RS1/10SR103J 5317,5319 RS1/10SR470J 5744,5745,5746,5747,5748 RS1/10SR4701D 5318,5320 RN1/16SE6800D 5749,5750,5751 RS1/10SR4701D 5321,5322,5323,5324 RN1/16SE2201D 5752,5754,5756,5758 RS1/10SR2200D 5325,5326 RS1/10SR7502D 5753,5755,5757,5759 RS1/10SR1801D 5327,5328 RS1/10SR6801D 5760,5761,5762,5763 RS1/10SR2401D 5329,5330 RS1/10SR7500D 5764,5767,5768,5771 RS1/10SR1001D 5333,5334 RS1/10SR0R0J 5765,5766,5769,5770 RS1/10SR1501D 5335,5336 RS1/10SR7501D 5776,5777 RS1/16SS1002D 5337,5339 RS1/10SR1502D DJM-750MK2...
  • Page 120 CCSRCH101J50 5123,5126 ACH1480 5903,5904,5919 CCSRCH102J50 5124,5125 ACE7128 5905,5908,5916,5923,5930 CEAT470M25 5127,5128 ACE7100 5906,5907,5927,5928,5944 CKSRYB104K25 5129,5136 CEHAT221M16 5909,5910,5929 CEAT220M50 5133,5134,5138,5141,5142 CKSRYB104K25 5914,5915,5933,5934 CKSRYB104K16 5143,5144 CKSRYB104K25 5917,5937 DCH1201 5148,5311,5312 CCSRCH101J50 5922,5924,5935,5936,6004 CCSSCH102J50 5149 CKSSYB104K16 5925 CKSRYB102K50 5150 CKSSYB103K16 5926 CKSQYB104K50 5151 CCG1192 DJM-750MK2...
  • Page 121 7644,7645 Rectifier Diode DA2J101 7646,7709 Rectifier Diode DA2J101 7601,7701,7707,7711,8103 CKSRYB104K16 7602 CKSQYB106K6R3 7705,7706 Blue LED SLR343BD2T(NP) 7610,7614,7615,7616,7617 CKSRYB104K25 7710,7711 Rectifier Diode DA2J101 7702,8102 CEJQ470M16 7712,7722 Rectifier Diode DA2J101 8001 CKSRYB103K25 7723,7724 Rectifier Diode DA2J101 8120 Rectifier Diode DA2J101 8104,8105 CKSRYB104K16 DJM-750MK2...
  • Page 122 Mark No. Description Part No. SW POWER SUPPLY SW POWER SUPPLY because of only PCB replacement, parts are not serviced. CRFD ASSY CRFD ASSY because of only ASSY replacement, parts are not serviced. DJM-750MK2...

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