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Pioneer DJM-750-K Service Manual
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Pioneer DJM-750-K Service Manual

Pioneer DJM-750-K Service Manual

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DJ MIXER
DJM-750-K
DJM-750-S
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model
DJM-750-K, DJM-750-S
SYXJ8
DJM-750-K, DJM-750-S
UXJCB
DJM-750-K, DJM-750-S
LXJ
DJM-750-K, DJM-750-S
KXJ5
DJM-750-K, DJM-750-S
XJCN5
PIONEER CORPORATION
PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
PIONEER CORPORATION
Type
Power Requirement
AC 220 V to 240 V
AC 120 V
AC 110 V to 120 V or 220 V to 240 V
AC 220 V
AC 220 V to 240 V
1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan
2013
DJM-750-K
K-MZV MAY
ORDER NO.
RRV4457
Remarks
2013 Printed in Japan

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Summary of Contents for Pioneer DJM-750-K

  • Page 1 PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936...
  • Page 2 PIONEER Service Manual. A subscription to, or additional copies of, Also test with plug reversed Earth PIONEER Service Manual may be obtained at a nominal (Using AC adapter ground charge from PIONEER. plug as required)
  • Page 3 10.4 INPUT ASSY (4/5) ..............................96 10.5 INPUT ASSY (5/5) ..............................98 10.6 MIC1 and MTRM ASSYS ............................100 10.7 MAIN ASSY (1/19)..............................102 10.8 MAIN ASSY (2/19)..............................104 10.9 MAIN ASSY (3/19)..............................106 10.10 MAIN ASSY (4/19)..............................108 DJM-750-K...
  • Page 4 11.1 INPUT, MIC1 and MTRM ASSYS ..........................160 11.2 MAIN ASSY................................164 11.3 SEC/HP, USBI and HPJK ASSYS..........................170 11.4 PNLA ASSY ................................174 11.5 PNLB and FADC ASSYS ............................178 11.6 FAD1 to FAD4 and REG ASSYS..........................182 11.7 TRANS, PRIMARY and ACSW ASSYS ........................184 12. PCB PARTS LIST ................................188 DJM-750-K...
  • Page 5 The settings are stored in Flash ROM (IC2802) on the MAIN Assy. To display the [USER SETUP] screen, hold [SETUP (WAKE UP)] pressed for at least 1 sec. To display the [CLUB SETUP] screen, press [POWER] (ON) while holding [SETUP (WAKE UP)] pressed. DJM-750-K...
  • Page 6 • Driver software/operating instructions CD-ROM (DXX2726) • USB cable (DDE1128) • Power cord (SYXJ8, LXJ: ADG7062) (UXJCB: DDG1108) (KXJ5: ADG7115) (XJCN5: ADG7105) • Read Before Use (Important)/Quick Start Guide (SYXJ8: DRH1205) (UXJCB: DRH1206) (LXJ: DRH1216) (KXJ5: DRH1219) (XJCN5: DRH1218) DJM-750-K...
  • Page 7 Part No. Purpose of use / Remarks USB cable GGP1193 for PC connection Lubricants and Glues List Name Part No. Remarks Silicon grease GEM1057 Refer to "9.3 BOTTOM SECTION". Lubricating oil GYA1001 Refer to "9.4 CONTROL PANEL SECTION (1/2)". DJM-750-K...
  • Page 8 2..TRANS ASSY (UXJCB) DWR1538 2..FAD1 ASSY DWX3434 2..TRANS ASSY (LXJ) DWR1531 2..FAD2 ASSY DWX3435 2..FAD3 ASSY DWX3436 2..PNLB ASSY DWX3440 2..FAD4 ASSY DWX3437 2..MIC1 ASSY DWX3441 2..FADC ASSY DWX3438 2..MTRM ASSY DWX3442 2..SHADE1 ASSY DWX3479 2..SHADE2 ASSY DWX3483 1..PNLA ASSY DWX3439 DJM-750-K...
  • Page 9 DJM-750-K...
  • Page 10 CN7002 CN8001 DKN1622-A HP_L_OUT HP_L_OUT KM200NA3LE V+3R3_REFA_PA KM200NA3E GNDHP GNDHP HP_LEVEL 3 V+3R3REF2 3 V+3R3REF2 2 VR_CFD GNDHP GNDHP 2 VR_CFD CROSS_FADER 1 GNDREF2 1 GNDREF2 PHONES HP_R_OUT HP_R_OUT LEVEL_DEPTH GNDD_REFA_PA BOOTH_LEVEL PF03PP6B07 V+3R3_REFB_PA L= 75mm PF04PP-S05 BLUE L=50mm DJM-750-K...
  • Page 11 V-HP_AC V-HP_AC (DWR1531: LXJ) 1/2, B13B-EH P=2.5mm CN5001 52147-1010 52147-1010 SEC/HP ASSY P=2.0mm V+5A_UNREG V+5A_UNREG GND5A_UNREG GND5A_UNREG (DWR1529) GND5A GND5A V+5A V+5A REG ASSY V-15A V-15A V-15A_UNREG V-15A_UNREG GNDA_UNREG GNDA_UNREG (DWR1528) GND_PO GND_PO V+15_UNREG V+15A_UNREG V+15A V+15A D20PYY1010E L=100mm DJM-750-K...
  • Page 12 ADAT MIDI_TXD_USB USBI ASSY UART(Downloard & other) SPI (Boot) ADAT_USBIN1 USB B ADAT_USBIN1 ADAT_U ADAT_USBIN2 differential 90Ω ADAT_USBIN2 USB Ucom ADAT_USBIN3 CH1 to 4 ADAT_U ADAT_USBIN3 ADAT_USBIN4 IC2603 ADAT_USBIN4 ADAT_U ADSP-BF525BBCZ-5A-K ADAT_U USB_S_CLK 106.5MHz SDRAM (64M) IC2604 16bit M12L64164A-5TG2M-K DJM-750-K...
  • Page 13 BOOTH (RCA) IC501 NJM4580MD IC3201 D810K013DZKB400-K IC602 NJM4565MD CH4_A SEND ADAT_SEND (TS) IC601 AK4384ET SEC/HP ASSY HPJK ASSY IC102 IC101 ETURN_ NJM4565MD NJM4580D ADAT_HP IC1001 AK4382AVT HEADPHONES SBIN1 ADAT_UDOUT1 ADAT_USB1 SBIN2 ADAT_UDOUT2 ADAT_USB2 SBIN3 ADAT_UDOUT3 SBIN4 ADAT_USB3 ADAT_UDOUT4 ADAT_USB4 DJM-750-K...
  • Page 14 BEAT EFFECT (Others) Effect SW Effect CH Select SEND BEAT Effect CH Select Effect CH Select Level Depth EFFECT Effect Out No Cable Effect SW Return Effect CH Select Level Effect Out RETURN Effect_C Cable Exist Cable Check Effect_C DJM-750-K...
  • Page 15 Effect CH Select CHx_CUE Effect Out Effect Cue On/Off SW Mixing Effect_CUE Mono Split H.P. MIX L Out Effect_C Stereo MONO SPLIT/ STEREO SWITCH MIXING 2Position Mono Split Master Master Cue On/Off SW Mixing H.P. MIX R Out Stereo Master_CU DJM-750-K...
  • Page 16 100Ω SDRAM ADRS/DATA 47Ω 82Ω 100Ω 100Ω 22Ω 22Ω 100Ω BF BUS 100Ω CLK(106.5MHz) 100Ω 68Ω SDRAM ADRS/DATA 100Ω USB UCOM 47Ω 68Ω (Blackfin) USB 2.0 0Ω USB2.0 (480MHz) USBI ASSY 0Ω Ω DSS1203 24.000MHz 12pF 10pF USB B DJM-750-K...
  • Page 17 22Ω 22Ω 100Ω RETURN ADC 0Ω DIGITAL OUT 100Ω 22Ω 0Ω CH1 ADC 0Ω 100Ω 22Ω 22Ω 0Ω CH3 ADC 0Ω 100Ω 100Ω 100Ω CH2 ADC 0Ω 100Ω 100Ω 100Ω 100Ω CH4 ADC 0Ω 100Ω 0Ω Buffer standby 0Ω DJM-750-K...
  • Page 18 Direct in AD port CH4_FADER Pin 53 VR_FADER3 Direct in AD port CH3_FADER MAIN UCOM Pin 54 VR_FADER_CRS Direct in AD port CROSS_FADER (MAIN ASSY IC2803) Pin 55 VR_FADER2 Direct in AD port CH2_FADER Pin 56 VR_FADER1 Direct in AD port CH1_FADER DJM-750-K...
  • Page 19 V+15A (for Opamp) 3300uF 6800uF 100uF /35V /16V /25V IC5003 3300uF 100uF NJM7915FA /35V /25V V - 15A (for Opamp) V-15A_UNREG P101 V+HP_UNREG Poly V+HP_UNREG_1 (for HP_Tr) 1000uF /25V 1000uF /25V V - HP_UNREG V - HP_UNREG_1 (for HP_Tr) DJM-750-K...
  • Page 20 VDET=LOW SETUP LED flashes four times Abnormal detection SETUP LED SUB UCOM communication check flashes five times Notifying of version (Initialization completion) Obtaining KEY data DJM-750-K...
  • Page 21 Initialization process of MAIN UCOM detection SETUP LED DSP communication check 2 flashes once KEY input reception Entering main loop Entering main loop Notifying of completion of input selector, automatic start information USB communication start MUTE setting OFF MUTE OFF (CPU_MUTE) Startup complete DJM-750-K...
  • Page 22 T14: Dependent on More than 600 ms after T1 (controlled by a timer) T28: The same time as T26 hardware design Monitoring restarts. Monitoring Monitoring POWER_RESET_A POWER_RESET_A Classification : Power : Clock : Hardware control signal : MAIN control signal DJM-750-K...
  • Page 23 Flash 24.576 MHz [11][5] [5][5] reset MAIN [2][9] UCOM reset CLK for Audio FPGA [12] [3][10] 20 MHz Flash Relay V+5A_UNREG 24 MHz UCOM V+1R2D con. 20 MHz V+3R3D con. UCOM Main V+5D Trans. con. V+13D_UNREG V+34D con. Audio DJM-750-K...
  • Page 24 Possible defective locations when white noise is NOT audible This diagnostic method is applicable to other DJ products equipped with an SG such as the NOISE effect generator. * A control having the same function may have another name, depending on the model. DJM-750-K...
  • Page 25 [5]. BLOCK DIAGRAM Silk for service • If the V+3R3E power cannot be confirmed, 5.4 INFORMATION [V+3R3E] the 3.3V REGULATOR (IC1401) block may be ON POWER defective. Check for the status of soldering and DIAGNOSTICS replace it. DJM-750-K...
  • Page 26 The FPGA (IC3007) or FLASH (IC2802) may ————— IC3007 corrections. be defective. Check for the status of soldering IC2802 and replace it. Check for status of soldering of dumping resistor implementing on the communi- cation line between MAIN UCOM and FPGA. DJM-750-K...
  • Page 27 If the symptom persists after the above USB UCOM (IC2603) or FLASH (IC2802) ————— IC2603 corrections. may be defective. Replace it. IC2802 Check for status of soldering of dumping resistor implementing on the communication line between MAIN UCOM and USB UCOM. DJM-750-K...
  • Page 28 • If Pin 4 is not normal for CH1/CH3 or if Pin 13 1-33 is not normal for CH2/CH4, and if there is no abnormality in the path from the FPGA (IC3007) to IC3006/IC3004/IC3005, soldering of the FPGA (IC3007) or this IC itself is defective. DJM-750-K...
  • Page 29 ADC, then check the soldering status and check for a defective part in the corresponding part. • If an audio signal is input, go to [3]. DJM-750-K...
  • Page 30 Silk for service • If the signal level at Pin 4 is L and there is no [AD/DA_RESET] abnormality in the path from the MAIN UCOM (IC2803) to IC2804, soldering of the MAIN UCOM (IC2803) or the IC itself is defective. DJM-750-K...
  • Page 31 • If MVR_MUTE (CN1002 pin 4) is L, Q203, 1-69 PNLA Assy. Q204 or peripheral parts must be improperly • Check that the MVR_MUTE (CN1002 soldered or defective. pin 4) level is Low. If the part is OK, go to [16]. DJM-750-K...
  • Page 32 /defective parts IC2803 pin 11 1-71 Check that the CPU_MUTE level is High. or R2833 must be improperly soldered or defective. Silk for service • If PU_MUTE is High, Q201, Q202, Q205 [CPU_MUTE] must be improperly soldered or defective. DJM-750-K...
  • Page 33 • If all signals are normal, soldering of the DIT pin 26 1-88 (IC3405) or the IC itself may be defective. ADAT_DOUT_FPGASRC Check the soldering status. If soldering is OK, pin 28 1-89 replace the defective part. FPGASRC_MCLK pin 30 1-90 DJM-750-K...
  • Page 34 After checking the above-mentioned items, check the setting of the application used again. If the symptom persists, a failure in hardware may be suspected. Check the CD/LINE and PHONO inputs and USB output, referring to [2-1] and [4-1] of Troubleshooting. DJM-750-K...
  • Page 35 Replace it. [6-2] LED display is abnormal Cause Diagnostics Point Item to be Checked Corrective Action Reference Defective LED TEST MODE Check for each LEDs works Each parts may be defective. 6.1 TEST MODE correctly with TEST MODE. Replace it. DJM-750-K...
  • Page 36 Replace it. 1-99 1-99 Representative CH1 0 to 10. • If no signal is output, the FPGA (IC3007) • Check for the FADER_STOP signal must be improperly soldered or defective. when the CH FADER is changed from 10 to 0. DJM-750-K...
  • Page 37 (V+3R3D_*) V+34D 31 to 36 (V+34D_*) V+3R3D_REFA 3.15 to 3.45 CH1-4 FADER, CROSS FADER (V+3R3D_REFA_*) V+3R3_REFB 3.15 to 3.45 (V+3R3D_REFB_*) V+3R3D_REFA 3.15 to 3.45 CROSS FADER (V+3R3D_REFA_*) ex) V+15A_* • • • • V+15A_O, V+15A_IN, etc • • • DJM-750-K...
  • Page 38 Identify which power-supply IC is defective, by turning the unit OFF then back ON while monitoring each voltage with an oscilloscope. Check the value of each voltage immediately before stopping power supply. Note: Each time before turning the unit ON, make sure that each power-supply IC is not short-circuited to GND. DJM-750-K...
  • Page 39 3.65 V Short-circuiting at GND or different power supply More than 4.01 to 6.72 V 6.22 V Short-circuiting at regulator (IC1402) IN/OUT V+3R3A − 1.12 to 1.95 V or less 1.29 V Short-circuiting at GND or different power supply DJM-750-K...
  • Page 40 I N C 2 0 0 2 A C 1 GNDA_OUT GNDA_OUT P 3 0 2 P 3 0 1 A E K 1 0 7 3 - A A E K 1 0 7 3 - A MASTER1_L_HOT MASTER1_R_HOT DJM-750-K...
  • Page 41 L S C R 5 2 3 U B Discharge circuit V+34C_CONT V+34D GNDD High R 1 4 1 6 Q 1 4 0 3 GNDD L S C R 5 2 3 U B 2 . 2 k GNDD DJM-750-K...
  • Page 42 Download the UPD file again then perform UPD file is found. updating again. ! An error has occurred. This message is displayed when updating in Perform updating again. It was not possible to update the program. progress was canceled because of an error. DJM-750-K...
  • Page 43 Devices to be added: • Universal Serial Bus controllers USB Composite Device • Under “Sound, video and game controllers” PIONEER DJM-750 DJM-750 USB Audio Device A communication check may be easily performed if connection is made with Device Manager displayed on the PC screen.
  • Page 44 The Master Out signal will not be output if the MAIN volume control is set to the minimum volume position. If the MAIN volume indicators are not displayed on the screen, set the TRAKTOR screen to Full screen. [Connection Diagram (When the CDJ Player is Connected to CH1)] DJM-750 DJM-750 Computers USB cable Power amplifier CDJ player DJM-750-K...
  • Page 45 Start up the "DJM-750 Settings Utility". (Reference) For Windows Click [Start] menu → [All Programs] → [Pioneer] → [DJM-750] → [DJM-750 Settings Utility]. For MacOS Click [Macintosh HD] → [Aplications] → [Pioneer] → [DJM-750] → [DJM-750 Settings Utility]. MIXER INPUT...
  • Page 46 1 After starting TRAKTOR, set the deck layout, in "Mixer". Figure of TRAKTOR2 screen image 2 Set the deck A to D, in "Live Input". Figure of TRAKTOR2 screen image 3 Select Traktor then Preferences, or click on the "Preferences" button. Figure of TRAKTOR2 screen image DJM-750-K...
  • Page 47 4 In "Audio Setup", select for Windows: PIONEER DJM-750 6 In "Input Routing", select "Input Channel A-D". ASIO, for Mac OS: PIONEER DJM-750. Figure of TRAKTOR2 screen image Figure of TRAKTOR2 screen image With the above settings, CH 1 of the mixer is assigned to 5 In "Output Routing", select "External,...
  • Page 48 MIDI FADER START (Rear panel) ON/OFF CH-2 POWER ON Mode 4 Mode 11 Test Mode (Mode 1) Mode 5 Mode 10 Mode 9 Mode 8 Mode 7 Mode 6 Test Mode : CANCEL (Rear panel) POWER OFF POWER SW DJM-750-K...
  • Page 49 BEAT BEAT BEAT d button d button d button BEAT BEAT BEAT c button c button c button Software Name FL Display System MAIN UCOM SUB UCOM DSP (program) DSP (data) USB UCOM FPGA BOOT DJM-750-K...
  • Page 50 CFX_2 COLOR FX CRUSH button COLOR FX CRUSH button LED CFX_3 COLOR FX FILTER button COLOR FX FILTER button LED CFX_4 BOOST button BOOST button LED and COLOR control LED BOOST EFFECT ON/OFF button EFFECT ON/OFF button LED EFXon DJM-750-K...
  • Page 51 CH4 Channel Level Indicator LED selector switch : Right -24dB -15dB -10dB Effect channel selector switch -7dB Master Level Indicator ED 1, 2, 3, 4, MIC, CF.A, CF.B, L CH : MIC -5dB MASTER : CF.A -3dB : CF.B -2dB : MASTER -1dB DJM-750-K...
  • Page 52 This mode is also used to check operation of the TIME control. The value displayed on the FL display increases/decreases as you turn the TIME control: Minimum value Initial value Maximum value Operation range Initial value: 0 Maximum value: 100 Minimum value: -100 Turn Turn counterclockwise. clockwise. DJM-750-K...
  • Page 53 Correspondence diagram of Mode 5 : SELECT SW Operating test. "SW TEST" DJM-750-K...
  • Page 54 EQ HI control Master Level Indicator L LED "+12": Full Illuminate "-12": Lights off EQ LOW control Master Level Indicator R LED "+12": Full Illuminate "LOW": Lights off COLOR control At the bottom of the FL display "HIGH": Full Illuminate DJM-750-K...
  • Page 55 CH4 EQ/ISO LOW control CH4 Channel Level Indicator LED "+6": Full Illuminate "-∞": Lights off BOOTH MONITOR control Master Levele Indicator L LED "0": Full Illuminate "MIN": Lights off LEVEL/DEPTH control Master Levele Indicator R LED "MAX": Full Illuminate DJM-750-K...
  • Page 56 "0": Lights off CH3 Channel Fader CH3 Channel Level Indicator LED "10": Full Illuminate "0": Lights off CH4 Channel Fader CH4 Channel Level Indicator LED "10": Full Illuminate "A": Lights off Cross Fader Master Level Indicator L LED "B": Full Illuminate DJM-750-K...
  • Page 57 CH2 CUE button CH2 Channel Level Indicator LED CH3 CUE button CH3 Channel Level Indicator LED CH4 CUE button CH4 Channel Level Indicator LED MASTER CUE button Master Level Indicator L LED EFFECT CUE button Master Level Indicator R LED DJM-750-K...
  • Page 58 If the CUE button is pressed while the last VR on each group list is displayed, the top VR on that group list will then be displayed. When the BEAT c, d button is pressed for a layer lower than the 2nd one, the top VR on the list of the next group will be displayed. DJM-750-K...
  • Page 59 "-∞": 000 LEVEL control HP_LV "0": 3FF *As an AD value that is displayed on the FL display is the one before a hysteresis removal process, and as it has an amplitude, an error of about ±2 may be produced. DJM-750-K...
  • Page 60 "MIN": 000 LEVEL/DEPTH control LV/DP "MAX": 3FF *As an AD value that is displayed on the FL display is the one before a hysteresis removal process, and as it has an amplitude, an error of about ±2 may be produced. DJM-750-K...
  • Page 61 FL Display Name Remarks "0": 000 CH1 Channel Fader "10": 3FF "0": 000 CH2 Channel Fader "10": 3FF "0": 000 CH3 Channel Fader "10": 3FF "0": 000 CH4 Channel Fader "10": 3FF "A": 000 Cross Fader CROSS "B": 3FF DJM-750-K...
  • Page 62 HP LEVEL LEVEL/ MASTER DEPTH BALANCE CH1 CUE CH2 CUE CH4 CUE CH3 CUE EQ LOW CH1 CUE Mode 11 : AD values of the fader test. "FDR AD" BEAT BEAT BEAT BEAT CROSS FADER FADER FADER FADER FADER DJM-750-K...
  • Page 63 M12L64164A-5TG2Y IC2604 MAIN Assy SUB UCOM LED, FL, KEY, VR control DYW1830 IC6601 PNLA Assy Two or more FLASH and SDRAM are mounted in this unit. Please judge the device which you should diagnose in reference to this list. DJM-750-K...
  • Page 64 Slider knob 2 Slider knob stopper (DAC2684) ×5 (DAC2685) ×5 (DNK5888) ×5 White White White Slider knob 2 Black White Gray Gray White Projection Slider knob 1 Black DAA1213 ×1 DAA1214 ×1 White Gray Slider knob stopper Black Black DJM-750-K...
  • Page 65 (1) Remove the one knob (DAA1302). ×2 (2) Remove the two screws. (BBZ30P060FTB) (3) Remove the two screws. (BBZ30P060FTC) (4) Remove the two screws. (BPZ30P120FTB) ×2 (5) Remove the six screws. (K: DBA1290, S: DBA1436) ×3 ×3 ×2 Screw tightening order DJM-750-K...
  • Page 66 Tighten the nuts after tightening the screws indicated in the figure on the left. Bracket/SCN (5) Remove the bracket/SCN by removing the one screw. (BBZ30P060FTC) MIC1 Assy (6) Remove the MTRM Assy with stay by removing the one screw. (BBZ30P060FTC) (7) Remove the MIC1 Assy. MTRM Assy DJM-750-K...
  • Page 67 (11) Lift up the INPUT Assy to a front direction. Control panel section PNLA Assy Diagnosis MAIN Assy PNLB Assy INPUT Assy ACSW Assy FADC Assy HPJK Assy SEC/HP Assy REG Assy PRIMARY Assy TRANS Assy DJM-750-K...
  • Page 68 (Positioning of the MAIN Assy is determined by its Bracket PSW attachment position on the rear panel.) MAIN Assy Rear panel Screw tightening order (SEC/HP, REG Assy) Screw tightening order (Stay/INP) MAIN Assy SEC/HP Assy REG Assy Stay/INP DJM-750-K...
  • Page 69 2: Be sure to clamp the cables to the Locking Wire Saddle so that they are styled coming from the coil side toward the side of the product, as shown in the figure above. DJM-750-K...
  • Page 70 2 *: During reassembly, fully push down slider knob 2 until it is Tweezers Protective material dented into Slider knob 1. 4 Remove the Slider knob 1. 5 Remove the slider knob stopper. Slider knob 1 slider knob stopper DJM-750-K...
  • Page 71 FAD4 Assy (5) Disconnect the four connectors. ×4 (CN6611, 6610, 6612, 6609) (6) Remove the FAD1 to FAD4 Assemblies. ×8 • Connectors color Match the color of a connected connector. ×2 ×2 ×2 CN7002 (Red) (Red) (White) (White) FADC Assy DJM-750-K...
  • Page 72 Assy Assy CRF stay FADC Assy [3-3] PNLA and PNLB Assemblies (1) Remove the lens. (2) Remove the ring. Lens (3) Remove the reflector. Ring Reflector (4) Remove the 27 flange nuts M9. ×27 (5) Remove the one nut. DJM-750-K...
  • Page 73 (10) Remove the six screws. (BBZ30P060FTC) ×2 (11) Remove the five screws. (BBZ30P060FTC) Barrier/PNL (12) Remove the barrier/PNL and barrier/A. (13) Remove the 14 screws. (BBZ30P060FTC) (14) Remove the PNLA and PNLB Assemblies. ×3 Barrier/A ×14 PNLA Assy PNLB Assy • Bottom view DJM-750-K...
  • Page 74 Barrier/A PNLB Assy Barrier/PNL Barrier/PNL Barrier/A Note: Tighten the screws (l to p) after performing styling of flexible cables. Put the FFC between this slit (barrier/PNL). Barrier/PNL Barrier/A Bend the two FFCs on some this side of edge (barrier/PNL). DJM-750-K...
  • Page 75 When the following parts are replaced, confirmation of the version of the firmware, updating to the latest version of the firmware. • MAIN Assy (MAIN UCOM: IC2803, FLASH: IC2802, FLASH: IC3008) • PNLA Assy (SUB UCOM: IC6601) DJM-750-K...
  • Page 76 If the current version, xxx, is displayed, you do not need to continue the update process. 3 Check the current version. 1 Connect your computer with DJM-750 by USB cable. 2 Press [CUE (BEAT EFFECT)] button and [ON/OFF (BEAT EFFECT)] button with power button. DJM-750-K...
  • Page 77 DJM-750, the update has been successfully completed. [Reference Information] You can run this updater program only on the following OS: Windows: WindowsXP/ Windows Vista/ Windows 7/ Windows8 MacOS: OS X 10.6/ 10.7/ 10.8 It will take approximately 3 minutes to complete the update process. DJM-750-K...
  • Page 78 MIDI Button Type MASTER ATT. -6dB -3dB TALK OVER MODE Auto Standby TALK OVER LEVEL -24dB -18dB -12dB -6dB Mic Output To Booth Monitor Peak Limiter PC Utility Factory Reset NEVER perform FACTORY RESET before taking note of setting data. DJM-750-K...
  • Page 79 DJM-750-K...
  • Page 80 Screws adjacent to b 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 SYXJ8 only DJM-750-K...
  • Page 81 8 Packing Pad/B DHA1884 9 Packing Case See Contrast table (2) 10 Packing Sheet RHC1023 (2) CONTRAST TABLE DJM-750-K/SYXJ8, UXJCB, LXJ, KXJ5, XJCN5, DJM-750-S/SYXJ8, UXJCB, LXJ, KXJ5 and XJCN5 are constructed the same except for the following: DJM-750-K DJM-750-K DJM-750-K DJM-750-K DJM-750-K...
  • Page 82 9.2 EXTERIOR SECION Refer to "9.4 CONTROL PANEL SECTION (1/2)" . UXJCB only UXJCB UXJCB, LXJ only only UXJCB only LXJ only LXJ only UXJCB Refer to only "9.3 BOTTOM SECTION" . DJM-750-K...
  • Page 83 BBZ30P060FTC 42 Screw BBZ40P060FTB 43 Screw BPZ30P080FTB 44 Screw BPZ30P120FTB (2) CONTRAST TABLE DJM-750-K/SYXJ8, UXJCB, LXJ, KXJ5, XJCN5, DJM-750-S/SYXJ8, UXJCB, LXJ, KXJ5 and XJCN5 are constructed the same except for the following: DJM-750-K DJM-750-K DJM-750-K DJM-750-K DJM-750-K Mark Symbol and Description...
  • Page 84 9.3 BOTTOM SECTION PNLA CN6602 PNLA INPUT CN6601 CN4802 USBI HPJK CN3801 CN9201 INPUT CN4803 INPUT CN4801 Silicon grease (GEM1057) Bottom side LXJ only UXJCB only LXJ only LXJ only DJM-750-K...
  • Page 85 VNE2489 39 Screw PPZ30P080FTB NSP 19 Spacer AEB7092 20 Spacer DEB1998 (2) CONTRAST TABLE DJM-750-K/SYXJ8, UXJCB, LXJ, KXJ5, XJCN5, DJM-750-S/SYXJ8, UXJCB, LXJ, KXJ5 and XJCN5 are constructed the same except for the following: DJM-750-K DJM-750-K DJM-750-K DJM-750-K DJM-750-K Mark Symbol and Description...
  • Page 86 9.4 CONTROL PANEL SECTION (1/2) Nut: Attached part of Rotary encoder Refer to "9.5 CONTROL PANEL SECTION (2/2)" . DJM-750-K...
  • Page 87 IMZ30P040FTC 19 Knob/RSW DAA1306 40 Screw PMA20P040FTC 20 Knob/FRE DAA1309 (2) CONTRAST TABLE DJM-750-K/SYXJ8, UXJCB, LXJ, KXJ5, XJCN5, DJM-750-S/SYXJ8, UXJCB, LXJ, KXJ5 and XJCN5 are constructed the same except for the following: DJM-750-K DJM-750-K DJM-750-K DJM-750-K DJM-750-K Mark Symbol and Description...
  • Page 88 9.5 CONTROL PANEL SECTION (2/2) • Bottom view Note: Refer to “7. DISASSEMBLY” for styling of flexible cables, barriers. MAIN CN1002 MAIN CN1001 Note: Fix the packing/L to the lower right of Barrier FL. DJM-750-K...
  • Page 89 19 Button/BLK DAC2920 20 Button/TAP DAC2921 21 Button/CFX DAC2923 22 Button/CUE DAC2925 23 Lens Holder DNK4533 24 Holder/LED DNK6230 25 Lebel Meter Assy DXB1882 26 • • • • • 27 • • • • • 28 Screw BBZ30P060FTC DJM-750-K...
  • Page 90 R 4 0 0 2 C 4 0 3 6 RS1/8SQ***J 0 . 1 u / 2 5 RN1/16SE****D GND_CH1 GND_CH2 CCSRCH***J GND_CH2 V-15A R 4 0 5 0 CKSQYB***K 1 . 2 k CKSRYB***K CFTLA CFTLA CEANP CEAT GND_CH2 DJM-750-K...
  • Page 91 C H 2 _ A S E L _ O U T Q 4 0 0 6 L T C 1 1 4 E U B 5:6D (L2) : CH2 LINE Signal (L CH) (CL2) : CH2 CD/LINE Signal (L CH) (C2) : CH2 Audio Signal (L CH) GND_CH2 DJM-750-K...
  • Page 92 C 4 2 1 8 0 . 0 1 u / 5 0 GND_CH4 CFTLA RN1/16SE****D 4 7 0 p / 5 0 1 . 2 k CCSRCH***J CKSQYB***K CKSRYB***K R 4 2 5 7 V-15A CFTLA CFTLA CEANP GND_CH4 CEAT GND_P4 DJM-750-K...
  • Page 93 Q 4 2 0 6 : CH3 Audio Signal (L CH) 5:8C L T C 1 1 4 E U B (P4) : CH4 PHONO Signal (L CH) (CL4) : CH4 CD/LINE Signal (L CH) (C4) : CH4 Audio Signal (L CH) GND_CH4 DJM-750-K...
  • Page 94 3 3 k NJM4565MD DKN1652-A V-15A Pull up Main side STBY GND_RET C 4 4 0 9 0 . 0 1 u / 5 0 CFTLA R 4 4 0 1 R 4 4 0 2 STBY GND_RET GND_CH4 DJM-750-K...
  • Page 95 R E T U R N _ R 5:8D R E T U R N _ I N Notes (RET A) : RETURN Audio Signal (L CH) is STBY RS1/10SR***J RS1/10SR****D RS1/8SQ***J RN1/16SE****D CCSRCH***J CKSQYB***K CKSRYB***K CFTLA CFTLA CEANP CEAT DJM-750-K...
  • Page 96 R 4 6 1 0 MIC_HOT_1 V-15A KN4601 VNE1948-A STBY C 4 6 2 7 STBY C 4 6 2 9 (MIC1 A V A 4 6 0 1 C 4 6 3 0 GND_CH1 GND_MIC1 1 u / 2 5 GNDD GND_MIC1 DJM-750-K...
  • Page 97 MIC1_TRIM_IN MIC1_TRIM_IN (MIC1 A) (MIC1 A) GND_MIC1 GND_MIC1 MIC1_TRIM_OUT MIC1_TRIM_OUT GND_MIC1 Notes (MIC1 A) is STBY : MIC1 Audio Signal RS1/10SR***J RS1/10SR****D : Voltage measuring point RS1/8SQ***J RN1/16SE****D : Waveform measuring point CCSRCH***J CKSQYB***K CKSRYB***K CFTLA CFTLA CEANP CEAT DJM-750-K...
  • Page 98 R 4 8 2 4 R 4 8 2 2 GND_CH2 GND_CH2 GND_CH4 GND_CH4 R 4 8 1 9 R 4 8 2 7 GND_RET GND_RET GND_CH4 GND_CH4 R 4 8 2 0 GND_RET GND_RET R 4 8 2 1 GND_RET GND_RET DJM-750-K...
  • Page 99 : CH2 Audio Signal (L CH) (C3) : CH3 Audio Signal (L CH) (C4) : CH4 Audio Signal (L CH) (RET A) : RETURN Audio Signal (L CH) (MIC1 A) : MIC1 Audio Signal : Voltage measuring point : Waveform measuring point DJM-750-K...
  • Page 100 E Z J Z 1 V 2 7 0 R M CKSQYB V A 9 0 0 2 CFTLA E Z J Z 1 V 2 7 0 R M RS1/10SR****J GNDF GNDA (MIC1 A) : MIC1 Audio Signal DJM-750-K...
  • Page 101 MIC1 TRIM GND_MIC1 MIC1_TRIM_OUT MIC1_TRIM_OUT R 8 8 0 1 C N 8 8 0 1 C K S 3 5 3 3 - A CHASSIS GND GND_MIC1 GND_MIC1 (MIC1 A) : MIC1 Audio Signal NOTES is STBY RS1/10SR***J DJM-750-K...
  • Page 102 (RET A) (RET A GNDIN_MIC GNDIN_CH1 GNDIN_CH4 GNDIN_RET GNDIN_CH2 R 1 0 8 6 CH4L CH4R (C4) GNDIN_MIC CH3L CH3R CH1L CH2L (C3) R 1 0 8 1 CH1R CH2R GNDD GNDD (C2) (C1) (MIC1 A) (MIC1 A 1/19 DJM-750-K...
  • Page 103 To CH1 ADC (C1) C H 1 _ L 4:2E (MIC1 A) M I C 1 8/19 8:8B To MIC/RET ADC M I C 2 8:8B 1/19 10/19 To MAIN_UCOM M I D I _ T X D 10:11A DJM-750-K...
  • Page 104 K N 1 2 0 3 K N 1 2 0 5 C K F 1 0 8 9 - A C K F 1 0 8 9 - A C K F 1 0 8 9 - A 2/19 GNDD DJM-750-K...
  • Page 105 : Voltage measuring point indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts : Waveform measuring point of identical designation. The check point for service. ***** (Legend silk indication on the PCB.) 2/19 DJM-750-K...
  • Page 106 L S C R 5 2 3 U B V+34C_CONT Discharge circuit V+34D GNDD High R 1 4 1 6 Q 1 4 0 3 GNDD L S C R 5 2 3 U B 2 . 2 k GNDD 3/19 DJM-750-K...
  • Page 107 : Voltage measuring point CEHVAW***M HVAW Therefore, when replacing, be sure to use parts CEANP***M of identical designation. CEANP : Waveform measuring point The check point for service. ***** (Legend silk indication on the PCB.) 3/19 DJM-750-K...
  • Page 108 1 0 k (1/2) C 1 6 1 2 STBY (CH1) V+5A_IN STBY R 1 6 1 2 D1604 1 . 2 k C 1 6 0 8 0 . 1 u / 2 5 GNDIN_CH1 V-15A_IN GNDA_OUT 4/19 DJM-750-K...
  • Page 109 1 0 0 0 p / 5 0 C 1 6 3 7 GNDA_OUT 0 . 0 1 u / 1 6 PCM, left-justified, 24-bit FMT0 Low GNDD FMT1 Low Dual rate ( 64 fS slavemode OSR0 High OSR1 Low OSR2 Low 4/19 DJM-750-K...
  • Page 110 1 0 k (1/2) C 1 8 1 2 STBY (CH2) V+5A_IN STBY R 1 8 1 2 D1804 1 . 2 k C 1 8 0 8 0 . 1 u / 2 5 GNDIN_CH2 GNDA_OUT V-15A_IN 5/19 DJM-750-K...
  • Page 111 1 0 0 0 p / 5 0 C 1 8 3 6 GNDA_OUT 0 . 0 1 u / 1 6 PCM, left-justified, 24-bit FMT0 Low FMT1 Low GNDD Dual rate ( 64 fS slavemode OSR0 High OSR1 Low OSR2 Low 5/19 DJM-750-K...
  • Page 112 1 0 k (1/2) C 2 0 1 2 STBY (CH3) V+5A_IN STBY R 2 0 1 2 D2004 1 . 2 k C 2 0 0 8 0 . 1 u / 2 5 GNDIN_CH3 GNDA_OUT V-15A_IN 6/19 DJM-750-K...
  • Page 113 1 0 0 0 p / 5 0 C 2 0 3 5 GNDA_OUT PCM, left-justified, 24-bit 0 . 0 1 u / 1 6 FMT0 Low FMT1 Low GNDD Dual rate ( 64 fS slavemode OSR0 High OSR1 Low OSR2 Low 6/19 DJM-750-K...
  • Page 114 (1/2) 1 0 k C 2 2 1 2 STBY V+5A_IN (CH4) STBY R 2 2 1 2 D2204 1 . 2 k C 2 2 0 8 0 . 1 u / 2 5 GNDIN_CH4 GNDA_OUT V-15A_IN 7/19 DJM-750-K...
  • Page 115 1 0 0 0 p / 5 0 C 2 2 3 5 GNDA_OUT 0 . 0 1 u / 1 6 PCM, left-justified, 24-bit FMT0 Low FMT1 Low GNDD Dual rate ( 64 fS slavemode OSR0 High OSR1 Low OSR2 Low 7/19 DJM-750-K...
  • Page 116 (MIC D) AK5358AET 1-38 1-39 1-37 1-40 ADAT_MIC C 2 4 1 8 STBY 1 0 0 0 p / 5 0 C 2 4 1 9 GNDA_OUT GNDD 0 . 0 1 u / 1 6 GNDD GNDIN_MIC 8/19 DJM-750-K...
  • Page 117 9 6 k _ C L K _ H P - M I C - R E CCSRCH***J SRCH 1:6C;5C;11:2L (MIC D) 13/19 To DSP ADAT_MIC_ANA CCSQCH***J SQCH 13:4H CFHXSQ***J CFHXSQ CEVW***M ADAT_MIC CEVWNP***M CEHVW***M CEHVAW***M HVAW CEANP***M CEANP The check point for service. ***** (Legend silk indication on the PCB.) 8/19 DJM-750-K...
  • Page 118 U S B _ R E S E T R E S E T B M O D E 2 10:14F 1 0 0 B M O D E 3 1-16 USB_RST V+3R3D_ BMODE3-0 : 0100 Boot from SPI host device GNDD 9/19 GNDD DJM-750-K...
  • Page 119 B M O D E 1 CEANP GNDD : Waveform measuring point B M O D E 2 B M O D E 3 V+3R3D_USB The check point for service. ***** (Legend silk indication on the PCB.) 9/19 GNDD DJM-750-K...
  • Page 120 R E L A Y _ C O N T Q 2 8 0 3 2 : 3 B L T C 0 2 4 E E B CPU_MUTE 15/19 10/19 GNDD To OUTPUT IF C P U _ M U T E 1 5 : 2 F DJM-750-K...
  • Page 121 R 2 8 4 3 GNDD V+3R3D_REFA_0 STBY 60pin 61pin Model name L 2 8 0 1 DJM-750-K,DJM-750-S (Original model) 3 3 u Nothing (Standby) LCTAW330J2520 STBY 1 0 k Nothing (Standby) 8 1 4 GNDD...
  • Page 122 6 M _ C L K _ H P - M I C - R E GNDD 1:6C;8:11C;8:5C BOARD IF 2 4 M _ C L K _ H P - M I C - R E 1:6C;8:11C;8:5C The check point for service. GNDD ***** (Legend silk indication on the PCB.) 11/19 DJM-750-K...
  • Page 123 U S B _ M O S I From To USB_UCOM GNDD FOR DSP 9:2J R 3 0 7 7 SPI Boot program U S B _ S C K 9:2I 11/19 9/19 U S B _ M I S O 9:2I DJM-750-K...
  • Page 124 RS1/10SR****D 1/8W RS1/8SQ***J 1/8W (F) RS1/8SQ****F 1/4W RS1/4SA***J RN1/16SE****D RAB4CQ***J CKSSYB***K CKSRYB***K CKSQYB***K : Voltage measuring point CCSSCH***J : Waveform measuring point CCSSCH***D CH (D) CCSRCH***J SRCH CCSQCH***J SQCH CFHXSQ***J CFHXSQ CEVW***M CEVWNP***M CEHVW***M CEHVAW***M HVAW CEANP***M 12/19 CEANP DJM-750-K...
  • Page 125 C V D D 1 8 P L L 0 _ V S S A K 1 1 C V D D 1 9 C V D D 2 0 R S V 1 GNDD R S V 2 12/19 DJM-750-K...
  • Page 126 A D A T _ U S B I N 2 From USB_UCOM 9:2H (CH3 U/D IN) A D A T _ U S B I N 3 9:2H (CH4 U/D IN) 9/19 A D A T _ U S B I N 4 9:2H 13/19 DJM-750-K...
  • Page 127 To USB_UCOM (CH2 U OUT) A D A T _ U S B 2 O U T 9:2H (CH1 U OUT) 9/19 A D A T _ U S B 1 O U T 9:2H 1 0 0 13/19 DJM-750-K...
  • Page 128 11:2D 6 M _ C L K _ D I G I 11:2C From DSP A D A T _ D O U T 13:13H 17pin C 13/19 Software mode non pull up Hardware mode pull up GNDD 14/19 DJM-750-K...
  • Page 129 The check point for service. 1/8W (F) RS1/8SQ****F ***** (Legend silk indication on the PCB.) 1/4W RS1/4SA***J RN1/16SE****D RAB4CQ***J CKSSYB***K CKSRYB***K ull up CKSQYB***K CCSSCH***J CCSSCH***D CH (D) CCSRCH***J SRCH CCSQCH***J SQCH CFHXSQ***J CFHXSQ CEVW***M CEVWNP***M CEHVW***M CEHVAW***M HVAW CEANP***M CEANP 14/19 DJM-750-K...
  • Page 130 M A S T E R _ M U T E MASTER2/REC 16:11E STBY 16/19 Q 2 0 3 L T C 0 2 4 E E B From BOARD IF M V R _ M U T E 1:4B 1/19 GNDD GNDD V-15A_O 15/19 GNDD DJM-750-K...
  • Page 131 CKSQYB***K CCSSCH***J : Waveform measuring point CCSSCH***D CH (D) CCSRCH***J SRCH CCSQCH***J SQCH The check point for service. CFHXSQ***J CFHXSQ ***** (Legend silk indication on the PCB.) CEVW***M To MASTER1 CEVWNP***M MASTER2/REC CEHVW***M 16/19 CEHVAW***M HVAW CEANP***M CEANP 15/19 DJM-750-K...
  • Page 132 Q 7 0 6 2 2 k R 7 1 2 GNDA_OUT I N C 2 0 0 2 A C 1 2 2 k I N C 2 0 0 2 A C 1 GNDA_OUT MASTER 2R (MA2) MASTER 2L+ 16/19 DJM-750-K...
  • Page 133 M A S T E R 2 _ L + 17:2B CFHXSQ***J : Waveform measuring point CFHXSQ MASTER 2L+ CEVW***M CEVWNP***M CEHVW***M The check point for service. ***** CEHVAW***M HVAW (Legend silk indication on the PCB.) 16/19 XCEAT***M XCEAT CEANP***M CEANP DJM-750-K...
  • Page 134 R E C _ R 15:5B 2 2 u / 6 . 3 3 . 3 k 2 . 7 k 2 . 4 k STBY R 4 3 8 Q 4 1 0 GNDA_OUT GNDA_O 1/19,15/19,16/19,18/19,19/19 M U T E 1:9B;15:4F;16:11E;18:3D;19:4E 17/19 DJM-750-K...
  • Page 135 CEVW***M R 4 1 6 1/2W CEVWNP***M CEHVW***M V-15A_O CEHVAW***M HVAW CEANP***M CEANP GNDA_OUT GNDA_OUT GNDA_OUT R 4 1 7 Q 4 0 6 I N C 2 0 0 2 A C 1 1 8 k 17/19 GNDA_OUT DJM-750-K...
  • Page 136 D C N 1 2 0 0 - A NJM4580MD 1/2W (2/2) 1-96 C 5 1 8 0 . 1 u / 2 5 GNDA_OUT GNDA_OUT C 5 1 9 4 7 u / 2 5 GND_PO V-15A_O 18/19 DJM-750-K...
  • Page 137 1 0 0 u / 1 6 SQCH 1/2W CFHXSQ***J CFHXSQ CEVW***M Q 5 0 4 I N C 2 0 0 2 A C 1 R 5 1 1 CEVWNP***M 1 8 k CEHVW***M CEHVAW***M HVAW CEANP***M CEANP GNDA_OUT 18/19 DJM-750-K...
  • Page 138 1/8W RS1/8SQ***J 1/8W (F) RS1/8SQ****F 1/4W RS1/4SA***J RN1/16SE****D RAB4CQ***J 1/19,15/19-18/19 From OUTPUT IF M U T E CKSSYB***K 1:9B;15:4F;16:11E;17:3G;18:3D CKSRYB***K CKSQYB***K CCSSCH***J CCSSCH***D CH (D) CCSRCH***J SRCH CCSQCH***J SQCH CFHXSQ***J CFHXSQ CEVW***M CEVWNP***M CEHVW***M CEHVAW***M HVAW CEANP***M CEANP 19/19 DJM-750-K...
  • Page 139 I N C 2 0 0 2 A C 1 GNDA_OUT GNDA_OUT (SEND D) : SEND OUT Digital Signal (SEND) : SEND OUT Signal (L ch) : Voltage measuring point : Waveform measuring point The check point for service. ***** (Legend silk indication on the PCB.) 19/19 DJM-750-K...
  • Page 140 R B 1 6 0 L - 4 0 D 1 2 R B 1 6 0 L - 4 0 C 1 8 C 2 2 1 0 0 0 p / 5 0 1 0 0 0 p / 5 0 Note GNDHP V-HP_UNREG DJM-750-K...
  • Page 141 Therefore, when replacing, be sure to use parts RS1/10SR***J STBY of identical designation. RS1/8SQ***J RS1/4SA***J RS1/10SR****D RN1/16SE****D The check point for service. NREG CCSRCH***J ***** (Legend silk indication on the PCB.) CKSRYB***K CKSQYB***K CFTLA CFTLA***J : Voltage measuring point CEANP : Waveform measuring point CEAT DJM-750-K...
  • Page 142 GNDA_HP R 1 2 4 1:10C INC2002A M U T E Q 1 0 4 STBY 1 5 k GNDA_HP R 1 1 9 GNDA_HP GNDHP GNDA_HP The check point for service. ***** (Legend silk indication on the PCB.) DJM-750-K...
  • Page 143 RN1/16SE****D (HP O) Therefore, when replacing, be sure to use parts : HP OUT Signal (L ch) RS1/8SQ***J of identical designation. CKSRYB***K : Voltage measuring point CKSQYB***K : Waveform measuring point CCSRCH***J CEANP CEAT DJM-750-K...
  • Page 144 L 3 8 0 1 V+5_SUB D-USB D-USB CN2602 D+USB D+USB V+5VBUS GND_USB STBY STBY GND_USB GNDF K N 3 8 0 1 C K F 1 0 8 9 - A NOTES is STBY RS1/16SS***J CKSSYB***K CCSSCH***J CCSRCH***D SRCH DJM-750-K...
  • Page 145 V A 9 2 0 1 GNDHP R 9 2 0 8 (HP O) : HP OUT Signal (L ch) C 9 2 0 5 Notes 0 . 0 1 u / 5 0 is STBY RS1/10SR***J CKSRYB***K CFTLA***J GNDF DJM-750-K...
  • Page 146 K M 2 0 0 N A 3 K M 2 0 0 N A 3 R K M 2 0 0 N A 3 K M 2 0 0 N A 3 R GNDD_REFA_PA GNDD_REFA_PA GNDD_REFA_PA GNDD_REFA_PA CN7201 CN7401 CN7601 CN7801 DJM-750-K...
  • Page 147 : Voltage measuring point V+3R3D_REFA is STBY 6 6 0 9 RS1/10SR***J 0 0 N A 3 R : Waveform measuring point RS1/10SR****D RS1/10SR****F CKSRYB The check point for service. ***** CCSRCH (Legend silk indication on the PCB.) CN7801 CEAT DJM-750-K...
  • Page 148 D A 2 J 1 0 1 IN2 SELECT MIC ON/OFF IN4 SELECT /TALKOVER VR_IN3 V R _ S E L _ 1 _ 0 1:6C 1:6C V R _ S E L _ 1 _ 1 VR_master VR_boost VR_IN5 GNDD_RE VR_IN6 DJM-750-K...
  • Page 149 D C S 1 0 9 5 - A GNDD_REFB_PA GNDD_REFB_PA TC74HC4052AF NJM2903M M V R _ M U T E GNDD_REFB_PA GNDD_REFB_PA GNDD_LED_PA 1:3G GNDD_REFB_PA GNDD_REFB_PA 1. OUTPUT1 8. V 2. -INPUT1 7. OUTPUT2 3. +INPUT1 6. -INPUT2 4. GND 5. +INPUT2 DJM-750-K...
  • Page 150 L S C R 5 2 3 U B EFX_ON/OFF EFX_ON/OFF GNDD_REFB_PA GNDD HP_MIX HP_MIX V+3R3_REFA GNDD_LED V+3R3_REFA_PA HP_LEVEL HP_LEVEL CROSS_FADER CROSS_FADER LEVEL_DEPTH LEVEL_DEPTH V+3R3_REFB GNDD_REFA_PA BOOTH_LEVEL BOOTH_LEVEL V+3R3_REFB_PA GNDD_LED GNDD GNDD_REFB GNDD_REFA V+3R3_REFA V+3R3_REFA_PB V+3R3_REFB V+3R3_REFB_PB GNDD_REFA GNDD_REFA_PB GNDD_REFB GNDD_REFB_PB DJM-750-K...
  • Page 151 K M 2 0 0 N A 3 E V R 8 0 0 1 D C V 1 0 0 6 - A GNDD_LED V+3R3REF2 V+3R3REF2 CROSS_FADER VR_CFD VR_CFD GNDREF2 GNDREF2 Connector Color:Blue GNDD_REFA_PB NOTES is STBY GNDF Notes RS1/10SR****J CKSRYB is STBY CEAT*** RS1/10SR***J DJM-750-K...
  • Page 152 D C V 1 0 2 0 - A FAD4 ASSY (DWX3437) C N 7 8 0 1 KM200NA3LR V+3R3REF2 VR_FD4 CN6609 GNDREF2 V R 7 8 0 1 D C V 1 0 2 0 - A K L M N DJM-750-K...
  • Page 153 1 p i n I N P U T O U T of identical designation. 2 p i n G N D G N D 3 p i n O U T P U T GND OUT spec symbol DJM-750-K...
  • Page 154 J P 3 1 0 1 DDX1285-A VIOLE NEUTRAL BROW 110V~120V BLUE 220V~240V : Voltage measuring point : Waveform measuring point J P 3 1 0 2 DDX1284-A VIOLE NEUTRAL NOTES is STBY BLUE LIVE CKSRYB P Q R OTHERS DJM-750-K...
  • Page 155 C 3 1 1 1 0 . 1 u / 5 0 P 3 1 0 2 V-HP_AC X1284-A J P 3 1 0 5 VIOLET EUTRAL P 3 1 0 5 GNDHP GNDD GNDA MAIN TRANS GNDF BLUE LIVE DJM-750-K...
  • Page 156 PCB diagram. INPUT ASSY INPUT SELECT (CD/LINE) INPUT SELECT (PHONO) CH1_L, R (CD/LINE) CH1_L, R (PHONO) V: 5 V/div. H: 200 μs/div. V: 5 V/div. H: 200 μs/div. V: 1 V/div. H: 200 μs/div. V: 20 mV/div. H: 200 μs/div. DJM-750-K...
  • Page 157 V: 1 V/div. H: 200 μs/div. V: 1 V/div. H: 20 ns/div. VINR+, - MIC1 ADAT_BOOTH, REC, MASTER_L, R 1-18 1-34 1-49 V: 1 V/div. H: 200 μs/div. V: 1 V/div. H: 200 μs/div. V: 1 V/div. H: 2 μs/div. DJM-750-K...
  • Page 158 V: 1 V/div. H: 500 ns/div. V: 200 mV/div. H: 100 ns/div. FL_LAT 3-15 V: 1 V/div. H: 500 μs/div. DOUT_SRC_LRCK D-USB 1-87 1-93 V: 1 V/div. H: 2 μs/div. V: 200 mV/div. H: 100 ns/div. FL_BK 3-16 V: 1 V/div. H: 500 μs/div. DJM-750-K...
  • Page 159 DJM-750-K...
  • Page 160 J4059 V-15A GND_CH2 J4009 J4013 J4105 J4100 GND_CH2 C4617 J4031 C4037 V+15A C4047 C4050 J4030 V-15A J4074 C4049 GND_PO J4016 C4618 J4006 V+15A J4069 J4076 GND_CH1 J4106 GND_CH1 J4023 J4037 C4048 GND_MIC1 C4801 C4802 CN4801 CN4801 A B C DJM-750-K...
  • Page 161 J4066 J4046 V-15A GND_CH4 J4099 C4248 J4067 C4250 GND_CH1 GND_CH4 GND_CH2 GND_CH3 GND_RET J4052 J4087 J4089 J4005 J4073 J4007 J4036 J4026 J4060 J4034 [[ G ]] CONTACT UPPER SIDE CN4802 CN4803 CONTACT UPPER SIDE CN4802 CN4803 (DNP2706-B) CN1003 CN1004 DJM-750-K...
  • Page 162 : Voltage measuring point : Waveform measuring point Q4202 Q4204 Q4203 Q4201 IC4203 IC4202 Q4205 IC4005 IC4004 Q4006 IC4401 IC4205 IC4204 Q4206 INPUT ASSY PHONO4 LINE3 LINE2 RETURN R4236 R4237 C4218 R4264 IC4203 IC4005 IC4202 IC4004 IC4401 IC4205 IC4204 CN4803 CN4802 DJM-750-K...
  • Page 163 SIDE B MTRM ASSY MIC1 ASSY CN8801 CN9001 CN8801 COLD CN9001 (DNP2708-B) SOLDER MIC1 DWX3441- (DNP2708-B) Q4002 Q4004 Q4003 Q4001 IC4004 Q4006 Q4005 Q4603 Q4602 IC4003 IC4002 IC4601 PHONO1 LINE2 INPUT DWX3432- IC4004 IC4003 IC4002 IC4601 (DNP2706-B) CN4801 DJM-750-K...
  • Page 164 IC3201 IC2602 IC2601 Q3201 IC2401 IC3202 IC2603 IC2402 IC2605 IC2604 IC1001 IC1408 IC1405 IC1404 * About [RESET_OUT] A print position of the PCB silk of the product is wrong. A print position listed in this service manual is correct. DJM-750-K...
  • Page 165 Q307 Q306 Q308 Q302 Q304 IC401 IC303 IC304 IC602 IC402 Q301 Q303 Q409 Q410 Q703-Q706 Q707-Q710 IC301 IC302 IC601 IC1604 IC2004 IC2804 IC1601 IC2001 IC1602 IC2002 IC1802 IC2202 IC1801 IC2201 IC1804 IC2204 Q1402 IC1401 IC1402 IC1403 Q1405 Q1406 (DNP2705-B) DJM-750-K...
  • Page 166 1-54 1-51 1-99 1-12 1-31 1-32 1-33 1-30 1-11 1-10 1-41 1-17 1-16 1-37 1-40 1-39 1-13 1-38 1-36 1-44 1-34 1-47 1-46 1-69 1-45 1-43 1-42 1-81 1-79 1-14 1-80 1-82 1-91 1-83 1-93 1-92 1-15 1-95 1-78 1-94 DJM-750-K...
  • Page 167 1-60 1-70 1-77 1-74 1-75 1-50 1-55 1-22 1-54 1-51 1-30 1-24 1-20 1-18 1-41 1-20 1-18 1-40 1-34 1-47 1-19 1-21 1-21 1-42 1-19 1-81 1-79 1-80 1-28 1-82 1-26 1-27 1-83 1-25 1-23 1-29 1-96 1-78 (DNP2705-B) DJM-750-K...
  • Page 168 SIDE B MAIN ASSY Q405-Q408 Q604 Q603 Q401-Q404 Q602 Q601 IC2003 IC1603 IC2203 IC1803 Q1201 IC1409 Q1206 Q203 Q1404 Q204 Q1401 Q1202 Q205 Q1403 Q1208 Q201 Q1207 Q202 Q2804 Q2803 DJM-750-K...
  • Page 169 SIDE B : Voltage measuring point : Waveform measuring point Q206 IC202 Q207 Q2801 IC2803 Q2802 Q701 Q702 IC1407 Q1204 Q1205 (DNP2705-B) DJM-750-K...
  • Page 170 IC102 DWR1529- SEC/HP GNDA_HP MUTE 3300uF Q105 P102 Q106 Q107 Q108 3300uF 6800uF V-HP_UNREG_1 6800uF V+HP_UNREG V+HP_UNREG V-HP_AC 6800uF BOND 1000uF GNDHP 6800uF 1000uF V+5A_UNREG V-15_AC 1000uF OPEN SIDE CN101 1000uF OPEN SIDE BEND CN101 CN3101 HPJK ASSY (DNP2706-B) DJM-750-K...
  • Page 171 : Voltage measuring point : Waveform measuring point blue character is silk for services. V-15A TH103 GND_PO V+15A GNDD TH104 3300uF 3300uF BOND GNDA_UNREG 3300uF 6800uF [[ G ]] 3300uF NREG V-15_AC (DNP2706-B) CN2602 CN3101 USBI ASSY CN3801 (DNP2705-B) DJM-750-K...
  • Page 172 SIDE B SEC/HP ASSY DWR1529- SEC/HP 4.V-15A 3.GND_PO 2.GND_PO 1.V+15A 10.V+5A_UNREG 9.GND5A_UNREG 8.GND5A 7.V+5A 6.V-15A 5.V-15A_UNREG 4.GNDA_UNREG 3.GND_PO 2.V+15A_UNREG 1.V+15A (DNP2706-B) USBI ASSY CN3801 (DNP2705-B) DJM-750-K...
  • Page 173 SIDE B : Voltage measuring point : Waveform measuring point Q102 IC101 IC101 DWR1529- Q102 EC/HP Q101 Q103 Q101 Q104 V+5A_UNREG GND5A_UNREG GND5A V+5A 5A_UNREG DA_UNREG D_PO NREG CN101 HPJK ASSY (DNP2706-B) DJM-750-K...
  • Page 174 ON/OFF J6689 J6776 J6691 D6728 J6821 D6727 J6925 J6906 CH2 FD J6841 START J6760 J6752 J6885 CH3 FD START S6642 S6641 C6601 J6777 J6775 J6882 OPEN SIDE OPEN S CN6601 CN6602 CN6611 CN6610 CN6612 CN1001 CN1002 CN7201 CN7401 CN7601 DJM-750-K...
  • Page 175 J6813 VR6602 J6856 J6790 J6725 CENTER J6608 J6680 CLICK 103B J6851 J6768 J6630 J6696 MASTER BALANCE J6868 J6695 J6694 J6632 S6622 BEAT EFX SELECT J6806 S6621 MASTER J6631 MONO/ST (DNP2707-A) OPEN SIDE J6877 CN6612 CN6609 CN6603 CN7601 CN7801 CN7001 DJM-750-K...
  • Page 176 GND_ GNDD REFB GND_LED V+3R3D_REFB GND_LED GND_REFB GNDD IC6604 GND_ IC6604 REFB GNDD MASTER BALANCE V+3R3D_REFB BEAT EFX SELECT GNDD MASTER MONO/ST 0 1 2 3 0 1 2 3 4 5 6 7 8 9 CN6603 CN6609 CN6612 DJM-750-K...
  • Page 177 R6706 GNDD Q6628 GNDD Q6636 C6642 GNDD CH1 CUE CH3 CUE CH2 CUE IC6601 MIDI START/STOP V+3R3D MIDI V+3R3D ON/OFF SUB_RST GNDD GNDD V+3R3D GNDD V+3R3D_REFA CH3 FD START CH2 FD V+3R3D START (DNP2707-A) CN6612 CN6610 CN6611 CN6602 CN6601 DJM-750-K...
  • Page 178 VR7002 VR7001 PNLB ASSY S7008 HEADPHONES MONO STEREO CENTER CLICK VR7002 MIXING THRU J7010 THRU THRU S7009 S7011 S7010 J7015 J7002 GNDD_REFB C7004 VR7001 J7012 C7006 V+3R3_REFB_PB LEVEL J7003 J7004 NON CLICK CN7002 V+3R3_REFB_PB J7005 CN7002 FADC ASSY (DNP2706-B) DJM-750-K...
  • Page 179 EFFECT CH SLECT VR7004 NON CLICK TIME BOOTH MONITOR S7001 EQ CURVE ISOLATOR S7014 THRU THRU S7010 S7012 S7013 LEVEL/DEPTH VR7003 CH FADER EQ CURVE PNLB J7025 CENTER CLICK DWX3440- S7015 J2001 CROSS FADER EQ CURVE D7007 J2002 D7005 (DNP2708-B) DJM-750-K...
  • Page 180 S7002 EFFECT CH SLECT VR7004 [[ G ]] BOOTH MONITOR EQ CURVE ISOLATOR S7001 S7014 TIME THRU THRU LEVEL/DEPTH CH FADER EQ CURVE S7012 S7010 S7013 VR7003 PNLB DWX3440- EFFECT ON/OFF S7015 D7007 S7007 CROSS FADER EQ CURVE D7005 DJM-750-K...
  • Page 181 21.KEY_IN3 20.ENC1_1 19.KEY_IN4 18.ENC1_0 17.KEY_IN5 VR7002 16.KEY_MTX3 15.KEY_IN6 THRU 14.KEY_MTX4 THRU 13.KEY_IN7 12.KEY_MTX5 11.EXF_ON/OFF 10.GNDD_REFB_PA 9.GNDD S7011 VR7001 8.HP_MIX S7009 7.CROSS_FADER 6.HP_LEVEL 5.V+3R3_REFA_PA 4.LEVEL_DEPTH GNDD_REFB LEVEL 3.GNDD_REFA_PA 3.V+3R3REF2 2.BOOTH_LEVEL 2.VR_CFD V+3R3_REFB_PB 1.V+3R3_REFB_PA 1.GNDREF2 V+3R3_REFB_PB (DNP2708-B) CN7002 FADC ASSY (DNP2706-B) DJM-750-K...
  • Page 182 V-15A J5002 GND_PO CHARACTER SIDE J5003 GNDA_UNREG J5001 IC5001 IC5002 NJM7805FA NJM7815FA NJM7915FA IC5003 (DNP2706-B) FAD2 ASSY IC5002 IC5003 IC5001 DWX3435- FAD2 VR7401 (DNP2706-B) FAD3 ASSY WHITE VR7601 DWX3436- FAD3 (DNP2706-B) FAD4 ASSY (DNP2706-B) K L M N O DJM-750-K...
  • Page 183 FAD1 ASSY CN5001 31 28 27 30 [[ G ]] FAD1 DWX3434- 3.GNDREF2 2.VR_FD1 1.V+3R3REF2 (DNP2706-B) FAD2 ASSY (DNP2706-B) (DNP2706-B) FAD3 ASSY (DNP2706-B) FAD4 ASSY [[ G ]] FAD4 DWX3437- 1.GNDREF2 2.VR_FD1 3.V+3R3REF2 (DNP2706-B) K L M N O DJM-750-K...
  • Page 184 DWR1533-[J]GREEN 2200uF JP3001 J3013 DWR1537-[U]BLUE DWR1530- [L]BLACK DWR1535- [SY][CN][K]RED BOND JP3001 3.V+11E_UNREG 2.GND_D 1.RELAY_CTRL [[ G ]] PRIMARY J3008 [L]ONLY LXJ ONLY J3009 [SY][CN][K][U][J] J3012 OTHERS J3011 3.220?`240V CN3003 2.110?`120V [L]ONLY 1.NEUTRAL CN3004 J3007 2.LIVE [SY][CN][K][U][J] 1.NEUTRAL [SY][CN][K][U][J] Q300 DJM-750-K...
  • Page 185 (DNP2708-B) BEND COLD Q3001 CAUTION REPLACE IC LINKS AS MARKED. E_UNREG FU1 TYPE No.218.630MXP MFD.BY LITTELFUSE INC. Y_CTRL FU1 T 630mAL 250V 2.NEUTRAL 1.LIVE WHITE J3008 [L]ONLY AC IN [SY][CN][K][U][J] C3002 J3007 H3002 H3001 J3006 630mAL 250V (DNP2708-B) Q3001 DJM-750-K...
  • Page 186 SIDE B ACSW ASSY (DNP2708-B) ADD S DJM-750-K...
  • Page 187 SIDE B TRANS ASSY (DNP2708-B) PRIMARY ASSY JP3001 COLD JP3001 3.V+11E_UNREG 2.GND_D 1.RELAY_CTRL ADD SOLDER PRIMARY ADD SOLDER 3.220?`240V CN3003 2.110?`120V [L]ONLY 1.NEUTRAL CN3004 2.LIVE [SY][CN][K][U][J] 1.NEUTRAL ADD SOLDER (DNP2708-B) DJM-750-K...
  • Page 188 > CN3003 Connector (VH) Not used Not used B3P5-VH Mark No. Description Part No. Mark No. Description Part No. IC 4401 NJM4565MD PARTS LIST (DJM-750-K/SYXJ8) IC 4601 NJM4580MD Q 4001-4004,4201-4204 2SK209 INPUT ASSY SEMICONDUCTORS Q 4005,4006,4205,4206 LTC114EUB IC 4001,4201 NJM4580D...
  • Page 189 C 4405,4408,4801,4802 CEAT101M25 IC 2802 DYW1828 C 4406,4407,4611,4805 CKSRYB103K50 IC 2803 DYW1827 C 4409 CFTLA103J50 IC 2804,3004-3006,3204 TC74VHC08FK C 4605 CKSRYB471K50 IC 3007 XC3S50A-4FTG256C C 4607,4613 CCSRCH471J50 IC 3008 DYW1829 C 4612 CKSRYB331K50 IC 3201 D810K013DZKB400 C 4614,4615 CKSRYB104K25 DJM-750-K...
  • Page 190 CN 2602 CONNECTOR AKM1276 CANON SHIELD DNF1789 R 1427 RS1/16SS3902D PHONE SHIELD DNF1875 R 1438 RS1/16SS2200D P 301,302 PROTECTOR(1A) (1 A) AEK1073 R 1601-1608,1801-1808 RN1/16SE1002D R 1609-1612,1809-1812 RN1/16SE1201D RESISTORS R 1613-1616,1813-1816 RN1/16SE2200D R 214,1075,1085,2657 RS1/10SR0R0J R 301-308,501,512 RN1/16SE3301D R 1617-1628,1817-1828 RN1/16SE2401D DJM-750-K...
  • Page 191 C 410,412,417,422 CCG1236 C 2033,2224,2227,2233 CEVW220M6R3 C 411,419,420,507 CKSRYB104K25 C 2035,2230,2235,2419 CKSSYB103K16 C 423-426,508,520 CEVW101M16 C 2205-2208 CKSRYB104K25 C 501,513,608,609 CEVW220M6R3 C 2219 CCH1998 C 504,516 CCSSCH220J50 C 2221,2223,2228,2231 CKSSYB104K10 C 506,519 CEVW470M25 C 2225,2226,2234,2418 CKSSYB102K50 C 509,521 CFHXSQ472J16 DJM-750-K...
  • Page 192 C 121-124 CKSRYB104K16 C 126,127 CEANP221M16 SEC/HP ASSY SEMICONDUCTORS USBI ASSY IC 1 S-80927CNMC-G8X IC 101 NJM4565MD MISCELLANEOUS IC 102 NJM4580D JA 9201 HEADPHONE JACK DKN1622 Q 101,102 2SK209 CN 9201 L-PLUG(4P) KM200NA4L Q 103,104 INC2002AC1 PHONE SHIELD DNF1875 DJM-750-K...
  • Page 193 DA2J101 D 6778 DA2J101 MISCELLANEOUS MISCELLANEOUS VR 7001,7004 POTENTIOMETER DCS1096 L 6601 CHIP COIL LCTAW330J2520 VR 7002 POTENTIOMETER DCS1097 V 6601 VFD DEL1071 VR 7003 VARIABLE RESISTOR DCS1100 VR 6601 VARIABLE RESISTOR DCS1100 S 7001 12MM GS ENCODER DSX1064 DJM-750-K...
  • Page 194 DEC3212 REG ASSY JP 9401 CONNECTOR ASSY 2P DKP3847 SEMICONDUCTORS CAPACITORS IC 5001 NJM7805FA IC 5002 NJM7815FA C 9401 ACG7030 IC 5003 NJM7915FA D 5004,5005 RB501VM-40 MISCELLANEOUS CN 5001 10PJUMPER CONNECTOR 52147-1010 CAPACITORS C 5001-5003,5010,5011 CKSRYB103K50 C 5004 CKSRYB104K16 DJM-750-K...

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