ALLEN & HEATH QU-24 Service Manual
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ALLEN & HEATH QU-24 Service Manual

ALLEN & HEATH QU-24 Service Manual

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QU-24/QU-24C
SERVICE MANUAL
ISSUE 1.3
DISTRIBUTOR USE ONLY
Copyright © 2022 Allen & Heath. All rights reserved .
ALLEN&HEATH
Allen & Heath Limited, Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK
https://www.allen-heath.com

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Summary of Contents for ALLEN & HEATH QU-24

  • Page 1 QU-24/QU-24C SERVICE MANUAL ISSUE 1.3 DISTRIBUTOR USE ONLY Copyright © 2022 Allen & Heath. All rights reserved . ALLEN&HEATH Allen & Heath Limited, Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK https://www.allen-heath.com...

  • Page 2: Table Of Contents

    CPU LEDs ..............................27 Disassembly Procedure ..........................28 12v Fader Motor Supply ..........................28 Changing the Screen ..........................31 Remove Surface PCB ..........................32 Channel LEDs ............................33 Power Distribution ............................34 Allen & Heath Ltd QU-24 - Service Manual...
  • Page 3 Routing Overview ............................35 Power Good Circuit ............................36 Other Technical Information .......................... 37 Block Diagram ............................37 Specifications ............................37 Weights & Dimensions ..........................37 Allen & Heath Ltd QU-24 - Service Manual...

  • Page 4: Notices

    Heed the important mains plug wiring instructions in the Safety Instructions sheet. Always replace the equipment mains fuse with the correct type and rating as marked on the equipment panel. Allen & Heath Ltd QU-24 - Service Manual...
  • Page 5 Never solder directly onto the cells. Perform soldering as quickly as possible. Never reverse the battery polarity when installing. Do not short the batteries. Do not attempt to recharge batteries. Do not disassemble the batteries. Never heat batteries or throw them into fire. Allen & Heath Ltd QU-24 - Service Manual...

  • Page 6: Parts Identification

    AJ7304 Knob BK-WH Chrome & Original Version AK0102 Feet 21mm AJ9375 Lightpipe QU Fader AK5069 Feet 15mm AA9401 Keymat Rubber Qu-24 light AA8905 Keymat Rubber Qu-16 Channel AA8906 Keymat Rubber Qu-16 Multi AA9311 Keymat Rubber Qu-24 Multi Screws Part Number...
  • Page 7 Qu-24 Audio PCB (Previously AG9267 - 004-484) 004-392 AG8892 Qu-16,24 & 32 Headphone + USB 004-482 AG9326 Qu-24 Surface 004-1742-1 AG9292 Qu-24 Fader V3 (Previously 004-483 and 004-1272 V2) AI8649-2 Qu-24 Motor Fader 004-487 AG9294 Qu-24 Mains Inlet 004-488 AG9334 Qu-24 Digital I/O...

  • Page 8: Chrome Version

    AJ9842 Fader Knob QTY: 25 AA12214 Base Panel Metalwork AA8952-L Left Side Trim -- Metal AA8771-L Left Side Moulding Plastic AA8952-R Right Side Trim -- Metal AA8771-R Right Side Moulding -- Plastic Allen & Heath Ltd QU-24 - Service Manual...

  • Page 9: Original Version

    AJ9015 Fader Knob QTY: 25 AA12214 Base Panel Metalwork AA8952-L Left Side Trim -- Metal AA8771-L Left Side Moulding Plastic AA8952-R Right Side Trim -- Metal AA8771-R Right Side Moulding -- Plastic Allen & Heath Ltd QU-24 - Service Manual...
  • Page 10 AK0102 Feet AJ2887 AB6571 21mm QTY: 2 AC Push Button AC Cable Clamp AK5069 Feet 15mm QTY: 2 AA9401 Keymat Qu-24 Light AA8905 Keymat Channel AA8906 Keymat Multi AA9311 Keymat Qu-24 Multi Allen & Heath Ltd QU-24 - Service Manual...

  • Page 11: Circuit Board Layout

    3.- Headphones + USB PCB AG8892 004-392 4.- Digital I/O AG9334 004-488 5.- Connector PCB AG9269 004-485 6.- Audio PCB AG12558 004-1343 7.- CPU PCB AG9293 004-1660 8.- LCD TFT Screen 004-397 Allen & Heath Ltd QU-24 - Service Manual...

  • Page 12: Wire Layout

    6.- AH9389 - USB Rear (From DIGI I/O PCBA) 7.- AH9386 - DSnake (Longer RJ45) 8.- AK9238 TFT 9.- AL8995 - IDC WFM AUDIO to H/P *Please refer to page 24 for a new route implementation of Harness AL9392 Allen & Heath Ltd QU-24 - Service Manual...

  • Page 13: Circuit Board Identification

    Parts Identification Circuit Board Identification AM11257 (Previously AM9374) Part Number 004-1335 (Previously 004-496) Description Qu-24 PSU Allen & Heath Ltd QU-24 - Service Manual...
  • Page 14 Parts Identification AG9286 Part Number 004-486 Description Qu-24 DC-DC Converter AL9393 Harness CN1 to AG9294 AL9391 Harness CN2 to AG12558 CN5 AL9392 Harness CN3 to AG9293 CN2 AL9384 Harness CN6 to AM11257 PSU Allen & Heath Ltd QU-24 - Service Manual...
  • Page 15 Parts Identification AG9294 Part Number 004-487 Description Qu-24 Main Inlet AL3178 Fuse Holder AL5727 Fuse 2A T 20mm AL3458 AC Inlet AJ2887 Button AL8837 Switch Allen & Heath Ltd QU-24 - Service Manual...
  • Page 16 Harness CN14 to AG9292 CN14 QTY: 1 AH9388 Harness CN24 to AG8892 CN5 QTY: 1 AH9389 Harness CN26 to AG9334 CN2 QTY: 1 AH9386 CAT5 RJ12 CN22 to AG9334 CN6 QTY: 1 Allen & Heath Ltd QU-24 - Service Manual...
  • Page 17 AL9019 XLR Female 4 pin QTY: 1 AL2410 XLR Female QTY: 25 AL2411 XLR Male QTY: 21 AL9137 Jack switched (ST1 R & ST2 R) QTY: 2 AL9136 Jack un-switched QTY: 30 Allen & Heath Ltd QU-24 - Service Manual...
  • Page 18 004-1343 Previously 004-484 Description Qu-24 Audio *Read the servicing section before fitting this part AL8995 Harness CN1 to AG8892 AL9391 Harness AL8920 CN5 to AG9286 Box Header 2.54mm CN3 (on rear) to AG9293 Allen & Heath Ltd QU-24 - Service Manual...
  • Page 19 Part Number 004-392 Description QU-24 Headphone/USB AI8007 AL8995 Alt Out Harness CN2 to AG12558 AI8007 Headphone AL6893 Headphone AE6017 LED 3MM AH9388 AL9143 Harness USB Qu Drive CN2 to AG9293 AL5323 ST3 Input Allen & Heath Ltd QU-24 - Service Manual...
  • Page 20 Parts Identification AG9326 Part Number 004-482 Description Qu-24 surface AI8567 Encoder QTY 18 Allen & Heath Ltd QU-24 - Service Manual...
  • Page 21 Part Number 004-1742-1 (Previously 004-483 and 004-1272) Description Qu-24 Fader V3 AL9392 Harness DC Power CN2 to AG9286 CN3 AI8649-2 Motor Fader QTY: 25 AL8992 Harness DC Power CN14 to AG9293 CN14 Allen & Heath Ltd QU-24 - Service Manual...
  • Page 22 CN2 to AG9293 CN26 AE6107 LED 3MM AL7879 SKT RJ45 AL9091 SKT RJ12 AH9387 Harness CN4 to AG9293 CN19 AE6107 AL9091 LED 3MM SKT RJ12 AH9386 Harness CN6 to AG9293 CN22 AL5821 SKT RJ45 Allen & Heath Ltd QU-24 - Service Manual...

  • Page 23: Servicing Information

    Go to Setup > Utility > Firmware to install new firmware and view the current firmware version. You will need to format the USB drive under the Status/Format tab before placing the firmware on the drive using a computer. Allen & Heath Ltd QU-24 - Service Manual...

  • Page 24: Forced Reinstall Of Firmware

    Press and hold the above keys whilst powering on the unit. A hard reset should be performed after a forced reinstall of firmware. Hard Reset Press and hold the above keys whilst powering on the unit Allen & Heath Ltd QU-24 - Service Manual...

  • Page 25: User Settings Reset

    Press and hold the above keys (Reset & Home) whilst powering on the unit Calibrations Go to Setup Utility Calibration Use the routines here to calibrate the touch accuracy of the Touch Screen and positional accuracy of the Motor Faders. Follow the on-screen instructions Allen & Heath Ltd QU-24 - Service Manual...

  • Page 26: Recn4709

    Qu-24 units. RECN3111 Qu-16/Qu-24 mixers fitted with Headphone PCB AG8892_3 or earlier may experience noise when a USB device is connected to the Qu-Drive socket and ST3 is configured to LOCAL with NO cable connected to the 3.5mm input socket.

  • Page 27: Al9392 Wfma 12V Power Harness Re-Route

    Headphones/Alt out PCB, reducing noise injection into Audio, affecting Alt Out residual noise performance. If a Qu-24 unit is in service, kindly proceed with this new route procedure as part of the service. Allen & Heath Ltd QU-24 - Service Manual...

  • Page 28: Diagnostics

    LD4 DSP Programmed (U26 & U27), Yellow LED on solid LD12 DSP FX Programmed (U34), Yellow LED on solid LD14 USB Processor Alive, Yellow LED with heartbeat pattern LD16 DSP Programmed (U28 & U29), Yellow LED on solid Allen & Heath Ltd QU-24 - Service Manual...

  • Page 29: Disassembly Procedure

    Disassembly Procedure Disassembly Procedure Allen & Heath Ltd QU-24 - Service Manual...
  • Page 30 Disassembly Procedure Allen & Heath Ltd QU-24 - Service Manual...

  • Page 31: 12V Fader Motor Supply

    Disassembly Procedure 12v Fader Motor Supply Allen & Heath Ltd QU-24 - Service Manual...

  • Page 32: Changing The Screen

    Changing the Screen Disconnect flexi cables from Hot Melt Glue must be carefully removed and re-applied at the connectors during this procedure. Refer to the section in page 21 for further details. Remove CPU Allen & Heath Ltd QU-24 - Service Manual...

  • Page 33: Remove Surface Pcb

    Remove Surface Remove screen by pressing the side locks of the bezel For more details on how to replace screen, follow the -16/24 located at the resource space: Allen & Heath Asset Library Allen & Heath Ltd QU-24 - Service Manual...

  • Page 34: Channel Leds

    Disassembly Procedure Channel LEDs Allen & Heath Ltd QU-24 - Service Manual...

  • Page 35: Power Distribution

    CPU CN2 Pins 20&22 = +3v3 Pins 2, 4 & 6 = +12v - From CPU CN14 to Fader Board CN14 Pins 1, 3 & 5 = Earth Pins 7&9 = +3v3 Allen & Heath Ltd QU-24 - Service Manual...

  • Page 36: Routing Overview

    Routing Overview Routing Overview USB/Headphones Audio Connector AG8892 AG12558 AG9269 Surface Fader AG9326 AG9293 AG9292 dSnake LCD TFT DIGI I/O AG9334 Audio Control Ethernet Allen & Heath Ltd QU-24 - Service Manual...

  • Page 37: Power Good Circuit

    Power Good Circuit Power Good Circuit Allen & Heath Ltd QU-24 - Service Manual...

  • Page 38: Other Technical Information

    Weights & Dimensions All of this information is available to end users and can be found at the following location. Qu-24 - Allen & Heath (allen-heath.com) For further information please contact Allen&Heath Product Support Product Support - Allen & Heath (allen-heath.com) Allen &...

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