ALLEN & HEATH SQ Service Manual
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ALLEN & HEATH SQ Service Manual

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SQ Service Guide
DISTRIBUTOR USE ONLY!

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Summary of Contents for ALLEN & HEATH SQ

  • Page 1 SQ Service Guide DISTRIBUTOR USE ONLY!
  • Page 2 Warranty The Allen & Heath warranty policy is as follows: If the unit fails within 30 days of receipt by the distributor, then A&H will offer a parts for repair. If the unit is DOA, then A&H will offer a replacement unit. If the unit fails within 12 months of purchase by the end user, then A&H will offer parts free of charge for repair by the distributor.
  • Page 3 SQ Disassembly...
  • Page 4 Bottom Panel Remove fixings from the bottom panel to access the inside of the unit.
  • Page 5 Fans Fold the bottom panel back and unclip the fan connections to remove the bottom panel...
  • Page 6 12v Fader Motor Supply A separate power supply to the fader board is dedicated for the fader motors. This 12 volt supply is regulated down to 5 volts on the fader board.
  • Page 7 Fader PCB Each fader has a dedicated wire form and can be removed individually, when replacing a fader, the PCB screws must be removed. When testing an issue with a fader, the wire form for the faulty fader can be swapped with an adjacent fader to test if the PCB or motor is at fault –...
  • Page 8 Fader Wiring When replacing a fader motor, the wire form should be reused from the old fader unless a new wire form is requested. Below is a reference for the wire connections when changing a fader motor.
  • Page 9 Screen Connection The TFT screen has two separate connections to the CPU on SQ, the thin cable (left) is for touch, and the larger (right) cable is for display. The back panel will need to be removed for access to the Screen, CPU PCB and Surface PCB.
  • Page 10 Screen Mounting The screen is mounted underneath the CPU PCB. When replacing a screen, the mounting PCB and Bezel should be reused. Please note: The adhesive pad protectors on the back of the screen should not be removed. The screen should not be stuck to the mounting PCB.
  • Page 11 LCD Mounting There is a separate PCB for each bank of 4 LCD screens. If the first PCB in the chain (left) has an issue, it may affected the others. For example, if there is a problem with the back light on the first PCB, all the back lights may be affected.
  • Page 12 LCD Bezel The bezel surround of the LCD screen is made of harder material and can get caught on the metal work when mounting. If it get’s caught it will cause pinching and discolouration on the screen. With the unit on its side, make sure the LCD is mounted correctly before fixing in place.
  • Page 13 SQ Diagnostics...
  • Page 14 Power Distribution Fader DC-DC Network SQ5 & SQ6 – AG10964 SQ5 & SQ6 - AG10938 SQ5 – AG10762 SQ6 - AG11096 (12v supply for fader motors only) +12v +3v3 Audio Input Surface SQ5 & SQ6 - AG10820 SQ5 & SQ6 – AG10996 SQ5 –...
  • Page 15 Routing Overview = Audio = Control = USB Fader Network SQ5 & SQ6 - AG10938 = Ethernet SQ5 – AG10762 SQ6 - AG11096 Audio Input Surface SQ5 & SQ6 - AG10820 SQ5 & SQ6 – AG10996 SQ5 – AG10963 SQ6 – AG11092 Audio Output DSP - FX Channel...
  • Page 16 4Ch LDC Screen Overview = Power = Text Control = Backlight Control 4Ch LCD 4Ch LCD 4Ch LCD 4Ch LCD 4Ch LCD 4Ch LCD 4Ch LCD 4Ch LCD AE10814 AE10814 AE10814 AE10814 AE10814 AE10814 AE10814 AE10814 Channel SQ5 - AG10992 SQ6 –...
  • Page 17 Diagnostics A number of LEDs are placed on the main CPU, Fader board, DSP-FX board and I/O cards to help monitor activity on these boards. This includes LEDs for power rails, high speed link, and FPGA/DSP programmed and active. The Blue LED on the rear of the unit should be static. Due to the presence of these LEDs, there are less needs for power rail test points.
  • Page 18 +1V5, +1V8, +2V5, +3V3 and +12V rails) On Solid = Power Good 4. +1V0 Error Red LED. On Solid = CPU power issue. 5. +5V USB Yellow LED, Power for SQ-Drive port. On Solid = Power Good 6. Debug 0 = High Speed Link (HSL) between CPU, DSP FX and IO Card.
  • Page 19 +3V3 rail Green LED. On Solid = Power Good 2. DSP Program indicator Yellow LED (U16A & U16B) On Solid = DSP Programmed 3. Prog OK = FPGA Programmed. Blue LED displays heart beat pattern. 4. Link OK = HSL status Green LED. On Solid = Link OK ERROR = HSL Error indicator Red LED.
  • Page 20 1. Active = Processor Active Yellow LED. Displays heart beat pattern. Two (2) present on SQ6. The processor is powered by the +3V3 rail, if this LED is off, there is likely an issue with the +3V3 rail. 2. +3V3 rail Yellow LED. On Solid = Good (SQ5 Only) 3.
  • Page 21 Fader Motor Test Points SQ5 – AG10762 Test between CN3 pin and LK4 pad. Test between CN3 pin and LK6 pad. The 12v input is regulated down to a 5v supply for the Fader Motors only. The 5v supply can be tested using these test points.
  • Page 22 – Firmware update does not install on both images: The SQ has a main image and back-up image for stability and redundancy. If an update has been carried out, and the SQ boots into an older firmware, the update should be carried out again to ensure both...
  • Page 23 Hard Reset Hold the EQ ‘In’ and ‘HF’ keys when powering on the SQ. This will clear all mix settings and all saved data, including Scenes and Libraries, so the customer should back-up any data they wish to keep.
  • Page 24 A hard rest should be Please note: If the .bin firmware performed after a forced reinstall file is loaded into a folder on the of firmware. USB, the SQ will not see it. The file must be in the root of the drive.

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