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D&R LYRA Maintenance Manual

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0DLQWHQDQFH 0DQX DO
Manual version: V1.0 (5 Juli 2006)

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Summary of Contents for D&R LYRA

  • Page 1 0DLQWHQDQFH 0DQX DO Manual version: V1.0 (5 Juli 2006)

  • Page 2: Table Of Contents

    5. Step 5 (Removing the Front panel PCB)..............- 13 - Product improvements hardware..................- 14 - Software (NIOS) revision history................- 15 - FPGA firmware revision history................- 17 - Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041. info@d-r.nl...

  • Page 3: Safety Procedures

    Index 2. Safety Procedures The Lyra may only be serviced in a static safe work area. Failure to do so will void warrenty! 3. Opening the Lyra Before you open the Lyra you have to turn off the power ! You can open the Lyra cover by removing 9 screws.

  • Page 4: Maintenance Inside The Lyra

    The System Fan needs to be cleaned once a year to ensure that the temperature inside the Lyra does not get too hot. This can be done by opening the Lyra and blowing compressed air from the inside through the Fan. Or you can remove the Fan by removing the two or four (depending on the production date of your Lyra) screws with which the Fan is mounted in the casing.

  • Page 5: Identifying The Pcb's In A Lyra

    5. Identifying the PCB’s in a Lyra 1. The Core PCB (1) This PCB is the Core of the Lyra. On this PCB there is a Texas Instruments DSP processor which processes the digitized audio signals (i.e. Leveling, EQ, Dynamics etc…).

  • Page 6: The Front Panel Pcb (4)

    5. The Power supply (5) The Power supply in the Lyra is a switched mode power supply. It delivers 65 Watts of power and generates the following voltages +5V(5 Amp max), +15V(2Amp max), - 15V(0,5 Amp max).

  • Page 7: Measuring The Voltages Inside The Lyra

    Index 6. Measuring the Voltages inside the Lyra To measure the voltages in the Lyra you will need a volt meter. Connect the – (black) of the meter to the chassis for ground. 1. The Core PCB Voltages There are 4 voltages present on the Core PCB.

  • Page 8: Disassembling The Lyra

    You will need to cut through the glue in order to release the connector. However if you only have to do a visual inspection or simple maintenance then you can leave the Core PCB connected an place it behind the Lyra. Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041. info@d-r.nl...
  • Page 9 Index Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041. info@d-r.nl...

  • Page 10: Step 3 (Removing The Digital In/Output Pcb)

    PCB to the side. Revision B PCB’s have PCB terminal blocks. For the BNC nuts you will need a 14mm spanner. For the other nuts you will need either a 1/4” spanner or a 5mm spanner. Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041. info@d-r.nl...

  • Page 11: Step 4 (Removing The Analog In/Output Pcb)

    4. Step 4 (Removing the Analog in/output PCB) To remove the Analogue in/output PCB you need to remove the For the nuts you will need either a 1/4” spanner or a 5mm spanner. Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041. info@d-r.nl...

  • Page 12: Step 5 (Removing The Front Panel Pcb)

    When putting the PCB back in the front panel please take care that you do not over tighten the screws as they are is a danger that the plastic wears out. Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041. info@d-r.nl...

  • Page 13: Product Improvements Hardware

    8. Product improvements hardware From 9 September 2004: L1 and L2 on Lyra DIG PCB changed from 4.7 H into a wire bridge. This to stop oscillation of the 3.3V power rail when a CobraNet option is installed. Lyra DIG PCB revision B this is fixed with a SMD 0Ohm resistor.

  • Page 14: Software (Nios) Revision History

    Change C5, C6, C11, C12, C19, C20, C25, C26 on Front panel PCB to 10 F with a 100.0 Ohms 1% resistor Switching the Phantom power while the Lyra is switched on can damage the Microphone inputs. This modification makes the Microphone inputs stronger without concessions to the sonic integrity of the input.
  • Page 15 • An IP address with a “0” in it is now valid. • New channel “mono” modes added, Mono (Left+Right), Mono from Left channel only, Mono from Right channel only. • Clear Log button added on Connection Log page. Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041. info@d-r.nl...

  • Page 16: Fpga Firmware Revision History

    • SNMP read/write communities are read and saved correctly. For this to work correctly you will need CM-1 firmware V2.9.12 and higher and for CM-2 firmware 2.10.6 and higher (See “CobraNet Settings” page on the Lyra web page). • Fixed problem with Remote Buss when FaderOn and On was set.
  • Page 17 V1.2: 15 Oct 2004. • CobraNet audio data 4x2 channels instead of 4x4 channels. V1.3: 2 June 2006. • Fixed problem with digital output 4 always following digital output 3. Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041. info@d-r.nl...

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