Summary of Lyra
Page 1
Manual version: v1.0 (5 juli 2006).
Page 2: 1. Index
Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 1. Index ............................................................................................................................................- 2 - 1. Index.................................................
Page 3: 2. Safety Procedures
Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 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 th...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 4. Maintenance inside the lyra there are several maintenance issues that you can do without having to dismantle the lyra. 1. System fan maintenance the system fan needs to be cleaned once a year to ensure that...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 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, d...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 4. The front panel pcb (4) this pcb contains analogue in/output 7 and digital in/output 7 as well as the studio headphones and burr brown ina163 microphone input pre amplifiers. The samplerate converter (cs842...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 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 volt...
Page 8: 7. Disassembling The Lyra
Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 7. Disassembling the lyra to disassemble the lyra you need the following tools: • a philips type screwdriver • a 1/4” spanner for the sub-d connector screws. A 5.5 mm spanner will also work. • a 14mm spanner f...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl.
Page 10
Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 3. Step 3 (removing the digital in/output pcb) to remove the digital in/output you need to remove three screws. On later models the power connection is soldered to the molex connectors to ensure proper connect...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 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..
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 5. Step 5 (removing the front panel pcb) to remove the front panel pcb you need to remove three screws on the inside and several on the outside. For the screws you will need a pozi drive screwdriver. To remove...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl 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. Lyr...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl from 9 december 2005: 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 in...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl v1.0.0.3: 18 may 2004. • peak led now works. The peak led will go on when the level reaches 17dbfs (3db below fullscale). • fixed bug regarding encoder 5 (in an 8 fader control surface).Pushing the encoder but...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl • fixed slowdown when cobranet cm-2 module installed. • setipaddress function corrected for cobranet cm-1 module. • snmp read/write communities are read and saved correctly. For this to work correctly you will...
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Index lyra maintenance manual. D&r electronica weesp b.V. Tel. +31 294 418041. Info@d-r.Nl v1.1: 18 june 2004. • fclk_cobranet is inverted after the pll to remove sample timing difference between channel 1/2,3/4 and 5/6,7/8. V1.2: 15 oct 2004. • cobranet audio data 4x2 channels instead of 4x4 channe...