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Index

Lyra Maintenance Manual. D&R Electronica Weesp B.V. tel. +31 294 418041.

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.

Three screws at the left side, three at the right side and three at the top:

Содержание Lyra

Страница 1: ...Manual version V1 0 5 Juli 2006...

Страница 2: ...Analogue in output PCB 3 6 4 The Front panel PCB 4 7 5 The Power supply 5 7 6 Measuring the Voltages inside the Lyra 8 1 The Core PCB Voltages 8 2 The Digital in output PCB voltages 8 7 Disassembling...

Страница 3: ...edures 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 cov...

Страница 4: ...on the production date of your Lyra screws with which the Fan is mounted in the casing If the bearings of the Fan wear out the Fan will start to become more and more noisy When this happens the Fan s...

Страница 5: ...inputs have individual Crystal CS8420 sample rate converters and have transformers on the in and outputs This PCB also serves as distribution board for all the clock signals as well as distributing t...

Страница 6: ...igital in output 7 is located on this board The Phantom power 48V is generated locally How and where to measure these voltages is explained elsewhere in this manual 5 The Power supply 5 The Power supp...

Страница 7: ...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 5V All other voltages are derived from this voltage...

Страница 8: ...h dissipates static electricity If you do not have these facility s to countermeasure static discharges then it is not recommended that you disassemble the Lyra Failure to observe ESD regulations will...

Страница 9: ...Index Lyra Maintenance Manual D R Electronica Weesp B V tel 31 294 418041 info d r nl...

Страница 10: ...in output you need to remove three screws On later models the Power connection is soldered to the Molex connectors to ensure proper connection You will then need to place the PCB to the side Revision...

Страница 11: ...al 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...

Страница 12: ...ws on the inside and several on the outside For the screws you will need a pozi drive screwdriver To remove the pot meter nuts you will need a 11mm spanner Also you will need a Allen wrench when you w...

Страница 13: ...d more resistive This results in a voltage drop over the connector which leads to an unstable Lyra Lyra DIG PCB revision B the Molex connectors are replaced by PCB terminal blocks From 6 June 2005 Rem...

Страница 14: ...V that the DC DC NMT0572 converter uses to make 48V higher This gives a higher output at the DC DC converter 48V in stead of 40V or less From 17 March 2006 Change R297 and R298 from 10KOhms to 100KOhm...

Страница 15: ...MfgID and ProdID Snapshot format changed Previously saved snapshots do not work anymore V1 0 0 6 1 March 2005 Fixed error in FTP transfer which resulted in 0 Byte files size when trying to save Snaps...

Страница 16: ...urface now show the correct level meter data was truncated not rounded Meters on the control surface now receive and update after booting This to show the level even when a constant signal is applied...

Страница 17: ...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 channels...