D&R Lyra Maintenance Manual Download

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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 voltages present on the Core

PCB.
+5V: All other voltages are derived from

this voltage. Also the onboard PLL uses

this voltage.
+3.3V: Used by the FPGA, DSP, memory

etc…
+1.5V: Used only by the FPGA.
+1.2V: Used only by the DSP.

2. The Digital in/output PCB voltages

Summary of Contents for Lyra

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...