Lexicon CORE2 Service Manual Download Page 14

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Lexicon Studio Core2 Service Manual

4-2

IMPORTANT: The LexPanel MUST be the focused (active) application in order for any
audio to pass through the Core2 hardware.

Clock Source Page:

The Clock Source page is used for selecting the internal Sample Rate and audio Clock Source.
The example below shows

44100Hz

selected as the Sample Rate and

Internal

selected as the Clock

Source.

Summary of Contents for CORE2

Page 1: ...Lexicon Studio Core2 Desktop Audio System Service Manual ...

Page 2: ...rvice Manual Copyright 1999 Lexicon Inc All Rights Reserved Lexicon Inc 3 Oak Park Bedford MA 01730 1441 Tel 781 280 0300 Customer Service Fax 781 280 0499 Lexicon Part 070 14394 Rev 0 Printed in the United States of America ...

Page 3: ...Lexicon ...

Page 4: ...Lexicon Studio Core2 Service Manual ...

Page 5: ... Digital In To Analog Out Frequency Test 4 7 THD N Measurement 4 8 Analog In To Digital Out THD N Test 4 8 Digital In To Analog Out THD N Test 4 9 Crosstalk Tests 4 9 Analog In To Digital Out Crosstalk Test 4 9 Digital In To Analog Out Crosstalk Test 4 10 Dynamic Range Tests 4 10 Analog In To Digital Out Dynamic Range Test 4 10 Digital In To Analog Out Signal to Noise Test 4 11 DBX THD N Tests 4 1...

Page 6: ...Expansion Port Memory Map AA0 chip select 48K 44 1K mode 6 4 DSP 56301 Expansion Port Memory Map AA0 chip select 96K 88 2K mode 1 6 4 DSP 56301 Expansion Port Memory Map AA0 chip select 96K 88 2K mode 2 6 4 DSP 56301 Expansion Port Memory Map AA0 chip select 96K 88 2K mode 3 6 5 DSP 56301 ESSI Ports 6 5 DSP 56301 ESSI Port C Register 6 5 DSP 56301 ESSI Port D Register 6 5 XCS10 FPGA schematic shee...

Page 7: ...m CPU of at least 200Mhz 64meg memory Windows95 A monitor keyboard and mouse Lexicon Studio Core2 system consisting of a Core2 PCI card Connector Box and the proprietary Lexicon cable to connect the Core2 and Connector Box provided with the system Amplifier with speakers or headphones At least the following to perform the minimum I O tests as signal source 1 CD player with both analog and digital ...

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Page 9: ...cepted without Return Authorization from Lexicon If Lexicon recommends that a Lexicon Studio Core2 be returned for repair and you choose to return the unit to Lexicon for service Lexicon assumes no responsibility for the unit in shipment from the customer to the factory whether the unit is in or out of warranty All shipments must be well packed using the original packing materials if possible prop...

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Page 11: ... 20Hz to 20kHz 1dB ref 1 kHz Crosstalk 96 dB 1 kHz THD 0 005 20 Hz to 20 kHz Resolution 24 Bits Delta Sigma Conversion Digital Audio Interface Input Connectors Coaxial RCA 24 bit S PDIF or TTL Word Clock Optical 24 bit S PDIF or 24 bit ADAT Output Connectors Coaxial RCA 24 bit S PDIF Optical 24 bit S PDIF or 24 bit ADAT Sample Rates 44 1 kHz 48 kHz Word Clock Sources ADAT S PDIF external TTL Word ...

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Page 13: ...rcuit can be located and repaired User Interface The LexPanel consists of three pages that are used for selecting the Audio Inputs Audio Outputs Sample Rate Clock Source etc Double clicking on the LexPanel Icon in the lower right hand section of the task bar can access these pages Each tab of the LexPanel can be accessed by using the mouse or via the function keys F5 F6 F7 F5 is for the Punch page...

Page 14: ...tive application in order for any audio to pass through the Core2 hardware Clock Source Page The Clock Source page is used for selecting the internal Sample Rate and audio Clock Source The example below shows 44100Hz selected as the Sample Rate and Internal selected as the Clock Source ...

Page 15: ...ove is also used for changing the settings of the Analog Input Level faders There are four LED s labeled dbx 1 4 located at the lower right of the LexPanel that are used to monitor the status of the jumpers W1 W8 on the Core2 Main board All of the following tests are specified with the dbx circuits enabled and the jumpers installed at W5 8 OFF Dark Green dbx Disabled ON Bright Green dbx Enabled ...

Page 16: ... the audio source CD player DAT or effects box Analog Output to the Analog Input marked 1 on the Core2 Connector Box 2 The digital output marked S PDIF of the Core2 Connector Box needs to be connected to a device for D A conversion back to an analog signal Configure the device for Coax S PDIF 3 Connect the analog output of the D A to your amplifier with speaker or headphone output Be sure to turn ...

Page 17: ...ut 14 Using optical cables connect the Optical Out on the back of the Core2 card to the D A for conversion back to an analog signal as stated in Step 2 above Configure the device for Optical S PDIF 15 In the Routing area activate the Optical S PDIF In and S PDIF Out by checking the Optical box 16 Repeat step 11 to test audio quality Digital Input To Analog Output Listening Test 1 Connect the audio...

Page 18: ...g Inputs move the input cable from the 1 analog input to each of the remaining inputs 2 4 and test for the audio spec as described above 12 The above test needs to be repeated for the S PDIF Optical output connection of the Core2 13 Disconnect the Coax S PDIF Output 14 Using optical cable connect the Optical Output on the back of the Core2 card to the Digital Distortion Analyzer as stated in Step ...

Page 19: ... the Clock Source menu select Internal and set the Sample Rate to 44100 7 Click on the Punch tab to bring it forward To enable your Input Source and Output Destinations selected from the Core2 tab make sure the enable punch check box is selected it will have a check in the box if enabled 8 Hold the CTRL key down on the computer keypad then in the Sources menu select all A D inputs 1 4 9 Hold the C...

Page 20: ...est These tests check the THD N of the analog input to digital output path 1 Connect the Analog Low Distortion Oscillator to the Analog Input marked 1 on the Core2 Connector Box 2 Connect the digital output marked S PDIF on the Core2 Connector Box to the Digital Distortion Analyzer set to measure THD N 3 Open the LexPanel by double clicking on the Lexicon Studio Icon 4 Click on the Core2 tab to br...

Page 21: ...ad then in the Sources menu select S PDIF In L and S PDIF In R 10 Hold the CTRL key down and select all the D A outputs 1 8 in the Destinations menu 11 Sweep the Oscillator from 20Hz to 20kHz and verify the analog output is 005 12 To test the remaining Outputs move the output cable from the 1 analog output to each of the remaining outputs 2 8 test for the audio spec as described above 13 The above...

Page 22: ...k on the Apply button if it is flashing There is no need to click the Apply button if it is not flashing 7 Click on the Clock Source tab to bring it forward In the Clock Source menu select S PDIF 8 Click on the Punch tab to bring it forward To enable your Input Source and Output Destinations selected from the Core2 tab make sure the enable punch check box is selected it will have a check in the bo...

Page 23: ...re2 Connector Box to the Analog Distortion Analyzer 3 On the Analyzer engage the 20Hz to 20kHz audio bandpass filters 4 Open the LexPanel by double clicking on the Lexicon Studio Icon 5 Click on the Core2 tab to bring it forward In the Routing area activate the S PDIF In Analog Outputs 1 4 and Output 5 8 buttons by clicking on each of them If Optical is enabled checked disable it 6 To activate you...

Page 24: ... bring it forward To enable your Input Source and Output Destinations selected from the Core2 tab make sure the enable punch check box is selected it will have a check in the box if enabled 8 Hold the CTRL key down on the computer keypad then in the Sources menu Select all A D inputs 1 4 9 Hold the CTRL key down and select S PDIF Out L and S PDIF Out R in the Destinations menu 10 Verify the digita...

Page 25: ... 0 25 OFF OFF 4 OFF 22 OP4 OP1 44 1kHz Int A D Input Level Control Tests AD_44_IN1_SPDIF_COAX_INLVL_CUT AD_44_SPDIF_COAX_INLVL_CUT_UPPER AD_44_SPDIF_COAX_INLVL_CUT_LOWER AD_44_IN1_SPDIF_COAX_INLVL_CUT 8 00dBv Gnd 997 dBFS Amplitude 20 00 18 94 21 06 OFF OFF 1 OFF 20 CX6 OP1 44 1kHz Int AD_44_IN2_SPDIF_COAX_INLVL_CUT AD_44_SPDIF_COAX_INLVL_CUT_UPPER AD_44_SPDIF_COAX_INLVL_CUT_LOWER AD_44_IN2_SPDIF_...

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Page 27: ...IRQ again If you are unable to get Lexicon onto its own IRQ give Lexicon Tech Support a call at 781 280 0300 or email csupport lexicon com 2 Go to the Start Menu Select settings Control Panel Double click on MultiMedia Go to the devices tab Advanced if using Windows 95 Look under audio devices Double click on Audio for Lexicon Studio Wave Device Check the status It should say drivers enabled and a...

Page 28: ...Y_LOCAL_MACHINE 9 Click on the box next to ENUM 10 Then click on the box next to PCI 11 Look for VEN_1057 DEV_1801 Highlight this folder and delete it 12 Next still under HKEY_LOCAL_MACHINE go down and click on the box next to SYSTEM 13 Then click on the box next to CURRENTCONTROLSET 14 Then click on the box next to SERVICES 15 Then click on the box next to CLASS 16 Then click on the box next to M...

Page 29: ...re2 sharing IRQ or no resources assigned Change BIOS Problem Core2 does not get an IRQ assigned to it Get message Core32 not installed or not working properly Solution Download and install C2V120P3 exe patch from the Support Downloads area of the Lexicon web site http www lexicon com downloads studio_download htm c2v120p3 Don t forget to download and read C2V120P3 instructions txt Installation ins...

Page 30: ...ed with an Internal clock source will cause a warning message to appear NOTE clock source warning message will appear based on the currently open input channels regardless of which channels are currently routed an open input channel is a channel playing audio When the monitor button is active however all routed channels are open and not just those channels selected for punch Therefore you might re...

Page 31: ...g levels in these text boxes or use the faders on the panel instead Addendum 4 LEVEL ON EXTERNAL OUTPUT WHEN CLOSING LEXPANEL Sometimes when closing the LexPanel you may notice constantly high level of an inaudible DC signal on S PDIF input of your digital mixer To eliminate this DC signal send audio to the S PDIF output or close the LexPanel Addendum 5 ROUTING IN CUBASE When a song or arrangement...

Page 32: ...actice to verify that the identical setting is selected in the LexPanel clock source tab at that time Any differences in these settings could result in undesirable static If such a condition should occur simply invoke the LexPanel from the task bar and Lexicon Studio will internally correct this problem Addendum 8 THE EFFECT OF ROUTING CHANGES ON WAVE DRIVERS If you are using the Wave drivers and ...

Page 33: ...t occasionally the first output bus can be out of alignment with the rest of the output buses in Acid and Cool Edit Pro This seems to be setting related adjusting the number and size of the audio playback buffers can help fix the problem Another work around is to put 2 dummy tracks at the top of your arrangement and assign them to some outputs that you are not using Addendum 12 NOISES THAT OCCUR A...

Page 34: ... to ASIO Lexicon Studio v4 20 for the Core32 Page 17 Change Punch from the LSI 10T A D 1 2 to LDI 10T D A 1 2 to Punch from the Core2 A D 1 2 to Core2 D A 1 2 Page 18 Figure does not accurately represent Clock Source Tab V1 20 P1 Update Recent Core2 Update V120 p1 exe http www lexicon com downloads studio_download htm Core2SP1 The current update is an improvement that addresses Addendum 7 CLOCK SO...

Page 35: ...s Inf Other 4 Restart computer and re install drivers DO NOT RESTART after running the Setup program 5 Unzip the update patch it should go to C Lxstudio 6 Restart the computer C2V120P2 reg Update http www lexicon com downloads studio_download htm Core2SP2 Once downloaded follow these instructions 1 Move C2V120P2 reg to your desktop 2 Double click on icon and let it run 3 Restart your computer The ...

Page 36: ... remedy is to invoke CLOSE PROGRAM by pressing Cntrl Alt Delete simultaneously on the keyboard Next select Lexpanel and click on end task LexPanel is now ready to be launched from the task bar However you must remember that if you are in ASIO mode it is best to launch LexPanel from the Cubase system dialog This technique will help to ensure proper LexPanel operation ...

Page 37: ...and the A D converters D A converters and the FPGA The Xilinx FPGA is used to implement 8 channels of ADAT I O and stereo S PDIF I O It is also used to create an I2S receiver interface from the MP 100 reverb daughter board The A D conversion section is comprised of two stereo A D converters AK5383 two stereo volume control I C s CS3310 and dBx type 4 tape saturation emulation DBx type 4 is a soft ...

Page 38: ...A AK4324 MP100 Effects Input Level Control CS3310 DBX Type 4 PLL A D AK5383 96K S s 24bits CH 1 CH 2 DBX Type 4 Analog In CH 1 Analog Out CH 2 AD_CH12 AD_CH34 DA_CH12 SDATA DA_CH34 DA_CH56 DA_CH78 SampleClk RefClk MasterClk DSP BOOT ROM AD_CH12 SDATA L R L R ADAT or SPDIF SPDIF RCA IN SPDIF RCA OUT ADAT IN ADAT OUT ...

Page 39: ...ent or a 3 3V PCI signaling environment This is accomplished by providing the PCI I O power pins to the 56301 on a dedicated voltage clamp pin pin 137 The DSP 56301 integrates a 6 channel DMA controller that performs memory to memory including memory mapped peripherals transfers in parallel with other DSP operations Some of these channels are used to move samples between the PCI FIFOs to the DSP s...

Page 40: ...AT Channel 2 DMA only AA0 100000 100002 ADAT Channel 1 DMA only DSP 56301 Expansion Port Memory Map AA0 chip select 96K 88 2K mode 1 Chip Select Address Resource AA0 100021 100023 SPDIF Right Channel DMA only AA0 10001E 100020 SPDIF Left Channel DMA only AA0 10001B 10001D Reverb Right Channel DMA only AA0 100018 10001A Reverb Left Channel DMA only AA0 100009 10000B ADAT Channel 4 DMA only AA0 1000...

Page 41: ...ut 5 DA_CH12 DAC channels 1 2 Output DSP 56301 ESSI Port D Register Port Bit Number Signal Name Function In Out Active State 0 LEX_DIN Reverb daughterboard I2S signal Output 1 DA_CH78 DAC channels 7 8 Output 2 ESSI1_SYNC ESSI port 1 frame sync Input high 3 ESSI1_CLK Shift clock for ESSI 1 port Input 4 AD_CH34 ADC channels 3 4 Input 5 DA_CH34 DAC channels 3 4 Output XCS10 FPGA schematic sheet 2 The...

Page 42: ... DMA_RESET reset for the FPGA DMA control state machine High 0 SMUTE DAC mute signal for channels 1 8 High System Control Register 1 Register Bit Number Signal Name Function Active State 7 SPDIF conn Select high RCA low opto 6 Opto out mux high SPDIF low ADAT 5 Volume xmit 3 4 channels 3 4 volume control shift out enable high 4 Volume xmit 1 2 channels 1 2 volume control shift out enable high 3 DI...

Page 43: ...d 3 32 KHz 2 48 KHz 1 Not used 0 44 1 KHz Sample Clock Phase Locked Loop schematic sheet 3 The TLC2932 PLL I C U30 is used to create a 256FS sample clock that is synchronized with an audio word clock that may be derived from a number of sources These sources are multiplexed in the FPGA and sent to the PLL as the SAMP_REF signal The INT_REF signal is the VCO256 signal divided by 256 The PLL loop fi...

Page 44: ...01 to detect the position of the jumper When the jumper is in the IN position the dual diode packs D1 and D2 are used to create the soft knee compression When the signal is sufficiently large D2 and R85 shape the positive excursions while D1 and R84 shape the negative excursions U13 is an inverting stage that provides a summing node for the dBx type 4 function At this point the signal is AC couple...

Page 45: ... OHM 1 00 R144 203 10583 RESSM RO 1 1 10W 10 0K OHM 10 00 R92 101 203 10895 RESSM RO 1 1 10W 681 OHM 4 00 R80 83 203 11075 RESSM RO 1 1 10W 95 3 OHM 1 00 R113 203 11080 RESSM RO 1 1 10W 1 15K OHM 8 00 R72 79 203 11082 RESSM RO 1 1 10W 15 0K OHM 16 00 R19 20 24 27 31 32 R36 39 43 44 48 51 R55 56 60 63 203 11724 RESSM RO 1 1 10W 150 OHM 16 00 R1 8 102 109 203 11726 RESSM RO 1 1 10W 301 OHM 1 00 R114...

Page 46: ...CSM LIN CS3310 VOL CTL SOIC 2 00 U3 4 340 11573 ICSM LIN NJM4580 DUALOPAMP SOP10 00 U1 2 5 8 13 16 340 11575 ICSM LIN 7805 5V REG TO263 1 00 U20 340 12061 ICSM LIN TLC2932 PLL SSOIC 1 00 U30 340 12062 ICSM LIN LM3940 5 3V REG TO263 1 00 U26 340 13843 ICSM LIN 79L05A 5V REG SO 8 1 00 U19 346 12072 ICSM SS SWITCH QS3245 QSOP 2 00 U21 25 350 13834 ICSM FPGA XCS10 14X14 PLCC 1 00 U27 350 13846 ICSM RO...

Page 47: ...38 LABEL S N CHASSIS PRINTED 1 00 BOTTOM PLATE CORE 2 CONNECTOR BD PC BOARD ASSEMBLY PART NO DESCRIPTION QTY REFERENCE 510 12348 CONN DB25FG PCRA 4 40SCRWLK 1 00 J8 510 13149 CONN RCA PCRA 1FCGX2V WH RED G1 00 J7 510 13847 1 4 PH JACK VERTX2 STER 5 SP 6 00 J1 6 710 13730 PC BD CONN CORE2 1 00 CORE 2 SHIPPING MATERIAL PART NO DESCRIPTION QTY REFERENCE 730 13732 FLYER UPG COOL EDIT PRO 1 00 740 0317...

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Page 49: ... and D rawings Schematics 060 13719 SCHEM MAIN BD CORE2 060 13739 SCHEM CONN BD CORE2 Drawings 080 13718 PC ASSY DWG MAIN BD CORE2 080 13738 PC ASSY DWG CONN BD CORE2 080 13744 ASSY DWG CHASSIS CORE2 080 13747 ASSY DWG SHIPMENT CORE2 ...

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Page 86: ...Lexicon Inc 3 Oak Park Bedford MA 01730 1441 Tel 781 280 0300 Customer Service Fax 781 280 0499 Email csupport lexicon com www lexicon com Lexicon Part No 070 14394 Rev 0 Printed in U S A ...

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