background image

The lightning flash with arrowhead symbol, within an equi-

lateral triangle is intended to alert the user to the presence

of uninsulated “dangerous voltage” within the product’s

enclosure that may be of sufficient magnitude to constitute

a risk of electric shock to persons.

The exclamation point within an equilateral triangle is

intended to alert the user to the presence of important

operating and maintance (servicing) instructions in the

literature accompanying the appliance.

IMPORTANT SAFETY INSTRUCTIONS

1. 

Read these instructions.

2. 

Keep these instructions. 

3. 

Heed all warnings.

4.

Follow all instructions.

5. 

Do not use this apparatus near water.

6.

Clean only with a damp cloth.

7. 

Do not block any of the ventilation openings. 
Install in accordance with the manufactures instructions.

8.

Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.

9.

Only use attachments/accessories specified by the manufacturer.

10.  

Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen
into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has 
been dropped.

For US and CANADA only:

Do not defeat the safety purpose of the grounding-type plug. A grounding type plug has two blades and a third grounding prong.
The wide blade or the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult an
electrican for replacement of the absolete outlet.

1. Security regulations as stated in the EN 60065 (VDE 0860 / IEC 65) and the CSA E65 - 94 have to be obeyed when 

servicing the appliance.

2. Use of a mains separator transformer is mandatory during maintenance while the appliance is opened, needs  to be 

operated and is connected to the mains

3. Switch off the power before retrofitting any extensions, changing the mains voltage or the output voltage.
4. The  minimum distance between parts carrying mains voltage and any accessible metal piece (metal enclosure),

respectively between the mains poles has to be 

3 mm

 and needs to be minded at all times.

The  minimum distance between parts carrying mains voltage and any switches or breakers that are not connected 
to the mains (secondary parts) has to be 

6 mm

 and needs to be minded at all times.

5. Replacing special components that are marked in the circuit diagram using the security symbol (Note) is only permissible

when using original parts.

6. Altering the circuitry without prior consent or advice is not legitimate.
7. Any work security regulations that are applicable at the location where the appliance is being serviced have to be strictly

obeyed. This applies also to any regulations about the work place itself.

8. All instructions concerning the handling of 

MOS

 - circuits have to be observed.

Note:

  

  

SAFETY COMPONENT  (HAS TO BE REPLACED WITH ORIGINAL PART ONLY)

IMPORTANT SERVICE INSTRUCTIONS

CAUTION:  These servicing instructions are for use by qualified personnel only. To reduce the

risk of electric shock, do not perform any servicing other than that contained in the 
Operating Instructions unless you are qualified to do so. Refer all servicing to 
qualified service personnel.

1-2

Summary of Contents for Dx38

Page 1: ...Dx 38 24 BIT DIGITAL SOUND SYSTEM PROCESSOR SERVICE MANUAL...

Page 2: ...Product repair or replacement and return to the customer are the only remedies provided to the customer Electro Voice shall not be liable for any incidental or consequential damages including without...

Page 3: ...ty Architects and engineers specifications Measuring data Bill of materials Service notes infos instructions Spare parts plan Circuit diagrams Electro Voice 600 Cecil Street Buchanan Michigan 49107 Ph...

Page 4: ...into your outlet consult an electrican for replacement of the absolete outlet 1 Security regulations as stated in the EN 60065 VDE 0860 IEC 65 and the CSA E65 94 have to be obeyed when servicing the a...

Page 5: ...ignalprozessoren DESCRIPTION Providing 48 bit filter algorithms 24 bit AD DA conversion and a dynamic range of 115 dB the Dx 38 sets new standards for digital loudspeaker controllers and processors Th...

Page 6: ...ts m moire 50 pour les Programmes Presets d usine et 30 pour les Programmes utilisateur l int rieur du Dx 38 les conversions A N et N A s effectuent en 24 bits lin aires Delta Sigma sur chantillonnage...

Page 7: ......

Page 8: ...g Frequency 192 kHz 2 Inputs 2 x XLR IN electronically balanced 2 x XLR Direct Out Input transformers NRS 90244 are optionally available 2 1 Input Impedance electronically balanced 20 k 2 2 Input Volt...

Page 9: ...6 mm x 374 mm 10 2 Installation Depth Without Connectors 356 mm 10 3 Installation Depth Incl Connectors approx 430 mm 10 4 Weight 5 kg 10 5 Weight with 2x NRS 90244 5 2 kg 11 Standards 11 1 Safety Cl...

Page 10: ...to their clockwise margin 5 measured with service program ORIGINAL THRU level 0 dB all controls set to their clockwise margin measurement via bandpass filter 22 Hz 22 kHz weighting filter set to 20 kH...

Page 11: ...0 dBu with input transformer NRS 90244 installed 04 19 99 17 01 22 THD N vs Level 0 002 1 0 005 0 01 0 02 0 05 0 1 0 2 0 5 40 25 35 30 25 20 15 10 5 0 5 10 15 20 dBu 04 20 99 08 53 11 THD N vs Frequen...

Page 12: ...rmer 0 05 Frequency crossovers 6 12 18 24 dB oct slope Butterworth Bessel Linkwitz Riley Filters 26 parametric equalizers Low Shelving equalizer LPN Lowpass Notch switchable Hi Shelving equalizer 6 12...

Page 13: ...P ROM TEST P RAM TEST EEPROM TEST KEY TEST ENCODER TEST LED TEST DISPLAY TEST RS232 TEST RS485 TEST CONTACT P TEST MIDI TEST DSP RAM TEST HW CONN TEST ORIGINAL THRU SINE WAVE OUT PINK NOISE WHITE NOIS...

Page 14: ...orrupted during the internal reading in the UART IC1 or at the external bridging plug RS 485 TEST The optional RS 485 interface gets tested by sending and reading back data If no error has been detect...

Page 15: ...CAUTION The use of this program should be left to the experienced and well educated service technician Inaccurate calibration can result in the degradation of the dynamic range or even in erroneous fu...

Page 16: ...e Testing The P System During Power On During switching on the unit or performing a hardware reset the indication of the status LEDs D101 and D102 located on the Digital PCB 80449 lets you localize a...

Page 17: ......

Page 18: ...8 EEPROM LCD 122 x 32 DOTS LEDs LEVEL METER KEYBOARD ROTARY ENCODER I O SPI SPI AUDIO CONTROL UART OUT 1 OUT 2 OUT 4 OUT 3 GAINRANGING 24 BIT ADC GAINRANGING 24 BIT ADC IN 1 LEFT MONO IN 2 RIGHT INPUT...

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Page 30: ...LLE 500X700X0 05 poly bag 357961 DAT BLATT EDS DX 38 eds dx38 356216 FB DX 38 BED front panel dx38 356466 BLEND DX38 DSP244 BED panel sub 356218 DEC DX 38 BED cover chassis Platinen printed circuit b...

Page 31: ...56508 KO KER 0 10MF 50V 20 cap ceramic 100nF C0203 301530 KO KER 100 0PF 500V 10 cap ceramic 100pF C0204 301530 KO KER 100 0PF 500V 10 cap ceramic 100pF C0205 301530 KO KER 100 0PF 500V 10 cap ceramic...

Page 32: ...5 C0353 356508 KO KER 0 10MF 50V 20 cap ceramic 100nF C0354 356508 KO KER 0 10MF 50V 20 cap ceramic 100nF C0355 340522 KO EL 10 000MF 35V cap electrolytic 10uF 35 C0356 356508 KO KER 0 10MF 50V 20 cap...

Page 33: ...517 301530 KO KER 100 0PF 500V 10 cap ceramic 100pF C0518 343533 KO EL 220 000MF 25V cap electrolytic 220uF 25V C0519 343533 KO EL 220 000MF 25V cap electrolytic 220uF 25V C0520 356508 KO KER 0 10MF 5...

Page 34: ...021 KO KER 0 10MF 100V 20 cap ceramic 100nF C0710 329021 KO KER 0 10MF 100V 20 cap ceramic 100nF C0711 329021 KO KER 0 10MF 100V 20 cap ceramic 100nF C0712 340522 KO EL 10 000MF 35V cap electrolytic 1...

Page 35: ...KO SO MTB 271 KB FILTER safety component FL302 346765 KO SO MTB 271 KB FILTER safety component FL401 346765 KO SO MTB 271 KB FILTER safety component FL402 346765 KO SO MTB 271 KB FILTER safety compon...

Page 36: ...00UH 1 10A inductor 47uH 1 1A L0801 339139 FERRITPERLE EXC ELDR35C coil L0802 339139 FERRITPERLE EXC ELDR35C coil L0803 339139 FERRITPERLE EXC ELDR35C coil L0804 339139 FERRITPERLE EXC ELDR35C coil L...

Page 37: ...4004 LED GN 3MM LOW CURRENT led green D0010 354004 LED GN 3MM LOW CURRENT led green D0011 354004 LED GN 3MM LOW CURRENT led green D0012 354004 LED GN 3MM LOW CURRENT led green LCD01 356588 DISPLAY LCD...

Page 38: ...LED RT 3MM TLUR 4401 LED red 3mm D0059 336399 LED RT 3MM TLUR 4401 LED red 3mm S0020 348874 SCHALTER TAST 1XEIN SW switch push momentary spst S0021 348874 SCHALTER TAST 1XEIN SW switch push momentary...

Page 39: ...100nF C0008 329021 KO KER 0 10MF 100V 20 cap ceramic 100nF C0009 329021 KO KER 0 10MF 100V 20 cap ceramic 100nF C0010 329021 KO KER 0 10MF 100V 20 cap ceramic 100nF C0011 329021 KO KER 0 10MF 100V 20...

Page 40: ...nung Description JS001 354555 BUCHSE FL XLR 3POL connector xlr female 3 pole JS002 351816 STECKER FL XLR 3POL PRINTB xlr connector male 3 pin X0001 354376 QUARZ 3 6864MHZ HC 49 U crystal 3 6864 mhz No...

Page 41: ...ceramic 100nF C0004 329021 KO KER 0 10MF 100V 20 cap ceramic 100nF C0005 329021 KO KER 0 10MF 100V 20 cap ceramic 100nF C0006 343532 KO EL 100 000MF 25V cap electrolytic 100uF 25V C0007 340523 KO EL 2...

Page 42: ...t number 357007 If the seria lnumber on your Dx38 is lower than 11099 you have to replace the old cable harness by the provided cable harness see drawing By checking the colours of the cables you can...

Page 43: ...ice mode of the DX38 Press the SELECT button to the right side and the EDIT button simultaneously while switching power on The unit will start in SERVICE MODE Step through test menu with the SELECT bu...

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