Electro-Voice Dx 38 Service Manual
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Electro-Voice Dx 38 Service Manual

24 bit digital sound system processor
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SERVICE MANUAL
Dx 38
24 BIT DIGITAL SOUND SYSTEM PROCESSOR

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Summary of Contents for Electro-Voice Dx 38

  • Page 1 SERVICE MANUAL Dx 38 24 BIT DIGITAL SOUND SYSTEM PROCESSOR...
  • Page 2 (d): malfunction resulting from misuse or abuse of the product; or (e): malfunction occurring at any time after repairs have been made to the product by anyone other than Electro-Voice or any of its authorized service representatives.
  • Page 3 - Warranty - 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 Phone 616/695-6831 Fax 616/695-1304 e-mail fspain@qtm.net...

  • Page 4: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS 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...

  • Page 5: Architects And Engineers Specifications

    Providing 48-bit filter algorithms, 24-bit AD/DA conversion and a den Ausgängen sind neben den Frequenzweichen-Filtern jeweils 4 dynamic range of 115 dB, the Dx 38 sets new standards for digital weitere Filter enthalten, die ebenfalls als High- und Low-Pass Filter, loudspeaker controllers and processors.
  • Page 6 Within the Dx 38, AD/DA conversion is taken care of by linear 24-bit Parmi les autres caractéristiques : converters; where the AD-section employs 128 times oversampling, Mémoire FLASH pour le logiciel d’exploitation et les Presets, gain-ranging Sigma-Delta converters. The DA-section offers 128 times ce qui permet la mise à...
  • Page 8 Measuring data Dx 38 – complete device Power Supply Operation Voltage 90 - 250 V AC, 50 - 60 Hz Mains Operation Current at U = 110 V AC 200 mA Mains at U = 230 V AC 130 mA...
  • Page 9 Distortion THD+N [4] fig. 2 , fig. 3 20 Hz ... 20 kHz < 0.01 % @ +10 dBu Interference Voltages ≤ 50 µV = -84 dBu Wide Band Noise Voltage [5] ≤ 140 µV = -75 dBu Noise Voltage (CCIR 468-3) [6] ≤...
  • Page 10 13.2 Comments about measurements - Unless differently stated, all measurement has been performed at 20°C ± 2°C - All stated levels ± 1 dB all controls set to their clockwise margin Service program 'SINE WAVE OUT' , set a level of 0 dB, Output voltage = approx.
  • Page 11 T H D + N v s L e v e l 0 4 / 1 9 / 9 9 1 7 : 0 1 : 2 2 0.05 0.02 0.01 0.005 0.002 + 1 0 + 1 5 + 2 0 + 2 5 d B u Figure 2...
  • Page 12 Specifications Mains voltage 90 - 250 V AC / 50 - 60 Hz Power consumption 20 watts Safety class Inputs 2 x XLR IN, electronically balanced, transformer optional available 2 x XLR OUT (Direct Out) Input voltage (nominal) 1.55 V / + 6 dBu Max.
  • Page 13 Service Programs The Dx 38 provides several onboard service programs that allow testing internal function blocks. The service mode is entered by simultaneously pressing the ' EDIT ' and ' > ' keys while the unit is powered on. The display shows briefly: SERVICE MODE Selecting the service programs in sequence is possible by using the SELECT keys or via the rotary encoder.
  • Page 14 EEPROM TEST The EEPROM (IC105 on the 80449 Digital Board) is tested. If no error has been detected, the display shows ' OK '. If a faulty condition has been detected, the corresponding address or respectively the erroneously read data appear on the display. KEY TEST The function of all keys gets tested.
  • Page 15 Upon re-start the appliance is set to the factory program F01. CAUTION: To prevent the total loss of user-defined data, previously backing-up the contents of the user preset memory, using the Dx 38 editor software, onto a PC or notebook computer is strongly recommended.
  • Page 16 This program allows setting the appliance to the employed type of encoder. Changing the encoder type is only necessary when older models with serial numbers up to 11228 (Dx 38) are updated to a new operating system (V1.10 or newer). When shipped, the appliance is always correctly factory-set, matching the employed encoder type.
  • Page 18 DRAM 1M x 8 OUT 1 IN 1 LEFT OUTPUT 1 / MONO INPUT 1 OUT 2 GAINRANGING DUAL 24 BIT ADC 24 BIT DAC OUTPUT 2 24 BIT DIGITAL SIGNAL PROCESSOR OUT 3 IN 2 OUTPUT 3 RIGHT INPUT 2 OUT 4 GAINRANGING DUAL...
  • Page 30 Z0060 300425 KABEL-NETZ 2.0 M 10A power cable Europe 354617 KABEL-NETZ UL/CSA 15A/125V power cable US Z0070 357653 * ZUBEHÖR: SOFTWARE DX 38 software dx38 Z0080 356958 KABEL-SCHNITTSTELLE cable interface Mechanische Teile Metal work 337059 KNOPF-TASTE 12X7 SW 3.3...
  • Page 31 Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description C0111 340988 KO-FOL 0.470MF 63V 5% cap mylar 470nF C0112 301524 KO-KER 47.0PF 500V 10% cap ceramic 47pF C0113 301524 KO-KER 47.0PF 500V 10% cap ceramic 47pF C0114 327365 KO-EL 47.000MF 25V BIP cap electr.
  • Page 32 Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description C0231 329021 KO-KER 0.10MF 100V 20% cap ceramic 100nF C0301 343532 KO-EL 100.000MF 25V cap electrolytic 100uF/25V C0302 343532 KO-EL 100.000MF 25V cap electrolytic 100uF/25V C0303 327568 KO-FOL 0.010MF 63V 5% cap mylar 10nF C0304 327568...
  • Page 33 Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description C0413 343530 KO-EL 47.000MF 50V cap electrolytic 47uF/50V C0414 301530 KO-KER 100.0PF 500V 10% cap ceramic 100pF C0415 301530 KO-KER 100.0PF 500V 10% cap ceramic 100pF C0416 301530 KO-KER 100.0PF 500V 10% cap ceramic 100pF C0417 301530...
  • Page 34 Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description C0606 327568 KO-FOL 0.010MF 63V 5% cap mylar 10nF C0607 326924 KO-FOL 2200.000PF 100V 5% cap mylar 2200pF C0608 326924 KO-FOL 2200.000PF 100V 5% cap mylar 2200pF C0609 343530 KO-EL 47.000MF 50V cap electrolytic 47uF/50V C0610...
  • Page 35 Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description D0107 301297 DIODE BAT 85 diode BAT 85 D0108 301297 DIODE BAT 85 diode BAT 85 D0110 301254 DIODE 1N 4148 AXIAL diode 1N 4148 D0111 301254 DIODE 1N 4148 AXIAL diode 1N 4148 D0112...
  • Page 36 VR501 348487 WI-TRI 4.70 KOHM LIN pot trim 4.7 kohm lin VR601 348487 WI-TRI 4.70 KOHM LIN pot trim 4.7 kohm lin 804568 PCB--*DX 38 pcb assy 80456 CN301 348676 STIFTLEISTE 3POL MLSS connector male 3-pin CN302 356505 MESSERLST. 26POL MICS 26...
  • Page 37 D0102 351469 LED RT 3MM LS 3369-EH led red X0201 348962 QUARZ-OSZIL. 12.2880MHZ crystal 12.288 mhz 862468 PCBSB*DX 38 pcb assy 86246 CN001 356505 MESSERLST. 26POL MICS 26 connector male 26-pin CN002 356504 FEDERLEISTE 20POL SL-120-TT connector female 20-pole CN003 345489 MESSERLST.
  • Page 38 Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description D0032 356502 LED GN 3MM LOW CURRENT led green D0033 356503 LED GE 3MM L-934 LYD led yellow D0034 356503 LED GE 3MM L-934 LYD led yellow D0035 356503 LED GE 3MM L-934 LYD led yellow D0036...
  • Page 39 Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description FL001 346765 KO-SO MTB 271 KB FILTER safety component FL002 346765 KO-SO MTB 271 KB FILTER safety component IC002 352105 IC MAX 232 CPE IC MAX 232 IC003 331913 IC MC 74 HC 04 N IC MC 74 HC 04 N X0001 354376...
  • Page 40 Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung 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 Notes: *1 please see service informations...
  • Page 41 Stücklisten - Bill of materials 112767 NRS 90247 RS-485 INTERFACE retrofit 90247 Pos. Nr. Best. Nr. Ref. No. Part. No. Bezeichnung Description Zubehör Accessories 334989 SCHRGEWF C M3 X 6-ST-H screw M3x6 336245 KRT. L 2100 160X88X64 carton 347529 SCHUTZBEUTEL 127X305 poly bag Mechanische Teile Metal work...

  • Page 42: Service Information

    Service Information January 2000 Replacing the power supply board on DX 38 The switching Power supply board has been changed to a new one with part 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).
  • Page 43 Service Information February 2000 Replacing the Data-Encoder on DX 38 If you have to replace the data-encoder, you have to use the old one ( part-# 354891 ) as long the serial number of your unit is below 11229. All units with serial numbers 11229 and higher use the new encoder ( part-# 357100 ).

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