Nexo NX242 Service Manual
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Nexo NX242 Service Manual

Digital tdcontroller
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NX242 Digital TDcontroller
Service Manual

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Summary of Contents for Nexo NX242

  • Page 1 NX242 Digital TDcontroller Service Manual...

  • Page 2: Important Safety Instructions

    FCC Rules, any changes or modifications to this equipment not expressly approved by 14) Refer all servicing to qualified service personnel. Servicing is required when the NEXO S.A. may cause, harmful interference and void the FCC authorization to apparatus has been damaged in any way, such as power-supply cord or plug is operate this equipment.

  • Page 3: Table Of Contents

    FOREWORD ..................................4 SAFETY INSTRUCTION ..............................4 HISTORY....................................5 MECHANICAL ISSUES ...............................6 ..............................6 EMOVING THE TOP PANEL PCB ................................6 EMOVING THE HARDWARE PROBLEM ON NX242 S.N. 3880 TO 4049....................7 ....................................7 BSTRACT ...............................7 ARDWARE CORRECTION HARDWARE FIX FOR THE NXTENSION-CAI AND THE NXTENSION-ES4............11 ....................................11 BSTRACT ..............................11...

  • Page 4: Foreword

    (see also p.4) NEXO TDcontrollers don’t provide a mean to switch off the unit from the front panel. As they are intended to be rack mounted the back panel is not accessible during use. Therefore it is left to the user to provide a disconnection mean readily operable.

  • Page 5: History

    ___________________________________________________________________________________________________ History Partlist PCB ref note Date V1.0 NX242 V1.8 initial NX242 V2.0 Minor points fixed for UL approval NEXO NX242 DIGITAL TDcontroller Service manual rev100606...

  • Page 6: Mechanical Issues

    Removing the top panel First be sure that the NX242 is disconnected from the mains. Wait 5 minutes to discharge the capacitors To remove the top panel; unscrew the 11 screws circled in red in the above drawing (POZIDRIVE screwdriver).

  • Page 7: Hardware Problem On Nx242 S.n. 3880 To 4049

    Crackles on the outputs patched on the A Input of the NX242 that can be very audible. Blinking of the Sense green LED even without amplifier connected. Please note that in case of emergency it is always possible to use the B input of the NX242 that does not present noise.
  • Page 8 Now have a closer look on the component U5401. This component has a traditional capacitor, that can be blue or orange soldered between the pin 2 and the pin 8, as you can see on the picture bellow. NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 9 Please note that the color of the capacitor has no importance. Now, please check the manufacturer of the U5401 component. From NX242 serial number 3200 to 3879, the component should be a Texas Instrument, and from serial number 3880 to 4049, the component should be a Philips.
  • Page 10 If you have a Texas component, you must have the capacitor between the pin 2 and the pin 8 of U5401. Once this operation is finished, replace the cover of the NX242, with all of the screws, as they are important for the shielding of the digital section of the controller.

  • Page 11: Hardware Fix For The Nxtension-Cai And The Nxtension-Es4

    The solution is to connect to a fixed potential a pin on the Nxtension board which was left floating. Hardware correction First and foremost, be sure to disconnect the NX242 from the mains before opening the top cover. Once the top cover of the NX242 is open, you can directly do the hardware correction on the Nxtension-board itself.
  • Page 12 Bellow is a side view of the soldering: a hard wire is the best solution has it will be less sensible to vibration. Once it is done, screw the cover back, and check that the NX is booting normally. Check that the audio is passing through without any problem. NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 13 P.13 ___________________________________________________________________________________________________ NEXO NX242 DIGITAL TDcontroller Service manual rev100606...

  • Page 14: Part List

    (PLL-SI 059 CASE3030) C2508 Capacitor, Thru Hole, ceramic class 2 rating=1000V, p=5,08mm tol 20% BC components - 2252 601 ..226 Capacitor, Thru Hole, Polyester MKT Film Capacitor p=22.5mm tol 10%, C2502 Vishay MKT1822-410-63 rating=630V NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 15 Socket connector Plug-in 130 series 6 poles, p=5mm Imo - Plugin 20.130/6 Pin Strip for socket connector Imo - Plugin 20.130/PS AWG16 (1.5mm²),600V, 105°C, Orange wire L=70mm, UL AVLV2 CAEDATA FDC-UL1007.16 [connecting CN0009 to mains switch] NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 16 C0028 C1625 C1626 C1627 C1628 Capacitor, SMD, COG dielectric, 0805/1206 size, tol= 5%, rating 25Vmini KEMET CxxxxC122JxGAC C2532 Capacitor, Thru Hole, ceramic low loss class 2 rating 1000V BC components 2252 601 ..116 NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 17 Capacitor, SMD; X7R dielectric, 1206 size, tolerance 5%, rating 50Vmini KEMET C1206C224J5RAC C5310 Capacitor, SMD; Y5V dielectric, 1206 size, tolerance 20%, rating 25V KEMET C1206C474M3VAC Capacitor, SMD, COG dielectric, 0805/1206 size, tol= 5%maxi, rating C5307 C5308 KEMET CxxxxC220J2GAC 25Vmini NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 18 BC components 2222 02134102 Capacitors NON CONNECTED Connectors 2.54mm x 2.54mm Box Header 3X2 contacts [link main board - RS232 CN5002 CN5003 E-TEC SLS-006-S920-11 board] Female connector 2.54mm 3x2 contacts [goes into CN5002 CN5003] E-TEC IDS-006-S100-01/P NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 19 Diode, TRANSIL, bidirectional, 18V SGS-THOMSON SM6T18CA D0016 D5001 D5002 Diode, TRISIL, bidirectional, 25V, 100A, Low capacitance SM6T33CA D0017 D0018 Diode, TRANSIL, unidirectional, 27V SGS-THOMSON SM6T27A D1409 D1410 Diode, Voltage regulator 3.3V Philips BZV55C3V3 NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 20 Motorola MC33078D U1903 current U1502 Operational Amplifier, Dual Low Power, Single Supply, case SO8 TEXAS INST. TLC082CD U1204 U1401 U1402 U1701 U1801 U1901 U2001 Operational Amplifier, High performance, Low noise, Dual, DIP8 NJM2114D NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 21 TST1201 TST1202 TST1601 TST1203 TST1204 TST1301 TST1302 TST1303 TST1401 TST1402 TST1403 TST1404 TST1602 TST1603 TST1604 Thru Hole Mount test point Multipupose (hole 1.6mm diam.) Keystone 5010 TST1605 TST2501 TST2502 TST2503 TST2504 TST2505 Resistors NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 22 R1628 R1629 R1630 Resistor Metal film, SMD, 1/4W, tol =1%, case 1206-0805 R2524 Resistor Metal film, SMD, 1/4W, tol =1%, case 1206-0805 3.92 Resistor Metal film, SMD, 1/4W, tol =1%, case 1206-0805 4.42 NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 23 R1205 R1206 R1305 R1306 R2504 R2515 Resistor Metal film, SMD, 1/4W, tol =1%, case 1206-0805 R1501 R1502 R1503 R1504 R1505 R1506 R1507 Resistor Metal film, SMD, 1/4W, tol =1%, case 1206-0805 1000 R1508 NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 24 Resistor Metal film, SMD, 1/4W, tol =1%, case 1206-0805 R1214 R1314 R1719 R1819 R1919 R2019 Resistor Metal film, SMD, 1/4W, tol =1%, case 1206-0805 R1213 R1313 R1718 R1818 R1918 R2018 Resistor Metal film, SMD, 1/4W, tol =1%, case 1206-0805 NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 25 Serrated lock, DIN6798A for M3 screws, externally thoothed. BOSSARD BN781 Material : spring steel, zinc plated. Hardness 350-425 HV. Screw, Socket button head cap, M3x5, ISO7380, property class 10.9, steel, Bossard BN19 Black (front panel, back panel) NEXO NX242 DIGITAL TDcontroller Service manual rev100606...

  • Page 26: Schematics

    CHB M4*8 (for Rack ears) Socket button head cap screws M3x5, ISO7380, property class 10.9, steel /// BOSSARD BN781 Screw M3*5 (PCB) Silk screen Painting rear panel SERCATT Front panel : two color complete Martin technologie Schematics NEXO NX242 DIGITAL TDcontroller Service manual rev100606...
  • Page 27 ME0013 ME0014 Z0003 Z0004 SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW TARGET TARGET NX242 TDcontroller (revision 1) ME0015 ME0002 ME0004 ME0006 ME0008 ME0010 Excem Client : Z0005 Z0006 NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S00.sch...
  • Page 28 Gain EN -22V in DigIO4 Gain A0 DigIO5 Gain A1 Out+ InRight+ DigIO6 Gain A2 OutRef InRight- NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S10.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 29 909 1% R1220 Z1201 BRIDGE +18V -18V +15V -15V +18V in -18V in +15V in -15V in NX242 TDcontroller (revision 1) C1207 C1208 C1209 C1210 Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S12.sch 78580 MAULE...
  • Page 30 150K 1% C1309 22UF 35V R1316 909 1% R1320 Z1301 BRIDGE +18V -18V +18V in -18V in NX242 TDcontroller (revision 1) C1307 C1308 Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S13.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 31 -15V in +5VA C1429 +5VA in C1427 C1428 C1430 22UF 25V 22UF 25V +5VD +5VD in NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S14.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 32 11K 1% C1517 C1518 U1502A Z1501 TLC082 R1522 BRIDGE 10K 1% C1510 C1507 100N 22UF 25V NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S15.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé http://www.excem.fr mailto:info@excem.fr...
  • Page 33 22UF 25V DIF1 AOUTR- DIF2 Z1606 +5VA AK4393 BRIDGE +5VA in U1602 +5VD +5VD in NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S16.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé http://www.excem.fr mailto:info@excem.fr...
  • Page 34 +15V -15V +18V -18V +15V in -15V in +18V in -18V in C1708 C1709 C1706 C1707 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S17.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 35 511 1% R1820 365 1% R1821 909 1% +18V -18V +18V in -18V in C1806 C1807 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S18.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 36 +15V -15V +18V -18V +15V in -15V in +18V in -18V in C1908 C1909 C1906 C1907 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S19.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 37 511 1% R2020 365 1% R2021 909 1% +18V -18V +18V in -18V in C2006 C2007 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S20.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 38 2.74K 1% R2525 RT424012 R2527 D2511 D2510 Q2504 PMLL4148L PMLL4148L PMBF170 R2526 C2530 470P NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S25.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé http://www.excem.fr mailto:info@excem.fr Numéro de dessin :...
  • Page 39 +5VD out TST2603 +5VD OUT C2603 R2604 470U 16V (N.U.) 27 3W R2616 R2617 R2618 R2619 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S26.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 40 CN5002 of the main PCB. R5002 C5001 220P PCB CONNECTOR (3X2) CN5004 D5002 C5002 SUBD9 SMP100LC-25 220P D5001 SMP100LC-25 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S50.Sch 78580 MAULE FRANCE Auteur : Frédéric Broydé http://www.excem.fr mailto:info@excem.fr...
  • Page 41 100N T1OUT T1IN T2OUT T2IN C5107 R1IN R1OUT 100N R2IN R2OUT +5VD MAX202ECSE C5108 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S51.Sch 78580 MAULE FRANCE Auteur : Frédéric Broydé http://www.excem.fr mailto:info@excem.fr Numéro de dessin :...
  • Page 42 PIN HEADER (2X7) MUTE SWI4 +5VD SWI5 SWI6 Q5201 SWI7 PMBF170 74HCT273 C5204 +5VD C5207 74HCT541 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S52.Sch 78580 MAULE FRANCE Auteur : Frédéric Broydé http://www.excem.fr mailto:info@excem.fr Numéro de dessin :...
  • Page 43 XTAL X5301 V CCP SHUNT 20MHz GND P C5310 470N C5307 C5309 C5308 4.7N 5% NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S53.Sch 78580 MAULE FRANCE Auteur : Frédéric Broydé http://www.excem.fr mailto:info@excem.fr...
  • Page 44 SenseSYNC U5107B U5107C +5VD C5403 74HCT00 74HCT00 +5VD 74HCT377 C5404 +5VD C5401 U5107E 74HCT00 NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S54.Sch 78580 MAULE FRANCE Auteur : Frédéric Broydé http://www.excem.fr mailto:info@excem.fr Numéro de dessin :...
  • Page 45 SW5501 SW5506 SW5507 SW5508 G1 G2 G1 G2 G1 G2 G1 G2 G1 G2 SWI[1..7] SWI[1..7] NX242 TDcontroller (revision 1) Excem Client : NEXO 12, chemin des Hauts de Clairefontaine Fichier : NX242rev2_0-S55.sch 78580 MAULE FRANCE Auteur : Frédéric Broydé...
  • Page 46 CAM Products 2000(TM): C:\CAMtasti\fichiers\NX242rev2_0_1\NX242rev2_0.cam...
  • Page 47 B.P. 50107 F-95950 Roissy CDG Cedex Tel: +33 1 48 63 19 14 Fax: +33 1 48 63 24 61 e-mail: info@nexo.fr LatAM Nexo USA Inc. Nexo Latin America Hualfin 1054 2165 Francisco Boulevard 1424 Capital Federal Suite E2 Argentina...

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