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Nautel VS2.5 Troubleshooting Manual

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VS2.5 Transmitter
Troubleshooting Manual
Document:NHB-VS2.5-TRB
Issue:
11.0 2019-05-10
Status:
Standard

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  • Page 1 VS2.5 Transmitter Troubleshooting Manual Document:NHB-VS2.5-TRB Issue: 11.0 2019-05-10 Status: Standard...
  • Page 3 The comparisons and other information provided in this document have been prepared in good faith based on publicly available information. The reader is encouraged to consult the respective manufacturer's most recent published data for verification. © Copyright 2019 NAUTEL. All rights reserved.

  • Page 5: Table Of Contents

    VS2.5 Troubleshooting Manual Table of contents Contents Release control record Responding to alarms Corrective maintenance Electrostatic protection Identifying and troubleshooting an alarm Troubleshooting tips 1-30 Operating with defective PAs or cooling fans 1-31 Replacing a suspect PWB, power supply or fan...
  • Page 6 VS2.5 Troubleshooting Manual Table of contents How to locate information about a specific part Column content Common abbreviations/acronyms Wiring/connector lists Wiring lists provided Wiring lists not provided Connector mating information Wire colours Printed wiring board patterns Reading Electrical Schematics Component values...

  • Page 7: Release Control Record

    VS2.5 Troubleshooting Manual Release control record Issue Date Reason 11.0 2019-05-10 Supports hardware NARF66I/04 and NARF66I/05. Supports software version VS SW 5.2 and higher. Issue 11.0 2019-05-10 Page vii...
  • Page 8 VS2.5 Troubleshooting Manual Page viii Issue 11.0 2019-05-10...

  • Page 9: Responding To Alarms

    VS2.5 Troubleshooting Manual Responding to alarms Section 1: Responding to alarms This section provides instructions you need when performing troubleshooting on the VS2.5 transmitter. This section includes the following topics: • Corrective maintenance • Electrostatic protection - see page 1-3 •...
  • Page 10 VS2.5 Troubleshooting Manual Responding to alarms On-air troubleshooting On-air troubleshooting can be performed from a remote location, or locally at the transmitter site. Remote troubleshooting Remote on-air troubleshooting consists of monitoring the transmitter's radiated signal using an on-air monitor or via a LAN connection, and observing the status of each remote fault alarm indicator.
  • Page 11 VS2.5 Troubleshooting Manual Responding to alarms Electrostatic protection The transmitter's assemblies contain semiconductor devices that are susceptible to damage from electrostatic discharge. The following precautions must be observed when handling an assembly which contains these devices. CAUTION: Electrostatic energy is produced when two insulating materials are rubbed together.
  • Page 12 VS2.5 Troubleshooting Manual Responding to alarms Identifying and troubleshooting an alarm You can identify an alarm locally by viewing the front panel (see “Front panel alarm checks”) or remotely by viewing the AUI’s Transmitter Status page (see “AUI Transmitter status page checks”...
  • Page 13 VS2.5 Troubleshooting Manual Responding to alarms View alarms screen If an alarm exists and is currently being recognized by the transmitter system, it is displayed in the View Alarms screen ( Main Menu -> View Status -> View Alarms ) of the front panel Display...
  • Page 14 5. If troubleshooting and subsequent replacement of a suspect PWB or module causes the alarm to disappear from the View Alarms screen, the alarm has been successfully cleared. If the fault condition does not clear, contact Nautel. Page 1-6 Issue 11.0 2019-05-10...
  • Page 15 VS2.5 Troubleshooting Manual Responding to alarms AUI Transmitter status page checks If an alarm exists and is being recognized by the transmitter (i.e., the Status button at the bottom of the AUI display will be red), it is displayed on the transmitter status page (see Figure 1.3).
  • Page 16 5. If troubleshooting and subsequent replacement of a suspect PWB or module causes the alarm to disappear from the Transmitter Status page, the alarm has been successfully cleared. If the fault condition does not clear, contact Nautel. Page 1-8 Issue 11.0 2019-05-10...
  • Page 17 (A1) is outside of its acceptable voltage range (between +1.1 V (+1.2V Fail) and +1.3 V). The VS2.5 takes no action on this alarm. Check for a +5V Supply Fail alarm: If present, follow the associated troubleshooting procedure. If not present, use a digital multimeter to measure between TP3 (+1.2 V) and TP4 (ground) of the...
  • Page 18 PWB (A2) is outside of its acceptable voltage range (between (+15V Fail) +13.5 V and +16.5 V). The VS2.5 takes no action on this alarm. Check for a +48V Supply Fail alarm: If present, follow the associated troubleshooting procedure. If not present, use a digital multimeter to measure between TP1 (+15 V) and TP3 (ground) of the PS distribution PWB.
  • Page 19 (A1) is outside of its acceptable voltage range (between +3.0 V (+3.3V Fail) and +3.6 V). The VS2.5 takes no action on this alarm. Check for a +5V Supply Fail alarm: If present, follow the associated troubleshooting procedure. If not present, use a digital multimeter to measure between TP1 (+3.3 V) and TP4 (ground) of the...
  • Page 20 PAs, suspect the PS distribution PWB (A2). Analog Left Exciter (amber) This alarm indicates the analog left audio input level is too low or Audio Low is not applied. The VS2.5 takes no action on this alarm. (Anlg Left Aud Low) Analog Right Exciter (amber)
  • Page 21 Mismatch transmitter does not match the version expected to be seen by the (CPLD Ver version of code installed on the DSP. The VS2.5 will not be able to Mismatch) turn RF on. Contact Nautel for further assistance. Cutback Active...
  • Page 22 External Exciter (red) This alarm occurs when the external interlock input wired to the Interlock Open exciter/control PWB (A1) is open. The VS2.5 will not be able to (External enable its RF output. Check the interlock connection between Interlock) A1J2A-19 and A1J2A-20 on the rear of the transmitter. If the interlock connection is intact, check that all external interlock switches are closed.

  • Page 23: Pa Pwb Replacement

    (amber) fans is below 3000 RPM (half of its nominal value of 6000 RPM). If any of fans 3 through 7 fail, the VS2.5 will reduce its maximum power setting based on the number of fan failures that have occurred (see Table 1.3 on page...
  • Page 24 (Fwd Power the preset power level and is user adjustable) due to PA failures, Very Low) fan failures, or SWR foldback. The VS2.5 takes no action on this alarm. See Forward Power Low for troubleshooting tips. High Forward Output Network...
  • Page 25 VS2.5 Troubleshooting Manual Responding to alarms Alarm Name Front Panel AUI and Description and Troubleshooting Action LED (color) (Front Panel) High SWR Output Network This alarm occurs if the transmitter tries to reduce the forward Shutdown (red) power below a level that is equivalent to a 3:1 VSWR (forward power of 412 W) at the SWR Foldback threshold (reflected power of 103 W) due to a gradually degrading load match.
  • Page 26 Digital carriers are muted. Check the IBOC data source. IPA Fail PA (red) This alarm occurs if the IPA Output Low alarm is present and the measured IPA current is below 225 mA. The VS2.5 takes no action on this alarm. See IPA Output Low for troubleshooting tips.

  • Page 27: Pre-Amp/Ipa Pwb Replacement

     (A2). If the measurement is greater than 1 , replace the fuse (Nautel Part # FA57 in the ancillary kit). If the measurement is less  than 1 , or replacing the fuse does not clear the alarm, replace the pre-amp/IPA PWB (A5) (see “Pre-amp/IPA PWB replacement”...
  • Page 28 (+48V Fail) outside of its acceptable voltage range (between +43 and +53 V). The VS2.5 takes no action on this alarm. Use a digital multimeter to measure between +V and -V of the +48 V power supply. If the measured value is not within the acceptable range, replace the +48 V power supply (see “+48 V Power Supply Replacement”...
  • Page 29 VS2.5 Troubleshooting Manual Responding to alarms Alarm Name Front Panel AUI and Description and Troubleshooting Action LED (color) (Front Panel) No HD Data Exciter (amber) This alarm occurs, in FM+HD or HD mode, if IBOC data is not detected from the VSHD exciter’s Exgine PWB. Digital carriers are muted.
  • Page 30 Exciter (red) This alarm indicates that the exciter’s master clock is not locked. Possible causes are an out-of-range 10 MHz input or a hardware failure on the exciter/control PWB (A1). The VS2.5’s RF output is inhibited. Preamp Fail PA (red) This alarm occurs if the IPA Output Low alarm is present and the measured pre-amp current is below 17.5 mA.

  • Page 31: Power Supply Module Replacement

    This alarm occurs if power supply module A (U1) or B (U2) is Fail reporting an ac failure, indicating its ac input voltage is less than 175 V ac. The VS2.5 will reduce its maximum power if only one power supply module failed (see Table 1.3 on page 1-31).
  • Page 32 This alarm occurs if power supply module A (U1) or B (U2) is Over reporting a high temperature alarm, indicating its operating Temperature temperature has exceeded its internal threshold. The VS2.5 will (PS A Over reduce its maximum power if only one power supply module failed Temp) (see Table 1.3 on page...
  • Page 33 The VS2.5 takes no action on this alarm. SRC1 Unlock Exciter (amber) This alarm indicates that no valid AES/EBU stream data is being detected on the selected AES/EBU. The VS2.5 takes no action on this alarm. Issue 11.0 2019-05-10 Page 1-25...
  • Page 34 VS2.5 Troubleshooting Manual Responding to alarms Alarm Name Front Panel AUI and Description and Troubleshooting Action LED (color) (Front Panel) SWR Foldback Output Network This alarm occurs if the transmitter's average reflected power (amber) exceeds the SWR foldback threshold (103 W) due to a gradually degrading load match.
  • Page 35 VS2.5 Troubleshooting Manual Responding to alarms Table 1.2: Troubleshooting Summary Alarms Summary Alarm Description and Triggering Alarms Name This summary alarm is triggered if any of the following ac power related alarms occur: PS A AC Fail PS B AC Fail...
  • Page 36 VS2.5 Troubleshooting Manual Responding to alarms Table 1.2: Troubleshooting Summary Alarms Summary Alarm Description and Triggering Alarms Name Low Battery/Memory This summary alarm is triggered if any of the following battery or memory related alarms occur: Entered Firmware Upgrade Missing Preset...
  • Page 37 VS2.5 Troubleshooting Manual Responding to alarms Table 1.2: Troubleshooting Summary Alarms Summary Alarm Description and Triggering Alarms Name Power Supply This summary alarm is triggered if any of the following power supply related alarms occur: Discharging PA Volts PS A, B or C Over Temp +1.8V Fail...
  • Page 38 ARM Reset procedure in the Operations and Maintenance Manual. If the AUI is still inaccessible, try cycling (turn off, then on) the ac power. If the problem persists, contact Nautel for further assistance. Page 1-30...
  • Page 39 VS2.5 Troubleshooting Manual Responding to alarms Operating with defective PAs or cooling fans It is permissible to operate the transmitter with multiple defective power amplifier PWBs or cooling fans. Table 1.3 shows the approximate remaining output power when power amplifiers (PAs) or cooling fans fail.
  • Page 40 VS2.5 Troubleshooting Manual Responding to alarms Replacing a suspect PWB, power supply or fan Maintenance philosophy Maintenance on a VS2.5 transmitter consists of replacing any of the PWBs, power supplies or fans identified in Table 1.4 on page 1-33. Special Tools and Test Equipment The following tools and test equipment are required to troubleshoot a VS2.5 transmitter.
  • Page 41 Preparation for replacing a PWB or module 1. Disable the VS2.5’s RF output (RF off) and set its AC POWER switch to the off position. Disconnect all cabling from the rear of the VS2.5, remove the VS2.5 from its host cabinet and place the VS2.5 on a suitable work surface.
  • Page 42 FETs are static sensitive. Handle the PA PWB in a static protected manner. 8. Spread a small amount of thermal compound (Nautel Part #HAG39, from the station spares kit), in a thin even layer, on the bottom of the FET flange on the new PA PWB.
  • Page 43 VS2.5 Troubleshooting Manual Responding to alarms 9. Secure the PA PWB on the module's heat sink using the four screws removed in Step 5. Ensure correct orientation (same as the adjacent PWB). Do not tighten the four screws at this time.
  • Page 44 VS2.5 Troubleshooting Manual Responding to alarms 2. Using a digital multimeter, measure the resistance between each gate lead of the FET and the metal flange of the FET. – If the measurement is less than 8 k, replace the PA PWB (see “PA PWB...
  • Page 45 FETs are static sensitive. Handle the PA PWB in a static protected manner. 8. Spread a small amount of thermal compound (Nautel Part # HAG39, from the station spares kit), in a thin, even layer, on the bottom surface of the pre-amp/IPA PWB...
  • Page 46 Avoid this by alternately tightening the two screws. 10. Install FET clamps (Nautel Part # 211-1215) on Q1 and Q2, ensuring they are parallel to the heat sink. Loosely secure each FET (Q1 and Q2) with two M3 screws, two...
  • Page 47 VS2.5 Troubleshooting Manual Responding to alarms Figure 1.4: Pre-amp/IPA PWB mounting hardware BELLEVILLE WASHER ORIENTATION SCREW x 2 BELLEVILLE WASHER (HAJ59) x 2 (see inset for orientation) FLAT WASHER x 2 FET CLAMPS (211-1215) Issue 11.0 2019-05-10 Page 1-39...
  • Page 48 3. Slide the power supply module toward the front of the transmitter to disengage it from its mating connector. 4. Remove the power supply module from the transmitter. 5. Locate or obtain a replacement power supply module (Nautel Part # UG69J). Reverse Step 1 through Step 4 to reinstall the new power supply module.

  • Page 49: +48 V Power Supply Replacement

    4. Disconnect wires # 10, 11, 12, 13 and 14 from the +48 V power supply’s terminal block, noting their destinations. 5. Locate or obtain a replacement +48 V power supply (Nautel Part # UG75). Install the mounting bracket on the new power supply and reverse...

  • Page 50: Cooling Fan Replacement - Fans 3 (B3) Through 7 (B7)

    4. Remove and retain all M3 screws and other hardware that secures the fans to the mounting brackets. Note the orientation of brackets and fans before disassembling. 5. Obtain a replacement fan (Nautel Part # ZAP50) from the station spares kit, if purchased, or a suitable equivalent (vendor part # is Minebea Motor Mfg. Co.
  • Page 51 VS2.5 Troubleshooting Manual Responding to alarms Figure 1.5: Fan Bracket Removal Remove front panel air filter to B1 and B2 and allow removal of B1 or B2 bracket bracket Cooling fan bracket assembly Issue 11.0 2019-05-10 Page 1-43...

  • Page 52: Cooling Fan Replacement - Fans 1 (B1) And 2 (B2)

    Note the orientation of the bracket and fan before disassembling. 6. Remove the clip-on ferrite (Nautel Part # LA52) from the fan that is being replaced. 7. Obtain a replacement fan (Nautel Part # ZAP42) from the station spares kit, if purchased, or a suitable equivalent (vendor part # is Sanyo Denki 9G0848G103).
  • Page 53 VS2.5 Troubleshooting Manual Responding to alarms 12. Re-install front panel air filter. 13. Re-install the transmitter’s top cover. 14. Re-install the transmitter in its host cabinet, reconnect all interconnect cables and restore operation by enabling ac and RF power. Issue 11.0 2019-05-10...

  • Page 54: Exciter/Control Pwb Replacement

    VS2.5 Troubleshooting Manual Responding to alarms Exciter/Control PWB Replacement See Figure MD-1 (top view) in the Mechanical Drawings section (Section 6) of this manual. NOTE: The exciter/control PWB is static sensitive and must be handled in a static protected manner.
  • Page 55 VS2.5 Troubleshooting Manual Responding to alarms Figure 1.6: Removing the XLR connector’s “push” lever Figure 1.7: Loosening the BNC connector’s locking ring Issue 11.0 2019-05-10 Page 1-47...
  • Page 56 6. Slightly lift the front edge of the exciter/control PWB and withdraw towards the front of the transmitter. 7. Locate or obtain a replacement exciter/control PWB (Nautel Part # NAPE87B). Remove the “push” lever from the XLR connector as detailed in...

  • Page 57: Ps Distribution Pwb Replacement

    7. Use a 5.5 mm nut driver to remove the 12 M3 nuts, split and flat washers that secure the PS distribution PWB to the transmitter. Retain hardware. 8. Remove the PS distribution PWB from the transmitter. 9. Locate or obtain a replacement PS distribution PWB (Nautel Part # NAPS53). Reverse Step 1 through Step 8 to reinstall the new PS distribution PWB.

  • Page 58: Combiner Interface Pwb Replacement

    4. Remove the combiner interface PWB from the transmitter by pulling straight up (i.e., disconnecting from edge card connector). Note the orientation of the PWB for installing the replacement PWB. 5. Locate or obtain a replacement combiner interface PWB (Nautel Part # NAPI139). Reverse Step 1...

  • Page 59: Detailed Circuit Descriptions

    Pre-amp/IPA PWB (NAPA28B) - see page 2-3 • Power amplifier PWB (NAPA31C) - see page 2-4 VS2.5 electrical schematics The descriptions in this section all refer to the VS2.5 electrical schematics listed in Table 5.1 on page 5-5 of the VS2.5 Troubleshooting Manual.

  • Page 60: Ps Distribution Pwb (Naps53)

    See electrical schematic Figure SD-3. Interfacing The PS distribution PWB provides the interface between the VS2.5’s power supplies and the rest of the transmitter. It passes: – ac voltage from the AC INPUT to power supply modules U1 and U2.

  • Page 61: Pre-Amp/Ipa Pwb (Napa28B)

    VS2.5 Troubleshooting Manual Detailed Circuit Descriptions Fan monitoring 8-bit shift register IC U5 accepts the fan tach signals from fans B1 and B2 and converts them to a serial data stream on the MISO 165 output (J7-4). This output is applied to the exciter/control PWB for monitoring purposes.

  • Page 62: Power Amplifier Pwb (Napa31C)

    VS2.5 Troubleshooting Manual Detailed Circuit Descriptions The IPA V input is applied to capacitors C19, C21, C22 and C24, which act as a broadband decoupling network. Capacitor C23 and inductors L14 and L15 provide low-pass filtering of the RF signal back to the ac-dc power stage.

  • Page 63: Parts Lists

    Nautel configuration control number, then locate the reference designation information for that Nautel configuration control number. • Locate the part's reference designation and associated Nautel Part # in the list provided at the end of this section. In a PDF manual, use Ctrl-F (find) to quickly locate the reference designation.

  • Page 64: Column Content

    This number represents the level of a component in relation to the highest level parts list. In this case the highest level parts list is the VS2.5’s overall parts list, or the top block in the family tree shown in Figure 3.1 on page 3-4...

  • Page 65: Common Abbreviations/Acronyms

    Note: This section includes Nautel part numbers only. It does not include original equipment manufacturer (OEM) information (i.e., vendor part numbers). Some vendor information is provided in the Responding to Alarms section of this manual, otherwise contact Nautel to order a replacement part or to request assistance to find a suitable replacement.
  • Page 66 VS2.5 Troubleshooting Manual Parts Lists Figure 3.1: VS2.5 Family Tree VS2.5 2.5 KW FM BROADCAST TRANSMITTER NARF66I/04 and /05 CONTROL/EXCITER PWB POWER SUPPLY DISTRIBUTION PWB INTERFACE PWB SPLITTER PWB NAPE87B NAPS53 PR65C NAPH03A A7 - A9 PRE-AMP/IPA PWB POWER AMPLIFIER 1 PWB...
  • Page 67 NARF66I/04 Page 1 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation 200-5112 USB Mod, Programmed VS (Handbook) 211-4270 Feed-Thru Capacitor Interface Assy, VS2.5 A14, A15, A16, A17...
  • Page 68 NARF66I/04 Page 2 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation BAP44 LED, Pilot Light, Amber, 230 Vac DS01 CBP08 Capacitor, Feed-Thru, Ceramic, 1000pF C01, C02, C03, C04, C05, C06, C07, C08, C09...
  • Page 69 NARF66I/04 Page 3 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation LA57 Bead, Ferrite, SMT, 47ohm, 2.85mm H x 5.10mm Lg LS26 Inductor, SMT, 82nH, 2%, 2.5A, 4.20mm H x 4.95mm LS27 Inductor, SMT, 120nH, 2%,1.5A, 4.20mm H x 4.95mm...
  • Page 70 NARF66I/04 Page 4 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation RAD49Z Resistor,SMT,MF,10ohms, 1%,2W RAD54Z Resistor,SMT,4.7 ohms, 5%,2W R04, R05 RAD80 Resistor, SMT,10k Ohms, 1%, 1W 2512...
  • Page 71 NARF66I/04 Page 5 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation CCFS37 Cap,SMT,Ceramic,390pF,2%,50V, C0G,0603 C529 CCFS38 Cap,SMT,Ceramic,470pF,2%,50V, C0G,0603 C015, C016, C023, C038, C045, C048, C052, C055, C057,...
  • Page 72 NARF66I/04 Page 6 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation CCFS57 Cap,SMT,Ceramic,10uF,20%,6.3V, X5R,0805 C001, C005, C006, C007, C081, C084, C086, C089, C131, C150, C179, C181, C337, C347, C348, C504,, C523, C527,...
  • Page 73 NARF66I/04 Page 7 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation LCFS01 Inductor, SMT, Choke, 600ohms, 2A, 0805 L002, L004, L005, L006, L007, L010, L011, L012, L016, L017,...
  • Page 74 NARF66I/04 Page 8 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation RAE34 Resistor,SMT,MF,49.9R,1%,1/10W 0603 R240, R241, R465, R469, R473, R474 RFFS01 Resistor,SMT,MF,0.0ohms,Jumper ,0603 R207, R208, R325 RFFS02 Resistor,SMT,MF,1.00ohms,1%, 1/10W,0603...
  • Page 75 NARF66I/04 Page 9 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation RFFS38 Resistor,SMT,MF,1000ohms,1%, 1/10W,0603 R017, R037, R042, R043, R062, R078, R081, R087, R088, R095, R096, R115, R189, R196, R199, R205,, R211, R218,...
  • Page 76 NARF66I/04 Page 10 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation RT50 Resistor,SMT,MF,0.0 ohms, Jumper,0805 R344, R476, R477, R478, R488 RX62 Thermistor, PTC, SMT, 1206, 125mA Hold...
  • Page 77 NARF66I/04 Page 11 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation US19 IC, SMT, Digital Step Attenator, QFN-20 U094 US20 IC, SMT, stereo Volume Control , SOIC-16...
  • Page 78 NARF66I/04 Page 12 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation NAPF13A RF LPF PWB Assy, VS 2.5 CS100 Capacitor, SMT, Porcelain,20pF 500V, 2% CS99 Capacitor, SMT, Porcelain,18pF 500V, 2% LA61 Inductor, Filter Coil, 85nH, 4 turns, 1/8"...
  • Page 79 NARF66I/04 Page 13 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation HAJ66 Terminal, SMT, Test Point, PWB TP01, TP02, TP03, TP04 JN69 Conn, Edge Card, 3A, 12 Contac ts, Dual Row, 30u G LS42 Inductor, SMT, 17.5nH, 2%, 4A, 3.15mm H x 6.86mm L...
  • Page 80 NARF66I/04 Page 14 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation HAJ66 Terminal, SMT, Test Point, PWB TP02, TP03, TP12, TP21, TP28 JA95 Conn, 47 Contact, F, 90 deg, PWB Mt...
  • Page 81 NARF66I/04 Page 15 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation RFFS52 Resistor,SMT,MF,15.0Kohms,1%, 1/10W,0603 R069 RFFS54 Resistor,SMT,MF,22.1Kohms,1%, 1/10W,0603 R064 RFFS61 Resistor,SMT,MF,82.5Kohms,1%, 1/10W,0603 R065 RFFS62 Resistor,SMT,MF,100Kohms,1%, 1/10W,0603 R007, R063...
  • Page 82 NARF66I/04 Page 16 of 16 StockCode: Final Assy, VS2.5, 7/16 DIN, (w/o JA55),Dual Power, Supply, RLS 10 Description: Component Lvl, StockCode Description Reference Designation UG69J Pwr Sply, 7-53Vdc, 2000W, 50A 90-264Vac, Hi-Eff (8 U01, U02 UG75 Power Supply, 48V@320W, 88-264 VAC, PFC, EMI...

  • Page 83: Wiring/Connector Lists

    VS2.5 Troubleshooting Manual Wiring/connector lists Section 4: Wiring/connector lists This section contains the wiring information for the hard-wired assemblies of the transmitter, and applicable connector mating information. Wiring lists provided Wiring lists are provided in tabular format. Table 4.1 on page 4-2 lists the tables containing wiring information.
  • Page 84 Wiring List - VS2.5 Transmitter (page 4-2) Table 4.2: Connector Mating Information Provided Table # Description Table 4.4 Connector Mating Information - VS2.5 Transmitter (page 4-5) Table 4.3: Wiring List - VS2.5 Transmitter Source Destination Wire # Colour Size Remarks TB1-2 CB1-L1/IN White...
  • Page 85 VS2.5 Troubleshooting Manual Wiring/connector lists Table 4.3: Wiring List - VS2.5 Transmitter Source Destination Wire # Colour Size Remarks P7-1 J5-1 Yellow P7-2 J5-2 Black P7-3 J5-3 P8-1 J6-1 Yellow P8-2 J6-2 Black P8-3 J6-3 A2TB4-1 A15TB1-3 White A2TB3-1 A15TB1-4...
  • Page 86 VS2.5 Troubleshooting Manual Wiring/connector lists Table 4.3: Wiring List - VS2.5 Transmitter Source Destination Wire # Colour Size Remarks A4-Q A9-X Link A5-F A10-Z Link A5-H A10-AA Link A6-D A10-CC Link A7-D A10-FF Link A8-D A10-JJ Link A9-D A10-MM Link...
  • Page 87 VS2.5 Troubleshooting Manual Wiring/connector lists Table 4.4: Connector Mating Information - VS2.5 Transmitter Connector Mate Remarks B1P1 Fan1 Connection B2P1 Fan2 Connection B3P1 A4J1 Fan3 Connection B4P1 A4J2 Fan4 Connection B5P1 A4J3 Fan5 Connection B6P1 A4J4 Fan6 Connection B7P1 A4J5...
  • Page 88 VS2.5 Troubleshooting Manual Wiring/connector lists Page 4-6 Issue 11.0 2019-05-10...

  • Page 89: Reading Electrical Schematics

    • Resistor power ratings are not shown when less than 0.5 W • Capacitor values are shown in microfarads (uF) • Unidentified diodes are part number 1N4938 (Nautel Part # QAP29) Graphic symbols The graphic symbols used on electrical schematics are in accordance with American National Standard ANSI Y32.2-1975 - Graphic Symbols for Electrical and Electronic Diagrams.

  • Page 90: Unique Symbols

    VS2.5 Troubleshooting Manual Reading Electrical Schematics Unique symbols Nautel uses unique symbols on electrical schematics to describe logic (two-state) signals. These signals differ from single-state signals or analog signals that may have multiple values. Type of inputs and outputs On electrical schematics, names used to describe logic (two-state) input and output signals are prefixed with a # symbol.

  • Page 91: Structure Of Schematics

    3-1. Follow the family tree branches to the block that contains the desired reference designation, and associated Nautel nomenclature (e.g., NAPA31C PA PWB ). Note the reference designations and Nautel nomenclatures of all higher assemblies in the path, if applicable.

  • Page 92: Locating A Part Or Assembly On A Schematic

    3-1. 2. Follow the family tree branches to the block that contains the desired reference designation, while noting the Nautel nomenclatures and names of all higher assemblies in the path, as applicable. Example: A5 NAPA31C PA PWB . Note: The drawings in the Mechanical Drawings section depict the assembly detail of the transmitter and its modules and assemblies.
  • Page 93 DENOTES TB2 DENOTES TB3 DISTRIBUTION B2L1 B2P1 FAN 2 V (+) DENOTES TB4 B2P1 FAN 2 V (-) FAN TACH 2 211-8200-24 SCH01 VA Figure SD-1: VS2.5 Transmitter - Ac-Dc and Exciter/Control Stages (Sheet 1 of 2) Issue 11.0 2019-05-10 SD-1...
  • Page 94 EXCITER HD DATA (+) +15V OUT HD DATA (-) +15V OUT PILOT SAMPLE OUT FROM EXTERNAL 10 MHz IN SOURCE 211-8200-24 SCH02 VA Figure SD-2: VS2.5 Transmitter - Ac-Dc and Exciter/Control Stages (Sheet 2 of 2) Issue 11.0 2019-05-10 SD-2...
  • Page 95 FLTR 10.0K INTERFACE FWD PWR SAMPLE VRMS REFLD PWR RF_IN ENBL REFLD 1000 0.01 SMPL ADL5501 FLTR 10.0K VRMS REFLD PWR SAMPLE 211-8200-24 SCH03 VA Figure SD-3: VS2.5 Transmitter - RF Drive and RF Power Stages Issue 11.0 2019-05-10 SD-3...
  • Page 96 +VE SENSE (PS A) PA 1 V (+) 0.002 +VE (PS A) PA 2 V (+) 0.01 0.002 PA 3 V (+) -VE SENSE (PS A) 0.002 PA 4 V (+) 0.002 C107 C106 C102 -VE (PS A) PA 1 V (-) PA 2 V (-) +48V +5V-A...
  • Page 97 V CTRL PS CTRL V + PS CTRL V +48V 0.01 FROM SHEET 1 22.1K IRF9540NSPBF # 165 LOAD - SHIFT/LOAD 82.5K 0603ESDA-TR # FAN ENABLE + FAN V (+) +5V-A +5V-A +5V-A +5V-A +5V-A +5V-A +5V-A +5V-A MMBT4401LT1 0.01 MISO 165 RXE250 1000...
  • Page 98 IPA V 0.082μH 0.022 0.022 0.001 0.028μH NAPA28 470uF PRE-AMP V NAPA28A 470uF 0.082μH 0.12μH NAPA28B 330uF 68uF 0.022 0.022 1000pF RF OUTPUT 0.012μH 0.012μH 30pF 30pF 30pF 1000pF MRF6V2150NBR1 0.0355μH 0.0355μH 0.033μH 12pF 12pF 10pF 47pF 1000pF MRF6V2010N RF DRIVE 0.043μH 47pF 1000pF...
  • Page 99 PA V 470μF 470μF 470μF 470μF 470μF 470pF 0.01 0.01 PA BIAS 10.0K BAT54HT1 47.5K 1SMB5918B T2:A 5.1V Q1:A MRFE6VP61K25H 0.001 RF OUT RF DRIVE 100nH 15pF 36pF 0.001 82nH MRFE6VP61K25H Q1:B T2:B 0.001 S2110145 SHEET 1 OF 1 V1 0.001 Figure SD-7: NAPA31C PA PWB Issue 11.0 2019-05-10...

  • Page 100: Mechanical Drawings

    3-1. Follow the family tree branches to the block that contains the desired reference designation and Nautel nomenclature (e.g., NAPA31C PA PWB ). Note the reference designations and Nautel nomenclatures of all higher assemblies in the path, as applicable. Example: A6 NAPA31C PA PWB .
  • Page 101 Then, repeat this procedure until the desired part or assembly is found. Table 6.1: List of Mechanical Drawings Figure # Title MD-1 VS2.5 Transmitter (Front, Rear and Top Views) MD-2 VS2.5 Transmitter (Bottom and Side Views) MD-3 NAPE87B Exciter/Control PWB MD-4...
  • Page 102 VSHD upgrade only) EXCITER/ SECURING SCREWS REAR VIEW CONTROL (QTY 5) POWER SUPPLY MODULES FRONT VIEW FEED THRU CAPACITOR INTERFACE ASSY (A14, A15) (under U4) 48 V POWER SUPPLY Figure MD-1: VS2.5 Transmitter (Front, Rear and Top Views) Issue 11.0 2019-05-10 MD-1...
  • Page 103 COMBINER PRE-AMP/ IPA PWB PA PWBs 1 (A6), 2 (A7) 3 (A8), 4 (A9) SPLITTER FEED THRU CAPACITOR INTERFACE INTERFACE ASSY (A16, A17) RIGHT SIDE VIEW (under chassis) Figure MD-2: VS2.5 Transmitter (Bottom and Side Views) Issue 11.0 2019-05-10 MD-2...
  • Page 104 L124 (LOWER) (LOWER) L103 L132 U120 L144 L125 R448 R455 (UPPER) (UPPER) R221 R48 R51 R237 U105 R235 R458 C165 C562 C138 R129 C419 C235 R456 R139 R238 R348 R449 C415 L157 C563 C166 R349 C412 C226 R262 C314 R442 R140 R239 C286...
  • Page 105 C110 C111 C112 +5V-A IPA V +48V IN TP25 LINE 1 LINE 2/ R101 NEUTRAL {RefDes2} C122 PA 1 TP24 C114 AC OUTPUT PA 2 C123 LINE 1 LINE 2/ NEUTRAL C115 R59 R60 C121 AC INPUT C116 C117 +15V CR10 TP26 TP22...
  • Page 106 RF IN RF DRIVE (U/S) SPLITTER NAPH03 SER. M2110148 V1 Figure MD-5: NAPH03A Splitter PWB Issue 11.0 2019-05-10 MD-5...
  • Page 107 211-1121 PR36 ISS.B FRONT PRE-AMP/IPA NAPA28 SER. M2110064 V1 Figure MD-6: NAPA28B Pre-Amp/IPA PWB Issue 11.0 2019-05-10 MD-6...
  • Page 108 Figure MD-7: NAPA31C PA PWB Issue 11.0 2019-05-10 MD-7...
  • Page 109 COMBINER NAPH04 SER. M2110092 V1 Figure MD-8: NAPH04 Combiner PWB Issue 11.0 2019-05-10 MD-8...
  • Page 110 LOW PASS FILTER NAPF13 SER. M2110080 V1 Figure MD-9: NAPF13A RF Low Pass Filter PWB Issue 11.0 2019-05-10 MD-9...
  • Page 111 C13 R19 M2110079 V1 Figure MD-10: NAPI139 Combiner Interface PWB Issue 11.0 2019-05-10 MD-10...

  • Page 112: List Of Terms

    List of terms Section 7: List of terms This section defines some of the terms that are used in Nautel documentation. Audio Engineering Society/European Broadcasting Union (AES/EBU) is the name AES-EBU. of a digital audio transfer standard. The AES/EBU digital interface is usually implemented using 3-pin XLR connectors (the same type connector used in professional microphones).
  • Page 113 VS2.5 Troubleshooting Manual List of terms A setting that controls power level, frequency and audio parameters. The VS2.5 allows Preset. you to pre-program multiple presets. Printed Wiring Board. PWB. A complete, but temporary loss of RF output power, caused by any one of a Shutback.
  • Page 115 Phone: +1.902.823.3900 or Fax: +1.902.823.3183 Nautel Inc. 201 Target Industrial Circle Bangor, Maine USA 04401 Phone: +1.207.947.8200 Fax: +1.207.947.3693 Customer Service (24-hour support) +1.877.628.8353 (Canada & USA only) +1.902.823.5100 (International) Email: support@nautel.com Web: www.nautel.com © Copyright 2019 NAUTEL. All rights reserved.

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