Nautel VS1 Troubleshooting Manual
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Nautel VS1 Troubleshooting Manual

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See also: Operation & Maintenance Manual , Installation Manual
VS1 Transmitter
Troubleshooting Manual
Document: NHB-VS1-TRB
Issue:
10.0 2018-10-29
Status:
Standard

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Summary of Contents for Nautel VS1

  • Page 1 VS1 Transmitter Troubleshooting Manual Document: NHB-VS1-TRB Issue: 10.0 2018-10-29 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 2018 NAUTEL. All rights reserved.

  • Page 5: Table Of Contents

    VS1 Troubleshooting Manual Table of contents Contents Release control record Responding to alarms Corrective maintenance Electrostatic protection Identifying and troubleshooting an alarm Troubleshooting tips 1-28 Operating with defective PAs or cooling fans 1-29 Operating in FM+HD mode with SWR Foldback...
  • Page 6 VS1 Troubleshooting Manual Table of contents Parts Lists Parts information Family tree 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...

  • Page 7: Release Control Record

    VS1 Troubleshooting Manual Release control record Issue Date Reason 10.0 2018-10-29 Hardware Release 10 (NARF65I and NARF65I/01). Supports software version VS SW 5.2 and higher. Issue 10.0 2018-10-29 Page vii...
  • Page 8 VS1 Troubleshooting Manual Page viii Issue 10.0 2018-10-29...

  • Page 9: Responding To Alarms

    Operating with defective PAs or cooling fans - see page 1-29 • Replacing a suspect PWB, power supply or fan - see page 1-31 If none of the procedures and alarms described in this section address your problem, contact Nautel for assistance. See “Technical support” on page...
  • Page 10 VS1 Troubleshooting Manual Responding to alarms 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. Information obtained from these sources should enable an operator to decide whether an alarm response may be deferred to a more convenient time, an immediate corrective action must be taken, or if a standby transmitter must be enabled (if one is available).

  • Page 11: Electrostatic Protection

    VS1 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: Identifying And Troubleshooting An Alarm

    VS1 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 VS1 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 (see Figure 1.2).
  • 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 10.0 2018-10-29...
  • Page 15 VS1 Troubleshooting Manual Responding to alarms AUI Transmitter status page checks If an alarm exists and is being recognized by the transmitter, it is displayed under the Alarms tab of the transmitter status page (see Figure 1.3). The Device name indicates the sub-system origin of the alarm.
  • 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 10.0 2018-10-29...
  • Page 17 (A1) is outside of its acceptable voltage range (between +1.1 V (+1.2V Fail) and +1.3 V). The VS1 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 (between -13.5 V and (-15V Fail) -16.5 V). The VS1 takes no action on this alarm. Check for a +15V Supply Fail alarm: If present, follow the associated troubleshooting procedure. If not present, use a digital multimeter to measure between TP11 and TP7 (ground) of the exciter/control PWB.
  • Page 19 (A1) is outside of its acceptable voltage range (between +3.0 V (+3.3V Fail) and +3.6 V). The VS1 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 VS1 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 VS1 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 VS1 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 (Fwd Power the preset power level and is user adjustable) due to PA failures, Very Low) fan failures, or SWR foldback. The VS1 takes no action on this alarm. See Forward Power Low for troubleshooting tips. Issue 10.0 2018-10-29 Page 1-15...
  • Page 24 Power (amber) calculated power in any reject resistor exceeds the high reject power threshold (148 W). The VS1 takes no action on this alarm. Check for associated alarms, and follow the associated troubleshooting procedure if present. Typically, high reject power is the result of a PA failure or removal.
  • Page 25 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 VS1 takes no action on this alarm. See IPA Output Low for troubleshooting tips.
  • Page 26 F1 of the PS distribution PWB (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...
  • Page 27 (+48V Fail) outside of its acceptable voltage range (between +43 and +53 V). The VS1 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 28 VS1 Troubleshooting Manual Responding to alarms Alarm Name Front Panel AUI and Description and Troubleshooting Action LED (color) (Front Panel) No External Exciter (amber) This alarm occurs if frequency locking to an external 10 MHz 10 MHz souce is enabled and no external 10 MHz is detected. The exciter...
  • Page 29 175 V ac. The VS1 will inhibit its RF output until the alarm is cleared. Check the ac voltage applied to the power supply module. If the ac voltage is...
  • Page 30 This alarm occurs if the power supply module (U2) is reporting a PS failure, indicating its output voltage is outside of its acceptable range. The VS1 will inhibit its RF output until the alarm is cleared. Try replacing the power supply module with a new module (see “Power Supply Module Replacement”...
  • Page 31 SCA1 Low Exciter (amber) This alarm indicates the SCA 1 input level is too low or is not applied. The VS1 takes no action on this alarm. SCA2 Low Exciter (amber) This alarm indicates the SCA 2 input level is too low or is not applied.
  • Page 32 (Front Panel) SRC1 Unlock Exciter (amber) This alarm indicates that no valid AES/EBU stream data is being detected on the selected AES/EBU. The VS1 takes no action on this alarm. SWR Foldback Output Network This alarm occurs if the transmitter's average reflected power...
  • Page 33 VS1 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 Audio Loss This summary alarm is triggered if any of the following audio loss related alarms...
  • Page 34 VS1 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 Low Battery...
  • Page 35 VS1 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 Over Temp +1.8V Fail...

  • Page 36: Troubleshooting Tips

    VS1 Troubleshooting Manual Responding to alarms Troubleshooting tips AUI lockup If the remotely accessed AUI screen stops responding, and subsequent attempts to re-access the AUI are unsuccessful, verify that all network settings are correct (see Network Setup in the Operations and Maintenance Manual).

  • Page 37: Operating With Defective Pas Or Cooling Fans

    VS1 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 1.4 shows the approximate remaining output power when power amplifiers (PAs) or cooling fans fail.

  • Page 38: Operating In Fm+Hd Mode With Swr Foldback

    Responding to alarms Operating in FM+HD mode with SWR Foldback When an SWR Foldback alarm occurs, the VS1’s forward power will be reduced to a level that maintains an SWR that is below the foldback threshold. For FM+HD systems, the reduced forward power also depends on the injection level (e.g., -20 dBc, -14 dBc, etc.) and the aggressiveness of...

  • Page 39: Replacing A Suspect Pwb, Power Supply Or Fan

    VS1 Troubleshooting Manual Responding to alarms Replacing a suspect PWB, power supply or fan Maintenance philosophy Maintenance on a VS1 transmitter consists of replacing any of the PWBs, power supplies or fans identified in Table 1.5 on page 1-32. Special Tools and Test Equipment The following tools and test equipment are required to troubleshoot a VS1 transmitter.
  • Page 40 Preparation for replacing a PWB or module 1. Disable the VS1’s RF output (RF off) and set its AC POWER switch to the off position. Disconnect all cabling from the rear of the VS1, remove the VS1 from its host cabinet and place the VS1 on a suitable work surface.

  • Page 41: Pa Pwb Replacement

    FETs are static sensitive. Handle the PA PWB in a static protected manner. 8. If you are replacing PA # 4 (A9), spread a small amount of thermal compound (Nautel Part # HAG39, from the station spares kit), in a thin, even layer, on the top and bottom of...
  • Page 42 VS1 Troubleshooting Manual Responding to alarms 10. Secure the PA PWB on the module's heat sink using the four screws removed in Step Ensure correct orientation (same as the adjacent PWB). If you are replacing PA # 4 (A9), re- install thermistor RT2 under the appropriate securing screw (see Figure MD-2 in section 6 of this manual).
  • Page 43 VS1 Troubleshooting Manual Responding to alarms 2. Using a digital multimeter, check the continuity between each drain lead of the FET (positive meter probe) and the metal flange of the FET (negative meter probe). – If the measurement is open circuit, the PA PWB is OK and does not require replacement.

  • Page 44: Pre-Amp/Ipa Pwb Replacement

    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 palette and...
  • Page 45 VS1 Troubleshooting Manual Responding to alarms 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 Belleville washers...
  • Page 46 VS1 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) Page 1-38 Issue 10.0 2018-10-29...

  • Page 47: Power Supply Module Replacement

    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 48: +48 V Power Supply Replacement

    4. Disconnect wires # 7, 8, 9, 12 and 13 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 two mounting brackets on the new power supply and reverse...

  • Page 49: Cooling Fan Replacement

    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. 3115RL-07W-B79-E51).
  • Page 50 VS1 Troubleshooting Manual Responding to alarms Figure 1.5: Fan Bracket Removal Cooling fan bracket assembly Page 1-42 Issue 10.0 2018-10-29...

  • Page 51: Exciter/Control Pwb Replacement

    VS1 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 52 VS1 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 Page 1-44 Issue 10.0 2018-10-29...
  • Page 53 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 54: Ps Distribution Pwb Replacement

    5. Use a 5.5 mm nut driver to remove the six M3 nuts, split and flat washers that secure the PS distribution PWB to the transmitter. Retain hardware. 6. Remove the PS distribution PWB from the transmitter. 7. Locate or obtain a replacement PS distribution PWB (Nautel Part # NAPS41A). Reverse Step 1 through Step 6 to reinstall the new PS distribution PWB.

  • Page 55: 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 # NAPI136). Reverse Step 1 through...
  • Page 56 VS1 Troubleshooting Manual Responding to alarms Page 1-48 Issue 10.0 2018-10-29...

  • Page 57: Detailed Circuit Descriptions

    Pre-amp/IPA PWB (NAPA28B) - see page 2-3 • Power amplifier PWB (NAPA23/03A) - see page 2-4 VS1 electrical schematics The descriptions in this section all refer to the VS1 electrical schematics listed in Table 5.1 on page 5- of the VS1 Troubleshooting Manual. Exciter/control PWB (NAPE87B) Detailed theory for the exciter/control PWB (A1) is not included in this manual.

  • Page 58: Ps Distribution Pwb (Naps41A)

    See electrical schematic Figure SD-3. Interfacing The PS distribution PWB provides the interface between the VS1’s power supplies and the rest of the transmitter. It passes: – ac voltage from the AC INPUT (U1) to the power supply module (U2).

  • Page 59: Pre-Amp/Ipa Pwb (Napa28B)

    VS1 Troubleshooting Manual Detailed Circuit Descriptions LVPS Two +48 V to +5 V dc-dc converters (U2 and U12) and their associated components generate the +5 V rail that is applied to circuitry throughout the transmitter. A +48 V to +15 V converter (U1) and its associated components generate the +15 V that is applied to the exciter/control PWB.

  • Page 60: Power Amplifier Pwb (Napa23/03A)

    VS1 Troubleshooting Manual Detailed Circuit Descriptions The Pre-amp Bias input voltage is provided by the exciter/control PWB to establish a dc bias current for Q1. The IPA Bias input voltage is provided by the exciter/control PWB to establish a dc bias current for Q2.

  • Page 61: Parts Lists

    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 62: 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 VS1’s overall parts list, or the top block in the family tree shown in Figure 3.1 on page 3-4...

  • Page 63: 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. Description column The Description column contains the name and descriptive information for each part.
  • Page 64 VS1 Troubleshooting Manual Parts Lists Figure 3.1: VS1 Family Tree 1 KW FM BROADCAST TRANSMITTER NARF65I and NARF65I/01 EXCITER/CONTROL PWB POWER SUPPLY DISTRIBUTION PWB INTERFACE PWB SPLITTER PWB NAPE87B NAPS41A PR42D NAPH01B A7 - A9 PRE-AMP/IPA PWB POWER AMPLIFIER 1 PWB...

  • Page 79: Wiring/Connector Lists

    VS1 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 80 Table 4.1: Wiring Lists Provided Table # Description Table 4.3 Wiring List - VS1 Transmitter (page 4-3) Table 4.2: Connector Mating Information Provided Table # Description Table 4.4 Connector Mating Information - VS1 Transmitter (page 4-5) Page 4-2 Issue 10.0 2018-10-29...
  • Page 81 VS1 Troubleshooting Manual Wiring/connector lists Table 4.3: Wiring List - VS1 Transmitter Source Destination Wire # Colour Size Remarks Grey Grey U1-GND Grn/Yel Grey Grey U3-L Grey U3-N Grey U3-GND Grn/Yel A2E3 Grn/Yel A2E3 A2E5 Grn/Yel U3-(+V) A2TB2-1 White U3-(-V)
  • Page 82 VS1 Troubleshooting Manual Wiring/connector lists Table 4.3: Wiring List - VS1 Transmitter Source Destination Wire # Colour Size Remarks A4-P A9-G Shield 50 Ohm Coax A10-DD A10-X Conductor 50 Ohm Coax A10-EE A10-Y Shield 50 Ohm Coax A10-CC A10-W Conductor...
  • Page 83 VS1 Troubleshooting Manual Wiring/connector lists Table 4.4: Connector Mating Information - VS1 Transmitter Connector Mate Remarks U1-L AC L1 in U1-N AC L2/N in CB1P1 CB1 L1 in CB1P2 CB1 L2/N in CB1-3 CB1 L1 out CB1-4 CB1 L2/N out...
  • Page 84 VS1 Troubleshooting Manual Wiring/connector lists Page 4-6 Issue 10.0 2018-10-29...

  • Page 85: Reading Electrical Schematics

    • 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 86: Unique Symbols

    VS1 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 87: 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., NAPA23/03A PA PWB ). Note the reference designations and Nautel nomenclatures of all higher assemblies in the path, if applicable.

  • Page 88: 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 NAPA23/03A PA PWB . Note: The drawings in the Mechanical Drawings section depict the assembly detail of the transmitter and its modules and assemblies.
  • Page 89 EXTERNAL HD UPGRADE RX (-) EXCITER HD DATA (+) PILOT SAMPLE OUT HD DATA (-) +15V OUT +15V OUT FROM EXTERNAL 10 MHz IN SOURCE S2110124 V4 Figure SD-1: VS1 Transmitter - Ac-Dc and Exciter/Control Stages Issue 10.0 2018-10-29 SD-1...
  • Page 90 COMBINER FLTR 10.0K INTERFACE VRMS FWD PWR SAMPLE REFLD REFLD PWR RF_IN ENBL 1000 0.01 SMPL ADL5501 FLTR 10.0K VRMS REFLD PWR SAMPLE S2110141 V1 Figure SD-2: VS1 Transmitter - RF Drive and RF Power Stages Issue 10.0 2018-10-29 SD-2...
  • Page 91 TP22 PA 2 V + V CTRL PS CTRL V PS CTRL V 0.005 0.01 PA 3 V + TP24 0.005 INH A PA 4 V + # PS A INHIBIT + # PS A INHIBIT + 0.005 0.01 PA 1 V + TP23 INH B 0.01...
  • Page 92 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 93 PA V 1000 470pF PA BIAS 0.01 T3:A Q1:A STAC2942B T2:B RF OUTPUT RF DRIVE INPUT 0.001 0.001 27pF 0.01 0.01 Q1:B STAC2942B 56pF T3:B T2:A 27pF S2110139 V1 0.01 47.5K Figure SD-5: NAPA23/03A PA PWB Issue 10.0 2018-10-29 SD-5...

  • Page 94: Mechanical Drawings

    3-1. Follow the family tree branches to the block that contains the desired reference designation and Nautel nomenclature (e.g., NAPA23/03A PA PWB ). Note the reference designations and Nautel nomenclatures of all higher assemblies in the path, as applicable. Example: A6 NAPA23/03A PA PWB .
  • Page 95 Then, repeat this procedure until the desired part or assembly is found. Table 6.1: List of Mechanical Drawings Figure # Title MD-1 VS1 Transmitter (Front, Rear and Top Views) MD-2 VS1 Transmitter (Bottom and Side Views) MD-3 NAPE87B Exciter/Control PWB MD-4...
  • Page 96 TOP VIEW (COVER REMOVED) EXCITER/ CONTROL DISTRIBUTION LPF PWB POWER SUPPLY MODULE FRONT VIEW REAR VIEW Figure MD-1: VS1 Transmitter (Front, Rear and Top Views) Issue 10.0 2018-10-29 MD-1...
  • Page 97 BOTTOM VIEW (COVER REMOVED) +48 V POW- ER SUPPLY MODULE COMBINER INTERFACE COMBINER MOUNTING PRE-AMP/ IPA PWB MOUNTING PA PWBs (A6 - A9) SPLITTER INTERFACE RIGHT SIDE VIEW Figure MD-2: VS1 Transmitter (Bottom and Side Views) Issue 10.0 2018-10-29 MD-2...
  • Page 98 L124 (LOWER) (LOWER) L103 L132 U120 L144 L125 R448 R455 (UPPER) (UPPER) R48 R51 R221 R237 U105 R235 R458 C165 C562 C138 R129 C419 C235 R456 R139 R238 R348 R449 C415 L157 C563 C166 R349 C226 R262 C314 C412 R140 R239 R442 C286...
  • Page 99 +15V (7A) TP17 +48V +48V IPA V PRE-AMP PS DISTRIBUTION TP21 NAPS41 +5V-A SER. +5V-B TP10 TP14 +4.096V AC B TMPA TP18 TP11 R7 C34 AC A TMPB TP12 TP20 FAIL A PA 4 TP13 TP15 TP16 FAIL PA 1 TP19 PA 3 PA 2...
  • Page 100 (U/S) SPLITTER NAPH01 SER. M2110140 V1 Figure MD-5: NAPH01B Splitter PWB Issue 10.0 2018-10-29 MD-5...
  • Page 101 211-1121 PR36 ISS.B FRONT PRE-AMP/IPA NAPA28 SER. M2110064 V1 Figure MD-6: NAPA28B Pre-Amp PA PWB Issue 10.0 2018-10-29 MD-6...
  • Page 102 Figure MD-7: NAPA23/03A PA PWB Issue 10.0 2018-10-29 MD-7...
  • Page 103 COMBINER NAPH02 SER. M2110059 V1 Figure MD-8: NAPH02A Combiner PWB Issue 10.0 2018-10-29 MD-8...
  • Page 104 LOW PASS FILTER NAPF12 SER. M2110062 V1 Figure MD-9: NAPF12 RF Low Pass Filter PWB Issue 10.0 2018-10-29 MD-9...
  • Page 105 REFLD SMPL SMPL (U/S) COMBINER INTERFACE NAPI136 SER. IPA FWD SMPL M2110061 V1 Figure MD-10: NAPI136 Combiner Interface PWB Issue 10.0 2018-10-29 MD-10...

  • Page 106: 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 of a AES-EBU. 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 107 VS1 Troubleshooting Manual List of terms A setting that controls power level, frequency and audio parameters. The VS1 allows you to Preset. pre-program multiple presets. Printed Wiring Board. PWB. A complete, but temporary loss of RF output power, caused by any one of a variety of Shutback.
  • Page 109 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 2018 NAUTEL. All rights reserved.

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