NG1000 Troubleshooting Manual Table of contents Contents Release control record About this manual About safety Safety precautions xvii Responding to alarms Corrective maintenance Electrostatic protection Identifying an alarm Power Supply Module Replacement 1-17 +48 V Power Supply Replacement 1-18 Cooling fan replacement...
Page 6
NG1000 Troubleshooting Manual Table of contents Bandpass Filter Replacement 1-32 Ac surge protector MOV Replacement 1-33 Parts Lists Parts information Family tree How to locate information about a specific part Column content OEM code to manufacturer’s cross-reference Common abbreviations/acronyms Wiring/connector lists...
Page 7
NG1000 Troubleshooting Manual Table of contents List of terms Issue 0.4 2010-10-12 Page vii...
Page 8
NG1000 Troubleshooting Manual Table of contents Page viii Issue 0.4 2010-10-12...
NG1000 Troubleshooting Manual About this manual This manual provides troubleshooting information for the NG1000 transmitter. It is intended for use by field technicians. This manual allows the troubleshooting technician to diagnose a fault to the system level, using alarm response procedures, parts lists, wiring lists, and electrical schematics.
The Nautel website provides useful resources to keep you up to date on your NG1000. Nautel User Group (NUG) The website includes a special section that customers can log into in order to access the Nautel customer newsletter, product manuals, frequently asked questions (FAQ), information sheets, and information about field upgrades.
Page 13
NG1000 Troubleshooting Manual • To search a document to find keywords, use Find in Acrobat Reader’s Edit menu. • To quickly find a specific section, click the section in the PDF file’s Bookmarks list. When using printed documents: • When navigating between manuals of the documentation suite, note the tabbed module labels (1 through 4) for each manual (see “NG1000 transmitter...
Page 14
NG1000 Troubleshooting Manual Page xiv Issue 0.4 2010-10-12...
NG1000 Troubleshooting Manual About safety All Nautel transmitters are designed to meet the requirements of EN60215, Safety Requirements for Radio Transmitters. The philosophy of EN60215 is that the removal of any cover or panel that can only be opened using a tool is a maintenance activity, and that any person performing a maintenance activity is expected to be trained for that activity.
Page 16
NG1000 Troubleshooting Manual Lightning hazards Before opening the transmitter and touching internal parts, remove and solidly ground the antenna connection. WARNING: It is not enough to ground the antenna terminal with the antenna still connected. Even a small impedance in the ground strap will result in lethal voltages during a lightning strike.
Personnel must be familiar with the transmitter, so that they can avoid physical danger, and be aware of hazards to themselves and the equipment. Nautel offers a number of training courses covering the basic fundamentals of RF systems and transmitters, and the operation and maintenance of the transmitter. For more information about available courses and schedules, go to the Nautel website at http://www.nautel.com/Training.aspx,...
Page 18
Operation of safety interlocks (if installed) First aid Nautel does not offer first aid training, since the hazards associated with high voltage and RF energy are not specific to the transmitter. However, the customer should provide first aid training to all per- sonnel who have access to the transmitter site.
Page 19
NG1000 Troubleshooting Manual Marking hazards Place warning signs close to any hazardous areas or systems (e.g., the feedline or the antenna system). Make the signs large enough that they cannot be missed. Provide signage in all languages used in the region.
Page 20
(and to protect the rest of your site equipment and your personnel). For detailed information about lightning protection, see the Nautel Site Preparation Manual, available from your Nautel sales agent, or online from the Nautel website.
Page 21
NG1000 Troubleshooting Manual Earthquake protection If the transmitter site is in a region that experiences any noticeable earthquake activity, take steps to prevent the transmitter from shifting or rocking during an earthquake. Even during minor earthquakes, rocking or movement of the transmitter is likely to damage the feedline connection, and could even cause a catastrophic failure of the ac power feed into the transmitter.
• Electrostatic protection - see page 1-3 • Identifying an alarm - see page 1-4 If none of the procedures and alarms described in this section address your problem, contact Nautel for assistance. See “Technical support” on page Corrective maintenance Corrective maintenance procedures consist of identifying and correcting defects or deficiencies that arise during transmitter operation.
Page 24
NG1000 Troubleshooting Manual Responding to alarms be enabled (if one is available). It is recommended that the significance of remote indications, and the appropriate responses, be incorporated into a station's standard operating procedures. Refer to “Identifying an alarm” on page 1-4 to determine the remedial action required for a given fault.
NG1000 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.
NG1000 Troubleshooting Manual Responding to alarms Identifying an alarm The best way to identify an alarm is by viewing the front panel of the system controller (A1), and in some cases the front panel of the VHF transmitters (A2 and A3).
Page 27
NG1000 Troubleshooting Manual Responding to alarms VHF transmitter status LEDs The front panel of each VHF transmitter contains three LEDs that aid in isolating an active fault - TRANSMITTER STATUS , antenna and load (see Figure 1.2). The TRANSMITTER STATUS LED and one of the antenna or load LED will always be on.
Page 28
3. If troubleshooting and subsequent replacement of a suspect PWB or module causes the alarm to disappear from the Alarms screen, the alarm has been succesfully cleared. 4. If troubleshooting and subsequent replacement of a suspect PWB or module does not remove the fault condition, contact Nautel. Page 1-6 Issue 0.4 2010-10-12...
Page 29
NG1000 Troubleshooting Manual Responding to alarms Table 1.1: Troubleshooting Alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action System Controller Generated Faults AIn1(J11A-11) Fault EXTERNAL This alarm occurs when the analog input applied to the auxiliary analog input 1 (pin 11 on AUX I/O connector A1J11A) is in an alarm sensing condition, based on a threshold defined by the user.
Page 30
NG1000 Troubleshooting Manual Responding to alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action Coax Switch Fault EXTERNAL This alarm occurs when the RF coaxial switch’s position does not agree with the desired switch position command. The system RF output is inhibited by opening the associated transmitter interlock circuits.
Page 31
NG1000 Troubleshooting Manual Responding to alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action Sys Con +5V Fault CONTROLLER This alarm occurs when the system controller’s +5 V power supply’s output voltage is outside the acceptable range of 4.7 V to 5.3 V. Suspect a possible fault with the +5 V supply circuitry on the system controller PWB (A1).
Page 32
NG1000 Troubleshooting Manual Responding to alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action Transmitter Generated Faults TXA (or TXB) AC TRANSMITTER A This alarm occurs when an associated transmitter’s Fault TRANSMITTER B power supply module (U3 or U4) detects a PS Ac Fail, caused when the input ac voltage is less than 180 V ac or above 264 V ac.
Page 33
NG1000 Troubleshooting Manual Responding to alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action TXA (or TXB) Ext TRANSMITTER A This alarm occurs when the external interlock circuit Interlock TRANSMITTER B for the associated transmitter is not closed, inhibiting the transmitter’s output.
Page 34
NG1000 Troubleshooting Manual Responding to alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action TXA (or TXB) IPA TRANSMITTER A This alarm occurs when the associated transmitter’s Output Low TRANSMITTER B IPA output power is less than 40% of the set point level (set point = 150 W;...
Page 35
NG1000 Troubleshooting Manual Responding to alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action TXA (or TXB) TRANSMITTER A This alarm occurs when the associated transmitter’s Preamp/IPA Fail TRANSMITTER B IPA has been flagged with a failure condition, due to a current reading that is less than 50% of nominal or greater than 150% of nominal.
Page 36
NG1000 Troubleshooting Manual Responding to alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action TXA (or TXB) Running TRANSMITTER A This alarm occurs when the associated transmitter is Bias TRANSMITTER B running its biasing routine, during which time it cannot produce RF power.
Page 37
NG1000 Troubleshooting Manual Responding to alarms Alarm (with Prefix) Alarm/Status LED Description and Troubleshooting Action TXA (or TXB) +5V Fail TRANSMITTER A This alarm occurs when the +5 V power supply TRANSMITTER B measured on the exciter/control PWB is outside the acceptable range of 4.7 V to 5.3 V.
Page 38
NG1000 Troubleshooting Manual Responding to alarms Table 1.2: Module Replacement Module Location Replacement Procedure Power Supply Module VHF Transmitter A and B page 1-17 +48 V Power Supply VHF Transmitter A and B page 1-18 Cooling Fans VHF Transmitter A and B...
4. Slide the power supply module toward the front of the VHF transmitter to disengage it from its mating connector. 5. Remove the power supply module from the transmitter. 6. Locate or obtain a replacement power supply module (Nautel Part # UG69A). Reverse Step 1 through Step 5 to reinstall the new power supply module.
5. Remove the +48 V power supply from the VHF transmitter and remove its brackets for use with the new power supply. 6. Locate or obtain a replacement power supply module (Nautel Part # UG54). Install the brackets on the new power supply and reverse...
4. Slide the cooling fan assembly up and out of the transmitter chassis. 5. Remove the defective fan(s), noting they are secured using M3 screws. Retain hardware. 6. Obtain a replacement fan (Nautel Part # 216-8011) from the site spares kit, if purchased, or contact Nautel to obtain a replacement fan.
M3 screws. 3. Disconnect all mating plugs from the exciter/control PWB (A1). Remove the D-sub connector’s securing screws using a 5 mm socket (Nautel Part # HAS80, provided in the ancillary kit).
5. Use a 5.5 mm nut driver to remove the five 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 VHF transmitter. 7. Locate or obtain a replacement PS distribution PWB (Nautel Part # NAPI124). Reverse Step 1 through Step 6 to reinstall the new PS distribution PWB.
5. Remove the four M3 screws that secure the LED PWB to the transmitter’s front panel. Retain hardware. 6. Remove the LED PWB from the VHF transmitter. 7. Locate or obtain a replacement LED PWB (Nautel Part # NAPX40). Reverse Step 1 through Step 6 to reinstall the new LED PWB.
M3 screws. 6. Disconnect all mating plugs from the system controller PWB (A1A1). Remove the D-sub connector’s securing screws using a 5 mm socket (Nautel Part # HAS80, provided in the ancillary kit).
Retain hardware. 7. Remove the button/LED PWB from the system controller, noting many of its parts protrude through the front panel. 8. Locate or obtain a replacement button/LED PWB (Nautel Part # NAPX39). Reverse Step 1 through Step 7 to reinstall the new button/LED PWB.
6. Remove the four M3 screws that secure the front panel display assembly (also referred to as VFD) to the system controller’s front panel. Retain hardware. 7. Remove the front panel display assembly from the system controller. 8. Locate or obtain a replacement front panel display (Nautel Part # UW118). Reverse Step 1 through Step 7 to reinstall the new front panel display.
W3P2 from the RF coaxial switch. 4. Remove the switch bracket, noting it is secured using M4 hardware. Retain hardware to install the new switch on this bracket. 5. Locate or obtain a replacement RF coaxial switch (Nautel Part # KC78). Reverse Step 1 through Step 4 to reinstall the new RF coaxial switch.
3. Remove the audio surge protector from the system cabinet, noting it is secured using four M4 screws. Retain hardware to install the new audio surge protector. 4. Locate or obtain a replacement audio surge protector (Nautel Part # UE60). Reverse Step 1...
2. Loosen the customer access screw and open U8’s access cover. 3. Remove the protective rubber warning cover to allow access to the Nautel installed wiring inside U8. Remove the red and green wire pairs (#s 116 and 117) from U8-R and U8-G.
4. Remove the mounting bracket from the ROAMS unit, noting it will be required to mount the new ROAMS unit. 5. Locate or obtain a replacement ROAMS unit (Nautel Part # UX134). Remove its front panel to allow installation of the mounting bracket. Reverse...
9. Unscrew the connection between A4J1 and U2-Output. Remove the directional coupler and its mounting bracket from the mounting plate. Remove the directional coupler from its mounting bracket by removing four screws. 10. Locate or obtain a replacement directional coupler (Nautel Part # NAFP111). Reverse Step 1 through Step 9 to reinstall the new directional coupler.
27 mm (or 1-1/16 in) open-end wrench. Remove the directional coupler and its bracket. 9. Remove the four self-tapping screws that secure the bandpass filter to the mounting plate. 10. Locate or obtain a replacement bandpass filter (Nautel Part # UM80). Reverse Step 1...
3. Remove the defective MOV, noting it is secured using two M6 nuts. Use a 10 mm nut driver to remove these nuts. Retain hardware. 4. Locate or obtain a replacement MOV (available from Nautel; Part # UM97). Reverse Step 1...
Refer to the appropriate family tree (Figure 2.1 or 2.2) and identify the block(s) associated with the Nautel nomenclature. At the bottom of the main family tree block, a reference is made to “See Part Number Index Tables”. Locate the part's reference designation in the identified reference designation list in this section, noting they are sorted alphanumerically.
Nautel part To obtain the full reference designation for a specific part the Nautel configuration control number must be located in the appropriate family tree (Figure 2.1 or 2.2) to include the reference designation of all higher level assemblies.
Nautel's normal supply source for that part. Note: OEM code 37338 is listed for parts manufactured by Nautel or to a Nautel control drawing. United States of America customers should refer all replacement part orders to Nautel Maine Incorporated (OEM code 57655).
NG1000 Troubleshooting Manual Parts Lists Common abbreviations/acronyms The following abbreviations/acronyms may appear in the Description of Part column: • Denotes item is designed to be installed using Surface Mount Technology. • Denotes item is a Mass Termination Assembly connector. •...
Page 62
NG1000 Troubleshooting Manual Parts Lists Table 2.1: OEM Codes / Manufacturers OEM Code Manufacturer OEM Code Manufacturer PANAS Panasonic SL575 Meanwell Sales Information PHOENIX See 5Y407 See 54583 SARONIX Saronix TEXAS See ER737 SAW84 IEI Technology Corp. U3040 ST Microelectronics...
Page 63
NG1000 Troubleshooting Manual Parts Lists Figure 2.1: Family Tree - NG1000 Transmitter System NG1000 WEATHER RADIO TRANSMITTER SYSTEM, 1000 W NARF63 SYSTEM CONTROLLER VHF TRANSMITTER 'A', 1250 W VHF TRANSMITTER 'B', 1250 W DIRECTIONAL COUPLER ASSY NAX251 NARF62 NARF62 NAFP111 (SEE FIGURE 2.2)
Page 64
NG1000 Troubleshooting Manual Parts Lists Figure 2.2: Family Tree - 1250 W Transmitter TRANSMITTER, VHF, WEATHER RADIO, 1250 W NARF62 EXCITER/CONTROL PWB PS DISTRIBUTION PWB (DUAL) INTERFACE PWB SPLITTER PWB (1250 W) NAPE82 NAPI124 PR17A NAPI127 COMBINER, LPF, PROBE PWB (1250 W)
Page 65
OEM CODE Conn, Coax, BNC, Plug,50ohm,Crmp,RG58/303 JF33 31-4320 02660 Conn, Coax, BNC, Plug,50ohm,Crmp,RG58/303 JF33 31-4320 02660 216-7020 AC Distribution Assy (NG1000) REFDES DESCRIPTION NAUTEL # VENDOR # OEM CODE DS01 LED, Pilot Light, Amber, 230Vac BAP44 LEDTECA220AC Receptacle, 250VAC, 15A, Single, NEMA 6-15R...
Page 73
Continued from previous page NAPA26 Pre-Amp/IPA PWB Assy - NOAA REFDES DESCRIPTION NAUTEL # VENDOR # OEM CODE Bead, Ferrite, SMT, 47ohm,2.85mm H x 5.10mm Lg LA57 2743019447 34899 Bead, Ferrite, SMT, 95 ohm,2.85mm H x 9.6mm Lg LA56 2743021447 34899 Inductor, used with PA NAPA16 &...
Page 96
Continued from previous page NAPE82 Exciter/Control PWB Assy-NOAA REFDES DESCRIPTION NAUTEL # VENDOR # OEM CODE R184 Resistor,SMT,MF,0.0ohms,Jumper,0603 RFFS01 RK73Z1JLTD 59124 R185 Not Used NOT USED 37338 R186 Not Used NOT USED 37338 R187 Resistor,SMT,MF,100ohms,1%,1/10W,0603 RFFS26 RK73H1JLTD1000F 59124 R188 Resistor,SMT,MF,100ohms,1%,1/10W,0603...
NG1000 Troubleshooting Manual Wiring/connector lists Section 3: 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 3.1 on page 3-2 lists the tables containing wiring information.
Page 114
(page 3-5) Table 3.7 Wiring List - NARF62 VHF Transmitter, 1250 W (page 3-6) Table 3.9 Wiring List - Ac Distribution Assembly (Nautel Part # 216-7020) (page 3-9) Table 3.2: Connector Mating Information Provided Table # Description Table 3.4 Connector Mating Information - NG1000 Transmitter System...
Page 115
P16-4 Green 4 Conductor U8-R P16-3 4 Conductor U8-G P16-4 Green 4 Conductor U8-G Green/Yellow Table 3.4: Connector Mating Information - NG1000 Transmitter System Connector Mate Remarks A1A1J4 A2A1J5 A1A1J5 A3A1J5 A1A1J11B U6-I/O Connector A1A1J12 U5-DC INPUT P8 is on AC/DC adapter cable supplied with U5.
Page 116
NG1000 Troubleshooting Manual Wiring/connector lists Table 3.4: Connector Mating Information - NG1000 Transmitter System Connector Mate Remarks A3A1J4 Red tape A3A1J6 Yellow tape U5-Telephone Jack U7P1 A5J3 Ac plug end U7P2 U6-Power Dc plug end W1P1 A1A1J9A W1P2 A2A1J2 W2P1...
Page 118
NG1000 Troubleshooting Manual Wiring/connector lists Table 3.7: Wiring List - NARF62 VHF Transmitter, 1250 W Source Destination Wire # Colour Size Remarks White White U1-E (GND) Grn/Yel White White Grn/Yel U2-L White U2-N White U2-G Grn/Yel White White Grn/Yel U2-(+V)
Page 119
NG1000 Troubleshooting Manual Wiring/connector lists Table 3.7: Wiring List - NARF62 VHF Transmitter, 1250 W Source Destination Wire # Colour Size Remarks C7-B A15-B White C8-B A16-B White A4-EE A8-D White Jumper A4-A A8-A Jumper A4-B A8-B Jumper A4-C A8-C...
• 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.
NG1000 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.
Section 3, “Parts Lists” on page 3-1. Follow the family tree branches to the block that contains the desired reference designation, and associated Nautel nomenclature (e.g., NAPC157 System Controller PWB ). Note the reference designations and Nautel nomenclatures of all higher assemblies in the path.
Page 126
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. Example: A1 NAX251 System Controller > A1A1 NAPC157 System Controller PWB .
Page 127
Table 4.1: List of Electrical Schematics Figure # Title SD-1 NG1000 System - Ac Distribution (Sheet 1 of 2) SD-2 NG1000 System - Transmitters and System Controller (Sheet 2 of 2) SD-3 NAX251 System Controller SD-4 NAPC157 System Controller PWB (Sheet 1 of 3) SD-5...
Page 129
240VAC 240VAC 120VAC 120VAC W14P1 W14P1 LINE LINE GROUND SYSTEM GROUND SYSTEM CONTROLLER CONTROLLER LINE/NEUTRAL LINE/NEUTRAL LINE 1 NEUTRAL NEUTRAL LINE 1 (120VAC) S2160013 V2 Figure SD-1: NG1000 System - Ac Distribution (Sheet 1 of 2) Issue 0.4 2010-10-12 SD-1...
Page 130
DIAL-UP CONNECTION A1J2 A1J9B # TX OK - SPARE IN ROAMS POWER U7P2 POWER 120VAC FEED SUPPLY W12P2 XMTR 2 240VAC FEED S2160068 V1 Figure SD-2: NG1000 System - Transmitters and System Controller (Sheet 2 of 2) Issue 0.4 2010-10-12 SD-2...
Page 131
PART OF PART OF PART OF PART OF BUTTON / LED SYSTEM BUTTON / LED SYSTEM CONTROLLER PWB CONTROLLER PWB W1P2 W1P1 W1P1 W1P2 USB V+ # EXT LED RED - AUDIO (+) FWD PWR SAMPLE USB D- # EXT LED GRN - TO XMTR A USB D+ # CTRL LED RED -...
Page 135
IPA VOLTS PA VOLTS 2 U1-L S1P1 S1-3 PA VOLTS 4 FROM AC LINE POWER SOURCE U1-GND PA VOLTS 6 (180-264VAC) LINE/NEUTRAL U1-N S1P2 S1-4 (47-63 Hz) PA VOLTS 8 POWER SUPPLY PA VOLTS 1 MODULE PA VOLTS 3 +48V POWER SUPPLY +VE SENSE PA VOLTS 5...
Page 136
PA 1 V PA 2 V **L2 PA 3 V **L3 PA 4 V **L4 PA 5 V **L5 PART OF PA 6 V **L6 PA 7 V **L7 COMBINER/ PA 8 V **L8 LPF/PROBE PWB IPA V **L9 PA 1 V PA 1 BIAS IN PA 1 BIAS OUT PA 1 RF DRIVE...
Page 142
TP11 PA V 1 V CTRL +48V IPA V 0.005 PS CTRL V + 13 PS A CTRL V+ TP20 0.005 IPA CUR PA V 3 0.01 0.01 PS B CTRL V+ INH A 0.005 0.01 10.0K MAX4080SASA # PS INHIBIT A + # PS A INHIBIT + PA V 5 IPA_CURRENT...
Section 3, “Parts Lists” on page 3-1. Follow the family tree branches to the block that contains the desired reference designation and Nautel nomenclature (e.g., NAPC157 System Controller PWB ). Note the reference designations and Nautel nomenclatures of all higher assemblies in the path.
Page 147
Then, repeat this procedure until the desired part or assembly is found. Table 5.1: List of Mechanical Drawings Figure # Title MD-1 NG1000 Weather Radio Transmitter System MD-2 NAX251 System Controller MD-3 NAPC157 System Controller PWB MD-4...
Page 148
A (A2) and B (A3) UNIT COUPLER FILTER LOAD RF COAXIAL SWITCH DATA LINE SURGE PROTECTOR AUDIO SURGE MODEM PROTECTOR TOP VIEW RIGHT SIDE VIEW FRONT VIEW (REAR DOOR OPEN) Figure MD-1: NG1000 Weather Radio Transmitter System Issue 0.4 2010-10-12 MD-1...
Page 149
SYSTEM CONTROLLER BUTTON/LED TOP VIEW FRONT VIEW VFD DISPLAY Figure MD-2: NAX251 System Controller Issue 0.4 2010-10-12 MD-2...
Page 150
R100 CR23 CR10 R139 CR15 C105 R54 R58 R129 R101 R130 R128 R55 R59 SYSTEM CONTROLLER R103 NAPC157 SER. R83 R87 CR16 R64 R68 R104 CR13 R117 R113 R120 R112 C20 C26 STATUS R118 R114 S D G R121 R111 R131 CR34 CR29...
Page 151
TRANSMITTER A RF ON LOCAL SELECT (U/S) (U/S) (U/S) (U/S) (U/S) TRANSMITTER B (U/S) (U/S) BUTTON/LED NAPX39 CONTROLLER SER. (U/S) RF OFF REMOTE BACK DOWN (U/S) (U/S) (U/S) (U/S) (U/S) EXTERNAL (U/S) M2160037 V1 Figure MD-4: NAPX39 Button/LED PWB Issue 0.4 2010-10-12 MD-4...
Page 152
POWER SUPPLY +48 V POWER COMBINER COMBINER/LPF/ PS DISTRIBUTION PWB PRE-AMP/ COOLING SPLITTER MODULES SUPPLY MODULE INTERFACE PWB PROBE PWB FANS TOP VIEW EXCITER/CONTROL PA PWBs BOTTOM VIEW A9 = PA1, A10 = PA2, A11 = PA3, A12 = PA4 A13 = PA5, A14 = PA6, A15 = PA7, A16 = PA8 INTERFACE PWB RIGHT SIDE...
Page 154
TP22 +15V PS INTERFACE B PS DISTRIBUTION (DUAL) PS INTERFACE A TP18 +4.096V NAPI124 SER. AC B TP17 AC A TP13 TP14 TP21 TP23 TP24 TP20 TP25 MP B FAIL PA V 7 PA V 5 PA V 3 PA V 1 +48V IPA V PA V 8...
Page 160
E1, E2 and E3 VISIBLE FROM UNDERSIDE ONLY Figure MD-13: Ac Distribution Assembly (216-7020) Issue 0.4 2010-10-12 MD-13...
Page 161
NG1000 Troubleshooting Manual List of terms Section 6: List of terms This section defines some of the terms that are used in Nautel documentation. A reduction in RF output power, caused by the occurrence of multiple shutbacks within a Cutback. pre-defined period.
Page 162
NG1000 Troubleshooting Manual List of terms Page 6-2 Issue 0.4 2010-10-12...
Need help?
Do you have a question about the NG1000 and is the answer not in the manual?
Questions and answers