SRT LAN radar sensor X-band down-mast Service Manual

Transcription

1 SRT LN radar sensor X-band down-mast Service Manual ENGLISH

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3 Preface Disclaimer s Navico is continuously improving this product, we retain the right to make changes to the product at any time which may not be reflected in this version of the manual. Please contact your nearest distributor if you require any further assistance. It is the owner s sole responsibility to install and use the equipment in a manner that will not cause accidents, personal injury or property damage. The user of this product is solely responsible for observing maritime safety practices. NVICO HOLDING S ND ITS SUBSIDIRIES, BRNCHES ND FFILITES DISCLIM LL LIBILITY FOR NY USE OF THIS PRODUCT IN WY THT MY CUSE CCIDENTS, DMGE OR THT MY VIOLTE THE LW. This manual represents the product as at the time of printing. Navico Holding S and its subsidiaries, branches and affiliates reserve the right to make changes to specifications without notice. Governing language This statement, any instruction manuals, user guides and other information relating to the product (Documentation) may be translated to, or has been translated from, another language (Translation). In the event of any conflict between any Translation of the Documentation, the English language version of the Documentation will be the official version of the Documentation. Copyright Copyright 2018 Navico Holding S. Trademarks Navico is a registered trademark of Navico Holding S. Simrad is used by license from Kongsberg. NME and NME 2000 are registered trademarks of the National Marine Electronics ssociation. Warranty The warranty card is supplied as a separate document. In case of any queries, refer to the brand website of your unit or system: Compliance statement Navico declare under our sole responsibility that the product conforms with the requirements of: European Council Directive 2014/90/EU on Marine Equipment modified by Commissioning Directive (EU) 2018/773 - Wheelmark The relevant declaration of conformity is available in the product s section at the following website: bout this manual Intended audience This manual is written for service engineers. The manual assumes that the reader has basic knowledge about this type of equipment in regards to: Maintenance work to be carried out Nautical terminology and practices Preface SRT LN radar sensor X-band down-mast Service Manual 3

4 Important text conventions Important text that requires special attention from the reader is emphasized as follows: ¼¼ Note: Used to draw the reader s attention to a comment or some important information!! Warning: Used when it is necessary to warn personnel that they should proceed carefully to prevent risk of injury and/or damage to equipment/ personnel. Change log Part no Date and description First version Safety precautions Safety precautions described in this section are applicable to the radar system. They are general safety precautions that are not related to any specific procedure, and they might therefore not appear elsewhere in this manual. They are recommended precautions that personnel must understand and apply during operation and maintenance of the system. You are obliged to read these operating instructions prior to operation, and to adhere to the operating instructions in order to prevent possible danger. Prevention of danger includes that operator personnel are trained and authorized for safe operation of the equipment. We assume no liability for damage due to improper operation which could have been prevented. The system must only be operated by persons who have passed the relevant mandatory training on the respective systems and applications. Only reading these operating instructions cannot replace such training. Persons authorized to operate, maintain and troubleshoot the system are instructed and trained by Simrad. Persons operating or servicing this radar system must be familiar with the general safety regulations and specific safety systems, and they must have passed all required training. They must have read the relevant operating instructions and manuals before starting to work. Have these operating instructions always at hand on all relevant locations, and ensure that copies are available to all operators. Operating personnel must at all times follow all safety regulations. During normal operation, the unit can be quickly disconnected from the main power line by turning OFF the relevant circuit breaker located on the electric switchboard. Do not replace components or make adjustments inside the unit when the voltage supply is turned ON. lways remove power and discharge to ground a circuit before touching it. Under no circumstances should any person initiate servicing or repairing the unit except in the presence of a qualified person. Ensure unobstructed access to all operator panels, controls, and relevant switchgear cabinets in order to enable instant response to alarms. Whenever it is necessary to disconnect the waveguide from a radar transmitter for maintenance purpose, the transmitter output should be terminated with a matched load. If this is not possible, care should be taken. Do not stand in front of an open-ended waveguide from which power is being radiated. ¼¼ Note: Main power is always present on the terminal board unless the main break from the power distribution panel of the vessel is turned off.!! Warning: Never look down a waveguide from which power is being radiated. 4 Preface SRT LN radar sensor X-band down-mast Service Manual

5 Warnings High voltage Radar equipment includes high voltage that can cause injury or loss of life. Danger exists only when the units are opened, exposing internal circuits, as when servicing the equipment. This radar has been carefully designed to protect personnel from possible injury from high voltages. lthough every effort has been made to eliminate danger to personnel, no responsibility is accepted for any injury or loss of life suffered in connection with this equipment. Radio frequency radiation Harmful effects (particularly to the eyes) may be caused by exposure of any part of the human body to high power radio frequency radiation. The system is however designed to always disable the microwave radiation when the antenna is not rotating. Configuration Distance 100 W/m2 point (m) Distance 50 W/m2 point (m) Distance 10 W/m2 point (m) 25 KW Transceiver 6 X-band ntenna 25 KW Transceiver 9 X-band ntenna 25 KW Transceiver 12 X-band ntenna X-Ray radiation This radar system does not generate X-ray radiation. Preface SRT LN radar sensor X-band down-mast Service Manual 5

6 Contents 8 Component overview 8 ntenna and pedestal 8 SRT LN down-mast transceiver 9 Component location 9 SRT PWR-DC PCB 10 SRT MOS PCB 10 SRT Control PCB 11 SRT Down adapter 11 RF Head 11 Noise diode 12 Magnetron 12 Circulator 12 Limiter 13 RF detector and LNFE 14 Preventive maintenance 14 External inspection of the radar sensor 14 Internal inspection of the pedestal 15 SRT transceiver component lifetime 16 Diagnostics 16 Controls and indicators 17 Checking the radar sensor 20 I/O Requirements 21 IEC61162 Transmission protocol 22 Data transmission error messages 23 Troubleshooting 23 Symptom table 23 ntenna missing data 24 Main possible failures 26 Fault repair 26 Magnetron replacement 27 RF detector and LNFE replacement 27 Limiter replacement 28 Noise diode replacement 29 Circulator replacement 29 Electronics assy disassembly 29 Circulator B replacement 31 Performance monitor diode replacement 32 SRT Mini-PSU PCB replacement 33 SRT LN CPU PCB replacement 33 Performance monitor arm replacement 34 Bearing reader PCB replacement 34 SRT D PCB replacement 35 Brushless controller replacement 35 Motor unit replacement 6 Contents SRT LN radar sensor X-band down-mast Service Manual

7 36 Gearbox reducer replacement 37 ntenna pedestal replacement 37 SRT LN down-mast transceiver replacement 39 Spare parts 40 System diagrams Contents SRT LN radar sensor X-band down-mast Service Manual 7

8 1 Component overview ntenna and pedestal F G E D B C B C D E F G Waveguide kit SRT Down-mast cable Grounding terminal Safety switch Radar performance monitor arm ntenna Pedestal Description SRT LN down-mast transceiver E B C D B C D E SRT down-mast cable Power cable Ethernet cable Grounding terminal Waveguide kit Description 8 Component overview SRT LN radar sensor X-band down-mast Service Manual

9 Component location G H I J C B E D O F L K M N Pedestal SRT LN down-mast transceiver Component Pedestal SRT LN down-mast transceiver Motor unit and gearbox B SRT D PCB C Bearing reader PCB D Brushless controller E Performance monitor arm F PCBs G Magnetron H Limiter I Noise diode J Circulator K Performance monitor diode L RF detector and LNFE M SRT Mini-PSU PCB N SRT LN CPU PCB O SRT down adapter PCB SRT PWR-DC PCB The SRT PWR-DC PCB is located to the left side when opening the cover of the SRT LN down-mast transceiver, behind SRT MOS PCB and SRT Control PCB and is therefore hidden from view. Its function is to generate the voltage necessary for the other parts of the apparatus. It is fed at 50 V. Component overview SRT LN radar sensor X-band down-mast Service Manual 9

10 SRT MOS PCB The SRT MOS PCB is located above SRT Control PCB. Its main function is to generate the pulses and voltages that are sent to the Magnetron. SRT Control PCB The SRT Control PCB is located underneath SRT MOS PCB on the left part of the apparatus. This PCB must only be programmed by technicians. For it to function, five voltages are necessary: +5V, -5V, +15V, -15V and +24V. 10 Component overview SRT LN radar sensor X-band down-mast Service Manual

11 SRT Down adapter The SRT Down adapter is located in the lower part of down-mast. Its function is to connect the transmitter to the pedestal X-band and the console by sending them signals and feed supplies. RF Head The RF Head is designed to generate RF pulses in the X-band range up to 25 kw and to receive echo from targets. The RF Head is composed of a solid state controller magnetron stage connected to a Circulator and ending with a flange to be connected to a waveguide in order to transfer the RF pulse to the ntenna for it to be radiated. In the 25 kw system, there is also a band pass filter included between the magnetron and the circulator to filter out spurious frequency emissions. The RF part of down-mast is composed of: Noise diode The magnetron The circulator The limiter LNFE + the RF detector Noise diode The noise diode is utilized to evaluate the performance of the radar. Its function is to generate a ring of noise on the radar video monitor to evaluate the performance. The characteristics of this ring can be modified from the console. Component overview SRT LN radar sensor X-band down-mast Service Manual 11

12 Magnetron The magnetron is the main component of the RF Head part of down-mast. Its function is to generate radio frequency pulses determined by the voltages received from the SRT MOS PCB. These pulses have an established frequency and being a down-mast X-band they can vary between 9375 MHz 9410 MHz and through the antenna are emitted externally. Circulator The circulator permits the output and input signals to travel correctly without being influenced and therefore generate errors. Limiter The limiter ensures that the LNFE is not burnt out and therefore suffer damage. t normal levels it has a normal impedance, but when the power is increased the impedance is also increased, a factor that protects the other apparatuses. 12 Component overview SRT LN radar sensor X-band down-mast Service Manual

13 RF detector and LNFE The LNFE (Low Noise Front End) is the instrument used to detect the start and the end of the various signals sent and the responses received so that useful data can be supplied and analyzed by the RF detector. The RF detector, the last instrument in the RF Head, interfaces with the SRT Control PCB. It amplifies the signals and generates data to activate the processes of the above-mentioned PCB (such as Tuning, Video, Monitor signals). Component overview SRT LN radar sensor X-band down-mast Service Manual 13

14 2 Preventive maintenance Follow the procedures that are described in this chapter to ensure the radar system operates at its optimum.! Warning: High voltage is present inside the unit. Do not open the cabinet cover before the main radar breaker has been turned to the off position. Switch off the power supply before connecting measurement instruments inside the unit.! Warning: Before starting any maintenance or repair work, it is mandatory that, for the safety of personnel, all high-voltage capacitors be short circuited by means of an insulated screwdriver or other suitable tool. Do not alter the setting of the semi-operative controls unless a specific adjustment is required and the necessary test equipment is available. ¼¼ Note: ll work performed on the transceiver must be recorded in the unit log book. External inspection of the radar sensor The operation is performed twice a year. 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position 4 Place a card at the radar controls stating unit is being serviced 5 Check that no parts of the plastic covering the up-mast transceiver have been painted 6 Check the state of the casing preservation 7 Unscrew and grease the 4 fastening screws of the cover to avoid corrosion and facilitate future inspections 8 If paint has been scratched off at any point Degrease the part to be painted Scuff lightly with emery paper Dust off with a dry brush pply a rust resistance paint system suited to harsh environments. Refer to paint supplier instructions for details 9 Switch the safety switch to the ON position 10 On the electric switchboard, set the radar main breaker to ON and remove the card reading 11 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Internal inspection of the pedestal This operation should be performed twice a year. 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position 4 Position the antenna so it is facing the bow of the vessel 5 Unscrew the four cover screws 6 Open the cover fully 7 Check for any signs of water ingress 14 Preventive maintenance SRT LN radar sensor X-band down-mast Service Manual

15 Connectors and cables inspection 1 Check the condition of all connector contacts (pins and plugs) 2 Clean with dry brush if necessary 3 Repair or replace any corroded or defect parts Mechanical inspection 1 Check the gear integrity 2 dd a thin coating of grease if the main gear shows lack of lubrication 3 Check that there are no loose screws inside the housing 4 Replace or tighten screws as necessary. General cleaning Internal cleaning is necessary only when a visible buildup of dirt is present. Use IP alcohol if necessary. Dry any damp surfaces by using a soft cloth. Final steps 1 Grease the fastening screws to prevent corrosion and ease future removal 2 pply a small amount of silicone grease to the O-ring to refresh the water sealing 3 Secure the cover in place 4 Switch the safety switch to the ON position 5 On the electric switchboard, set the radar main breaker to ON and remove the card reading 6 On the R5000 PSU, switch the power switch to the ON position and remove the card reading SRT transceiver component lifetime Description Qty Lifetime (hrs) M1458 X - band magnetron 25KW ! Warning: ll the components for the SRT transceiver must be replaced before the expected lifetime. Preventive maintenance SRT LN radar sensor X-band down-mast Service Manual 15

16 3 Diagnostics Controls and indicators There are various types of LEDs visible to the operator at the moment of disassembly at the front panel of the down-mast. Refer to the tables below for their description. PCB SRT Control (Serial config.) SRT Control (Serial config.) SRT Control (combined video config.) SRT Control (combined video config.) SRT Control (combined video config.) SRT Down adapter SRT Down adapter Code (Ref. SSY) LED Frequency Function D3 Green Slowly Green: OK status flashing Blue: Local Mode Red: Fail status D23 Red On/off The down-mast is transmitting normal D3 Green Gradually Green: OK status slow flashing Blue: Local Mode Red: Fail status D23 Green Off The down-mast is not transmitting data to the console D26 Green Fixed If Power supply on SRT PWR-DC PCB is > 42 V Red Off If Power supply on SRT PWR-DC PCB is < 38 V D4 Green On Presence of supply current Off Not presence of supply current D3 Red On Signal that the antenna is rotating Off No signal that the antenna is rotating LED D3 status If LED D3 is blinking red check for possible causes in the table below. Fail Configuration Cause Mag heater fail (L.P. + X-band) Vfil < 4.5 V and > 8 V 24 VCO fail 24 V(voltage) < 18 V and > 30 V +15 fail 15 V(voltage) < 14 V and > 16 V Rx fail No packet has been received after 5 seconds CRC fail There is a CRC failure in receiving a packet Interlock open The interlock might be open Safety switch open The safety switch might be open +24 fail < 18 V if power supply of SRT is 24 V +48 fail < 40 V if power supply of SRT is 48 V Front end fail Monitor voltage is < 40 mv and > 90 mv 16 Diagnostics SRT LN radar sensor X-band down-mast Service Manual

17 Checking the radar sensor Certain types of checks can be performed after opening the down-mast s front panel.! Warning: When the front panel of the down-mast is opened, the first safety switch called Interlock is activated. For extra safety, this spring switch which opens at the moment the panel is removed interrupts the transmission that disables the 700 V High Voltage that the SRT MOS PCB requires. To carry out a check simulating a closed panel, pull it towards the outside. Semi-operative controls Pos. Structure Code (Ref. SSY) Type Down-mast S1 Interlock SRT Control S1 10 Position rotary switch Function TXRX cover interlock switch for disabling the High Voltage generation and interrupts the transmission It selects the TXRX unit operation mode as follow: Pos. Function 0 SRT under external control 1 1 SRT under external control 2 2 SRT in local standby 3 The SRT works independently from the console with short pulses 4 The SRT works independently from the console with medium pulses 5 The SRT works independently from the console with long pulses 6 SRT in local with long pulse and performance monitor with auto tuning and antenna rotation 7 Standby mode 8 Standby mode 9 Service mode Long pulse. Performance monitor ON. utotune. ntenna rotating Diagnostics SRT LN radar sensor X-band down-mast Service Manual 17

18 SRT Control PCB test points Test points list Description Test points list Description TP1 HVON High voltage ON TP16 LINE Input voltage sense TP2 +5V TP17 TXCOMB Tx data signal in combined mode TP3 PWON OUT Test signial configurable TP5 +24 V Power supply from SRT PWR-DC PCB TP6 VCO IF tunable oscillator voltage TP7-15 V Power supply from SRT PWR-DC PCB TP8 +15 V Power supply from SRT PWR-DC PCB TP9 PWON OUT 24 V needed to switch on the system TP10 VFIL Magnetron heater voltage TP11-5 V Power supply from SRT PWR-DC PCB TP12 PRESTC Short range fixed attenuation TP13 NTS ntenna start output TP18 GND Ground TP19 VDIN Video input from RF detector PCB TP20 VDOUT Combined video output TP21 RX Serial data reception TP22 TX Serial data trasmission TP23 Z OUT ntenna azimuth output TP24 HL OUT ntenna heading line output TP25 TRPUSH Modulator trigger push control TP26 TRPULL Modulator trigger pull control TP27 Motor Motor current sense current TP14 TROUT Trigger output TP28 GND Ground TP15 RXCOMB Rx data signal in TP29 GND Ground combined mode 18 Diagnostics SRT LN radar sensor X-band down-mast Service Manual

19 Jumpers on SRT Control PCB Jumper Open Close J7 Serial mode transmission Video combined mode transmission J8* Warm-up 3 minutes before transmission No warm-up time J10 Unable to load the boot processor ble to load the boot processor. The link must be left open J21 One noise diode is used Two noise diodes are used * This jumper must always be open to allow the 3 minute warm-up. This time allows the magnetron to come up to temperature. The transaction s closing Jumper J8 can be performed only by a technician.! Warning: Remember after every operation performed on the jumper 8 to open it to allow for warmup. Color labels on SRT Control PCB: Red circles - Test points Green triangles - LEDs Blue squares - Jumpers Test points analysis The following images are display a test point analysis performed using an oscilloscope on a smooth operating down-mast. Diagnostics SRT LN radar sensor X-band down-mast Service Manual 19

20 TP12 - Prestc TP14 - Trout TP19 VDIN TP20 VDOUT TP21 - Rx TP22 - Tx TP23 - Z OUT TP24 - Hl OUT TP25 - TRPUSH TP26 - TRPULL I/O Requirements Signal Type Description Polarity Positive VDOUT mplitude 1 to 4 Vpp adjustable Load Terminated 75 Ω (always present on PCB) Bandwidth MHz (-3 db) DC level 0 V 20 Diagnostics SRT LN radar sensor X-band down-mast Service Manual

21 Signal Type Description TROUT Programmable pre trigger output: PTROUT Polarity mplitude Load Prf Pulse width Polarity mplitude Positive TTL to 8 V Terminated 75 Ω (always present on PCB) Hz 1.28 μs (min.) Positive 50 Ω 75 Ω 0 (high impedance) Load 50 Ω to Pulse width ns Pulse advance 0 40 μs Serial interface: SEROUT / TX ± SERIN Signal standard RS232 terminated 3 KΩ RS422 terminated 120 Ω (selectable) Baud rate 4800 Position data: CP mplitude 4 to 11 V high level 128/1024/4096 pulses per antenna revolution CPIN Load Load: 2 kω Pulse width > 80 μs ntenna reference: mplitude 4 to 11 V high level One pulse for revolution RP RPIN Load 2 KΩ Pulse width > 80 μs ntenna start NTS Load Open collector output 100m antenna rotating when NTS is shorted to ground Position data mplitude RS 422 balanced output U1 / NU1 ntenna reference: mplitude RS 422 balanced output U0 / NUO Power on: PWON ntenna speed control: SPD mplitude mplitude From 3 V to 30 V to power up transceiver electronics From 2 V to 5 V IEC61162 Transmission protocol Field type Symbol Description Status = Yes, data valid, warning flag clear. V = No, data invalid, warning flag set. Variable numbers x.x Variable length integer or floating numeric field. Optional leading and trailing zeros. The decimal point and associated decimal fraction are optional if full resolution is not required (example: = 73.1 = = 73). Fixed HEX field hh- Fixed length HEX number only, MSB on the left. Diagnostics SRT LN radar sensor X-band down-mast Service Manual 21

22 Field type Symbol Description Variable text c c Variable length valid character field. Fixed alpha field aa- Fixed length field of upper-case or lower-case alpha characters. Fixed number field xx- Fixed length field of numeric characters. Fixed text field cc- Fixed length of valid characters. ¼¼ Note: Spaces shall only be used in variable text fields. ¼¼ Note: negative SIGN - (HEX 2D) is the first character in a field if the value is negative. When used, this increases the specified size of fixed length fields by one. The sign is omitted if the value is positive. Data transmission error messages Message Error code Description COP 00 CRC error CO2 01 Field not in compliance with specification 02 Missing transceiver control SE2 00 CRC error 01 Field not in compliance with specification 02 Wrong sector value TIM 00 CRC error 01 Field not in compliance with specification 02 Missing command type 03 Initialization value outside limits DPC 00 CRC error 01 Field not in compliance with specification 02 Wrong potentiometer ID 03 Potentiometer value outside limits CFG 00 CRC error 01 Field not in compliance with specification SPD 00 CRC error 01 Field not in compliance with specification REQ 00 CRC error 01 Field not in compliance with specification DLY 00 CRC error 01 Trigger field not in compliance with specification 02 Pre-trigger field not in compliance with specification 22 Diagnostics SRT LN radar sensor X-band down-mast Service Manual

23 4 Troubleshooting Symptom table Symptom Potential cause TXRX does not turn on Step 1, 3, 7 Transmitter can t be controlled Step 7 Transmitter performance is low Step 4, 7 Transmitter does not generate RF Step 2, 5, 6, 7 Potential cause and corrective action table Step Potential cause Check Corrective action 1 Power supply is damaged Check 50 V on TB2 on SRT PWR-DC PCB and if missing, check line (220 V) 2 SRT PWR-DC PCB is damaged Check the 700 V on TB3 and the 15V on TB1 3 Video signal interrupted Check video signal quality 4 Magnetron is in End of Life Check Fails and the Magnetron work time 5 SRT MOS PCB is damaged Check TR Pull and TR Push on SRT Control PCB 6 SRT Control PCB is damaged Check TR Pull and TR Push on SRT Control PCB If 220 V C is missing check the ship s power supply and circuit breakers If a voltage is missing replace the SRT PWR-DC PCB Repair damaged video cable Replace the Magnetron If the two signals are present replace the SRT MOS PCB If the two signals are present replace SRT Control PCB 7 Call assistance Contact the manufacturer s service department ntenna missing data Step Check Yes No Corrective action 1 Check HL IN and Z IN signal on the SRT Control PCB Check HL IN and Z IN signals on the SRT Down adapter 2 Check HL IN and Z IN signal on the SRT Control PCB Problem external to the TXRX 3 Check HL IN and Z IN signal on the SRT Down adapter Troubleshooting SRT LN radar sensor X-band down-mast Service Manual 23

24 Step Check Yes No Corrective action 4 Check HL IN and Z IN signal on the SRT Control PCB Replace the cable that connects the SRT Down adapter to the SRT Control PCB (or) 5 Check HL IN and Z IN signal on SRT Down adapter 6 Check HL IN and Z IN signal on the SRT Control PCB 7 Check HL OUT and Z OUT signals on the SRT Control PCB 8 Check HL IN and Z IN signals on the SRT Control PCB 9 Check HL OUT and Z OUT signals on SRT Control PCB Replace the SRT Down adapter (or) Contact the manufacturer s service department Replace the SRT Control PCB Problem external of TXRX or interconnection problem ¼¼ Note: Follow the order of steps for proper control of the system. Main possible failures Failure message Corrective action Other Magnetron heat fail Replace the SRT MOS PCB If the problem still exists replace the SRT PWR-DC PCB 24 VCO fail Replace the SRT PWR DC PCB +15 fail Replace the SRT PWR DC PCB RX fail Replace the SRT Control PCB CRC fail Replace the SRT Control PCB Interlock open Check if the door is correctly closed. If it is, replace the internal safety switch Safety switch open Close the safety switch +48 Fail Replace the power supply Front end fail Replace the RF detector LNFE assy Magnetron EOL Replace the Magnetron Modulation fail and low PWR line level Replace the Magnetron If the problem still exists replace the SRT MOS PCB Bad picture on the screen (performance is degraded) Big ball on the center of the screen and weak signal from far ranges echoes Low PWR level No ring on the screen using performance monitor test Proceed to automatic tuning. If the tuning bar is too low replace the RF detector LNFE assy If the poor quality image is still on the screen replace the X-band and TR Limiter The waveguide is damaged. Proceed to a full inspection of the waveguide. Dry it if it is necessary and if it seems corroded then replace the duplexer and/or the X-band TR Limiter and/or the Magnetron and/or the RF detector LNFE assy Replace the diode assembly Replace the diode assembly 24 Troubleshooting SRT LN radar sensor X-band down-mast Service Manual

25 Failure message Corrective action Other TX/RX overheating Radar fail + no radar (in the center of PPI) No spoke data + no spoke (in the center of PPI) Check the environment of the TX/ RX room Check the SRT LN PCB and replace it if broken Check the external LN cable Check the internal LN connection Check the Bearing reader PCB and replace it if broken Check the SRT Control PCB and replace it if broken Check the connection cable from the SRT Control PCB to the Bearing reader Troubleshooting SRT LN radar sensor X-band down-mast Service Manual 25

26 5 Fault repair ¼¼ Note: Maintenance must only be carried out after the equipment has been switched off. Before commencing with repair work, ensure the spare part is available, and its condition has been verified as good.! Warning: The replacement operations must be carried out exclusively by skilled personnel with appropriate equipment training. Magnetron replacement This operation should be performed as required or after 7000 hours of operation. 1 On the electric switchboard, set to OFF the main line breaker relevant to the unit and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the cover 4 Remove the cover 5 Remove the four nuts securing the protective transparent cover on the SRT MOS PCB 6 Remove the protective transparent cover () 7 Remove the two nuts securing the magnetron cables, taking note of their position 8 Remove the four screws securing the magnetron 9 Remove the magnetron (B) B 10 Before fitting the new magnetron spread a layer of silicone compound on the contact surface to improve the magnetron s heat dissipation 11 In order to install the new magnetron, perform the removal steps in reverse order 12 On the electric switchboard, set to ON the main line breaker relevant to the unit and remove the 13 On the R5000 PSU, switch the power switch to the ON position and remove the card reading 14 Position the rotary switch S1 on the SRT Control PCB on position 2 15 On the SRT PWR DC PCB, make a link P1 ¼¼ Note: Before switching on, wait for 30 minutes. 16 Following the procedures of the display manual, perform the VCO calibration 17 Perform the following operations -- on the SRT PWR DC remove the link P1 -- on the SRT Control PCB, position S1 on 0 (zero) 18 Unlock and close the equipment cover by following the reverse procedure 26 Fault repair SRT LN radar sensor X-band down-mast Service Manual

27 RF detector and LNFE replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the cover 4 Remove the cover 5 Remove the RF detector and LNFE cabling connectors, taking note of their position 6 Remove the six screws () securing the RF detector and LNFE (B) 7 Remove the RF detector and LNFE B 8 In order to install the new RF detector and LNFE, perform the removal steps in reverse order 9 Following the procedures of the display manual, perform the VCO calibration 10 On the electric switchboard, set the radar main breaker to ON and remove the card reading 11 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Limiter replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the cover 4 Remove the cover 5 Remove the RF Detector & LNFE. See RF detector and LNFE replacement on page 27 6 Remove the four screws securing the limiter () Fault repair SRT LN radar sensor X-band down-mast Service Manual 27

28 7 Remove the limiter 8 To install the new limiter, perform the removal steps in reverse order 9 On the electric switchboard, set the radar main breaker to ON and remove the card reading 10 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Noise diode replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the cover 4 Remove the cover 5 Remove the RF Detector & LNFE. See RF detector and LNFE replacement on page 27 6 Remove the limiter. See Limiter replacement on page 27 7 Remove the cabling connector from the noise diode, taking note of their position 8 Remove the cabling connector from the Performance monitor diode, taking note of their position 9 Remove the four screws securing the waveguide bend () 10 Move the waveguide bend to the right to gain access to the transparent square cover behind the waveguide bend 11 Remove the transparent cover 12 Remove the three screws (D) securing the Performance monitor diode (B) 13 Remove the magnetron cables from the SRT MOS PCB. See Magnetron replacement on page Remove the screw securing the grounding cable from the magnetron 15 Remove the two screws securing the circulator B bracket ¼¼ Note: Hold the RF components assembly to avoid any damage. 16 Remove the three screws securing the magnetron plate 17 Remove the RF components assembly 18 Remove the four screws securing the noise diode 19 Remove the noise diode (C) C B D 20 In order to install the new noise diode, perform the removal steps in reverse order 21 On the electric switchboard, set the radar main breaker to ON and remove the card reading 28 Fault repair SRT LN radar sensor X-band down-mast Service Manual

29 22 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Circulator replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the cover 4 Remove the cover 5 Remove the RF detector and LNFE. See RF detector and LNFE replacement on page 27 6 Remove the limiter. See Limiter replacement on page 27 7 Remove the noise diode. See Noise diode replacement on page 28 8 Remove the four screws with securing the Performance monitor diode to the circulator 9 Remove the Performance monitor diode 10 Remove the four screws securing circulator to the filter 11 Remove circulator () 12 In order to install the new circulator, perform the removal steps in reverse order 13 On the electric switchboard, set the radar main breaker to ON and remove the card reading 14 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Electronics assy disassembly 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the covers 4 Remove the cover 5 Remove the magnetron cables from their cable clamps ¼¼ Note: Hold the Electronics assy to avoid any damage during screws removal. 6 Remove the six screws securing the Electronics assy 7 Slide out the Electronics assy until the three internal holes of the Electronics assy coincide with the three external holes of the mechanical chassis 8 Secure the Electronics assy using the three screws previously removed 9 In order to install the new electronics assembly, perform the removal steps in reverse order Circulator B replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the cover Fault repair SRT LN radar sensor X-band down-mast Service Manual 29

30 4 Remove the cover 5 Remove the RF detector and LNFE cabling connectors, taking note of their position 6 Remove the noise diode cabling connector, taking note of their position 7 Remove the Performance monitor diode cabling connector, taking note of their position 8 Remove the magnetron. See Magnetron replacement on page 26 9 Remove the two screws () securing the RF detector and LNFE to its bracket 10 Remove the four screws (B) securing the waveguide bend (C) C B 11 Move the waveguide bend to the right to gain access to the transparent square cover behind the waveguide bend 12 Remove the transparent square cover (D) 13 Remove the three screws (E) securing the Performance monitor diode 14 Remove the two screws (F) securing the circulator B bracket (G) ¼¼ Note: Hold the RF components assembly to avoid any damage. D E J H F G K I 15 Remove the three screws securing the magnetron plate 16 Remove the RF components assembly 17 Remove the two screws (H) securing the magnetron plate to the circulator B (I) 18 Remove the magnetron plate 19 Remove the two screws securing the circulator B bracket (J) 30 Fault repair SRT LN radar sensor X-band down-mast Service Manual

31 20 Remove the circulator B bracket 21 Remove the two screws securing the circulator B from the filter (K) 22 Remove the circulator B L 23 Remove the four screws securing the low power termination to the circulator B (L) 24 In order to install the new circulator B perform the removal steps in reverse order 25 On the electric switchboard, set the radar main breaker to ON and remove the card reading 26 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Performance monitor diode replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the cover 4 Remove the cover 5 Remove the RF detector and LNFE cabling connectors, taking note of their position 6 Remove the noise diode cabling connector, taking note of their position 7 Remove the Performance monitor diode cabling connector, taking note of their position 8 Remove the magnetron cables from the SRT MOS PCB. See Magnetron replacement on page 26 9 Remove the screw () securing the grounding cable (B) to the magnetron B 10 Remove the two screws securing the RF detector and LNFE to its bracket 11 Remove the four screws securing the waveguide bend 12 Move the waveguide bend to the right to gain access to the transparent square cover behind the waveguide bend 13 Remove the transparent square cover 14 Remove the three screws securing the Performance monitor diode 15 Remove the two screws securing the circulator B bracket ¼¼ Note: Hold the RF components assembly to avoid any damage. 16 Remove the three screws securing the magnetron plate Fault repair SRT LN radar sensor X-band down-mast Service Manual 31

32 17 Remove the RF components assembly 18 Remove the four screws (C) securing the Performance monitor diode to the Circulator 19 Remove the Performance monitor diode 20 In order to install the new Performance monitor diode, perform the removal steps in reverse order ¼¼ Note: Do not close the cover. 21 On the electric switchboard, set the radar main breaker to ON and remove the card reading 22 On the R5000 PSU, switch the power switch to the ON position and remove the card reading 23 Pull the safety switch screw (D) until it locks C D 24 Set the radar range scale to 24 NM. Refer to the R5000 Radar System Operator Manual 25 On the display radar, check that outer ring of the performance monitor ring coincides with the bearing scale 26 Push the safety switch screw 27 Close the cover by performing the steps in reverse order SRT Mini-PSU PCB replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the eight screws securing the cover 4 Remove the cover 5 Remove the cabling connectors, taking note of their position 6 Remove the six screws securing the SRT Mini-PSU PCB () 7 Remove the SRT Mini-PSU PCB 8 In order to install the new SRT Mini-PSU PCB, perform the removal steps in reverse order 9 On the electric switchboard, set the radar main breaker to ON and remove the card reading 10 On the R5000 PSU, switch the power switch to the ON position and remove the card reading 32 Fault repair SRT LN radar sensor X-band down-mast Service Manual

33 SRT LN CPU PCB replacement 1 Follow steps 1 to 6 for SRT Mini-PSU PCB replacement. See SRT Mini-PSU PCB replacement on page 32 2 Remove the ethernet cable connector ¼¼ Note: To press the locking clip of the ethernet cable connector, insert a screwdriver through the hole under the SRT LN CPU PCB. 3 Remove the six spacers securing the SRT LN CPU PCB () 4 Remove the SRT LN CPU PCB 5 In order to install the new SRT LN CPU PCB, perform the removal steps in reverse order 6 On the electric switchboard, set the radar main breaker to ON and remove the card reading 7 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Performance monitor arm replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position 4 Remove the four screws () securing the performance monitor arm (B) 5 Remove the performance monitor arm B 6 In order to install the new performance monitor arm, perform the removal steps in reverse order 7 Switch the safety switch to the ON position 8 On the electric switchboard, set the radar main breaker to ON and remove the card reading 9 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Fault repair SRT LN radar sensor X-band down-mast Service Manual 33

34 Bearing reader PCB replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position 4 Rotate the antenna by hand, as needed, so that it is positioned facing the bow of the vessel 5 Unscrew the four screws securing the cover 6 Open the cover fully 7 Remove the cabling connector, taking note of their position 8 Remove the two screws () securing the bearing reader PCB 9 Remove the bearing reader PCB 10 In order to install the new bearing reader PCB, perform the removal steps in reverse order 11 Switch the safety switch to the ON position 12 On the electric switchboard, set the radar main breaker to ON and remove the card reading 13 On the R5000 PSU, switch the power switch to the ON position and remove the card reading SRT D PCB replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position 4 Rotate the antenna by hand, as needed, so that it is positioned facing the bow of the vessel 5 Unscrew the four screws securing the cover 6 Open the cover fully 7 Remove the cabling connectors, taking note note of their position 8 Remove the four screws () securing the SRT D PCB (B) 9 Remove the SRT D PCB B 10 In order to install the new SRT D PCB, perform the removal steps in reverse order 11 Switch the safety switch to the ON position 34 Fault repair SRT LN radar sensor X-band down-mast Service Manual

35 12 On the electric switchboard, set the radar main breaker to ON and remove the card reading 13 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Brushless controller replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position 4 Rotate the antenna by hand, as needed, so that it is positioned facing the bow of the vessel 5 Unscrew the four screws securing the cover 6 Remove the cabling connectors, taking note of their position 7 Remove the cabling from the cable clamps () 8 Remove the four screws (B) securing the brushless controller and the cable clamp 9 Remove the brushless controller and the cable clamp 10 Remove the brushless controller 11 Remove the screw (C) and the cable clamp on the PCB C B 12 On the new brushless controller, replace the screw (C) with the screw and the cable clamp removed from the old brushless controller ¼¼ Note: Do not remove the spacer behind the PCB. 13 In order to install the new brushless controller, perform the removal steps in reverse order 14 Switch the safety switch to the ON position 15 On the electric switchboard, set the radar main breaker to ON and remove the card reading 16 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Motor unit replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position 4 Rotate the antenna by hand, as needed, so that it is positioned facing the bow of the vessel 5 Unscrew the four screws securing the cover 6 Open the cover fully 7 Remove the cabling connectors from the Brushless controller, taking note of their position 8 Remove the TB8 cabling connector () from the SRT D PCB, taking note of their position 9 Remove the motor cabling from the cable clamps Fault repair SRT LN radar sensor X-band down-mast Service Manual 35

36 10 Remove the screw (B) securing the grounding cable to the brushless controller B 11 Remove the four screws (C) securing the motor unit 12 Remove the motor unit 13 Rotate the driving gear until the screw securing the motor shaft is visible in the gearbox flange hole 14 Partially unscrew the screw securing the motor shaft ¼¼ Note: Do not remove the screw. 15 Remove the four screws (D) securing the motor 16 Remove the motor D D C 17 In order to install the new motor, perform the removal steps in reverse order 18 Switch the safety switch to the ON position 19 On the electric switchboard, set the radar main breaker to ON and remove the card reading 20 On the R5000 PSU, switch the power switch to the ON position and remove the card reading Gearbox reducer replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position 4 Rotate the antenna by hand, as needed, so that it is positioned facing the bow of the vessel 5 Unscrew the four screws securing the cover 6 Open the cover fully 7 Remove the motor. See Motor unit replacement on page 35 8 Remove the gearbox reducer 9 In order to install the new gearbox reducer, perform the removal steps in reverse order 10 Switch the safety switch to the ON position 36 Fault repair SRT LN radar sensor X-band down-mast Service Manual

37 11 On the electric switchboard, set the radar main breaker to ON and remove the card reading 12 On the R5000 PSU, switch the power switch to the ON position and remove the card reading ntenna pedestal replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Switch the safety switch to the OFF position ¼¼ Note: Secure the antenna to avoid any damage during the removal of the screws. 4 Remove the four screws securing the antenna 5 Remove the antenna 6 Remove the nut securing the grounding cable to the grounding terminal 7 Remove the grounding cable 8 Remove the four screws securing the waveguide kit 9 Unscrew the four screws securing the cover 10 Open the cover fully 11 Remove the wires connected to the TB1 terminal board (), taking note of their position 12 Unscrew the cable gland nut (B) B 13 Move the down-mast cable until the wires are out of the pedestal 14 Remove the four nuts securing the pedestal 15 Remove the pedestal 16 In order to install the new pedestal, perform the removal steps in reverse order 17 Switch the safety switch to the ON position 18 On the electric switchboard, set the radar main breaker to ON and remove the card reading 19 On the R5000 PSU, switch the power switch to the ON position and remove the card reading SRT LN down-mast transceiver replacement 1 On the electric switchboard, switch OFF the radar main breaker and place a card reading 2 On the R5000 PSU, switch the power switch to the OFF position and place a card reading 3 Remove the four screws () securing the waveguide kit 4 Remove the down mast cable, the power cable and the ethernet cable 5 Remove the nut securing the grounding cable to the grounding terminal 6 Remove the grounding cable ¼¼ Note: Secure the SRT LN down-mast transceiver to avoid any damage during the removal of the fasteners. 7 Remove the fasteners securing the SRT LN down-mast transceiver Fault repair SRT LN radar sensor X-band down-mast Service Manual 37

38 8 Remove the SRT LN down-mast transceiver 9 In order to install the new SRT LN down-mast transceiver, perform the removal steps in reverse order 10 On the electric switchboard, set the radar main breaker to ON and remove the card reading 11 On the R5000 PSU, switch the power switch to the ON position and remove the card reading 38 Fault repair SRT LN radar sensor X-band down-mast Service Manual

39 6 Spare parts The most up-to-date spare parts list is available at: Part number Description Compatible SRT LN, ntenna pedestal ntenna pedestal (6&9XFT), replacement unit SRT LN, ntenna pedestal HSC (6&9XFT), replacement unit ntenna pedestal SRT LN, ntenna pedestal (12XFT), replacement unit SRT LN, 25D X-band, replacement unit ntenna pedestal SRT LN, 25D X-band Performance monitor arm ntenna pedestal replacement Bearing reader PCB ntenna pedestal X-band gearbox reducer ntenna pedestal SRT LN, motor for antenna ntenna pedestal pedestal Brushless controller assy ntenna pedestal SP D PCB X-band and S-band antenna pedestal SP SRT gearbox reducer for 12 ft 12/25 kw transceiver antenna SRT PWR-DC PCB 12/25/30 kw transceiver SRT MOS PCB 25/30 kw transceiver SRT Control PCB 12/25/30 kw transceiver SRT Down adapter 25/30 kw transceiver SP RF detector & LNFE 12/25 kw transceiver Circulator 12/25 kw transceiver Limiter 12/25 kw transceiver SP Magnetron 25 kw transceiver Noise diode 12/25 kw transceiver SP Performance monitor diode 25 kw transceiver Mini PSU PCB 12/25/30 kw transceiver SRT LN CPU PCB 12/25/30 kw transceiver Spare parts SRT LN radar sensor X-band down-mast Service Manual 39