SMARTFIND GMDSS NAVTEX Service Manual
Commercial in confidence Table of Contents 1. Introduction ........................................................................................................ 4 1.1. Scope ............................................................................................................ 5 1.2. Applicability ................................................................................................... 5 1.3. Product History.................................................................................
Commercial in confidence 1. INTRODUCTION NAVTEX is a method of transmitting navigational warnings and weather forecasts from designated coast radio stations. All English language transmissions are made on 518 kHz. Each station is allocated several time ‘slots’ during the day, when it is permitted to transmit; these are normally at four hourly intervals. The only exceptions to this are gale warnings and search and rescue messages, which may be transmitted at any time.
Commercial in confidence 1.1. Scope This manual provides the instructions to enable routine and emergency servicing of the NAVTEX equipment listed below. This manual represents the original equipment manufacturer’s (OEM) service documentation applicable to these products. 1.2. Applicability This manual applies to the following NAVTEX equipment: i McMurdo SMARTFIND NAVTEX Part number 93-001-001A 1.3. Product History 10/07/2010 – Entered production.
Commercial in confidence 1.5. Safety notices Please read the following information for your safety: This product has been assessed as presenting negligible hazard in a sealed serviceable state. Safety analysis The following table summarises the nature of the hazard which may be present when the unit is opened or serviced; each hazard is discussed at greater length in the detailed sections.
Commercial in confidence 2. ASSESSMENT 2.1. Maintenance tasks Service providers are reminded that it is their responsibility to ensure that the procedures herein are followed, that only McMurdo Ltd approved parts are fitted, and that good practice is observed. The functions which can be performed by service providers are: i i i i i Routine testing Software updating System set up Fault diagnosis Repair 2.2. Routine testing The SMARTFIND NAVTEX has automatic Built In Test Equipment (BITE).
Commercial in confidence SMARTFIND NAVTEX ASSESSMENT Ref Date Customer Address Type Serial No Antenna type: Vessel name: Customer comments Warranty claim Return to Customer? YES/NO INSPECTION/DIAGNOSIS Items Returned x x x x Main unit Antenna/bracket Power cable Manual Item Condition Software version:________________________ DIAGNOSIS FUNCTIONAL TEST ATE (in factory only) Functional Test Burn-in Comments New Parts Fitted RF PCB Keypad LCD Display PCB Gasket Backbox Conclusions x x
Commercial in confidence 3. MAINTENANCE PROCEDURES 3.1. Inspection The SMARTFIND NAVTEX should be inspected prior to any servicing/repair work. The following should be inspected: i Case – ensure no cracks in the plastic or other damage i Screen – inspect display for damage and condition i Rear connectors – ensure pins are straight and connectors are in good condition i Key pad - check operation SMARTFIND GMDSS NAVTEX Operation When powered, the SMARTFIND GMDSS NAVTEX will begin boot up.
Commercial in confidence 1. 4 Soft keys. Used to select various menus and options. The function of each is displayed on the screen next to the key. 2. Display key. Press and release to control the back light. Press and hold to control the contrast and brightness of the display. Also used to switch between day and night mode. 3. Cursor key (Up/Down) used to navigate the display and to control brightness when the display key pressed. 4.
Commercial in confidence SMARTFIND NAVTEX service manual Page 11
Commercial in confidence 3.3. Disassembly Warning: the backlight for the display is powered by 250V AC. Observe Anti-static precautions, a clean room environment is recommended when opening the case especially when replacing the LCD screen. Isolate the equipment by disconnecting all outside connectors. Back Box removal 1. Remove the 6 off self tapping screws 2. Lift off the back box and disconnect the ribbon cable. 3. Care should be taken not to damage the seal.
Commercial in confidence RF PCB Removal 1. Remove the 4 off connector clamps (see above) using 5mm socket or nut runner. Connector clamps 2. Remove the 3 off screws from the PCB. Note that one screw may be secured into a pillar and so will be of a different type.
Commercial in confidence Display PCB removal 1. Unplug the white backlight power supply cable leading to the display. Warning: Handle with care, there is 250V AC on this cable when equipment is powered up and it may still carry a small residual charge. 2. Remove the silver tape link. It is recommended that this is not reused.
Commercial in confidence 3. Release the lock and disconnect the ribbon connector. Slide clamp as indicated below 4. Remove the 11 OFF self tapping screws.
Commercial in confidence Removal of LCD Screen NOTE: This should only be done in clean room conditions – any dust present may be attracted to the screen and will show up when next powered up. 1. Follow previous instructions to remove back box and display PCB. 2. Remove the keypad – this lifts out. Pull carefully from top and bottom – take care not to tear the keypad. 3. Remove the 4 off screws and washers retaining the display. 4. The display can now be lifted out.
Commercial in confidence 3.4. Reassembly Reassemble fascia/display 1. If fitting new fascia/window remove protective film from inside of screen before fitting LCD. 2. Fit ribbon cable to display. Ensure that the insulated side is away from the PCB. 3. Remove film from LCD and place LCD on to fascia. 4. Secure 4 off screws and washers to 50cNm. 5. Fit the keypad and press home securely. Ensure that the top of the pillars are level with the top of the keypad.
Commercial in confidence Refit Display PCB 1. Replace Display PCB on to fascia and reconnect the ribbon connector – ensure the locking mechanism is secure. 2. Reconnect the backlight. 3. 4. 5. 6. Fit the 2 off screws indicated above and tighten all to 50cNm. Fit the remaining 9 off screws to 50cNm. Check that all the keyboard keys operate correctly. Fit link – this provides an earth link and problems with the backlight will occur if not fitted.
Commercial in confidence Back Box Ensure that pillar (if fitted) is tight before reassembly. 1. Fit RF PCB into back box and secure 3 off screws to 30cNm. 2. Fit 4 off Connector clamps with screwlock (Loctite) and secure to 30cNm. 3. Refit back box gasket. 4. Reconnect the ribbon cable. 5. Place back box in position, ensure gasket is in position and secure with 6 off screws to 30cNm.
Commercial in confidence 3.5. Leak Testing The SMARTFIND NAVTEX is not a sealed unit. Therefore there is no requirement to leak test the product. However if the unit is flush mounted then the front fascia is approved to IEC60945-4 for protected equipment. 3.6. Factory Reset In set up mode there is an option for FACTORY RESET. This should be used with caution. This will return all user configurable settings to the factory default – including resetting the two serial port parameters to default settings.
Commercial in confidence 490kHz: 138 4209.5kHz 125 RSSI: 017 These are typical figures and may vary plus or minus but should always be around these values. Note: 140 is the default figure for the three VCO’s. If all three receives show 140 as their set value the correct settings may have been lost or overwritten. Contact McMurdo Ltd customer service for further advice. Note: If the RSSI shows a value of 000, the RSSI will need to be reset and calibrated.
Commercial in confidence 4. ON-SHIP ASSESSMENT Also refer to APPENDIX 3: SEA TRIAL CHECK LIST General information regarding optimising NAVTEX Reception When sailing within a published NAVTEX service area, reception coverage can extend as far as 200 - 300 nautical miles. If the NAVTEX signal has to cross land to any significant extent, attenuation may occur and this can reduce the reception range to as little as 50 miles.
Commercial in confidence When reception quality is good, the error rate will be low (<4%). The error rate is calculated as an average over a large number of received characters. Wait until the next scheduled transmission time of a distant NAVTEX station (100 miles or more away). Use the monitor facility (receiver options page) to view received messages as they are received in real time. 1. Turn off all sources of AC power usage, battery chargers, inverters, generators and shore power.
Commercial in confidence 5. FAULT FINDING 5.1. On-ship fault finding No NAVTEX reception Active antenna fitted; Is 12V dc present on the antenna TNC connector socket? NO - check that it is enabled in Setup mode – Receiver options, “Antenna power enabled”. Active or Passive or wire antenna fitted; Verify antenna integrity, check cable and connecters for damage.
Commercial in confidence 5.2. Fault finding in workshop Strange banding / stripes / artifacts on the LCD 1. Check the flat flexi cable between the LCD and the display PCB - replace if necessary 2. Replace the LCD module. 3. If still faulty replace the display PCB Does not start up 1. Ensure that backlight has not failed giving the impression that the unit is not starting (use a torch or bright light to view screen). 2. Open case and check for trapped backlight wires. 3.
Commercial in confidence Testing serial data ports COM1 (15 D), COM2 (9 D) Use this procedure to verify the correct operation of each communications data port hardware. Make a loop back test. (15 D) COM 1, (normally assigned to GPS or ECDIS) The connections to the D-Sub 15-pin socket on are given below. (link TXA to RXA & TXB to RXB) To quick way to do this is to temporary connect together the following cable cores contained within the power cable provided as standard.
Commercial in confidence 5.3. System Block Diagram Provided for information only. Receiver 1 Receiver 2 Signal processo r& CPU Message memory Receiver 3 IBS port IEC61162 INTEGRAL DISPLAY Printer port RS232 Outline circuit description The unit runs off a 10.8 to 31.2V DC power input protected by auto resetting fuse. A dc-dc converter provides a number of internal voltage rails used by the LCD, processor and receivers. The processor provides for control of the other sections of the circuitry.
Commercial in confidence 5.4. Service Bulletins ISSUE No. 65 06th April 2011 Subject: Reference: Release of software version 1.2.25 93-721Z Issue 2 Changes made since Issue 1 1. Antenna fault detection featured added, open-circuit and short-circuit will now indicate a system error. A new ‘Antenna Alarm’ setup menu option can be used to enable or disable this feature if the active antenna type is not compatible due to less than 4 ma current consumption. 2. Message list summary page improvements.
Commercial in confidence 5.5. Software Release Notes 06/04/2011 - 93-721Z issue 2, routine software update released as V12.25. 6. REPAIR PROCEDURES Repair policy for this product is repair by replacement of major sub-assemblies. Component level diagnosis and repair is not supported. Each PCBs can be inspected for dry joints etc but component replacement is not possible. The principal repair activity is the replacement of the circuit boards/display. Full instructions for this can be found in section 3.
Commercial in confidence 7. SPARES The following items are available as spare parts/accessories: Part number Description 93-050A 93-051A 93-052A 93-053A 93-054A Display keypad Front fascia assembly 2m Interface cable (DC power) Earth cable LCD Screen 93-055A Display Back Box 93-056A 93-057A 93-060A Flat flexi cable Display and RF PCB USB/RS232 to RS422 converter Deskmount bracket kit 93-061A Bulkhead bracket kit 93-204 User manual 93-058A Contents Fascia, window seal and clear screen.
Commercial in confidence APPENDIX 1: SPECIFICATION Please note that the product specification is issued in the user manual for each product. The user manual is delivered with each new product and is also available on our website. McMurdo reserves the right to change specifications without notice.
Commercial in confidence APPENDIX 2: MESSAGE STRUCTURES SMARTFIND NAVTEX service manual Page 32
Commercial in confidence SMARTFIND NAVTEX service manual Page 33
Commercial in confidence SMARTFIND NAVTEX service manual Page 34
Commercial in confidence SMARTFIND NAVTEX service manual Page 35
Commercial in confidence APPENDIX 3: SEA TRIAL CHECK LIST SMARTFIND GMDSS NAVTEX Sea Trial Check List SMARTFIND NAVTEX Installation verification report for Vessel (name); Completed by; Position; Date; Location (or port); VESSEL IDENTIFICATION INFORMATION Name Call Sign MMSI NAVTEX S/N Antenna Type RX frequencies 518 kHz supported by 490 kHz antenna 4209.
Commercial in confidence Introduction and Scope This Sea Trial Checklist is designed to prove that the GMDSS NAVTEX receiver is working to specification in the installation to be evaluated. SMARTFIND GMDSS NAVTEX is a shipborne radio receiver designed to receive NAVTEX information, which consists of messages concerning weather and shipping conditions. The messages are transmitted by land-based transmitters on one of three frequencies: 490kHz, 518kHz or 4.2095MHz.
Commercial in confidence Basic System Set-up Test instruction Check that displayed UTC date is correct Desired effect Yes Check that displayed UTC time is correct Yes Check Lat Long is correct (GNSS must be connected) Check that the antenna type is reported correctly For active antenna set as ‘Enabled’ Check screen saver status Yes After workshop service List the 3 VCO DAC settings PASS/FAIL Enabled = DC voltage applied to antenna connector centre pin (Enabled) (de-selected) Ref Osc; 490; 518; 4209
Commercial in confidence System Operation Test instruction – view received messages Note down the station designators for all stations received on 490kHz Desired effect Read message text Note down the station designators for all stations received on 518kHz Read message text Note down the station designators for all stations received on 4209.
Commercial in confidence Live System Operation 1 Test instruction – Live reception (red LED will normally flash). If there is a live transmission during the site visit then go to the SETUP MODE, Receiver options page, (NAVTEX) monitor source, select the correct receive channel – (518, 490, 4209.
Commercial in confidence Live System Operation 2 Test instruction – Serial interface ports If GNSS (GPS) or IBS is connected. Go to the SETUP MODE, Serial options page, Serial monitor source, select the correct serial, port Desired effect View data IBS port (on 15 way D connector COM1 ) Note connected device type Printer – NMEA port (on 9 way D connector COM 2) Note connected device type Verify Baud rate is set correctly for each device connected.
Commercial in confidence Notes; SMARTFIND NAVTEX service manual Page 42
Commercial in confidence SMARTFIND NAVTEX service manual Page 43
McMurdo Limited Silver Point Airport Service Road Portsmouth PO3 5PB United Kingdom Phone: Fax: Email: Website: +44 (0)23 9262 3900 +44 (0)23 9262 3998 customerservice@mcmurdo.co.uk www.mcmurdo.co.
