Simrad SRT Manuale utente
ENGLISH
SRT LAN radar sensor
S-band down-mast
Service Manual
www.navico-commercial.com
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Preface | SRT LAN radar sensor S-band down-mast Service Manual
Preface
Disclaimer
As 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.
NAVICO HOLDING AS AND ITS SUBSIDIARIES, BRANCHES AND AFFILIATES DISCLAIM ALL
LIABILITY FOR ANY USE OF THIS PRODUCT IN A WAY THAT MAY CAUSE ACCIDENTS, DAMAGE
OR THAT MAY VIOLATE THE LAW.
This manual represents the product as at the time of printing. Navico Holding AS 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 © 2021 Navico Holding AS.
Trademarks
®Reg. U.S. Pat. & Tm. Off, and ™ common law marks. Visit www.navico.com/intellectual-
property to review the global trademark rights and accreditations for Navico Holding AS and
other entities.
Navico® is a registered trademark of Navico Holding AS.
Simrad® is used by license from Kongsberg.
NMEA® and NMEA 2000® are registered trademarks of the National Marine Electronics
Association.
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:
www.navico-commercial.com
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 Commission
Implementing Regulation (EU) 2020/1170 (16 July 2020) - Wheelmark
The relevant declaration of conformity is available in the product’s section at the following
website: www.navico-commercial.com
4 | Preface | SRT LAN radar sensor S-band down-mast Service Manual
About 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
Important text conventions
Important text that requires special attention from the reader is emphasized as follows:
¼Note: 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
988-12286-001 2018-11-06
First version.
988-12286-002 2021-06-25
Updates to compliance and extended tune.
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. Always 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 or RF coax cable from a radar
transmitter for maintenance purpose, the transmitter output should be terminated with a
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Preface | SRT LAN radar sensor S-band down-mast Service Manual
matched load. If this is not possible, care should be taken. Do not stand in front of an open-
ended waveguide or RF coax cable from which power is being radiated.
¼Note: 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 or a RF coax cable from which power
is being radiated.
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. Although 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.
Conguration Distance 100 W/m2
point (m)
Distance 50 W/m2
point (m)
Distance 10 W/m2
point (m)
30 KW Transceiver
12’S-band Antenna
-
(inside the antenna)
-
(inside the antenna) 0.4
X-Ray radiation
This radar system does not generate X-ray radiation.
6 | Contents | SRT LAN radar sensor S-band down-mast Service Manual
Contents
8 Component overview
8 Antenna and pedestal
8 SRT LAN down-mast transceiver
9 Component location
10 SRT down adapter PCB
10 SRT control PCB
11 SRT PWR-DC PCB
12 SRT MOS PCB
13 Preventive maintenance
13 External inspection of the radar sensor
14 Internal inspection of the pedestal
14 Magnetron replacement
15 Software
16 Tuning and performance monitor calibration
18 Timers reset
20 Diagnostics
20 SRT PWR-DC PCB LED indicators
20 SRT control PCB
22 Checking the radar sensor
24 Troubleshooting
24 Symptom table
24 Potential cause and corrective action table
24 TXRX missing data
25 Antenna failures
26 Main possible failures
28 Fault repair
28 Magnetron replacement
28 Circulator replacement
29 LNFE and RF Detector replacement
29 Limiter replacement
30 Noise diode replacement
30 Electronics assy disassembly
31 SRT PWR-DC PCB replacement
31 SRT MOS PCB replacement
32 SRT Control PCB replacement
32 Lisa SRT LAN down adapter PCB replacement
33 SRT MINI-PSU PCB replacement:
33 SRT LAN CPU PCB replacement
34 Electronics frame disassembling
34 SRT ADA PCB replacement
35 Brushless controller replacement
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Contents | SRT LAN radar sensor S-band down-mast Service Manual
35 Bearing reader PCB replacement
36 Brushless motor replacement
37 Gearbox with driving gear replacement
37 Performance monitor arm replacement
37 Rotating joint replacement
38 RF cable replacement
39 Pedestal replacement
40 SRT LAN down-mast transceiver replacement
41 Spare parts
42 System diagrams
42 Transceiver internal interconnection diagram
43 Pedestal system diagram
8 | Component overview | SRT LAN radar sensor S-band down-mast Service Manual
Component overview
Antenna and pedestal
A
D
F
GH
I
J
B
C
E
Description
AAntenna
BPedestal
CRotating joint
DPerformance monitor arm
ECover - motor side
FCover - electronics side
GCoaxial cable
HSRT down-mast cable
ISafety switch
JGrounding terminal
SRT LAN down-mast transceiver
A
BC D
E F
Description
ASRT down-mast cable
BPower cable
11
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Component overview | SRT LAN radar sensor S-band down-mast Service Manual
Description
CEthernet cable
DGrounding terminal
ECoaxial cable
FPlastic caps
Component location
Pedestal component location
E
C
D
A
B
Electronics side Motor side
Component Electronics side cover Motor side cover
AMotor unit √
BS-band gearbox with driving gear √
CADA PCB √
DBearing reader PCB √
EBrushless controller √
SRT LAN down-mast transceiver component location
A
B
D
E
C
F
G
H
I
Component
AElectronics assy (SRT Control PCB, SRT PWR-DC PCB, SRT MOS PCB)
BMagnetron
CCirculator
10 | Component overview | SRT LAN radar sensor S-band down-mast Service Manual
DNoise diode
ELimiter
FRF Detector and LNFE
GSRT Mini-PSU PCB
HSRT LAN CPU PCB
ISRT down adapter PCB
SRT down adapter PCB
ABC
D
Label Description
AJ1 Trigger output to connect a non Simrad display as slave
BJ3 Pre-trigger output
CJ6 Video output to connect a non Simrad display as slave
DTB3 Antenna data output to connect a non Simrad display as slave
SRT control PCB
Connector Purpose
TB1 Interlock
TB5 Performance monitor
Indice
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