Kongsberg Simrad RA83, Service Manual

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1. GENERAL
1.1 Purpose
This service manual provides radar service technicians with the practical knowledge required to
maintain, troubleshoot, repair and re-adjust the marine radar RA80/90 series.
1.2 General Precautions
(1) Before servicing the radar, every serviceman must carefully study the contents of the
instruction manual together with attached drawings.
(2) When troubleshooting, first check that all visible wiring connections are secure and all
connectors are plugged into their mating connectors. Also confirm that all controls on the
front panel of the display unit are properly adjusted.
(3) When a faulty part is located, always remember that the prime cause might be elsewhere.
Check for prime causes of problems and repair them to prevent recurrence of the same
trouble.
(4) When reconnecting cables, PCBs, or units, after inspection or repair, observe the following
precautions.
(a) Positions correct ?
(b) Connectors properly mated?
(c) Any undue strain on wiring?
(d) Screws adequately tightened?
(5) Inspect for paint peeling, metal surface scratches or blemishes. Slight blemishes can
develop into severe corrosion. When imperfections are found, promptly sandpaper, and
retouch, or repaint these parts with a suitable paint brush dipped in clear lacquer.
1.3 Tools and Measurement Jigs
Maintenance tools and measurement jigs necessary for maintenance and adjustment of the
radar are listed below.
Table-1.1 Tools and measurement Equipment
No. Name Type Use
1 Tools
a Screwdriver Phillips Type (4mm, 2.6mm) opening unit cover
b Monkey Wrench
c Electrician's Pliers
d Long-nose Pliers
e Nippers
f Tweezers
g Soldering Iron
2 Special Tools
a Adjusting Screwdriver Adjusting trimmer cores of RF transformer and variable resistors
1.4 System configuration for radar models
1.4.1 non-IMO models
model
scanner processor operation display
RA83/93 RB717A RP100A RO100A user supply
RA84/94 RB718A RP100A RO100A user supply
RA85/95 RB719A RP100A RO100A user supply
93842105-00
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