Anritsu RA725UA, Instruction Manual

Page: 37 / 75

SECTION 5
REPAIR
This section describes how to locate faults and make repairs. If the radar malfunctions,
inspect
it
as
described below. If the inspection results indicate a difficult repair that cannot be made by the ship's
engineer, contact Anritsu or your sales agent and request repair. When contacting Anritsu or your
sales agent, provide the following information.
(1) Vessel name, port, repair period (ho
urs)
(2)
Radar model
(3) Serial No.
(4) Details of fault and inspection results if available.
Insure that you have read and understood the warnings
manual
before inspecting and repairing this radar.
5.1 Abnormal Microcomputer, etc.
(A) When POWER FAIL is displayed on the screen
This warning indicates that the radar internal +5 V power supply has momentarily fallen below
4.8 V. If this happens, the radar enters the Standby status and the Transmit key must be pressed to
continue operation. If this warning is displayed repeatedly, consider the possibility that the power
supply contacts may be bad or that the battery is faulty.
(B) When time display appears on screen
When the radar internal +5 V voltage falls below 4.8 V for more than several seconds, the time
display appears on the
screen.
This indicates that the CPU has been reset and that the radar is in the
Power on status. Although operation can be continued by pressing the Transmit key after the
display disappears, the power supply may be faulty.
29
in this instruction