Kongsberg Simrad RA83 Instruction Manual page 134

RA83/84/85/93/94/95 Series
Operation Manual
5. Faulty radar picture
Is background noise
present at Gain max
position?
Y
Is the radar echo displayed?
Y
Is the receiver sensitivity
normal throughout the entire
range scales?
Y
Is the receiver
sensitivity low in long
ranges?
N
Does the sweep line
skip near the HM
(Heading Marker)?
Y
93142105-02
Is the error
N
"RADAR
ABNORMAL" shown?
N
N
N
Is the TX Drive signal on
Y
TP2 on Modulator PCB
correct?
N
Does the antenna
N
rotate freely?
N
Is the error message
"AZIMUTH ABNORMAL"
shown?
Y
Trouble Shooting And On Board Servicing
message
Y
VIDEO
Y
Modulator PCB is faulty.
Go to "9. Antenna faults, Pulse
selection not operative."
Is the error message
Y
"HEADING
ABNORMAL"
shown?
Y
Go to "9. Antenna
faults, Pulse selection
not operative"
N
Chapter 8
Go to "9. Antenna faults,
Radar echo abnormal."
Main logic board is faulty.
Go to "9. Antenna faults,
Radar echo abnormal."
Ｎ
LINE Main Logic PCB
is faulty
Main Logic PCB is faulty.
HM PCB is faulty.
8-7