Kongsberg Simrad RA83 Instruction Manual page 133

Chapter 8
Trouble Shooting And On Board Servicing
3. No display
Are the cable connections
between J709, 729 (Main
Logic PCB) and LCD
Monitor correct?
Y
Check if the status of
LEDs on the Main Logic
PCB is as follows'
1) DS1: ON
2) DS2: ON
Y
4. Antenna does not respond
Is the error message
"ANTENNA NO
RESPONSE" shown on
the screen?
Y
Is +12V on J701-20 pin
and GND normal?
Y
Is +12V present at
J2-2 in Antenna unit?
Y
Is +5V on J5-12 pin in
Modulator Unit normal?
Y
Are the antenna
connections at Antenna and
Processor units correct?
Modulator PCB or Main Logic
Y
PCB is faulty.
8-6
N
N
N
Disconnect
N
Connector J1 and check
if +12V on J701-20 pin
becomes normal.
Connect J1
Disconnect Modulator
N
Connector
check if +12V
J711-3 pin is normal.
Modulator PCB is faulty.
N
cable
N
RA83/84/85/93/94/95 Series
Correct the faulty cable connections.
Main Logic PCB is faulty.
LCD Monitor unit is faulty.
Antenna
N
Y
Disconnect
Modulator
Connector
and
J6 and
N
on +12V at J711-3
pin
normal.
Y
Performance Monitor is faulty.
Modulator PCB is faulty.
Correct faulty connections.
Operation Manual
Main Logic PCB is faulty.
Power Supply PCB is
faulty.
J4
check if
N
Modulator
becomes
is faulty.
Y
93142105-02
PCB