Kongsberg Simrad RA83 Instruction Manual page 143

Chapter 8
Trouble Shooting And On Board Servicing
Tuning meter is faulty
Automatic tuning does
not function
No picture
Is the error message "MAGNETRON
CURRENT ABNORMAL" shown?
Does the MIC monitor voltage lies within
30 – 70 mV?
Is the video signal connection normal in
the Antenna Cable?
Main Logic PCB or LCD module is faulty.
8-16
Is the tuning voltage on J1-3
(IF PCB) about 2 V?
Y
Y
Perform the procedure
automatic tuning set up
Does the automatic tuning function
become normal?
Y
Finished
N
Y
Y
RA83/84/85/93/94/95 Series
N
IF PCB is faulty.
Check for the cable connection
between IF PCB (J1) and
Modulator PCB.
for
N
IF PCB is faulty.
Y
The magnetron is faulty.
N
MIC module is faulty.
N
Repair a faulty connection.
Operation Manual
93142105-02