Kongsberg Simrad RA83 Instruction Manual page 139

Chapter 8
Trouble Shooting And On Board Servicing
8. Others
The display synchronization
is unstable.
Are the following sync signals present at TP12 and TP13 in Main
Logic PCB.
[TP12]
5 V
0 V
15.6 µs
1.04 µs
Is the RGB signal presented at
the J218 and J219 connector?
Texts and graphics displays are erratic.
9. Antenna unit
+12V line is shorted.
8-12
[TP13]
5 V
0 V
16.66 ms
Y
N
Disconnect P6 (J6) from the
Modulator PCB. Is the fault
removed?
N
Disconnect P5 (J5) from the
Modulator PCB. Is the fault
removed?
Y
Disconnect P1 (J1) from the
Modulator PCB. Is the fault
removed?
Y
RA83/84/85/93/94/95 Series
N
Main Logic PCB is faulty.
46.9us
Y
LCD monitor unit is faulty.
Main Logic PCB is faulty.
Main Logic PC B is faulty.
Y
IF PCB is faulty.
N
Performance Monitor is faulty.
N Internal wirings in the Antenna
unit or Processor unit is faulty.
Modulator PCB is faulty
Operation Manual
93142105-02