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MDC-1840BB/1841BB/1860BB/1810BB/1820BB Series Chapter 8
Operation Manual
Trouble Shooting And On Board Servicing
93142122-07
8-11
7. Operation Unit
Y
N
Y
Y
Correct faulty connections
N
Y
N
Operation Unit or Main
Logic PCB is faulty
N
The MENU key is faulty
Y
Y
Correct faulty connections
N
Operation Unit is faulty
Does the radar turn on?
Are the following connections
in Main Logic PCB correct?
1) J701 and Power Supply
PCB
2) J704 and Operation Unit
Press and hold the MODE
key and turn the radar on. Is
the radar started?
Is the connection
between the display
and ship’s main
supply correct?
Press the MENU key 5
times. Is the panel check
display shown?
Any faulty control or key
switch detected?
Detected control or key
switch needs to be replaced