Chapter 5 Troubleshooting and on board repair
MDC-7000/7900 Series
5-10
0092669002-07
5.3.2.2 Cannot turn on the power
Is the power cable
connected?
Is the Operation unit cable
connected to the Display
unit correctly?
Is main fuse blown?
No
Yes
Correct the connection.
No
Correct the connection.
No
Yes
Remove antenna cable
connector from the display.
Is main fuse blown again?
Is power supply voltage
within normal range?
21.6 to 41.6 VDC
No
Reconnect to proper
power supply.
Does the voltage of
J710-17, 19, 21 pins on the
main logic PCB (E63-700*)
+12VDC ?
Yes
No
Power Supply PCB
(E63-600*) failure
Is fuse properly rated?
Yes
Exchange fuse.
Is inboard power polarity
correct?
Yes
No
Yes
Reconnect correctly
No
Is there not a contact point
in the antenna cable?
No
Power supply PCB
(E63-600*) failure
Yes
Antenna cable failure
No
Antenna unit failuer
Yes
No
Connect connectors
correctly
Yes
Is power supple capacity
enough?
No
Change power supply
Do all connectors connect
properly?
Yes
Main logic PCB
(E63-700*) failure
Yes
*Subject to version change
Содержание MDC-7006
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