Koden MDC-7006, Installation Manual

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MDC-7000/7900 Series Chapter 5 Troubleshooting and on board repair
0092669002-07 5-11
5.3.2.3 No display
Is the display brilliance
maximum?
Does the LED (DS5, DS6)
on the main logic PCB
(E63-700*) flash on and
off?
Does the back-light of LCD
module turn on?
Yes
Failure main logic PCB (E63-700*)
No
Yes
Is the connection of Main
logic PCB (E63-700*)-J704
and LCD module correct?
No
Connect correctly.
Does the voltage of
J613-1, 2, 3 pins on the
back light power PCB
(E63-610*) +12VDC?
Yes
Back light power
PCB (E63-610*)
failure.
No
No
LCD module failure
Yes
Is the external monitor
displayed by the analog
RGB output?
Main logic PCB
(E63-700*) failure
Yes
No
LCD module failure
*Subject to version change
Yes
Press BRILL key, and turn BRILL knob
clockwise to display brilliance maximum.
No
Is the display of brilliance normal?
No
Yes
End