Dashboard Clock goes off?

[CTScott]

That black spot does appear to be a normal part of how they manufacture the VFDs.

Since it is custom I can't find a data sheet for it. It would have been good if I could so that we could take some comparative measurements to determine if that is what is bad on yours.

[skoya]

Originally Posted by CTScott

That black spot does appear to be a normal part of how they manufacture the VFDs.

Since it is custom I can't find a data sheet for it. It would have been good if I could so that we could take some comparative measurements to determine if that is what is bad on yours.

When I loooked at it,from each angle and side,i could not see any soldering error or something like that.It leaves now to test this small circuit board behind it.Then we shall see.

[CTScott]

Originally Posted by skoya

When I loooked at it,from each angle and side,i could not see any soldering error or something like that.It leaves now to test this small circuit board behind it.Then we shall see.

The driver circuitry is actually on the bottom of the large board (where the large can shaped devices are). The small board on the back is the core board where the odometer data is stored and the main processor is located. I believe that that one is fine.

[skoya]

Ok Scott,here on this pic you can see these three transistors or whatever they are,seems to be burned.You can tell by their middle pins.I have isnpected them with ohmmeter,and the current flows on both sides instead of one.They are type MK 58.So when I turned the cluster on the other side,you can see clearly brown spots on this green pattern.Can you confirm that this could be the problem.You can see them right in the bottom middle section.

[CTScott]

Originally Posted by skoya

Ok Scott,here on this pic you can see these three transistors or whatever they are,seems to be burned.You can tell by their middle pins.I have isnpected them with ohmmeter,and the current flows on both sides instead of one.They are type MK 58.So when I turned the cluster on the other side,you can see clearly brown spots on this green pattern.Can you confirm that this could be the problem.You can see them right in the bottom middle section.

That could be the problem or at least part of it. On mine all six of the transistors in that area check out correctly with the ohmmeter. I believe the 58 is a date code, since mine are all MK 61 on one cluster and MK 68 on another.

[skoya]

Originally Posted by CTScott

That could be the problem or at least part of it. On mine all six of the transistors in that area check out correctly with the ohmmeter. I believe the 58 is a date code, since mine are all MK 61 on one cluster and MK 68 on another.

Where can i buy these.Is there anything on ebay,or some another web page.
And i need some characteristics for this type.

[CTScott]

Originally Posted by skoya

Where can i buy these.Is there anything on ebay,or some another web page.
And i need some characteristics for this type.

I am not sure. The MK alone is not enough information.