Turning on STacy only 2 times out of 10 does it start.

[Darklord]

Definitely check it!

[Darklord]

Okay, went back through my files and found a screenshot I'd taken of when I had problems with my screen.

In my ignorance, I had completely taken apart the screen, which is normally not necessary. I really just did
not know that.

Anyway, when I reassembled it, I wound up with what you see below:

Video Problems01.JPG (185.91 KiB) Viewed 1760 times

I got in contact with Brad at Best Electronics and using the advice he gave, got it working correctly again.
Please note that it took me multiple attempts, and it did not fix the lines all at once, but a bit at a time.

It did finally work though.

Here's a screenshot of his reply with advice on what to do:

Screenshot_20221221_001018.png (111.82 KiB) Viewed 1760 times

I hope this helps...

[Roberto]

I hope this helps...

Thanks for all these tips. I've done a lot of finger pressure and tapping on the edges of the panel but that line just doesn't come off.
I think I'll fix it later.
I'm actually trying to fix the backlight which is currently not there. Sadly that ground wire didn't solve my problem. I noticed that the internal electroluminescent panel (I discovered that it can be removed easily), is powered by the black connector with white/blue wires and that these are connected directly to the DC/DC. I've read the schematic and it appears that an 85V 590Hz alternating current voltage is flowing here. Could you confirm this for me?

I measured the DC/DC contacts near T101 with a tester (where that connector is actually inserted) but the voltage is at 0V...

Screenshot 2022-12-22 alle 21.49.08.jpg (73.16 KiB) Viewed 1665 times

[Darklord]

Apologies, but I don't have my STacy apart at the moment and thus no way
to measure that. Sorry!

[Roberto]

Apologies, but I don't have my STacy apart at the moment and thus no way
to measure that. Sorry!

Ah, I didn't mean for you to measure it directly in your STacy. Since I don't know about electronics, I was just wondering if actually (based on the diagram above), I had seen correctly, that is, that electroluminescent panel needs all that current to light up.

[stephen_usher]

Backlights do need that high voltage and high frequency. They are effectively fluorescent light bulbs which need to cause a gas to become a plasma.

[Darklord]

Ah, I didn't mean for you to measure it directly in your STacy. Since I don't know about electronics, I was just wondering if actually (based on the diagram above), I had seen correctly, that is, that electroluminescent panel needs all that current to light up.

Oh, okay. Well, I'm not very good at reading diagrams/schematics but Stephen answered so I hope that helps.

BTW, at one time I was going to power my STacy with one of those Pico P/S's but I couldn't figure out how to
get it to work with the original screen so I switched back to the old P/S. Point being here is a picture of the
P/S that came with the replacement El sheet I put in. You can clearly see the rating for it - it seems to go
along with what you found on the schematic.

HTH's...

Replacement El sheet PS.JPG (24.28 KiB) Viewed 1695 times

[exxos]

I measured the DC/DC contacts near T101 with a tester (where that connector is actually inserted) but the voltage is at 0V...

Are you measuring with your meter on AC ?

L106 line you need to backtrack and see if there is voltage there.

Q108 is the oscillator feedback circuit which drives the primary coil.

[Roberto]

Are you measuring with your meter on AC ?

L106 line you need to backtrack and see if there is voltage there.

Q108 is the oscillator feedback circuit which drives the primary coil.

Yes, I measured keeping in mind that the voltage is alternating current.
There is no voltage in that area, not even after L106 and not even on the 3 electrolytic capacitors that are near Q108 (in the capacitors I obviously set the multimeter to direct current).

Do you think it's that Q108's fault? I tried to see if I could find that new component on the internet but by inserting the code written on the front (D1060 R9H1) nothing comes out. I stop here because I don't know what I could do.
ah... Merry Christmas!!!!

[Roberto]

.... You can clearly see the rating for it - it seems to go
along with what you found on the schematic.

HTH's...


Replacement El sheet PS.JPG

Thanks Darklord and @stephen_usher ! Now I have the confirmation that that connector actually refers to that area of the electronic diagram. One thing that has nothing to do with all this ... I connected ultrasatan (which was in my Mega STE), on the Stacy .. and reads it! It works perfectly I hope to solve this problem with the backlight, because it seems to give problems even when turning on. uff

Merry Christmas to you too!