PE Plus Help

[Jadman]

That is vertical collapse. Most likely LA7830, #192 vertical IC. Jay is correct, a 1492 does not have a horizontal line when it has no input, it should have a dark screen with occasional sparkle, nothing more. The great news is that the flyback and power circuit is working. You do not need a new board. You are very close.

The sound you are describing is abnormal too, you have to replace the Vertical IC before you can proceed. There is also a surface mount capacitor on the PRA-H board. You can replace it with a radial capacitor, it looks funny but it works fine. But I doubt it being bad will cause V collapse.

Chris

Thanks Chris - well i might have got too excited to soon because it only powered on once! cant repeat the screen coming on with the line again sadly....

The Vertical IC at position #192 is the chip attached to the heat sink right attached to the board through about 7 points?

And i assume the PRA board is the board that plugs into the tube itself (apologies im still figuring out the scematics) looking at that the capacitor i see that i imagine you are referring to is #414? Any idea what uf/v that is?

[jay]

Any resistance setting on a multimeter should work.
Holding the two probes away from each other you should have a value of 1 if it’s a digital.
This means infinite resistance (no connection).
If you touch the probes together it becomes 0 meaning you have no resistance and it’s a dead short.
If you are using a traditional meter with the probes apart the dial doesn’t move and when you short them the meter jumps to the other end.

When you remove the fuse and touch each end of the fuse with the probes it should behave exactly like you have touched the probes together. If it doesn’t you have a bad fuse.

Per the fuses make sure you replace with slow blo and not quick blo

[Jadman]

Any resistance setting on a multimeter should work.
Holding the two probes away from each other you should have a value of 1 if it’s a digital.
This means infinite resistance (no connection).
If you touch the probes together it becomes 0 meaning you have no resistance and it’s a dead short.
If you are using a traditional meter with the probes apart the dial doesn’t move and when you short them the meter jumps to the other end.

When you remove the fuse and touch each end of the fuse with the probes it should behave exactly like you have touched the probes together. If it doesn’t you have a bad fuse.

Per the fuses make sure you replace with slow blo and not quick blo

Ok fuses checked and working - seems i was using the multimeter correctly all along. My multimeter beeps when there is no resistance.

So developments - Im going to keep working through this repair but i fear i have some damage to the circuitry on the board which id causing some issues, i may have contributed to scratching some of the copper off whilst i was removing old components - so im going to need to repair the monitor board as i go as well.

Ive asked Chris if he has a working board he can ship me as well so i have something i know works.

Ive also purchased a PE+ superboard with multi poker from one of the ebay links on this site, and some set and clear chips also so i know i have an MPU that works as i work through repairing the one thats in the machine currently.

This is incredibly exciting for me as in AUS we never got the Video Poker that you guys have in the US - i spent hours playing that at the bars in Vegas when i have been there several times and this is what i really bought this rig for, i was just going to emulate the Video Poker through MAME though. This way i can set it up on original hardware and maybe get my mates to put some real cash into it.

So i might be someone with more money than sense but at least ill get to work on pulling together the project that i actually want, and if im reading some of these topics correctly, if my Program ROM (Blue Moon AUS) is still good, then i can also swap that back into the new MPU if desired.

Once again i cannot thank you all enough for the guidance you have provided, i like to think im pretty handy with the home repairs but i wouldnt have even known where to start without the wisdom of this group.

Thankyou so much!

[jay]

lol I think you echo the sediment that most of us have…….

When I die please do not let my wife sell my toys for what I told her I paid for them……