Star Trek 25th Data East Club!

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By Rondogg

7 months ago


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  • Started 7 months ago
  • 67 posts
  • 18 Pinsiders participating
  • Latest reply 1 day ago by Rondogg

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There are 67 posts in topic. You are on page 2 of 2.
#51 5 months ago

Looking to see if anyone has a game rom 1.9 for sale...or a copy of the files needed to burn the rom.

1 week later
#52 5 months ago

Hello DE ST fans. Great input and great pics. Appreciated. I have a silly question.....Does anyone know where this plastic goes. Be damned if I can remember where it was. It is the last thing I am doing on my restoration.... thanks in advance... Jumpin Jack from Australia. Pics of final restore will follow.

DE ST 5 (resized).jpg

#53 5 months ago

Right below the rollover lanes to left of rt ramp.

#54 5 months ago

You can see the plastic on the very first picture in this thread.

20160729_140147_HDR (resized).jpg

#55 5 months ago

Am I the only one that want to line the ramps with UV LEDs so the Pink accents really pop?

#56 4 months ago

has anyone swapped the fan out on this for a quieter one?

Cheers,
Neil.

#57 4 months ago
Quoted from NeilMcRae:

has anyone swapped the fan out on this for a quieter one?

I haven't - but I'm about 90% sure you'll eliminate most of the noise if you simply "space" the fan away from the back of the backbox.
On my machine the fan is bolted to the very small oblong hole in the back of the machine. This means there are mms of space between the fan blade and solid wood. 60% of surface area of the fan is "blocked" by the wood.

Computer Case modding 101 says you need to put some distance between the cutting area of the fan blade and the rear of the case. This will reduce your noise by a massive margin.

One of these days; I'm going to design a simple Spacer bracket and give it a shot.

2 weeks later
#58 4 months ago

thanks - will give it a go.

#59 4 months ago

Do they have "stock" downloads, or do you always have to create your own content?

#60 4 months ago

I meant for the Pinsound card... sorry for any confusion

3 months later
#61 27 days ago
Quoted from NeilMcRae:

has anyone swapped the fan out on this for a quieter one?
Cheers,
Neil.

Why is the fan necessary? I understand that it gets warm in the backbox, but why does this pin get warmer than others? I have a Batman Forever with essentially the same board set and no fan.

The 27 ohm cement resistors in the lamp matrix on the MPU put out a ton of heat. If those are removed (which can be done when replacing the TIP42s with MOSFETs) I wouldn't think the fan would be necessary. I picked up a DE Star Trek yesterday and I thought that a previous owner had added the fan since I had never seen one before in a backbox (I've only been in this hobby for a couple of years). It is very noisy. I unplugged it and the noise was replaced by the notorious Data East speaker hum!

2 weeks later
#62 10 days ago

I'm going to be looking for a DEST in the Southeast soon. Anyone selling?

1 week later
#63 2 days ago
Quoted from NeilMcRae:

has anyone swapped the fan out on this for a quieter one?
Cheers,
Neil.

I swapped out the TIP42s in the lamp matrix for MOSFETs, which allows for removal of the 27 ohm cement resistors that throw off a ton of heat. I then removed the fan. No more noise!

Here is a link to Pinwiki with instructions on removal of the TIP42s and the big resistors:

http://www.pinwiki.com/wiki/index.php?title=Data_East/Sega#Using_MOSFETs_in_the_Lamp_Matrix_Circuitry

It is not a tough job, just a little time consuming.

The first picture is before work started (with the cement resistors and TIP42s). The second picture is after their removal and replacement with 1k ohm resistors and MOSFETs (some resistors on the front of the board and some on the back). Also of note in the second picture is that RA8 has been removed (middle-left in the picture). Notice the discoloration of the board from the heat.

IMG_1746 (resized).JPG

IMG_1751 (resized).JPG

IMG_1755 (resized).JPG

#64 2 days ago
Quoted from FiatsRUs:

I swapped out the TIP42s in the lamp matrix for MOSFETs, which allows for removal of the 27 ohm cement resistors that throw off a ton of heat.

Looks neat & tidy. Nice soldering work.

#65 2 days ago

I've seen people do this. Why is it necessary?

#66 1 day ago
Quoted from Rondogg:

I've seen people do this. Why is it necessary?

It is not necessary. The performance of the game will not change if you do this. As with some other modifications, it is an improvement on the old technology with now-available newer stuff. The cement resistors consume a fair amount of energy that is dissapated as heat inside the backbox. The heat damages the board over time (sometimes to the point of failure) and generally contributes to an unfriendly environment in the backbox for the rest of the old componentry. It is a low-cost way to fend off future issues.

#67 1 day ago

Thanks. I only like to deal with problems after they occur and multiply. The more expensive the better has always been my history.

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There are 67 posts in topic. You are on page 2 of 2.

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