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chas10e

Holt security screw removal: Sears Pong / Sega EA carts

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I recently acquired a Dedicated Super Pong IV system & needed to open it up.

[img]http://imageshack.us/a/img526/5844/sam1442j.jpg[/img]

the screw in the battery compartment I discovered from reading these forums is called a "Holt" brand security screw

I happened to be placing an order with Best Electronics & they have never carried a screwdriver or security tip to remove this little bugger

E-bay has one for $19.99, but a little pricy for my needs!
http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5574883395&toolid=10001&campid=5336500554&customid=&mpre=http%3A%2F%2Fwww.ebay.com%2Fitm%2F3-Prong-Security-Bit-HOLT-6-Open-USA-Stock-%2F380339786487%3Fpt%3DLH_DefaultDomain_0%26hash%3Ditem588e0492f7

so I made my own & took some pics: 8)

Items I used:[list]
[*]3 paperclips
[*]an electrical wire-nut (with spring inside)
[*]a ballpoint pen
[*]electrical tape
[/list]
Tools I used:[list]
[*]needle nose pliers with cutters
[*]1/8" drill bit in a Dremel tool
[/list]
[img]http://imageshack.us/a/img803/1591/sam1450m.jpg[/img]

I drilled a hole in the top end of the wire-nut
straightened the 3 paperclips and as evenly as I could twisted them into the wire-nut so they would protrude through the top end I drilled probably protruding an 1/8"

[img]http://imageshack.us/a/img855/5769/sam1453r.jpg[/img]

I used an electrical wire-nut because, 1. I have plenty of them around & 2. the spring inside would hold the paperclips firmly
I used paperclips because 1. I have plenty of them around & 2. they are less pliable than copper wire so they will hold up better

trial & error one wire-nut was used & spring inside to loose , another was new & paperclips twisted & broke before protruding though end I drilled.

I emptied the ball point pen to tape to wire-nut so I wouldn't get stabbed buy cut ends of paperclip from bottom of wire-nut & gave me a bit of something to hold on to.

[img]http://imageshack.us/a/img20/4027/sam1443n.jpg[/img]


when pressing down to loosen the screw in the console, it seemed to form itself to fit better on the screw

[img]http://imageshack.us/a/img801/2759/sam1444a.jpg[/img]


The first image is actually the one I made to work on Sega Genesis EA carts with a similar Holt type security screw ( different size it appears )

[img]http://imageshack.us/a/img210/4792/sam1454k.jpg[/img]

the tines on the tip I made need to protrude out far enough to reach the screw that is recessed into the cartridge

[img]http://imageshack.us/a/img687/8092/sam1451j.jpg[/img]

I was able to re-install the all screws as well as remove them:

on the Pong console I wanted to maintain the integrity of a classic console
on the Sega cart ... just to see if it could be done. ... I discovered to was easier removing than replaceing you'll want to make sure it's seated all the way in.

I hope this helps:

chas10e

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If I recall correctly that screw is called tri-groove, I bought a few different size bits for them a few years ago. I think I got mine from grainger.

Mitch

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Whelp, those are a bit different than the Nintendo triwings. You might try making your own tool buy notching a mini flathead (like they use for eyeglasses) and using the outer prongs in two of the slots.

 

EDIT: just saw your photo. That's quite genius! :D

8EnaFN0.jpg

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