The Aussie Pinball Arcade
Aussie Pinball Forums => Archived Threads => Homepin => Topic started by: Homepin on September 21, 2012, 07:37:53 PM
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Moving along with the Hankin set of boards - still a fair bit to do on this but a solid start at least. Replaced the 6A diodes with 35A bridges and a heatsink - same as the Bally rectifier board. Changed the large electro cap to 6 x common (easy to get) types. Also labled the fuses (and will label the test points). Fitted the nice new gold heatsinks to the regulator and the transistor.
Probably start on the solenoid/lamp driver board next - it needs a major re-design however so that involves a fair bit of bench/design time first before launching into a PCB design.
(http://www.homepin.com/test/hps1.jpg)
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Those gold heatsinks are popping up all over the place... #@# #@#
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The Hankin fans will worship you
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Those gold heatsinks are popping up all over the place... #@# #@#
Yeah - lucky I ordered the new ones in gold as well - I didn't actually think this far ahead - hahaha - so now all heatsinks will match nicely ^^^
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You sure aren't mucking around there Mike . *.*
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All power to you Mike.
I'm sure these boards will breath new life into many machines that would otherwise be parked up or parted out.
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I received another power supply board from Ken this morning and it clearly shows where excess current on the G.I. pins has burnt the connectors. This was a common problem with most Hankin machines (as it was with all other manufacturers as well).
I have added an extra connector with 10A rated pins so the wiring can be slightly modified when fitting this new board to prevent the problem.
I have also started labeling up things.
(http://www.homepin.com/test/psprog2.jpg)
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Now that the Hankin MPU is finished we are pulling out all the stops to tidy up the power rectifier and solenoid driver boards. The Power rectifier is almost there with just a few tweaks required to have it off to the board house:
(http://www.homepin.com/pics/hps.jpg)
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Adding plenty of legends so it's easy to track down faults for the end user:
(http://www.homepin.com/pics/hps2.jpg)
(http://www.homepin.com/pics/hps3.jpg)
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I have only ever seen 1 Hankin! The Star Wars pinball at Mike Pacak's. Jpop
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The paralell arangement of the caps is interesting.Could you please explain the logic?
Would i be right in saying the uF is 6 times the individual value of each capacitor?
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The paralell arangement of the caps is interesting.Could you please explain the logic?
Would i be right in saying the uF is 6 times the individual value of each capacitor?
Yes, caps in parallel add together - so 6 x 1000uf would equate to 6000uf.
This overcomes both a space issue and also smaller value caps are easier to find.
I am waiting for the delivery of my Orbit1 so I can finalise the MPU and then it will be available for sale and I can quickly move to finish the rest of the board set including this one.
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Great work Mike
These boards suffered badly almost every power supply ice seen had burnt in atleast one place but usually more than one.
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Well this project took a back seat for a little while but with Pinfest looming I thought I had better chase it up! The PCB design is now complete and will be sent to the board house today. The few remaining parts needed will be sourced this week.
If you want to have a look at one come and see me at Pinfest.
(http://www.homepin.com/pics/HankinA5_final.jpg)
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Well the first small batch of blank boards has arrived. Anyone wanting to have a look at one can see it at Pinfest. I will have a made up one on display.
(http://www.homepin.com/pics/hankpowersupply.jpg)
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I have built up and tested a couple of these and will have one at Pinfest for those interested to have a look.
(http://www.homepin.com/pics/hankpsfinished.jpg)
(http://www.homepin.com/pics/hankpsfinished1.jpg)
(http://www.homepin.com/pics/hankpsfinished2.jpg)
(http://www.homepin.com/pics/hankpsfinished3.jpg)
(http://www.homepin.com/pics/hankpsfinished4.jpg)
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As a serviceman it ALWAYS annoyed me that when you went to measure a voltage or look for a particular part on a board all you found was "TP2" or "C34". I always thought that was next to useless unless you had a circuit diagram and even if you did you would have to refer to it to find exactly WHAT TP2 or C34 was. All electronics manufacturers are guilty of this not just pinball.
There is simply no need for it - it's plain laziness, nothing more. Where board space permits I always add information that I believe aids servicing or adjusting. Build quality is a different thing. I guess it must be weighed up how much extra the brass resistor spacers cost, the time it takes to add an extra screw in a heatsink to make sure it can never spin out of place and so on. For this board these (and many other) little extras probably add $1 to the board cost - that's all.
(http://www.homepin.com/pics/hankpsfinished5.jpg)
(http://www.homepin.com/pics/hankpsfinished6.jpg)
(http://www.homepin.com/pics/hankpsfinished7.jpg)
(http://www.homepin.com/pics/hankpsfinished8.jpg)
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Nice one Mike @@* @@*
I think it's a top idea that you labelled everything/ test points with voltages etc ^^^
will make life sooo much easier for anyone repairing the boards should it ever become necessary.
I'm not sure if i'll get to Pinfest this year due to band gigs in Armidale, but i'm gonna try to get there for the Sunday at least (will drive from Armidale straight to Newy, then home). So if i do make it there i'll definitely come and say g'day and have a look at what you have there *%* *%*