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honestly, switchers are $10-15.
I can't get a switcher for less than $25.....Where are you getting yours? That's a great price.
Edward
I can't get a switcher for less than $25.....Where are you getting yours? That's a great price.
Edward
We "all" should know the problems associated with putting a switcher in any Williams game by now.
We "all" should know the problems associated with putting a switcher in any Williams game by now.
We "all" should know the problems associated with putting a switcher in any Williams game by now.
Replacing the power supply with a switcher is not the question anyway.
The question is... Repair cost, where do "You" draw the line?
Mod, the first pic was something like $18.50 and the second pic was something like $22.50.
There are problems? I ran a switcher in a Joust without issue. Please educate me so I am "in the know".
I'm too lazy to find any of the threads, but the short version is that the original Williams boards (and any close knockoffs, but apparently not the JROK board (unless I've just been real lucky)) rely on the +5V lasting a few milliseconds longer than the +12V. The 6809 CPU has an annoying habit of writing random values to random locations in memory (including the CMOS high score and settings) while it is being powered down (a leftover from the 6800 series). The Williams designers recognized this and added a much larger than necessary capacitor on the +5V to power the CPU and added a circuit that trips the CMOS write protect circuit when the +12V goes down.
Switchers don't have this. Both +5V and +12V go down at the same time and the CPU sprays the memory space. Because it is random, the CMOS may only get hit once in a while or it may get hit every time. The worst case is when the CMOS gets set to funny (but valid) settings and suddenly your game is no longer on freeplay or you start with 0 men (very short games) or you are set to impossibly high levels of difficulty to start.
There is a good reason for rebuilding/replacing your existing linear power supply with an original one, unless you don't mind losing your high scores and settings periodically.
ken
This message is too short????
Dok, I'll see your 2 boards and raise you one with soldered in wires in place of the headers, BR2 with a crack, no BR1 or fuses and a missing trace from the main AC to Fuse 5. That one was a mess. I don't even know how much I put into fixing it partwise.
Unless somebody is sitting on a big stash of mint PS boards, I'm afraid the low hanging fruit have been picked. It's going to be hack city from here on out.
ken