i see the resistors are 22R but what size are they 0805, 0603 etc, im sure it has the bit DisMo which is covering the chips but will verify later
ACA500+ stopped working (E5)
- hthnightwolf
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Don't Panic. Please wash hands.
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They are 0603 resistors.
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thank you for that Jens, i will check later and i can then order some
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I have just checked the board and it does indeed have the 2 x22R resistors of shame and looks like one is burnt so will order some
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If you're absolutely sure that you won't plug the unit upside-down again, you can also just bridge these resistors. The 22R value is just to make sure that the resistors do burn up and the protection diodes don't take too much current.
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ah right ok I have ordered some but I can bridge them to test it over weekend
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checked the resistors of shame and found only the outer one blown so bridged it as you suggested and it's back up and running, I've ordered so.e 0603 22r resistors so will replace it when they arrive.
I will be ordering 2 cf sockets as well and some 0.02mm enameled wire to tray and repair the missing cf sockets and see if I can get it back to factory spec
Thanks Jens for your advice
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Hi,
My ACA500Plus today developed this exact issue, it had been working fine up until this point and was happily sitting inside it's plexilaser case.
The card has never been inserted the wrong way round, so I can't be sure of the cause.
Your advice is greatly appreciated.
Regards,
Steve
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Try cleaning the 86-pin port, double-check your PSU.
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I've managed to solve the issue, in my case one of the onboard Ram chips had worked loose and just needed pushing back in.
I noticed that when unplugging the ACA500Plus I was getting a green screen, which pointed me to a memory issue.
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Funny - normally it's the Agnus chip that has contact problems. Your computer must have been in repair at some point, as memory chips are normally not in a socket. It's always interesting to speculate about the past of a machine
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So my original A500+ motherboard suffered the dreaded battery leak (something I will rectify one day), so I purchased a Black A500++ motherboard and created a new fresh motherboard to go along with my ACA500Plus. I must have not quite pushed all the ram chips in properly when installing and moving the Amiga to it's new pride of place must have jogged it out.
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Oh - so in this case, you do know the complete history of the board
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The last reply was more than 365 days ago, this thread is most likely obsolete. It is recommended to create a new thread instead.