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Old 13 January 2010, 16:45   #1
Thorham
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Small A1200 problems.

Hi,

After replacing a faulty capacitor in my A1200, it works again. However, there are still some problems.

1. The disk drive doesn't work. This means the A1200 goes to the boot screen when turned on, and after a reset it takes a while to boot from the HD.
2. The serial mouse sometimes stops working after a reset.
3. SID music files played back with Hippo player hang the machine (this really isn't a software issue).

Is this also capacitor related, or is it something more serious? Note that the capacitor which I replaced is the one near the disk drive power connector. The original is an SMD 16V 47UF polarized electrolytic capacitor, and I replaced it with a non-SMD 63V one. Is this a problem (seems unlikely)? Could it be that the A1200 developed some non-capacitor releated problem because of the failed part?

Any help/suggestions are appreciated

Last edited by Thorham; 13 January 2010 at 17:19.
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Old 13 January 2010, 20:02   #2
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as long as the one that you replaced it with is 47 uF as well it should be fine.
The voltage is no problem at all, as long as it is equal or higher then the original one.

Did you turn the new one the right way?
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Old 13 January 2010, 20:40   #3
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as long as the one that you replaced it with is 47 uF as well it should be fine.
The voltage is no problem at all, as long as it is equal or higher then the original one.
Yes, it's a 47uF, 63 volt one (three times as big as the original).
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Did you turn the new one the right way?
Yes, I did. I made sure it is, or the new cap will just break again
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Old 13 January 2010, 22:38   #4
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Did you turn the new one the right way?

What does this mean?
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Old 13 January 2010, 22:49   #5
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What does this mean?
Polarized electrolytic capacitors have a plus leg and a minus leg (just like batteries have a plus and a minus). You have to connect them in the right way to avoid problems, such as the capacitor breaking down and the circuit that needs the capacitor not working properly.
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Old 14 January 2010, 11:35   #6
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http://cgi.ebay.fr/Caps-Amiga-Classi...item3a5685008a

If you should feel like replacing all of the caps, this is a good option.

He's quite cheap and delivery is really fast.
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Old 14 January 2010, 12:52   #7
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http://cgi.ebay.fr/Caps-Amiga-Classi...item3a5685008a

If you should feel like replacing all of the caps, this is a good option.

He's quite cheap and delivery is really fast.
Thanks, looks nice However, I can easily buy them in a local shop (although they don't have SMD caps there, which doesn't matter, because I can't solder those properly anyway ), so I can replace the caps immediately.
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Old 14 January 2010, 16:25   #8
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Thanks, looks nice However, I can easily buy them in a local shop (although they don't have SMD caps there, which doesn't matter, because I can't solder those properly anyway ), so I can replace the caps immediately.
i found it very easy to solder the SMD's just add a bit of tin to the pad and the pin and then solder one pin at the time making sure that it is straight before you do the second pin.

I think its a lot more tricky getting them off them adding the new ones
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Old 20 January 2010, 12:29   #9
Thorham
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i found it very easy to solder the SMD's just add a bit of tin to the pad and the pin and then solder one pin at the time making sure that it is straight before you do the second pin.

I think its a lot more tricky getting them off them adding the new ones
I think it's the other way around. Furthermore, soldering with my solder iron is a bit of a pain, because the tip doesn't get hot evenly
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