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| Electronic UFies: HALP! |
by shargo |
2009-02-10 12:13:15 |
So I opened up my stereo amplifier to do a modification I had planned (changing how the EQ is connected but that's another story) about the first I noted was that both main capacitors had started to leak. Since this is a rather good Yamaha amp and I'm on a "limited budget" I don't want to replace it.
And if I can change capacitors on a motherboard changing two larger ones in an amp shouldn't be to hard. But for one thing: What capacitors to get...
Pics if that can be of use. The white card is a standard SD.
These are part of the power supply (Yamaha have been kind and clearly marked the separate parts on the circuit-board) and are marked as follows:
B
A C [ all these are in small circles
- and a larger circle around them all ]
A BLANK
B 63V 1000µF(M)
C BLANK
On top of them: 1DIAH
Have I got these things right?
The ABC- indicate that the current cap's have four legs but only two have function/connectivity.
The extra two legs are not necessary.
On the new cap the positive leg is shorter.
Questions
What type of cap should I get preferably?
How can I identify which leg is which on the broken ones?
Would this likely be a good replacement:
ESR:
Förlustfaktor: 0.1 @ 120 Hz (loss factor?)
Impedans: 0.042 Ω @ 100 kHz
Kapacitans: 1000 µF
Märkspänning: 63 V dc (Marked voltage)
Delning: 7.5 mm (separation (of the legs?))
Max rippelström: 1.75 A @ 100 kHz 105°C (max ripple current?)
Tolerans: ±20 %
Anything else this electronic amateur have missed? I know I haven't measured the spacing between the legs but is a bit tricky to get the circuit board out.
The local electronics shop is a bit of a lottery, some staff can surely help me pick a good replacment others... |
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[ Reply ] |
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As long as you can identify the + and - legs, you | by kc5sdy | 2009-02-10 12:24:08 |
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IMO, realistically, | by sgrunt | 2009-02-10 12:24:51 |
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i have never seen a cap with 4 legs | by laserman | 2009-02-10 12:26:28 |
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I've seen plenty... | by smiffy | 2009-02-10 13:22:39 |
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The last alternative seems like the case here | by shargo | 2009-02-10 13:35:18 |
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If you mean the big ones on the photos, those appe | by ttlogic | 2009-02-10 13:21:50 |
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Correct, 10000µF it was. (n/t) | by shargo | 2009-02-10 13:37:21 |
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Thanks all! Change cancelled! | by shargo | 2009-02-10 13:39:55 |
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