Mcintosh Mc2205 Exploding Capacitor Repair & Restoration Part 2
HTML-код
- Опубликовано: 9 янв 2024
- Complete electrical restoration of a Mcintosh Mc2205 stereo power amplifier. Replaced all electrolytic capacitors, replaced thermal grease, cleaned all electrical contacts, adjusted the bias and calibrated the power meters.
Авто/Мото
Great video restoration series. I restored a C32 and C33, MC2205 is next.. Was able to find the Computer Grade Caps with recent date code, ordered the rest of lytics caps. Got lucky and found some 36VDC relays.
A little constructive criticism... only remove one Cap at a time and replace it. This may take longer. However, removes the chance of errors and possible wrong Cap installation. You are doing a great job, keep up the educational videos!
Hello teammate!
Thank you, thank you, thank you so much! Very good advice! I really appreciate it.
🙂🙏💥💥💥
Thanks for this very informative videos, I recently got a 2205 I'm restoring it ❤️🔊
Hello teammate! That’s absolutely fantastic! Don’t hesitate to reach out if you have any questions.
🙂🙏
Yes sure thank you I appreciate that 🙏
I like how you say that "It will eject all the electrolyte" haha.
I popped a big power supply cap once, the worst part is the smell! My shop stank for 2 days!
Hello teammate! Your comment had me laughing!
This one smelled like 3 day old fish!
😂😂😂
A capacitor replacement kit would be nice if you have time to do one.
Super informative, thank you,
Thank you very much teammate!
🙂🙏
Thank you for the good and interesting video, that's great.
I would also like to restore my MC2205.
I live in Germany and my device has 240 volts.
What do you think of the idea
A list of the parts you need to replace so that interested parties can order the parts.
The manufacturer of the capacitors used would also be good.
Please keep up these good videos
Thanks again
Hello teammate!
Thank you so much!!!!
I could put a kit together, but in the meantime, please feel free to reach out if you need help with the parts selection.🙂🙏
hello tiny,
many thanks for the quick response.
It would be nice if you could put together a repair set for me and send it to me.
please tell me how much it will cost including shipping to Germany.
I have another question, my device has 240 volts, I think that is important for the selection of parts.
I saw an offer on eBay for a repair set for the MC2205.
that costs about $160 plus shipping.
what do you think about that? is it good?
Many thanks for your quick answer.
regards Henning
Okay boss another question the .15 ohm 5 watt resistors in the output transistors on those big heat sinks. Have some way our of specs but a I can find are wirewound resistors now I have read that you shouldnt use wirewounds on common emitter amps. what are your thoughts, Mc2205
Hello teammate! Those are wirewound resistors. Is that your question?
And are you sure that those are out of specs because I have never seen those get out of specs.
Why won’t resistors are usually spot on?
Make sure nothing is affecting your measurements.
Good luck!
@@Tinybench I have one that tested over 9 0hms I know thats weird but the meter is accurate so I have no explanation.
@@shaknit 9 Ohms??? WTF!!!!
Lift one leg off the PCB and then measure it. I really think something else is throwing off the measurements. By lifting one leg of the circuit. It will isolate the resistor, and I bet it will measure spot on.
Teammate if you haven’t, please subscribe. I would really appreciate it. Thank you so much.
Hi. the 2 little caps by the input switch the last ones you replaced are the polar or nonpolar. Thanks. Great job btw. Love these old amps
Nonpolar, Nichicon audio capacitors.
Tiny bench, I have a question for you regarding them two non polar capacitors by the input 2.5v and .75v level switch. In the service manual it states it's slot c229/c230 poly .01uf 2.5 63v. My current amp that I am going through has two 1uf 80v in there currently? All the different schematics for the mcintosh mc2205 say it's non polar! And this non polar capacitor seems hard to find, could you share where you located these capacitors. Thank you in advance ☺️
Hi interesting thing I just discovered. I always thought that the big power supply caps were connected in parallel but I looked at the schematic and they are connected in series which would cut the capacitance in half and double the breakdown voltage. Hmmm.
Hello teammate! They are not connected, neither in parallel nor in series. They are two different circuits, sharing a common ground.
One capacitor is for the positive rail voltage and the other capacitor is for the negative rail voltage.
Make 100% sure that you lined up the vents on the capacitors with the holes in the chassis of the amplifier or they will explode and eject large amounts of electrolyte.
Each circuit has 39,000 uf capacitance.
🙂🙏
T@@Tinybench The schematic looks to be in series because the positive side of one of the is connected to ground . The pos output is connected to the positive side of one of the caps and neg output is connected to the neg side of the other cap. Check the schematic see if I'm reading it wrong.
@@shaknit
Hello teammate. I am not sure what happened but I already answered this question. Please refer to my previous reply.
I explained that they are not connected neither in series nor parallel. One capacitor is on one circuit, and the other capacitor is on a different circuit. If you know any electrical engineers, maybe you can give them a call and keep in mind that if you why are these incorrectly, they will explode.
@@Tinybench Go look at the schematic. It is in series
@@shaknit
Hello teammate the Amplifier has two rail voltages. One is positive and one is negative. The positive side has a 39,000 µF filter capacitor and the negative side also has a 39 µF filter capacitor. These are two independent circuits that do not interact, neither in series nor in parallel, but simply share a common ground. I am very familiar with the schematics diagram as I have been staring at them for years.
Whether you think they are in series or parallel it, doesn’t matter as long as you connect them correctly.
But notice how each capacitor is enclosed in its own circuit. You just have to look at the schematic diagrams in a different way.
What I think is confusing you is the fact that on the negative rail voltage side, the positive side of the capacitor is grounded, which makes it look like a series connection.
Just make sure you line up the vent on the capacitor with the hole on the chassis of the amplifier or it will go Boom. 🤣😂🤣😂🤣
What is the part number of the filter caps that you use. thanks
Teammate unfortunately, those are now obsolete but I’ll get you a link for one that will work. They will be available in April DigiKey, and mouser. They run out if you need it right now I can send you a link for one that is the exact same size but 47,000 µF it’s still OK because the originals are 39,000 µF but with a -10+ 75% tolerance.
@@Tinybench I found some 100,000uf cans that would fit but thought that might be too much without a some kind of soft start up.
@@shaknit brother, 100,000 µF is way too much.
This one will work perfectly
Nippon Chemi con
47kuf +-20%
80v
3” Diam
3.125” height
1.250 lead spacing
Part # E36D800HPN473ME92U
Available at DigiKey for $37.19
@@Tinybench Thank you for the info. You can get them from Mcintosh labs but they are $120 each.
power hi end brazilian sound
Thank you!😊
vielen dank für das gute und interesante video, das ist klasse.
ich möchte meinen MC2205 ebenfalls restaurieren.
ich lebe in Deutschland, und mein Gerät hat 240 volt.
was hälst du von der idee
eine liste der teile zu machen die du ausgetauscht hast, damit sich die Interessenten die teile bestellen können.
gut wäre auch der Hersteller der verwendeten Capacitoren.
mache bitte weiter mit solchen guten videos
nochmals vielen dank
hello tiny,
I hope you can remember my question
I asked you if it was possible that you could put together a repair kit for an MC2205 for me.
I would like to know how much it costs including shipping to Germany.
Kind regards from Germany
Hello teammate!
Sorry for the delay. I have been swamped with work. I will get back to you shortly.
I have seen kits on eBay but I prefer to use different capacitors that have given me really good results.
I will put my kit together and sell it on eBay in a couple of days.
I’ll get back to you. Thank you very much.
Okay,
I will wait for the kit.
Please let me know, when the Kit is on eBay
Regards from Germany
Thank you
@@TinybenchDid you ever get the repair kit put together and up for sale. When I try to adjust the bias it never stays where I set it just fluctuates
no to 3 transistory 5200 e 1943
🙂🙏
shalom yahvah you yhwh
🙂🙏
Amature Hour
🙂🙏
He may not be the most knowledgeable at electronics, and he says in this video that this is his hobby, and loves doing this. And that's what matters the most.
Maybe instead of trying to insult others in RUclips, you can work on your own hobbies... Or is this your biggest hobby?
I don't know you, but you may be a great technician. But I'd take an amplifier to this man before I take it to you and your hard heart.
@@KE8UYV Thank you very much teammate! I think he meant the video itself is for amateurs.
Either way , I am glad he watched the video and commented! 🙂🙏💥💥💥