Vintage MARANTZ Power Amp Board Restoration
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- Опубликовано: 23 июл 2024
- What tools do I use? • Must-Have Tools For Wo...
0:00 - Introduction
1:00 - Mechanical Disassembly
6:17 - Capacitor Replacements
10:23 - Semiconductor Replacements
15:46 - Component swapping and reassembly
19:51 - Test and Adjustments
Perform all work at your own risk. I am not responsible for any injury or damage.
In today's video, I restore the power amplifier boards on my Marantz 2250B. But this time, I go into a little more detail regarding component selection.
The 2250B restoration is almost done and I'm excited to make the "after" video!
This is the type of receivers I like to have
I'm a simple man. I see an AH-Fix-It video and I watch it. Happy Friday!
I found a 2230 in the trash and it looks like the right hand power amp is not functioning (heat sink doesn’t warm up either). Preamp output is fine. Will clean power switch. Fuses inside unit all have continuity. I suspect output transistors but I don’t have means to test them. Will just replace them as couldn’t hurt and proceed from there. Your video is very thorough and well explained. Appreciate the step by step walk through of the circuit.
I have a 2230 that I bought in 2013 and it's been an awesome unit. I just now had a power amp issue, which brought me to this vid. Good luck with your repair, it's worth fixing.
Well done, Very well explained and easy to follow. Excellent
im glad you have a clue i learn alot from your videos keep it going with marantz
Thanks! I am restoring a Marantz 2270 and this video is very helpful!
Another excellent video!Very well done mate 👍
Hey mate,
What are using to match transistors and are you applying any thermal grease between them? Thanks!
Awesome video thanks!
It's so informative and pleasant watching your demonstration and repairing. I have never seen you talk about Marantz 1130. I have one, it's working but the power indicator flies all the way up to the end over the red lines. And also left side speakers outlets are hamming. Do you have any suggestions? Thanks
Aziz
Very impressive video. Great work. Minor constructive criticism. Please get a plastic or ceramic adjustment tool. They're cheap, and you just should. Haha. Be well.
Just Bought the 2218 Cap Rebuild kit. I am sure it will take me way more time than your Videos! I Love my old Marantz 2218, it's actually easier then a1500 piece Jigsaw puzzle. I just need steady hands!
Can you do a fix on the p700 preamp board?!? I'm thinking about taking a whack at it but I'd love to watch you do it first lol. Love you videos and knowledge. Thankyou
Here's my video that might help: ruclips.net/video/bjVJCFh_phM/видео.html on the 2250B they call it PE01 for the preamp board.
From what I know, the power transistors must be sourced for used or dwindling new old stock. Some guys but "For Parts" units just for hard to find items such as this to keep in stock just for restorations.
I see you got the JIS screwdriver (though your text overlay called it a philips). You might call this screwdriver out as a JIS in one of your videos so viewers will get a heads up that there is a difference.
I realize this is older an may not get viewed quickly, what is the operational difference of the KW vs KA (power vs audio) series of capacitors? If the same spec, what if I use all KA's when replacing the electrolytics?
As general principle, do you change transistors and resistors if they are working?
Transistors sometimes yes, resistors no. Resistors rarely fail, and if they do, it was probably due to the failure of something else....like a transistor! I always replace the little TO-92 size transistors since most old ones are known to get noisy or fail. Anything bigger than that, it depends. On tuner boards I only change the capacitors since the transistors there rarely fail.
How Do you Charge?
how many actual watts does the 2250B have?
Check out my other video where I measure the power! ruclips.net/video/M_ohXEKIwW8/видео.html I will be measuring it again when the restoration is done for comparison.
are film capacitors polorized like electrolytics
Film capacitors are not polarized.
Hi AH, I miss the measurements (RightMarkAudio or SpectraPlus or ARTA or......)...
Next video I will use it. Just finished upgrading and restoring the preamplifier board and there is a difference before and after in the RMAA results!
@@AHFixIt OK, I'm keen on seeing those results !
can you sell me a kit for repair my marantz 1200b?
You wear googles and say safety is important and at the same time are wearing a metal ring on your finger. I like your videos but would be curious if you have any formal training in electronics. You seem to know enough to get the job done yet it doesn't appear you have nearly the experience or training compared to somebody like xraytonyb. Not criticizing you at all. I'm a bench technician myself and I do enjoy watching these since I'm also an audiophile. I definitely learn from these.