Marantz 2230 blowing main fuse and one fuse under the hood. find out why?
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- Опубликовано: 6 окт 2023
- this Marantz with a dead short, big issues but not hard to fix and it's back on playing music.
thank you for watching
#NTE280, #bias , #marantzblowingfuses, #DimBulblightup, #outputtransistorsshorted, 
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Another reason why I love your videos. You always get work that other would pass on. Great work Joe.
Excelente video! Muy buen canal!
Saludos desde Argentina!!!
Nice video and a common problem with amps of this age.
Good job.
Glad you enjoyed it
Thank you for your troubleshooting time! Another classic receiver given a new lease on life; enjoy your weekend!
Good job....looking forward to your next video.
Hey awesome video Joe! My 3rd year instructor for automotive would tell us stories of him fixing things like this. Interesting stuff. I look forward to the next one!
Just did a total restoration on mine. Lot of work!
Is that a class A output? Odd to see all NPN's on both channels. But then, I haven't downloaded the schematic and looked. :)
Excellente video Joe. I changed to capacitors that were way below their uF and once finish and connect all back again same ways was before, my main fuse blow, I replaced for another 1amp lower and again, it blow.
Im waiting for a similar amp/V and perform a last test, if not will start to check where the short is.
Ah ok...how where your outputs?
Where did you buy those long clip on connectors you used to set the bias? Nice video. Thanks!
Thanks for your videos. I restored my 2230, but the source indicator lamps ( phono, tape, aux etc.) keep turning on and off by themselves whenever they want. Most of the time when the receiver is cold they are on, and after 10 min they go off. Any idea why? Thanks
Nice job Joe.. wow surprised they still make the transistors for it. a little piece of an old credit card or member card makes a good spreader for the heatsink grease. messy stuff eh'
I know , I need to invent something to spread that paste better...less mess!!!
@@VintageAudioFever I found a little rubber tipped stick that is shaped like a spatula to use for spreading that goo. I think it was originally for makeup. Found it at the Container Store.
Ice cream sticks are equally good.
very interesting video! Would you share the details of your "dim BulB" box on the AC power supply? I have been interested in building one of those for years but very really investigated it.
Hi Richie
I got the idea from Rob's Fixit shop, only exception is I didn't put the speaker protected circuitry, I felt I really didn't need it as I am using TV speakers for just testing sound...I don't really care if I hurt them in any way haha!
Where did you buy these transistors? Because I have the same Marantz, with the same problem in the right channel
these NTE280's where ordered by the owner on amazon for 10$ each...
I have a cheap Walmart or autozone multimeter right now. I really need to invest in a good fluke meter amongst other stuff like a dim bulb tester, tone generator, oscillator. I'm dealing with dead channels on various amps/receivers, ect. What would be my first good purchase? If it's a multimeter which model do you recommend?
A good multimeter is very important
I have a fluke 177
Check the power supply first and foremost. The speaker relay cannot even engage because of your short. My 2220b was bought in 1977 and is still working perfect. Ask the owner if there was some sort of incident?
the transistors were shorted
I realized I should of used the word 'short' instead of open'...it's been noted.
Get a PEAK DCA55 or DCA PRO tester, man. You will not regret it.
OH! I have a Peak ESR70, I really enjoy on it's accuracy but I found my cheap device is pretty accurate also maybe when RUclips start paying me more than 30$ a month i'll look into it.HAHA!
it's pretty expensive but YES I agree, they work well!
thank you for your advice...I'll keep a eye open if they come on sale...
Did you connect two 8 Ohm dummy loads for the clipping test ?
Most likely he did, or he would get a much higher volt/watts reading. This amp is spec'd 30W both channels, 8 Ohm, no clipping
@@thulinpOr put more voltage into the input. It would surely got into clipping. It probably would have exceeded the specifications of 30W just before clipping.
Not professional
thank you for watching tho!!