Marantz 2250B Service & How to Bias Part 3 BG009

In the final episode in our 3 part series on the Marantz 2250B, we learn how to properly bias a Marantz amplifier.

[@sergiogomezphotography]

Thank you for this video, it’s giving me the courage to tackle my 2230b

[@abelouellette8051]

Hello Blueglow Electronics I have a Marantz 2250B series Amplifier exactly as the own in this video. I rebuild my amplifier with the help of your video and the service manual I download on the internet. The video about the service and bias is very informative. My unit is now working like new. Note: I replace all the capacitor in my unit according to information found on the internet.

[@breakerbroke23]

Thank you for the detailed information. My 2250b lost FM Stereo. I get FM and it sounds good but it is in Mono. I don't use FM much but would be nice to have all modes and functions working. Again thank you.

[@etowahtn2032]

Subscribed! All of the videos that i have had time to watch tonight that you have presented have been GREAT! I look forward to watching all of them. It is so exciting to watch and get answers to questions before having to ask. Learning to bias was on my list of things that I was wanting to get a better understanding of and why.

[@aGurlnamedLauren]

Hey there, thank you very much for this video! I now understand exactly what the issue is with my 2230 and how to properly fix it.

[@frederickmooney2305]

Thanks. Great videos. About to tune up a 2250. Scratchy pots and switches but it is still amazingly linear with sweep generator and square wave testing. I'll replace PS caps though, and look for any voltage problems. What's the difference between the 2250B and the basic 2250?

[@cobascis]

Thank you for this (and all your other) videos! Amazingly helpful.

[@subha-ardhnacchanandana7678]

Very complicates, lot of detour, yankee accent hard to understand, VDO no quality at all !!!

[@vintagestereo]

thanks for this great video

[@ninhnguyeninh1972]

Hello, my name is Ninh nguyen, I live in Houston, TX. I watch videos of how you work and I admire you. I apologize to you for my surprise but cannot be helped. Are you still doing the job as described in the video for now? I asked you like that because I have the Marantz 2250 amplifier which is in a non-working state, if you are still doing this can you help to repair the machine so it works again?

[@therealrip]

This is awesome! Thank you for putting this up. Save me alot of headache

[@dipudn2410]

Great video, it’s very helpful thanks 🙏🏻

[@georgethomas9436]

Replacing those pots with Borns resiters are great.

[@brig.4398]

thx for uploading this, I have an amp I want to adjust. thx for explaining what the various adjustments do.

[@thebigdogsquad7855]

Could this be the issue with my 2325. Sometimes when I turn it on cold. It'll start flexing my speaker cones real bad for several minutes

[@a-ber9978]

Hoy estaba reparando una MARANTZ 2250B pero no hice ajustes... quiero hacerlo. El ajuste numero 3 no entendi que es el VTVM y otra cosa, el amplificador que tengo aqui no tiene ese DIODO...puedes ayudarme.....saludos desde valencia - venezuela..gracias

[@0177MrGreen]

Excellent video, thank you.

[@JustiUrrego]

Hello, great video. My Power Supply is not giving 35V. I don't know what to do. Any help?

[@Blueglow]

+Julian Urrego Have you recapped the board? If not, start there

[@toneyisaiah8505]

As I said vintage audio equipment can be worked on by replacing older parts.

[@toneyisaiah8505]

Vintage equipment can be worked on by replacing worn out parts.

[@toneyisaiah8505]

You don't see a lot of vintage audio equipment these days.

[@toneyisaiah8505]

You don't 👀 a lot of vintage audio around too much anymore.

[@toneyisaiah8505]

You don't see a lot of vintage audio equipment these days.

[@hippydippy]

Ha! You haven't been to my house!