Hey Dave, I'm guessing this won't be one of your highest view videos, but as an old electronic tech myself, I am enjoying it. Keep up the Great videos. 👍
I love vintage gear. I'm using a Marantz 2220b that my son gave me some time ago. I installed a new face plate, new LED lamps and new vellum and it looks like a museum piece. I have other 70s amps and receivers too. Also, aren't most NAD amps broken? LOL
Exactly my thoughts. The diagnostic path which was followed, puzzled me. It started ok in the beginning, and the tech measured 34v ac on the hot side of the blown fuse. Good and logical step. But then things got a bit sideways fast. He was wondering why the main caps didn't get voltage. What? Which is pretty obvious off course. And later in the video started checking the primairy circuit of the transformer? I'm sorry, someone with so many years of experience, shoudn't make this kind of rookie mistakes. Like it's the first week on the job. Seems like a nice guy though.
It took nearly half an hour to determine that there was no voltage because of the fuses. As soon as I saw them on the underside and found out they were open I knew exactly why there was no voltage on the caps. The blank fuse clip holes in the board were also a dead giveaway. Many manufacturers made spaces for these but didn't populate them, or simply wired them across. I've seen it on many amps and other equipment.
@@MODAC If a audiotechnician with decades of experience, makes this kind of rookie beginner mistakes? Yes you can expect some critical comments. Sorry, but there are also people watching who are long term experienced in the field. The diagnostic path was just not correct and pretty irratic. It started good, but after that it was going round in unlogical circles. That's just the truth, and nothing more.
Just to note NAD made silver gear both amps and receivers, examples NAD 60 , NAD 130 , NAD 140 , all beautiful silver machines . Check also the history of New audio dynamics ( 1972 ) , very interesting stuff The quintessential NAD is of course the 3020 amplifier which is the best selling amp of all time
I had NAD equipment that had fuses soldered in it too and no one else was in it cuz I bought it new when it blew up I found these problems yep it's factory mine was cuz I bought it new and then when I opened it up to repair the fuses were soldered in there I repaired a lot of nads in my life and I found all kinds of sketchy stuff
definitely enjoyed watching the tech - - might be interesting if he puts it on a scope when he's done just to see if it can still perform up to it's original specs
Is this the same guy who couldn’t fix your awesome Cali Sound Labs CD player? which was strange as there are a few guys here and on YT who fix those things in any condition. I woulda taken that off your hands and got it fixed for sure🤗
This is great technical stuff and you did an exellent discussion together. Some more please!
I wanna see more in the future!
Yeah, I’d like to see more of this . Who wouldn’t?
More like this, please! Fascinating!😊
white paint spots al over the inside looks like it was open while someone painted the ceiling, as if someone was tinkering for a while.
Great video. Slow methods but very entertaining! Thanks
Cool looking unit, love the two meters on the left
More like this!
I love these kind of videos
Hey Dave, I'm guessing this won't be one of your highest view videos, but as an old electronic tech myself, I am enjoying it. Keep up the Great videos. 👍
I love vintage gear. I'm using a Marantz 2220b that my son gave me some time ago. I installed a new face plate, new LED lamps and new vellum and it looks like a museum piece. I have other 70s amps and receivers too. Also, aren't most NAD amps broken? LOL
I had one of those. Excellent sounding receiver with a uniqueness. Loved the gold and black
Perhaps not the most structured fault finding i ever seen.
Rule no 1: Check the voltage
No rail voltages => Check AC from the transformer.
Exactly my thoughts. The diagnostic path which was followed, puzzled me.
It started ok in the beginning, and the tech measured 34v ac on the hot side of the blown fuse. Good and logical step. But then things got a bit sideways fast. He was wondering why the main caps didn't get voltage. What? Which is pretty obvious off course. And later in the video started checking the primairy circuit of the transformer?
I'm sorry, someone with so many years of experience, shoudn't make this kind of rookie mistakes. Like it's the first week on the job. Seems like a nice guy though.
It took nearly half an hour to determine that there was no voltage because of the fuses. As soon as I saw them on the underside and found out they were open I knew exactly why there was no voltage on the caps. The blank fuse clip holes in the board were also a dead giveaway. Many manufacturers made spaces for these but didn't populate them, or simply wired them across. I've seen it on many amps and other equipment.
I was waiting for the “that’s not how you do it” comments.
@@MODAC
If a audiotechnician with decades of experience, makes this kind of rookie beginner mistakes? Yes you can expect some critical comments. Sorry, but there are also people watching who are long term experienced in the field. The diagnostic path was just not correct and pretty irratic. It started good, but after that it was going round in unlogical circles. That's just the truth, and nothing more.
@@MODAC Call it constructive criticism or friendly fire. it's normal for people to express their opinions on open platforms such as this.
sure, let's see more of the same please - it was fun, ty
Just to note NAD made silver gear both amps and receivers, examples NAD 60 , NAD 130 , NAD 140 , all beautiful silver machines .
Check also the history of New audio dynamics ( 1972 ) , very interesting stuff
The quintessential NAD is of course the 3020 amplifier which is the best selling amp of all time
I had NAD equipment that had fuses soldered in it too and no one else was in it cuz I bought it new when it blew up I found these problems yep it's factory mine was cuz I bought it new and then when I opened it up to repair the fuses were soldered in there I repaired a lot of nads in my life and I found all kinds of sketchy stuff
definitely enjoyed watching the tech - - might be interesting if he puts it on a scope when he's done just to see if it can still perform up to it's original specs
I enjoyed your time with Jim. Thanks. (I have a 7020.) Curious, if you don't mind me asking--how much did this repair cost you?
$185
@@MODAC Thanks. I hope you enjoy it. Looking forward to a follow-up review.
well, it was informative and entertaning. excellent video.
There is something weired going on here Dave. Great line!
Great vid.
Now we know why they charge so much to just try and see what's wrong!
Is this the same guy who couldn’t fix your awesome Cali Sound Labs CD player? which was strange as there are a few guys here and on YT who fix those things in any condition. I woulda taken that off your hands and got it fixed for sure🤗
He did fix it perfectly. Then I sold it.