NAD 2200PE Restoration / Repair
ฝัง
- เผยแพร่เมื่อ 20 ส.ค. 2024
- In this video im restoring and repairing a NAD 2200PE power amplifier, one of the best NAD ever made.
they become quite rare, and when they pop up on ebay they are usually broken.
This Repair took much longer than i expected, so i couldnt keep the video under an hour. - วิทยาศาสตร์และเทคโนโลยี
"safety squint engaged" excellent quote and video!
excellent video gamerpaddy! you should consider doing more repair videos like this. its not easy to find good videos like this one on TH-cam, some of the guys go on and on about nothing important. and others can be difficult to understand, yours are very easy to follow. all the info you presented here has been useful in one way or another. incredibly informative . thank you so much for taking the time to release this. I learned a ton!
Awesome restoration, got them and are absolutely in love with them
I thougt that like this; don't use steele nuts on the output connections. You really are a good teathcer for all of us nerds and proes😊
I found a moment to pause and confirmed this 2200pe says made in japan. Obviously this particular unit has been abused. I have 3 nad's from this era all working great. All made in Japan units with the Shoei caps. I replace caps only if they test out of spec. These 40 yr old caps typically test within spec unless they are smaller value subject to higher voltage. Those tend to have 10-20 ohm esr and I replace them. Some of these shoeis that never see current (like on the input board) test as good as new, so i put them back. This is a hobby for me so i buy caps as needed.
in general a good quality thermal silicon pad does not require additional thermal paste. after a few heat cycles the silicone forms and fills in all the microscopic gaps...
(same is true for good quality thermal paste. a lesser quality thermal compound, as it expands and contracts during the heat cycles, will eventually migrate/pump out...)
proper mica pads can be v thin while still providing adequate electrical isolation. combined w/ proper thermal pastes they may offer a better thermal coupling but the thermal paste has a shorter life than the silicone pads.
there isn't one universal best solution but different products engineered for different applications.
not to be disrespectful but the amount of paste used for the transistors was excessive. it is very unlikely that it would impact the performance of the amplifier in any negative way but in principle it does nothing to improve it.
as a curiosity, for critical components such as performance CPUs and GPUs that can reach max temp in just a few seconds, it is understood and accepted that the best performance is obtained by using extremely flat heatsinks (to the point of polished) w/ a minimal amount of thermal paste, offering the greatest "metal to metal" surface area contact.
Ahhh Tin Pan Alley!!!
Brilliant video, thanks man. Please do more amp repair videos 👍
Superb video, very interesting process and I learned so much. Many thanks.
Compliments from me also.
👏👏👏
❤❤🎉
Really logic and good approach to the repair. Have you encountered this amplifier before?
Based in europe?
Which hardware vendors are you using? Tme? Mouser or digikey?
Regards desoldering gun, which mod did you make.
repaired 6 of them so far, really nice amp to work on. owned 4 of them as quadrophonic monoblocks few years ago.
nad knows how to properly design a enclosure.
yea, im located in germany.
im ordering at the vendors that have what i need in stock and at the lowest price for the quantity i need.
reichelt, kessler, tme, digikey, mouser, lcsc..
sometimes one has everything, sometimes i gotta order at two or more. last resort, aliexpress. 90% fakes but 5% rare unobtanium parts.
NAD needs easy access. They actually should have a latch instead of screws. They break too often! Great design by Mr. Edvardsen, but procurement chose Chinese shit components.
just like anyone else. cant imagine its worth saving a buck or two to go from panasonic/nichicon caps to chingchong, jingfun or whatever they are called. the whole recapping in this amp did cost me around 12 bucks in parts. i doubt it would be much cheaper with a bag of shitbrands but it surely lasts longer
main issue with all those amps from the 80s 90s even at accuphase which uses quality parts is the solder being used. it just cracks especially in parts that are thermal cycled a lot. main reason stuff fails. a single solder joint at the right location cracks then a transistor blows the whole thing goes up in smoke.
bad capacitors are usually not the reason for a failure, they may change the sound or start humming but dont cause catastrophic failure.
The harmonised nominal AC mains voltage across Europe is 230V AC; not 240V.
en.wikipedia.org/wiki/Mains_electricity
To turn the mains selector use a wider-bladed screwdriver which fills the slot and gives you enough torque.
it has been set to 220 someday and glued down, they tend to crack and fall apart anyways so just get rid of it and set it to 240 in case you are on the upper side of the tolerance