Bose ps321 av321 system dead

[@danielmeecham464]

You sir, are by far and away the best technical adviser I've seen. You're my go-to-guy for the straight up sensible electronic repairs. I just came by three older Bose subwoofers that need some attention. Thanks Man!

[@levigrenko2831]

I found one of these left over from someone’s move and it wouldn’t power on. Literally heated up the soldier and did this exactly and less than 5 minutes after starting the fix it turned on. Amazing and you are THE MAN.

[@djijspeakerguy4628]

Great job fixing the BLOWse. I have two of these that are only the speakers one of which is unpowered stereo, and the other is powered surround sound, and the both work great!

[@donslagle1162]

I have a non working AV321 No power coming out of the bass unit. I checked pcb, no problems. Have current at fuse I did notice a large pool at the bottom of large capacitor, looks like varnish , is that normal Plus,,how can U check power at capacitor ? Ty

[@richardgrant4666]

5 minute repair works like a champ! Thanks

[@Nevakonaza.]

Wow,Wouldn't expect this to happen on something as costly as a Bose system,They are really expensive. Nice job fixing it. :)

[@12voltvids]

+Nevakonaza - This failed because the dumbass customer had it in behind a couch, and everytime the kids jumped on the couch the power connector was rammed against the wall.

[@Nevakonaza.]

+12voltvids ah that explains everything,really enjoying your channel though,looking forward to your next upload..still got a ton I need to watch. :)

[@MrTopsoil911]

+12voltvids only thing i liked about bose was the 901's

[@130rabarth]

hello I would like to know the electrical characteristics of the power supply, how many volts in output .... thanks Rocco.

[@joydeeproychoudhury8964]

Hi I have a bose Subwoofer ps II 28 LED glows but amp doesn't emit any sound. Do you think you can help

[@prabn6985]

What TVs diode is it. Mine is blown

[@kofikwakyeagyekum6487]

Hi I don't have the deck, how can I utilize the Subwoofer and its inbuilt amplifier??

[@Jjomz99]

I see this is a very old video, but i have the exact same problem with my bose 321. The only difference is that there is no damage to my traces and it looks like the solder melted off of the connection. I dont have much knowledge of electronics but i do own a soldering iron. My question is should i be worried about that huge black capacitor if im just going to put a little solder on that pin from the power plugin? I dont want to die trying to get this thing working again.

[@12voltvids]

The capacitor is not going to hold a charge after it is unplugged. This warning was valid with old vacuum tube equipment where the capacitors could hold a charge for a period of time but with solid state there is always a load present that will discharge. The only exception. Is swit Jing power supplies if the oscillator is not running as if not then the chopper transistors are not running and the main filter can retain a charge. If the oscillator is running however that will discharge the main filter in a few seconds. If in doubt short a screwdriver between the pins of the capacitor to discharge if it is holding any energy.

[@Jjomz99]

@@12voltvids ok so I should be safe. The capacitor pins are not accessible from the top off the board since there seems to be glue sealing the capacitor to the top side. Could I discharge it by bridging a screwdriver to the pins that protrude through the bottom of the board? Would that be effective? Also is that large black capacitor a 350v or did I decipher the code on it wrong? Thank you for the feedback by the way

[@12voltvids]

When it's unplugged it's going to discharge anyway but yes you can do it from the bottom side just short the pins.

[@Jjomz99]

@@12voltvids thank you sir

[@Dillisive]

What is that buzzing sound starting at 1:12

[@hectorcg8702]

Can you tell me wich is the value of vcd after the rectifier?

[@LuisArielViolla]

hello! how are you? The post is kind of old but I ask you in case you have any memories. I have one that was connected to 220VAC and it is at 110VAC and it burns a fuse and varistor. I also changed the IRZ44N but the BOSE 321 is not heard. Observing with details I saw that the R10 was overheated. I also replaced it but it burned right away. Do you have any idea what it could be? Thank you so much!

[@12voltvids]

Have no idea. Perhaps you burned the transformer out. Put 240 into a 120 designed device and bad things are bound to happen.

[@elizabethsanchez3995]

I have the same problem on my bose and i have a cuestion what kind of wire do you use for fixing yours can you tell me please

[@12voltvids]

I just used some bare copper wire. Stripped the insulation from a piece of telephone wire. (cat5)

[@jasonbulluck]

Following my other comment I tried this and nothing is visibly burnt. Currently attempting to take apart the unit.

[@MrTopsoil911]

you look like colonel sanders of electronics. great vid again

[@markmarkofkane8167]

I thought Bose and Klipse were top of the line speakers one time? What happened? How's the bass on that Bose? Kingpin? Woody Harrelson? Good movie I think.

[@12voltvids]

Bose do make some nice speakers. Both my cars have bose systems in them, and I have had no temptation to change them because the factory system sounds great.

[@donald1056]

Badly burned - but kind of a simple fix - and it works !!!

[@12voltvids]

+Donald Ellett More than likely because the owner shoved it up against the wall and stressed the connector.

[@Ramdileo_sys]

@@12voltvids someday you will have to disassemble and work in the transformer/ballast of that lamp to fix that humming .. maybe it is not the transformer/ballast core........ maybe it is just a loose screw or a loose piece of can in the lamp chassis what it makes that humming .......... if it is the transformer core.. well tighten the screws in the corners or put some metal brackets in between those screws.... so they squeeze evenly the entire outer surface of the core... is what you usually see in amplifiers transformers ..... ....... Another "mexican" or actually Argentinian solution i know...... is to immerse a quarter of the transformer in light half diluted wood varnish...... wait a couple of minutes... let it filter in between the core sheets..(if you have a Pressure Pot/Vacuum Chamber to force the varnish to filter in.. even better)..... submerge it a bit more... let it filter..... and so on until it is all submerged... leave it for a couple of hours... take it out... and let it drain/dry for a couple of days... the varnish will get between the vibrating blades.. sealing them or acting as a shock absorber...... this would also solve it.. if it is the windings the ones that vibrate ... that's why you sometimes see some transformers that are completely varnished.. all its surface even the core and the the windings ....

[@Watcher3223]

"Land of the burritos." That's a good one!

[@BenjaminEsposti]

Wow, they should have recalled those by now!

[@AaronBilger]

Na nobody does that anymore

[@12voltvids]

If a unit caused a fire, you bet they would recall it, but if it just sparked a bit and went out not a chance.PCboards these days are fire resistant, so the chances of a fire resulting is quite low. This did happen to Zenith back in the 80's. Several house fires and a few deaths and they ended up recalling many system 3 TVs to have the horizontal sweep module replaced with an improved version. The difference? The new version had a fireproof shock shield. The original ones had a piece of what looked like cardboard covering the bottom of the board to protect a technician should his hand go where it shouldn't, around the pins of the flyback, linearity coil ect. The problem was the linearity coil had a solder connection problem, and if it let go it drew a good size arc around it, which in a few cases ignited the shield and caused a fire. I believe there were 5 fires caused and then there was a recall issued. Everyone was told not to watch the TV until the set was serviced. I forget how many horizontal modules I swapped but it was several hundred in a short period of time. All the defects were returned to the factory for examination, repair, and re-issue for more sets. Only difference I could see was a shield made out of fire retardant plastic and the connections around the horizontal linearity coil, yoke plug, and flyback were all beefed up.

[@infinitecanadian]

@@AaronBilger Except for food. They did a whole bunch of recalls in the food industry as of late.

[@renemachado4032]

GREAT JOB, THANKS, IM FIXED MY UNIT SAME, WORK GOOD

[@ivanshinoda]

I have this exact model, but the subwoofer hums when plugged to electricity, opened and saw a few solder joints broken, re solder them but the hum is still there, also checked the capacitor but looks good.

[@hectorcg8702]

How many volts you have in capacitor?

[@513769]

Did you fixed? Same problem here...

[@ivanshinoda]

@@513769 Nop, I moved the subwoofer behind a furniture where I can't hear it.

[@chrisraisner8202]

When I plug in my 321 the display says Bose 321 and that's it can't power up,anyone have a thought

[@erwinribas]

Hi. Were you able to fix your bose?

[@ivanshinoda]

Actually here in México we build top quality electronics but, Bose did not want to pay well. Wanted to go cheap. The quality costs. Nevertheless, nice video.

[@12voltvids]

The early stuff when RCA and zenith started making stuff there was horrible but I lived it because it made me millions fixing it. Fixing electronics bought me a house that today is worth well over a million dollars.

[@ivanshinoda]

@@12voltvids Wow, hard to believe but that's amazing.

[@HDXFH]

Wall of voodoo sung it, love that song

[@reginaldwilliams908]

Hey i have a 321 system series 3 and it stop powering on also and i hooked up my 321 series 1 receiver to the series 3 wire's and it came on

[@robertomacias2202]

Thats not a manufacturing issue, thats a design issue.

[@pauldionne2884]

Exactly. The connector left the factory properly soldered as designed. Bose should have used a different connector or reinforced the PCB expecting it would be flexed when the cable is inserted or bumped.

[@parkercooper7021]

I have the ps321 II it comes on but immediately shuts off

[@juliuskwabenakarikari5509]

Did you get any solution? I'm having same problem

[@drx7599]

The amp in the sub is for the sub only as the speaker is 1,2 ohm..then the sub power the main unit, inside there are the amps for the speakers..Mexican radio Celtic Frost😂

[@dave631bnetzero]

He he, ya! these are NOT WORTH $1000. I worked for Bose for about 25 years. Engineered in the US, IMPORTANT "Assembled in Mexico. PC boards are made in SC or CHINA!!! Speakers (Woofers and tweeters) made in Mexico. Power output is about 150 watts RMS, but into very low resistance speakers. Sounds like 500 watts. Very very loud, and very very clear sound. The first 3-2-1 systems are very defective. Ask me why and I will tell the story of the first Bose DVD players. BAD SYSTEM, stay away. 12voltvids, very good video! I enjoyed this a lot. You are right! That cable has been in contact with a wall or other hard surface.

[@12voltvids]

You are right they are not WORTH that kind of money, but that is what retailers are selling them for! I worked in retail for over 20 years. We sold those units and others. They can claim whatever power they want, as there are many ways to measure it, but only 1 is the correct way, and that is true RMS. Not program power, or IPP which measures 1 cycle on a single channel. That power supply can't put out enough power to drive it to 150 watts. The power I quoted is the rating of the amplifier into low impedance. I wouldn't own any of those products myself. Right now I am using a 30+ year old Luxman LV103 (overhauled in another video on the channel) as my power amp in my studio. It has a pair of original 30+ year old triode tubes in it that give it a nice warm sound. My amp is a real made in Japan unit. You don't see that anymore.

[@haraldfeichtl5191]

David Rousseau hi, guess you know a lot about bose 321 series I , please maybe you can answer this question: since a few months mine turned off after about 10 - 20 minutes, now it does never start, the display is shinin but no more bose 321 sign, but it makes some noise like it wants to start but does not work.. maybe the 24pin connection ? because it looks like corroded.. hope you have any idea , kind reg harald

[@TannerTech]

I just fixed the exact same unit that has the exact same problem!

[@danushkaudaya4216]

Hello dr sir i have one qustins

[@jasejj]

Man you guys don't know you're born in the US/Canada... In Europe, we started off with stuff made in Britain or Germany... all good stuff... Japanese and Korean... yeah no problems with that either... even the 1990s gear made in Poland and Hungary was spot on really... then we got the Turkish crap... oh dear. In fairness it's a lot better than it was, but the early stuff was terrible! I've not seen much Mexican gear, only Cisco network gear which is really well made, but then it wants to be at $30,000 or more really :-)

[@12voltvids]

+Jason james Ok over here on this side of the pond we used to see Canadian and USA made gear that was very good quality. The US plants mostly moved to Mexico, and that would have been RCA and Zenith of the day. The Japanese stuff was also very good, and the early Korean stuff was fairly close in quality. Most of the Japanese and Korean TV manufactures moved their plants to Mexico, and there was a drop in quality. For computer parts Taiwan has been good. Some stuff made in China has been OK, and other stuff terrible. I have a few things made in Vietnam, and they were cheaply made. A scanner that only scanned about 50 photos before crapping out. There is stuff still made in Canada/USA and it is very good, but it is also expensive. I have some Canadian made Blackberry phones, boards made in Canada, assembled in Mexico, and they have the best build quality I have seen in a cell phone. My daughter just got the new Android Blackberry Priv, Canadian made, assembled in Mexico, build quality first rate. Mind you she bought hers direct (not through a carrier) and paid a small fortune for it. For what it cost it better be built well.

[@crashbandicoot4everr]

Jason james "Turkish crap". You are talking about the Vestel and Beko CRT chassis aren't you? :D

[@hannonm]

I Would have done this repair differently Cleaned up scraped solder mask. and flowed Solder from the exposed trace onto the pin

[@12voltvids]

+Amy Marie The way I did it guarantees that it will not be back for a stress fracture due to the owner ramming the unit in to the wall again.

[@hannonm]

okay, I dig.Just wanted to throw that out there Tho. In case ya come across something like that again. :)

[@12voltvids]

+Amy Marie I used to cheat" and just scrape back the burnt portion and stick a big blob of solder on the pin, as you described, but my experience has shown me that these type of connections are the weak point in the first place, so adding some reinforcement is the way to go. The wire leads ad some flex when the power cord is inserted and removed. Most well manufactured products will have 2 wires attached to the power plug and those wires soldered to the board for stress relief. Power connectors attached in this manner is a constant source of problems. When I was working in a warranty depot we would mod common failure connections just like I did on this one to prevent repeat failures. For a paying customer, which this was I want to make sure it isn't turning into a boomerang.

[@cubanman2009]

5:10 damn really you had to say that nice choice of words

[@cektormora7866]

that's wy they make them in mexico cuz if they aks this guy to build it its goin to be a bunch of crap a least should to clean that sheet before soldering man !! mexico has very good cuality, many of your freakin good apliances and electrical stuff like SCUARE D its made in Mexico including DEWALT etc etc etc jaja

[@NunYa953]

You're an idiot.

[@keithcitizen4855]

another nice video

[@Synthematix]

You know what BOSE stands for right? Biggest Overrated Shit Ever, but the way youve soldered that,if the solder breaks it will short out to the other terminal, id have used heatshrink.

[@12voltvids]

This piece was made in Mexico. The radio unit was made in USA, and there is no comparison between the 2. BTW my solder connection will never break, it is tacked down in multiple places, and I got enough heat on it to ensure than it will never fail.

[@westonhungu3819]

Are you in Dallas?please can you fix mine for a price please?

[@12voltvids]

Actually I am in Canada.

[@geojor]

thanks for sharing...

[@twiff3rino28]

"ASS-embled" 🤣

[@AaronBilger]

Bose is overpriced I buy good stuff but when it comes to av receivers I buy em used of of ebay usually Yamaha and use them as a preamp since preamps are so expensive.

[@12voltvids]

I used to think the same, that Bose was overpriced, but looking at the build quality I can't find fault in the US built components. This subwoofer portion was made in Mexico, but the DVD player side was US built and was beautiful.I have a Bose system in my car, and it sounds fantastic,

[@rubenserda5529]

I enjoy your videos every morning with breakfast. I picked up a PS3-2-1 sub yesterday for $10 and today I plan to kill it after I figure out a way to use it without the BOSE headunit. Anybody have a pin-out chart on that 15 pin connector before I start trouble shootin?

[@alwaysopen7970]

I am going to smash a POS wave system tomorrow.

[@12voltvids]

Kewl

[@infinitecanadian]

Ah yes: at least it is made in North America!

[@Bolivar-z7g]

Whenever you make a comment make sure you do some research on the matter that you are mentioning,you said the keyword, & the keyword is assembly mexicans don't make the parts they only put it together & yes I'm Mexican but that's not why I'm saying this.

[@12voltvids]

You're right they didn't make the parts they put the parts on the board and didn't solder them correctly so they failed. Every company that moved assembly to Mexico had an immediate drop in reliability and 99% traces to shoddy soldering. Zenith, Sony, RCA, lg, and Samsung. The Korean made Samsung tvs are all still going strong. The Mexican assembled units not so much. Same with lg.

[@hydrolisk1792]

Hahaha, I love your videos mate!!

[@oportadiaz]

Very helpful video but you should stop running your mouth like that because probably all your clothing is made in Mexico too! Oh! and by the way, it looks like you ate a ton of freaking burritos!

[@markmarkofkane8167]

Lol

[@HDXFH]

LED display

[@12voltvids]

That one was lcd

[@marlonsgarage8525]

Hahahahaha the land of the burritos.

[@olradguy]

Blose ,overpriced crap!

[@HDXFH]

A blose lol

[@GTI1dasOriginal]

prutser