Marantz SR8000 No Sound No Display. Can we fix this one?

[@peterzinn9070]

You found the fault quickly. Personally a good blow cleaning and wiping getting all the years of dirt and dust off the printed circuit boards etc is a good idea. Sometimes dust particles are a bit conductive, and it always looks professional when the inside is spotless and clean like a clean car. That's what I do with repairs.

[@yuritovbin8953]

He uses the fool-proof logic of a detective, he eliminates what is obviously impossible and is ultimately left with the right solution. Bravo.

[@int53185]

Your diagnostic skills amaze me. I would have gotten frustrated and binned the thing.

[@12voltvids]

Smoke is one of the most amazing diagnostic techniques.

[@THOMMGB]

I wish I could learn more on how to troubleshoot down to a component level. Thanks to videos like this, I am learning. Regards, Tom

[@nemesisnowviii4111]

He measured all the output supply voltages which was good. He took two resistors in parallel and a diode from a used device. Better would be to get correct components as listed. But it was informative.

[@garyalden4289]

you probably dont give a damn but does any of you know a way to get back into an Instagram account?? I was dumb lost the password. I would appreciate any tricks you can give me.

[@richardduke392]

@Gary Alden Instablaster :)

[@garyalden4289]

@Richard Duke i really appreciate your reply. I found the site on google and Im waiting for the hacking stuff atm. Takes a while so I will reply here later when my account password hopefully is recovered.

[@garyalden4289]

@Richard Duke it worked and I now got access to my account again. Im so happy! Thank you so much, you saved my ass :D

[@ZEROSTATIC72]

Nice cats and diagnostics, thanks for the videos. I would have replaced all the diodes in that bridge with new ones while I was at it. When one goes short I am always concerned the others aren't far off going as well.

[@patrickjmorgan]

Great you have the time to introduce the helpers. My one sits on a cushion when it suits him behind my workbench.

[@markmarkofkane8167]

It still looks like a beautiful unit. Maybe not the quality of the older models, but it looks good to me. Good Job!!!

[@lyntonprescott3412]

I think it is really great how you get straight to the point without all the 10 minute waffle that our American cousins provide. Also you don’t use the words “like” and “kinda” four times in each sentence, and you also pronounce the ‘l’ in solder. Finally love the cats who to come and help! Lynton

[@mark902]

i'm excited to see what's coming up from your stack. hopefully some nice old sony. i'd love to see you work on one of their old pulse locked power supplies found in many of their late seventies to early eighties gear.

[@Darryl603]

Good job! Follow the heat... or the smoke lol. Looking forward to the next. See ya then

[@davidbell2967]

I would have fixed the power cord. Love the cats! Keep up the good work!

[@12voltvids]

I did, just not on camera.

[@nor4277]

Much as I enjoyed that I like you tube radio stuff a little more,I love when a skilled guy saves old tube radios .I like watching kit assembly's,old tube radio's .maybe because I am a older guy,I do like your videos ,longer the better,good way to learn from a skilled tech.

[@12voltvids]

Love the old tube gear myself. Planning on another tube amp build, a push pull one in the near future. Just waiting for stock to come in.

[@Thujaplicata1]

Thank you so much for inspiring me to get back into electronics repair and troubleshooting. Starting up my little "shop" again. Best regards from ocean park BC. Love your videos. You remind me of my old teacher!

[@swinde]

Has the Marantz name on the front, but the inside looks just like department store junk. I remember the Marantz slide and it wasn't pretty. We used to make fun of Sound Design and Lloyds and this thing looks just like them inside.

[@Truckguy1970]

Yeah, Soundesign was the equivalent of Kraco or pyramid audio equipment for car stereos

[@ciprianwinerElectronicManiac]

I recently received a Marantz tuner that was part of an budget audio component line and it was using the power from the amplifier unit so it didn't have a power supply inside. I've built a power supply to supply 5.5VAC for the filament, 12VDC for electronics and 32v for the VFD display. Turns out that the display driver "IC's" were shorted or at least one of them. I just powered them up using a battery, a spark was made and whohoo the internal short of the IC cleared up. Hooked up the power supply and voilla the tuner works perfectly. It's nothing special but I really love the dotted VFD Display. Nice video. Cheers :)

[@12voltvids]

VFD matrix displays are very nice. About the only ones that beat them were the old single color neon plasma displays. Now find one of those and you are set for a treat. I used to have an Compaq portable computer. Looked like a briefcase and the keyboard flipped down to reveal this neon plasma monochrome display.I think it might even have had windows 95 on it. I picked it up at a ham radio flea market. It was sitting around collecting dust and a friend that zworked in the film industry asked if I wanted to sell it as a prop. I was offered more for it then I paid, so I sold it. Wish I had kept that unit as the screen sure was unique, but at the time I didn't see it that way. I saw it as old technology, and color LCD laptops were so much cooler.

[@ciprianwinerElectronicManiac]

12voltvids Wow neon plasma display's are indeed neat. Well, you know how things go, you never know what you have until you get rid of it or sell it, That's why I try to keep everything I get. I don't like then I keep it for parts, I still don't have a lot of stuff but I'm sure that when I get to much of it then I'll sell it and then regret lol. Take care. Cheers :)

[@12voltvids]

All plasma displays are just cool. High voltage devices.Why do you think I keep that old 480p plasma on my bench as my TV to watch. Its only standard definition, but it still looks great in the shop. LCD are boring by comparison.

[@ciprianwinerElectronicManiac]

12voltvids I always wanted one, maybe if I find one broken to repair then yes, problem is that they take a lot of space, oh well, I guess that I will have to get rid of some CRT TV's lol.

[@antoniomancini1794]

This is absolutely a great channel I enjoy watching stuff like this

[@magazinu1]

I want to thank you for your videos. I like to watch how electronic machines are repaired. I just manage to make from two defective PHILIPS VCR's one functional. I changed the unfunctional mechanism with the good one, and also the video drum from the bad mechanism with the unfunctional video drum from the functional mechanism. After that, I put the mechanism on the more performant VCR circuit table. The two PHILIPS VCRs were slightly different models. One had only SP mode and the other one LP too, and some more menu functions. After that I cleaned the head and other parts, and it was like new. It took me about 2 hours to do that. I was lucky that there was nothing to unsolder and solder. Just ribbon plugs, if that is the correct technical term. Now I can transfer the rest of my VHS tapes to DVD Recorder and then to PC. I also watched the video with your strikes on other channel which "stole" your video. You're right. What you do means very much work and a lot of time. I am a music fan, and have uploaded about 400 music vids with 16:9 aspect ratio and HQ stereo sound. But all songs contain KZbin ID-CONTENT and the complainant gave the right to use its content. I don't like when I want to listen to a song/video and I find bad image and mono sound. That happens with many old romanian videos, which I remastered them. Anyway, maybe my english is not too good, but thanks a lot for your help with your videos. In Romania is very hard to find a person like you to fix old VCRs, DVDs and other old machines which are not manufactured anymore. Greetings from Romania!

[@m.emrahozkaya9903]

I find your work very inspiring and your presentation entertaining as well. I have one recommendation however, please get yourself some duster/vacuum whatever and clean all that dust before the work, I am literally coughing here in front of the screen :)

[@madmanmechanic8847]

No shit thought the same

[@nickfatsis9607]

Nice cat, they're the masters of their own domain!

[@joemartin6439]

Sure like your attitude to tell what is bad really bad

[@antoniogonzalezmedel]

i think all diodes bridge should be reemplaced because posibly the partner diode are near of failure too.. good luck doctor ! great video

[@wadehicks9270]

I got 2 cats that are twins I started buying those blame treats for them now one of my cats will wake me up all hours of the night by slapping me in the face just so she can get those crazy things. Buying those were a big mistake lol I can't be mad at her cause I was the one brought those things in here lol. My sister calls cat treats cat crack and I can see why. Great video as always Sir thanks for taking your time to do them.

[@anonharingenamn]

I just wanna say I really appreciate you making these videos.

[@dmcintosh1967]

even though that Marantz was poorly belt it's way better then a modern day one. I fixed a Magnavox sold state radio in a real wood cabinets with two speakers and was made in 1960s I think because of the sold state badge it needed new filter capacitors . keep the good work.

[@frslas]

All these years I thought my Dad was nuts for kicking the TV when the picture went out.

[@antoniogonzalezmedel]

cold welds can be detected as well

[@curtchase3730]

When I work on this stuff and suspect a short, I drag out my 100 watt light bulb trick. If light goes full brightness when powering up amp, I know w/o blowing up more stuff that there is a full short. I keep troubleshooting until the light goes dim after power up. Anyway, you seem to know what you are doing there.

[@12voltvids]

Yes I have a current limiter bulb. I use it when I suspect a power failure. More on vintage tube gear where you can't afford to burn something up as it may not be available.

[@redrooster1908]

I could watch this stuff all day.

[@DarrellRoper]

I remember this type of stereo's and I don't like IC AMPS. They will distort when you push them. I like MOSFET Push Pull amps. That was an easy fix you done on this unit. Couple of spare parts, no buying of parts. Easy fix.

[@12voltvids]

I am NOT a fan of IC based amps. Never have been. MOSFET output good power and current.Cant beat the sound of a single ended tube amp though. Those are my favorite. Not much power though, but very clean sound. My Mosfet / tube hybrid is my second favorite, followed by MOSFET solid state.STK amps belong in the garbage.

[@DarrellRoper]

Yeah I agree STK IC AMPS are garbage. They cost way too much too. I never dealt with tubes amps but been told they are very good. But I have dealt with home and car high power units. Don't take you long to figure out what sounds good and will hold up.

[@12voltvids]

I have been around long enough to appreciate the tube sound, as that is all we had as I was growing up. In the 70's solid state amps hit the market, and I remember them not sound anywhere as good as the old tube amp I had. I kept that old chassis I pulled out of a console running for years. I still have an old McIntosh from the late 60's, and an Akai 1710W reel to reel with a tube amp on board.I have a cheap Chinese tube amp in my living room that sounds great, and I have built 2 single ended low power amps in the past few months, and they sound the best of all. Tube amps are still readily available today, but they cost serious $ to get into.The 8 watt / channel 6L6 amp I just built runs 1000 as a kit.I just got an older to build one for a guy that would like to do it himself, but doesn't want to risk messing up, so he is going to pay me a couple hundred to build him the same kit that I just featured in a 5 part series on my channel. I hope to pick up the kit tomorrow, and I am going to build it in one sitting. (not filming this one though, as I have already done that, and I figure I can do it in about 3 hours if I work straight through.

[@DarrellRoper]

I grew up in the 70's too. But only tubes I remember was in TV sets. Remember the days where you go to the drugstore and use the tube tester to figure out which tube is bad. LOL. I did that a time or two. All my stereo's growing up was cheap stuff that my parents gave me. Nothing fancy. But after I was making my own money I started to get better quality audio.

[@12voltvids]

Life I go back to the 60s and that was all tube gear. the first stereo I. bought myself was 1980 and it was an ic amp (yuk) in 84 i picked up the luxman hybrid i still have

[@woofervision673]

Enjoyed the video and the random cats. Thanks for sharing, really helpful the way you go through your diagnostics step by step.

[@12voltvids]

Time to do some more troubleshooting videos. Been doing a bunch of turntable videos lately, and getting hammered pretty hard for copyright as I played some music to do a sound check.

[@woofervision673]

12voltvids the copyright rules are a little extreme. You would think they would allow you to apply for a channel exemption at some point since it's pretty apparent with even a cursory look that this channel does not exist to pirate music. Also off topic but do you have any strong opinions about newer (90s up) onkyo stereo receivers specifically the tx 8511 and tx 8522. They seem to be built pretty well for being solidly in the digital junk era. Just picked up a rack mounted tx 8522 off ebay.

[@12voltvids]

I hear you. I normally use royalty free music in my videos, and they get claims all the time by fraudsters but these are easily resolvable as I have the license to use it.Recently though I was doing some turntable comparison videos, showing the difference that things like the type of preamp makes in the sound, so I used commercial music, and this of course draws a claim, which means all advertising revenue goes to the artist.Onkyo used to build some good stuff until the late 2000s when all the DSP stuff hit the market. Then it went to junk, like everything else.

[@woofervision673]

12voltvids that is pretty disappointing how it discriminates against vinyl. This kind of footage is important for future generations of tinkerers.

[@12voltvids]

Yes but at the same time the artist that creates the work deserves to get paid. I have friends in the music industry so I know how it works. It is no different than film and video work. I had one of my commercial productions stolen by another company, and they released it and profited from it for over 10 years until totally by accident I saw it, complete with another production companies name on it. I fled a take down notice, and backed it up with my time coded original camera footage and youtube took the video down.

[@Synthematix]

That buzzing sound is therapeutic.

[@rodantkapoor9721]

Beautiful kitties and informative video, thanks for posting!

[@tough213]

Great video as always your cats are adorable wishing you a very happy and healthy holiday season and all the best

[@redemptusrenatus5336]

Always a pleasure watching and learning. Thanks for taking the time to record your knowledge and expertise and share it with us. I know it takes time just for the camera setup, recording, and editing let alone for the actual electronics work. It is much appreciated. Looking forward to more audio gear repairs.

[@12voltvids]

I had a good time responding to that viewer that admitted to using an ad blocker, said he didn't want to burden me, and would no longer watch because of it. Considering that I didn't earn 1 cent from someone using an ad blocker, does he really think I care if he watches or not. Those people are called leachers.

[@redemptusrenatus5336]

There's always at least one goofball that has to make some comment like that. Or another of my favorites is someone whines about something they don't like about how the content creator is doing things, and that because of it, they won't be subscribing anymore. What's the point in even commenting? To get the last word in somehow? I generally figure if you don't like what's on, change the channel. Someone else in the comments asked if there was an online training course for this kind of stuff and I got to thinking I really wish you had classes people could take. You do a great job explaining things. Off to watch the 2230 video that finished processing :) Take it easy, and don't let the leachers ruffle your feathers.

[@frankpitochelli6786]

Once you have an open resistor, it's almost a 90 percent chance of a shorted output or a rectifier... I've batted my brains on many of those older models, to the point that it became economically unfeasible to repair.!! You're right, that genre of amplifiers were the start of the crap genres of the consumer electronics bizz. Good job tho.!!

[@rickmelin4926]

I love your channel i have a pioneer sx737 i got for 20.00 some years ago it works great and is it heavy! I was surprised to find out it's just 35 watts per channel. I recently got a pair of onkyo a/v three way speaker's for 25.00 and it all sounds great. I will have this setup till i die.

[@rickmelin4926]

@Timbo Lei Yeah i love this pioneer i have had marantz and kenwood over the years i thought this one was more powerful but it seems to like these onkyo 3 ways i turn it up a hair and i got to give this broad upstairs a little bit of her own medicine ill make her think a 747 landed on her ceiling. HaHa!

[@rickmelin4926]

@Timbo Lei Agreed, that friend i got the pioneer from has a huge 70's sansui i wanted to buy but he wasn't selling i wonder why. Awhile back he wanted to buy back the pioneer i kindly thanked him and said no. If he keeps goin with the credit card debt i might get it. He's a good friend and i don't want to see him get in trouble so i don't care about getting a great deal on it if ever. All the sansui's in the world don't amount to a hill of beans good friends are more hard to come buy. I think i'll ask him to bring it over just to see how it sounds. I got to call him to get the model to check it's specs out.

[@rickmelin4926]

@Timbo Lei my pioneer is hella heavy ill have to get my bath scale out but then I'll have to weigh myself get depressed have some more chocolate. HaHa!!!

[@johnrobinson357]

Everybody knows that Cats are masters at diagnosis and repair....right ? Mine think they are anyway. Once a cover comes off they both start sniffing and pawing at the insides - gently but constantly. A learned behavior, ever since i was given an old Hammarlund general coverage reciever - HQ 180 A. Mouse nest inside was found by them both. Rodent figured it was eviction time and ran for it. Made it maybe ten feet, it then became a two cat hockey game for an hour. Sometime later it became a kitty snack. The Hammarlund worked like new - re capped, aligned, solid stated the power supplies, a nice unit. Still use it all the time, all i had to do was clean a few dirty pots.

[@dougmcartin3881]

They really did some mechanical gymnastics with those switch arrangements. You would think that design would be much more costly than if they had thought out the layout a little better in the first place.

[@pauldionne2884]

Love your vids! Thought is was funny after rant about lack of discreet components then having to replace a resistor & diode!

[@coojoezak]

Thanks you, amaizing video. I like when you repair amps/receivers. Please more video like this :)

[@jdrs4214]

A Marantz receiver with a transaxle type tuner dial with U-joints. Just like the rear wheel drive transaxle on my 1999 Ford Ranger connecting the dif to the trans. How cool is that??!!

[@12voltvids]

That's called an engineering goof up. Someone didn't measure before designing the thing.

[@ciprianwinerElectronicManiac]

Lol, I was just preparing to test the DBX on my tape deck with a Sony HF 60 tape when I see one exactly like that in your video. Nice :)

[@electriciants7927]

When you found the shorted diode, what position was the meter on? Was it in diode check or continuity?

[@xerejuneseve6333]

Kids don't do this at home.Perfect repair job !.Sound not so bad.

[@ukaszkrupicz568]

Next 2230 please, good work again.

[@12voltvids]

I actually uploaded that one first, and it appears to be stuck processing.

[@expiridionrodriguez8618]

My Marantz SR8000 5.1 Channel 105 Watt Surround Home Theater Receiver is on but don't have sound. Can you tell me what is wrong?

[@davidemessinese1262]

Hi, nice and useful video. I have a problem with my SR8010DC. I repaired the P860 card and now I can see the display, but there are some segment off and there is no possibility to change frequency. Do you know what could be the problem?? Thanks you, sir.

[@rayhindle642]

"Catch you in the next one".................you certainly will, I really enjoy all of your video's , you make repairing electronics look all so easy, it must come naturally to you.........( After years of night school and years of on the job training of course )......., I am so thankful you record and allow us all to sit in and participate. You said in one video that you left electronic repairs to work in another field, may I ask which field you worked in?............ if I'm not being too personal. Ray H. From the U.K.

[@12voltvids]

I work for a major telecom company on Canada. Work mostly on sigh speed internet and IPTV services delivered over DSL . BDL and GPON technologies.I still run a video production and archive company as well. That's why there hasn't been any new videos for a few days, as I have a huge video archive order I have been working on every day so I haven't had time to get back on anything, but there will be new videos coming out real soon.

[@rayhindle642]

Thank you for your reply.........Ray.

[@marcdich9066]

Interesting I had the same receiver the same exact model with the same exact problem I had to replace a fusible resistor in a diode it was a couple years ago and that’s what fix the problem seems like to me and I could be wrong that 8000 seem to have the same common problem but it was one of the smaller diet is it one of the 6 AM diode’s on the main power supply so we are working at is the ones I end up replacing

[@thelibrary8604]

My denon 1603 prologic and 5 channel not working. But stereo and external working. Can you please help where is the problem

[@Gljin40509]

I always thought one couldn`t do better than Marantz..this video,and a Marantz Pro Cassette deck I bought a couple of years ago changed my mind....Marantz Pro is now a house brand of a company called "In Music" which sells the same cassette deck under numerous brands including Ion and even Denon...It`s a shame companies are allowed to do this in today`s world and we ,the customers have to learn it the hard way....the Marantz deck had so much hum as to render it unusable...

[@12voltvids]

This has happened to many brands. The company goes broke and gets bought up by someone else just to get the name so they don't buy the company to continue manufacturing quality products all they want is the brand name and then they go and they find another manufacturer and slap their name on it marantz is one, example. Fisher was another when they were bought by sanyo in the early 80s. Even some companies that are still around don't make their own products anymore and instead by cheap stuff made in China or Vietnam or India and put their name on it. Modern stuff you get today is not built to last and most cannot even be repaired because there are no parts and there's no service information available.

[@johnbateman4255]

Have you ever worked on Hitachi HA 7700 amplifiers? I have one in need of restoration and repair and wondered what you thought of them.

[@vintagestereobuff7005]

You're the Fonzie of Marantz receivers. Smack it to make it work right. Like this video, and the cat. My cat sometimes helps me too.

[@12voltvids]

First rule of servicing, give it a whack. It is starts working then you have just given yourself a big clue. Bad connection somewhere. First thing we would do at the shop is start raping boards and see if the symptom occurred or cleared. That rules out bad solder or a loose plug.

[@vintagestereobuff7005]

That's what I do too.

[@robertkeefer7791]

Check out the movie "No Time for Sergeants". Made it 1958 starring Andy Griffith as Will Stockdale. In one scene he is trying to get a tube radio to work. He spits on it and gives it a good whack. It comes back to life!

[@jamescorvett]

i love my late 60's Marantz receiver, 6 tubes driving it. I almost gutted it to use the power amp section to build an amp but i didnt TG. lol

[@12voltvids]

I have a McIntosh MAC 1500 receiver that was my late fathers. I have the manual for it, and will be doing a full on restore on it one of these days. It has 15 tubes in it, and unfortunately the output tubes 7591 are no longer available, however it can be modified to use a different tube. Mine has the original tubes in it, and I haven't used it in several years as I don't want to burn the tubes out. The MAC1500 go on Ebay for about 4 grand these days. I don't know date of manufacture, but my dad bought it in 69 if I remember correctly.

[@jamescorvett]

i'll keep an eye out for the MAC 1500 restore! Pretty sure my Marantz still has the the original tubes. Someone gave it to me in 96-97 when my Technics receiver blow the transformer. Got it rewound,and they wound it backwards. lol 6 months later i finally got it back working so i stopped using the Marantz to preserve it. Its massive, not sure on the model # but it drove my speakers way louder than the 85" Technics receiver. Only thing i had to do to the Marantz was clean all the pots as they were dirty. I was told it would out last me because they were built so good. We'll see lol

[@12voltvids]

There is no question that the old stuff was built to last, and if looked after will probably outlast the owner. Tubes eventually do degrade with use, but if they are not being used will last pretty much indefinately unless the vacuum fails. The big killer of tubes is loss of negative bias which will cause the tube to go into full conduction and destroy the tube, and possibly the output transformer. The old solid state gear from the 70 and early to mid 80s was also excellent. There is still excellent modern gear, but you need to turn to the boutique manufactures and you will pay for it, or you can build your own. The ELEkit TU8200 tube amp I built last year is the best sounding amplifier I have, and my vintage Luxman LV103 is a close second. The Luxman has more power and punch, but the home built one is smoother.

[@scottferguson1932]

I think this is a beautifully styled receiver, but my heart fell when I saw the spring-loaded speaker terminals. Was there ANY component possessing spring terminals that was worth a squirt?

[@pvb9964]

yes, many

[@Popart-xh2fd]

20:25 Wrapped wires instead of ribbon ones... The electronics these days is much more clean and practical!

[@brig.4398]

I asked Dr.Cassette about quality, he said companies started making high wattage expensive receivers, I guess they wanted us to believe the 400 watt Sansui was better than the 300 watt Pioneer. Well they were very expensive so then the manufacturers decided to come out with cheaper versions and that's when the quality went downhill. Sansui for example came out with cheap amps back in the 1980's using STK's.

[@12voltvids]

It was the rise of the big box discounters that drove down prices.Just move the factory to Cambodia, or Vietnam. That will drop the price for sure.

[@juanacarela2150]

why did you not change all 4 diodes? what caused diode to short out was it the resistor that caused the short? if so you did a great job.

[@12voltvids]

Juana Carela the diode shorted and took out the resistor. no need to change them all. they do not have a life expectancy. unlike a light bulb, vacuum tube or electrolytic capacitor which are only good for so many hours, solid state components will run until they fail. they could run indefinitely. usually what causes them to fail is a flaw in manufacturing or an overload from something like a power spike. the other 3 could last another 20 years. no need to change them just for the sake of changing. if it was a mission critical application such as life support equipment that is a different story. but it isn't. it is a consumer amplifier. if the client wanted to pay for parts that might fail down the road then I would change them but most people want things fixed as cheap as possible. so that is what I do. change only the bad parts.

[@studiodhruv1815]

Hi Can you please tell me the equivalent transistors of B1254 (2SA1263), D1894 (2SC3180). its really hard to find to me..

[@davidgriffin79]

That music was good. A quick Shazam revealed the artist as Kevin Eubanks; new artist discovered, yet more good music to listen to.

[@oneil203]

hey I have the sharp aquos lc37d43u tv it's not coming on... the power and opc light is blinking in a pattern, it blinks 1 power and opc together and 1 power and so it continue on an on help please! ...... i try pressing the volume down and input while plugging in the television it keeps on blinking the same pattern i try volume up with channel down with input and power and the power led turns solid green and that's it any solution ?????????

[@adielawson7179]

Looks like you know your shit pretty good. The power cord was actually a pretty good repair. I seen one replaced using just masking tape and no wire nuts.

[@Mentorcase]

Did you really send it off with that shonky power lead?

[@12voltvids]

I sure did! Wanted to make sure that the owner got his hair curled at 60 curls per inch!(The power cord was replaced off camera)

[@Mentorcase]

Oh OK.

[@tharkthax3960]

'shonky' is an awesome word!

[@Si1983h]

The original power cord is terrible enough, it looks like cheapo speaker cable and has no place carrying mains... but to see it extended with those dodgy wire nuts is shocking (no pun intended).

[@inomontoya3901]

I have couple of amp to repair , what website you go to for schematic or service manual. Thank you.

[@mumbles552]

92.9 FM? Must be in the Seattle-Vancouver area!

[@12voltvids]

That would be KISM. I actually got a tour through that station back in the 80's when they were one of the first automated stations in the region. Got some video of it. It is up on the channel here.Vancouver area is close.

[@jasonhawkins4528]

nice work sir is there a training course online to recommend in learning this please many thanks

[@blueribb99]

I would have used alligator jumper leads to connect another 10 ohm resistor before soldering it in. Otherwise, great repair video.

[@hudsonrobert49]

have you ever repaired a Goodmans module 90

[@angelozuna7875]

I have a Yamaha natural-sound RX-V775, that in a power blackout I lost son to the main speakers. I have sound on zone two, I have video on the HDMI‘s, it switches to the sound modes. I have no sound through the main speakers.! I was wondering if you can shed some light on what’s going on, if it’s a really or a resistor, and the general location, before I start to terret down. Maybe a side that I can download the manual schematic. I’ve done thousands of computers never a stereo.

[@angelozuna7875]

Sound

[@Mikeywil0003]

Wow, I didnt know that Marantz had 2 models that are both called the SR8000. There is a new Dolby Digital receiver that has the same model number. At least it isnt one of those, they are a pain to service. They have tons of board to board interconnects that are a pain in the ass.

[@rickmelin4926]

what did you call those wire nuts? Must be a Canadian thing.

[@VintageElectronicsGeek]

For broadcast band, I find anymore to just use AM and select talk radio, spanish or other....K9's are a great choice...for multiple reasons...mainly they won't jump up on your workbench, however, they may eat it! The electrical nut job on the mains was amazing, must not have been a pro, everybody knows one must use clear, masking or at least duct tape or in any combination....I'm surprised you didn't find their butter knife screwdriver left inside!

[@12voltvids]

Actually the guy that owned it got it from an estate sale, and it had been hardwired directly to an electrical box, so the cord had been cut.Don't talk to me about dogs eating stuff. My sister has a few, and they are so incredibly stupid.Her old dog ate a swim suit. Vet bill $4,500.00Just 2 months ago her other dog swallowed a rock, vet bill for that one $4,000.00. And I thought my recent 1,100.00 vet bill was bad.

[@VintageElectronicsGeek]

Why in the world anybody do such a stupid and unsafe thing as that! Vet bills are stupidly expensive and they want there money upfront before they save your animal's life, I too have gone through that a few times with my senior dogs (RIP), I paid it of course but crazy!

[@rahimkvayath]

you are skilled in troubleshooting, but why not you solder the resistors to pcb track? for good looking

[@12voltvids]

Who cares what it looks like, this is not an art project. Nobody is looking inside.

[@ashwinrock5135]

Sounds can be repaired but display ????

[@aamirhussain000002]

Nice video, dear Sir, I want to know about spray you used for cleaning , can I use WD40 in replace of it? Or alcohol, petrol, or...?

[@carlosmenendez8720]

IMO WD-40 is probably not a good idea. It will leave a heavy residue and I don't know if it's corrosive in the long run. Alcohol is only temporary and it has to be 100 pure, no water to leave behind for obvious reasons. Deoxit is expensive stuff, but the best

[@socksumi]

"Start of the slide" is a good term for it. This was from the 1980s, a huge turning point for Japanese stereo makers. 1980s products were largely of much flimsier quality, laced with ICs, cheap as dirt controls and circuit boards and barely adequate power supplies. For a given power output they weighed about half as much as their mid 70s brethren. Design was all about miniaturization and cost cutting. Typically sound quality of 80s gear was shrink wrapped, bland and edgy sounding. This Marantz is typical of that "malaise" era in audio.

[@richardcote9663]

Cleaning the controls> How long does that really last after cleaning before they start to fail again?

[@12voltvids]

It lasts years if done correctly. B

[@AL197845w34832479823]

Hei I love your videos.What kind of camera do you use to shoot?thanks keep up the good work

[@12voltvids]

I used a Sony FDR AX100 for this one.

[@JohanLaujojo]

what best temperature solder for working with this vintage pcb ?

[@12voltvids]

I use 700F

[@JohanLaujojo]

@@12voltvids i use regular 40 watt goot kx40 , but this watt often cause contact pad to lift up from sansui amp

[@yusdiy]

Good work sir! I have a question.Does airing radio station infringe copyrights too?

[@12voltvids]

If music is kept to less than 10 seconds no, and commercials generally are not screened for copyright, just music.That is why I am quick to change stations, or shut the sound down before 10 seconds.

[@ceilingfanmusic6597]

Yes it dose

[@marcdich9066]

hey i have the same unit issue is no power but found that the tiny diode that you changed in that unit - on mine is corroded on one end , also funny that u have a 92.9 radio station were you live ,we have one also which makes me wonder if your close to me?

[@12voltvids]

Depends. 92.9 here is Bellingham Washington. I actually did a video in the studio back in the 80s

[@maxfactor4209]

I have OnkyoTX-RZ900 receiver. what do you reckon about Onkyo products

[@12voltvids]

Many onkyo receivers had bad DSP chips. I have done a few videos on them.

[@MultiJennifer54]

12voltsvids, are you still at it? fixing and showing vids?

[@12voltvids]

Did 4 today. Have 2 more in the can waiting to be edited.

[@nor4277]

I look forward to it

[@PhoticSneezeOne]

I thought beating up my Marantz to get it working is mandatory ?

[@dmcintosh1967]

the next project I'm going to get started on is a Firestone portable tube am radio form 1952 and it can run form batteries and charge the batteries.

[@12voltvids]

I have a couple of tube radios to look at for future projects. They are AM/SW.

[@wklorenz]

Wirenuts unsafe ??

[@MasterNiva]

If you are dissapointed with the marantz quality in that model you better take a look to the newest marantz models.

[@12voltvids]

Oh I am sure I would be impressed..... NOT. Most stuff these days are pretty bad.

[@kevinbeckenham3872]

Cats are always star of the show

[@richardalpert76]

Came for the repair and stayed for the Cats.

[@jdownj]

I know how that goes with running out of parts... I spent all day diagnosing a frequency counter... it would be running now, except for a 1k resistor and a $0.57 comparator chip...

[@zx8401ztv]

Your loverly cat is mad lol, but thats its personality, you would not have it any other way. You got to the bottom of that repair really fast, i did expect you to start singing camp fire songs when that resistor had a burn up :-D, those bead diodes didnt look like the main high current ones, sub supplys. I was thinking 1N4002 or similar, and the main diodes perhaps 1N54xx series, i seem to like the 1N series of diodes, perhaps because they are such an easy part to get. Yes that input switch was odd, strange :-/ i allways liked the old units where the switch was right on top of the sockets, a long metal rod straight to the front, switching at the source :-). When doing diagnostics ive allways gobbed parts on the underside of the pcb, its quick and bodgy, if it behaves then fresh parts are put in place as norm.

[@nrg16108]

Did you ever replace that cut power cord>

[@12voltvids]

It did get replaced after the customer hummed and hawed about it.

[@mistermarcel22]

80s receiver? If so Marantz was in the 80s till de end of the 90s part of Philps and I think that is when they started using cheaper parts.

[@cortessarge5399]

nice one sir..wow..

[@rubber20021]

Thanks for showing!

[@tonymctony4551]

Beautiful cat ! My cats appreciate vintage audio.

[@mikw1809]

You're a good engineer, I sincerely mean that .. but the tap test can often make things worse, before they get better.

[@12voltvids]

Bullshit. If the tap test creates a new fault then that was an area just ready to fail. It located faults fast and that is why every service engineer i have ever worked with used this technique.

[@mikw1809]

@@12voltvids BS? Really? In another of your other videos you said that you did not want to power on a Marantz receiver because you suspected there were dry joints on the power supply regulators. It's quite feasible by banging the equipment, you'll take out additional components as you make and break those connections. You hadn't done a visual inspection at the point where you gave it a couple of whacks, increasing the potential to cause extra work for yourself. I don't mind if you hit your equipment with a hammer, but others might copy your methods and have less skill to fix the faults that they may be creating. You really should be inspecting first and then testing voltages etc .. I mostly find intermittent problems by tracing the schematic, I find it's less work in the end. Do you smack your engine if it's got a misfire?

[@12voltvids]

@@mikw1809 Inspecting won't tell you shit if it is a non visual dry joint. I learned this from broadcast engineers, and how they troubleshot 100,000 broadcast cameras, and broadcast VTR and audio equipment. Taping equipment is a good way to localize the fault. I have never caused another fault doing so. I have been doing this now for close to 40 years how about you?

[@xthesergeantx]

Hi, I love your videos man. I even switched off my ad-blocker, and believe me, that's not something I do that often haha. I do have a question for you. Recently I repaired 2 out of 5 defective LCD monitors by switching over circuit boards and displays until I had a working set. This triggered a thought I had been thinking about before, which is buying "broken" electronics like amplifiers and trying to get them to work again. There's one problem though; I have never soldered anything and I barely know how to read a wiring diagram, basically my knowledge is about zero. I know straight up trying to fix an amplifier would be a step too far for me, but what would you suggest me to train/start with? And also what can I expect in costs for a basic set of equipment to start with?

[@12voltvids]

This is what I do. I generally don't buy them, people give me old units that are disposing of to use as projects, and then I sell them after I fix them. As I have stated in the past I used to make a living running a busy repair shop, but it is just a hobby. As far as equipment, check out local ham radio flea markets. That is a good place to get used test gear that works for very reasonable prices. I have seen good old scopes going for 50.00. That Fluke 12 meter I use cost me 10.00 at a ham flea market, and it works perfectly.Amplifiers can be a challenge some times with discreet components if you have a component that has failed, but many times it is just broken solder and that can be seen with a good visual inspection.

[@ceilingfansandmorecfam2342]

this reseaver is beter then the ones of today

[@12voltvids]

The Leak I was critical on is probably better than most of the units today.

[@12voltvids]

I charged the client 50.00 to repair this unit, however my rates are low.I don't do this for a living these days. I have a full time job in a different industry, so I do these repairs for much less than what a shop would have to charge. Most shops charge 80.00 an hour, and this would generally fall into the 1 hour rate.