I just got my hands on one of these. My aunt was about to throw it away. The solder didn't look as bad as the one you had but I just refreshed it on the exact same parts and it work just fine again! Thanks a lot! :)
My Sony STR-DE845 and I say "Thanks!". Mine weren't nearly this bad, and given I'm a hack with a soldering iron I just reflowed the existing solder. Working perfectly now. :)
Thanks so much. This was exactly what I needed to fix my STR-DE345. It would cut out intermittently and now it’s working solid again after watching this video and resoldering the connections pointed out.
Hi I must say this engineer in my opinion is a very safe and excellent engineer I over the last year or so I have learnt a lot with fixing tv and other bit so please keep uploading your videos as I also enjoy watching them thanks for all your videos and help
Thanks for posting this video. My Sony str de345 was having the same problem. The cracking in the solder joints were not as bad as your unit but after looking with a hand held magnifier I found the cracking. Read soldered and working for now but did notice the base of the circuit board is discoloured perhaps because of excess heat.
Your videos are awesome. Been a subscriber for years, and your knowledge is just incredible. I realize this video is several years old, but these videos never get old.
Great teacher! Man your hard to find!! You should advertise because people like me are looking for you. Great explanations, you probly don't realize how good you are.
This is awesome. Just got this receiver dirt cheap, shows first signs of this error. (Volume will vary/cut out when moving it on the surround channels). I already suspected exactly this issue, and decided to google it up before attempting the fix. Expected a forum post of some sort, but instantly found your vid. Thats why I am subscribed for years already. I don't even need to mention of course the assumption was dead right. Works like new after reflowing with some nice leaded solder. This really is a common issue with older multi channel amps.
Hello. Great videos. Your comments about the thermal stress of components causing problems with solder joints are very apt. The use of lead free solder that you illustrated, provoked the suggestion made many years ago that amps and such like should be left powered on and not switched off. My 22 year old Sony TAF442E is powered on all the time, although it has been switched off a few times. It works fine and has had no issues since I purchased the unit.
When I was in the broadcast industry all the VTRS, cameras, monitors were left powered up all the time. They would turn the beams off on the camera tubes, but leave them up and running all the time except when they were being moved to a location.
Thank you for this video... with it i could solve a problem that i had sinse 1 year ago... the center speaker and the rear left didn´t work... till now.. I resolder those components and.... PROBLEM SOLVED Thank you one more time.. Regards From Portugal
Fast and easy repair! IU have its big brother the Sony STR DE935 bought it new back in the day, however I never hooked it up until about 3 years ago as I had another amp I liked, finally decided I should use it, after all I bought it! Its a great amp, mine is on 24/7 unless I'm going to be gone longer than overnight, then iy gets power down. It has an option to turn the display off, which I do...so as it will prolong the life the display. ~Jack, VEG
You still can buy Kester 60/40, my vintage roll of 1/2 # 60/40 that I bought in the 80's from Rat Shack is still going, will replace it with Kester brand. I use 60/40 for generic use and use Kester 63/37 silver for higher end stuff.
2 of the local suppliers now only have the cheap stuff, but I haven't been into the big shop because I work Saturdays, having Monday off, and that shop is closed Monday.
Hi there, I have the stereo (2 channel) version of this receiver I think (STR-DE185), and my problem is NOT the volume cutting on and off, but the inputs change randomly (From Vid1 to Vid2 to CD, etc, not necessarily in that order). I've pulled the volume board, cleaned it & even replace the screws (it was missing 4 at the volume control). It STILL did it, but not as often. I then noticed when the room was cool, it wouldn't do it, so I removed the heat sink and reapplied Thermal paste (There's only 4 transiters & 2 tiny ones. I've had to do this with PC CPUs many times). It seemed to be cooler, but STILL did it, even less often. I started turning the volume control & it would start switching inputs randomly again, so I opened it up to clean the volume control, but it looked clean, that's when I saw your video. Could the problem be the same as this receiver you have & NOT the volume board at all? I checked the thing you resoldered and it doesn't feel loose, but does wiggle with very little force & only has one, black, thin & about 2 inches long (I don't want to remove the board to check, but the orientation is exactly the same: Heat sink exactly the same, except only 4 transistors, transformer exactly same & placed, board is similar but orientated the same, etc). I inspected all solder points in the volume board & all is good. I'll reassemble it now until you respond.....then if you think it's the same problem, I'll reopen it and remove the main board I guess... Thanks.... Please reply ASAP.....
Great video, gave good confidence to learn from the experts. I have Sony STR DB 870, all the speakers output are distorted. | went through the power transistors (complementary) all ok and the big block white resistor all reading very small ohm and also checked the solders of the components. Underneath the power IC on the board slightly blacked. What else could be the culprit. When I feed it through any channel outcome is same. Also did the headphone check and that is perfect sound. Thanks in advance
If you are looking for 60/40 specifically, The Source and Circuit-test (RP Electronics) still make that chemistry. If you are okay with the newer 63/37, you will be able to get MG or Kester at most local electronics places. If you are looking at bulk orders, I use All-spec for my supplies. The site can be a little bit of a pain to navigate at first, but the search bar is very helpful if you have part numbers.
ive got the DE505 been working for many years until now, intermittant no sound. thanks for video i was thinking maybe a capacitor issue but hopefully an easy fix like you found
sony str de505 fixed, i hope. its working for now, i found a rectifer loose and re soldered it. mine has an removable access panel underneath. thanks for the motivation to fix it.
I have a Sony STR DE-205 (from 1996) on my Computer Desk and use it every day as a real Amplifier for my PC. At the year 2000 i bought a new Sony 5.1 Channel Amp and my Dad uses my STR DE-205 for a long Time. Another few years later i bought a Yamaha RX-V673 to use it mainly for my Home Cinema area. So my Dad bought himself a cheaper Yamaha AV-Receiver too and i get my Sony STR DE-205 back. At this Time it has some weird Audio Output that i fixed really fast: The Speaker-Relay had cold solder joints. I decided to check the whole unit with a magnifying glass for more questionable solder Joints to resolder them as a precaution. But i found only a few solder joints that speaks to me "resolder me". Especially the solder joints of the Driver IC needs a bit fresh solder. I don't understand why these Driver IC's aren't mounted on a heatsink. Now the unit is 24 Years old and works fine. I think there are two things that have saved the Life of this unit: I only hooked up speakers that have matched the allowed values and i never had a reason to turn the Volume up to the maximum. At the half way up it was loud enough. A few years ago i bought one set of spare parts (driver IC and the output Transistors) just in case something went wrong. But so far i never had to replace these parts. With every unit i get to repair i do my routine measurements and checkings. Often the owners connected Incompatible and/or more speakers in parallel, so the impedance was too low for the AMP and i have to rewire the Speakers. Not only one of all my Amplifiers i ever had did blow up, because i always handled them gently and triple checked every connection before i turned them on. I like to watch your Videos. I think it's nice to know that the most malfunctions are still the same and also has the same reason: Operator error.
I have a STR-DB780, which was a bit more complicated to open up. Problem was crackling sound and I could not get any reasonable sound on speech, but other sounds were ridiculously loud. And relays kept on ticking randomly. With your video I knew what to look for, thanks a lot for that! ^_^ Mine was not so bad around the power amps, but those relays were in a pretty bad soldering state. I did solder those P.A.s as well, once I got it opened up. Clearly you're a professional guy on this and IMO you are correct on all other stuff, but one; I think you still CAN get non-RoHS soldering wire ordered! Check out f.e. on the site of DigiKey for that. ;-) Good work, mate!
You can still buy leaded solder from eBay sellers in China! There's a tonne of it still stocked. I bought some more a few months back because mine ran out.
Hey there. I've got an STR-DE475 that has an intermittent sound problem. It appears to be a grounding issue at the pinch terminal for the front speakers. I think the plastic is stripped (small wonder, that) where the screws are meant to thread into them to connect the back plate to the grounding tab. I don't think it's a fault with any of the solder joints. I don't have a magnifying glass, but I traced the circuit with a multimeter pretty far without finding any issues. Whereas, if I just manipulate the plastic terminal, I can restore stereo sound. The problem is that it doesn't last. I suppose the terminal settles back into a position where the signal cuts out. That makes it seem to me that the hot is contacting the ground somehow, and that manipulating the terminal must break that shunt, albeit momentarily. It's pretty frustrating. I've had the unit for 20 years and it did what I needed it to for 16 (just playing stereo and being a radio receiver). But now, it doesn't even do that. So it's been moldering for the past four years, aside from when I take it out to try and fix it.
I really liked this very educational video. Thanks for showing the basics. I belong to an antique radio club. At their swap meets, I've been able to stock up on lots of the old solder at very good prices. I would think that you should also be able to pick up the old solder on E bay. I'm assuming there's no problem soldering on top of the new solder with the old? And, just to let you know, I usually watch your commercials all the way through to the end. Every little bit helps.... Regards, Tom
My sony reciever has no sound. Has white noise and that's it. I think this might be the problem. Didn't find blown capacitors or burnt out ics. Fuses looked good. Soo I'm gonna check the solder now
stk and most other thick film units normally fail at the internal interface between the pins and the thick film unit inside they used aluminium wire or aluminium internal pads and these all used to crack (like the pins go dry jointed on the pcb ) they still do this today .. bosch did it and i think they still do so in most of there automotive parts, and over the years ive had bmws every airflow sensor i have replaced and every abs module has always failed due to this exact same problem
Hello great video, I have a question I have a "Sony Receiver STR-DE898 7.1 Home Theater" and some of the speakers no longer sound, the ones that do not sound I have tried them on other Receivers and they work perfectly that means that the audio outputs Red and Black are damaged I really don't know anything about electronics and I would like to know what are the outputs that I should buy to place it on the Receiver thanks
I still use lead. Another little gift lead free gives is known as `Tin Whiskers'. They can cause shorts and its a big reason you wont see it, as far as I know, in Satellites. Great video.
Tin whiskers happen in leaded solder as well. It was still 60% tin. Spacecraft most likely use gold just like the bond wires in ICs. Cost is no issue in a space craft because once it is launched there is no going up there to fix it. It either works for it's designed mission life of it is a total loss. Some things last much longer than designed mission life. Mars rover for example and voyager spacecraft.
@@12voltvids Yes, but not nearly as bad. Another thing is how lead free looks almost like a cold solder joint. It can add time inspecting a board. I'll take Kester anyday!
I have a 25 year old Technics receiver with a couple of Sanyo STK's in it. Still humming along with very litle maitenance. Must have got a good production run.
If you never crank it up, then many of then were fine. If you crank it up, or it is installed in a cabinet with poor ventilation, or components stacked which cause poor ventilation then bad things happen.
Smashing repair, A bit of a pain in the bum to get to, but it was worth your effort. Someone will love that :-D. And there was no component damage, nice :-D. if the bad connections were in the transistor bias circuits, then it could have been horrible. Ive seen the same thing happen on the ic's mounted on the crt pcb on computer monitors, same thing, hot rgb driver ic's, death to the solder. I do blame some of the failures because of minimal solder, a thin drum of solder around the pin just asking to crack, the black line of death :-(
Yup, too little solder is a problem on these large pins. Correct on blown parts. I have see outputs and the ICs fail when a bias signal is lost under load.
I've dealt with stereos made in the 70's that were made of wood panels glued together with no screws, so you would have to break it open to service it. Frank Frank Reiser Video/Audio Service
Most of those console units I worked on you could remove the chassis from the cabinet and work on it separately. You just had to pull the back, which may have been stapled on to the real wood sides.
If you need a replacement for the 60/40 look at this link from Germany: www.elv.de/felder-nige-loetdraht-100-g-spule-1-0-mm.html . It is Ni/Ge Solder esp. for reducing tensions in the solderjoints as proclaimed by the company.
My electronics rosin core solder pref: Kester Tin 62 Lead 36 Silver 2 and/or 63/37 ( 60/40 is okay too, it's great for copper plumbing) BTW, Caution: Don't suck those fumes!
hi im from spain i have a little question,i have the same model and im having problems with my central speaker,it works for a time then my home cinema makes a clicky sound y maybe later comes to work again
I had a Mits Big Screen with the convergence STK and the damn thing had to be replaced about every two years, I agree it was a very bad design. Especially since I had to replace the damned thing myself, after a while the solder pads just gave up and I had to replace the entire board.. I did not do this, and a perfectly fine TV "otherwise" ended up on my burn pile.
I have Sony STR-D450, left speaker is louder than right, cleaned volume/bass/treble/balance knobs with contact cleaner and still the same... Tried to swich speakers, connected other pair, various cables, sources... And still left speaker is louder :( Thought?
Hey Hello, im from Germany and i have a Problem with the same one. I See you video reparing this sonny witch the same how i have. What can i do to repair it?
I have one of these which had the loud pop/beng noise on power on and also a quiet front right channel. I resoldered as shown here and that's fixed but the right hand channel is still way quieter than the left. It's quieter via headphones too if that helps anyone suggest what it might be?
Those pre-driver IC's should've had heat sinks on them or air moving over them. Anywhere the PCB is discolored is because of piss-poor thermal management. Put a fan on the top of the unit or you are sure to have more failures. Are you not able to get 60/40 in Canada?
I have 2 of them that have failed str type modules, same design that have failed. They are the voltage amp drivers like in this one but the thick film design. I have another one my bench amp that the stk power module was bad when I got it. They certainly did not forgive when customers did dumb things like short the speaker wires. That's why Sony went back to discrete. Sony used them in the convergence circuit on their projection TV and they failed left right and center. At that time that made me very happy because I could charge big bucks to fix big TVs.
The 3 channel STK ICs used in the projection TVs were a disaster, and at 90 bucks a pop, that was the initial price from Sony, they were an expensive disaster for the customer. By the time the set was picked up, repaired and delivered they were looking at a 500.00 bill. When the after market ICs became available they dropped a little in price, but so did the reliability of the counterfeit ICs.
under side access denied.Thats indeed stupid! I couldn't agree with you more.Before I thought I was the only person that felt that way. Anyway..Royalty free music..good one..may I have some of that good guitar music...haha...seriously if you would be so kind to! Good video!!!
I wish I could, but that would be violating the license. You can get all that great music through the web site musicbakery.com You can listen to everything, on the site.
Hello friend here in Brazil in the state of Rio de Janeiro I am not getting the model of the sony model str501 will be able to help me because I tried to leave in many electronic but no one discovered the defect say it has that there is a diagram of the device! but I have then opened the radio and I saw that a resistor coming out a smoke almost imperceptible I disconnected one side of that resistor and the radio armed without appearing written on the screen protection But there is no audio in the speaker! Help me!
You can order Kester 60/40 solder from Jameco Electronics (jameco.com) located here in the San Francisco Bay Area. A 1-pound spool is around $35 US. Thanks for the video.
The old way was better you know using lead off wires to the high power component from the printed circuit board so the printed circuit connection doesn’t get flexed.
i've got an old str-de635 (which i still use daily) which tends to buzz and pop on the speakers from time to time. usually after turning it on for 3-4-5 seconds, and then when it's already on , it does that kind of things randomly for half a second on random channels. is this the same problem with the unit you were repairing?
More than likely it is the same issue. It is very common, and depending on which connections break it can cause distortion, sound to cut in and out, go into protection, and even cause components to fail.
12voltvids i managed to fix it, now it's as good as it was before. thanks. if i didn't see your video i would probably not even think about fixing it. (mine has the removable bottom, so it was an easy fix as i didn't have to take it apart).
My STR-D611suddeenly the left channel has become very low... Tried to switch speakers, and it is fir sure the left output. Please give me some idea before I decide to trash it. Thanks!
Hello, I have a question about sony HCD-Rv 600D. This is an old deck I buy from a customer It work properly about six months and Now there is no sound. In Display panel shows only Sony Demo. Do You Know how to cancel this. ( if the demo mode is on we Don't Get any sound ? )
sajin ks sachu Sorry don't know the procedure on that one. Demo mode is usually activated by holding one of the buttons for several seconds. Like the power or volume down or input. The owners manual will tell you how to do this. Most owners manuals can be found online.
sajin ks sachu Do an online search for the procedure. I had a Panasonic mini system in for service that the client said it was in demo mode and after research I discovered that all I had to do to cancel that feature was set the time on the clock. I just googled the model number with turn off demo mode and the results had the info. Good luck.
you would have thought the techs that work in Sony service centers would have complained about these receivers not having a bottom plate that could be removed and then someone working in the Sony design center would have done something about it.
We did complain but the factory didn't care. It really didn't add that much more time to the repair, except that the power transformer was unplugged with the board in service position, so it is harder to test under power.
Both. I worked for Sony Canada for a year and then I left and went to a dealer service center an spent 20 years there. Got fed up with the bs, got out and got a real job with the fone company. We still do phones but it is mostly Internet and cable TV now. Hey it pays the bills and is a union shop so good benefits and a pension.
12voltvids Thank you for your videos, Ive successfully fixed a dvd players power supply and laser besides cd and tape deck of an older philips hifi after watching a few. Your recent Marantz video might help me fix my Akai AA930 receiver which isnt producing sound through the speakers and only a faint signal through the headphones when i raise the volume 3/4 up (I didnt touch it for a year, it was working perfectly before).
60/40 is still available! www.radioshack.com/products/rosin-core-solder-8-0-oz?variant=20331827909&gclid=EAIaIQobChMIrai5sf3U2wIVRrbACh3fLwqNEAQYASABEgJktvD_BwE
Well that's what we have to use if we want to make any money on the video. If I had to give away my earnings then I simply wouldn't do it as I am sure you would do at your job if your boss said great job, but we are going to give your earnings to (insert whoever claimed your money here) Actually, much of it is great music. It might not be to your tastes, but I bet many would think the same for what you listen to.
And here is another fucking troll out there spewing shit. What difference will it made if someone is wearing a metal watch when working on equipment? It isn't like we wear mhem if we are working on energized equipment. Rule 1 if electrical work is when working on energized equipment only 1 hand is in the work space, the other hand is in your pocket. That way if you do make contact with a hot circuit, there is no path of discharge across the heart, and no risk of electrocution. If anyone had told me not to wear my watch or wedding ring at work I would have told them to fuck off. I don't wear a ring now not because I am afraid of getting a shock, but because one day I caught it on a door handle at a store and it dam near took my finger off.Gave me a deep cut almost to the bone. Doctor at the ER told me stories of how many fingers he had seen severed in the exact same way.
Thank you very much, I finally got my old sony receiver working because of your expertise.
I just got my hands on one of these. My aunt was about to throw it away. The solder didn't look as bad as the one you had but I just refreshed it on the exact same parts and it work just fine again! Thanks a lot! :)
My Sony STR-DE845 and I say "Thanks!". Mine weren't nearly this bad, and given I'm a hack with a soldering iron I just reflowed the existing solder. Working perfectly now. :)
Thanks so much. This was exactly what I needed to fix my STR-DE345. It would cut out intermittently and now it’s working solid again after watching this video and resoldering the connections pointed out.
Hi I must say this engineer in my opinion is a very safe and excellent engineer I over the last year or so I have learnt a lot with fixing tv and other bit so please keep uploading your videos as I also enjoy watching them thanks for all your videos and help
Thanks for posting this video. My Sony str de345 was having the same problem. The cracking in the solder joints were not as bad as your unit but after looking with a hand held magnifier I found the cracking. Read soldered and working for now but did notice the base of the circuit board is discoloured perhaps because of excess heat.
Your videos are awesome. Been a subscriber for years, and your knowledge is just incredible. I realize this video is several years old, but these videos never get old.
Dave, thanks in part by you, I fixed my STR SE501. Knock on wood, only a loose connection.
Great teacher! Man your hard to find!! You should advertise because people like me are looking for you. Great explanations, you probly don't realize how good you are.
This is awesome. Just got this receiver dirt cheap, shows first signs of this error. (Volume will vary/cut out when moving it on the surround channels). I already suspected exactly this issue, and decided to google it up before attempting the fix. Expected a forum post of some sort, but instantly found your vid. Thats why I am subscribed for years already. I don't even need to mention of course the assumption was dead right. Works like new after reflowing with some nice leaded solder.
This really is a common issue with older multi channel amps.
Hello. Great videos. Your comments about the thermal stress of components causing problems with solder joints are very apt. The use of lead free solder that you illustrated, provoked the suggestion made many years ago that amps and such like should be left powered on and not switched off.
My 22 year old Sony TAF442E is powered on all the time, although it has been switched off a few times. It works fine and has had no issues since I purchased the unit.
When I was in the broadcast industry all the VTRS, cameras, monitors were left powered up all the time. They would turn the beams off on the camera tubes, but leave them up and running all the time except when they were being moved to a location.
Thank you for this video... with it i could solve a problem that i had sinse 1 year ago... the center speaker and the rear left didn´t work... till now.. I resolder those components and.... PROBLEM SOLVED
Thank you one more time..
Regards From Portugal
Your the man! Just fixed my STR-DE835 with this method those solder points were gonzo
It affects many of these Sony models.
@@12voltvids any other common issues that would be good to know going forward?
@@jcber34 That is the common issue with these.
@@12voltvids gotcha thanks
Thanks for this video. I just diagnosed and repaired a rear channel cut out issue on my 20 +/- year-old STR DE 445 using this info.
This is the most common fault on this and many other receivers of this era. Thermal expansion of dissimilar metals causes cracks in solder connections
This helped me repair my Sony STR-DE495. Thank you so much!
Buddy you have just saved me a about 250 Bucks ..... you are man of the week . Thanks :-)
A big thank you for saying SOLDERING and not SODDERING haha, this is the Canadian - English (correct) way of saying it
Fast and easy repair! IU have its big brother the Sony STR DE935 bought it new back in the day, however I never hooked it up until about 3 years ago as I had another amp I liked, finally decided I should use it, after all I bought it! Its a great amp, mine is on 24/7 unless I'm going to be gone longer than overnight, then iy gets power down. It has an option to turn the display off, which I do...so as it will prolong the life the display. ~Jack, VEG
You still can buy Kester 60/40, my vintage roll of 1/2 # 60/40 that I bought in the 80's from Rat Shack is still going, will replace it with Kester brand. I use 60/40 for generic use and use Kester 63/37 silver for higher end stuff.
2 of the local suppliers now only have the cheap stuff, but I haven't been into the big shop because I work Saturdays, having Monday off, and that shop is closed Monday.
You may needs to buy online, that's what I do anymore.... ~Jack, VEG
Hi there, I have the stereo (2 channel) version of this receiver I think (STR-DE185), and my problem is NOT the volume cutting on and off, but the inputs change randomly (From Vid1 to Vid2 to CD, etc, not necessarily in that order). I've pulled the volume board, cleaned it & even replace the screws (it was missing 4 at the volume control). It STILL did it, but not as often. I then noticed when the room was cool, it wouldn't do it, so I removed the heat sink and reapplied Thermal paste (There's only 4 transiters & 2 tiny ones. I've had to do this with PC CPUs many times). It seemed to be cooler, but STILL did it, even less often. I started turning the volume control & it would start switching inputs randomly again, so I opened it up to clean the volume control, but it looked clean, that's when I saw your video. Could the problem be the same as this receiver you have & NOT the volume board at all? I checked the thing you resoldered and it doesn't feel loose, but does wiggle with very little force & only has one, black, thin & about 2 inches long (I don't want to remove the board to check, but the orientation is exactly the same: Heat sink exactly the same, except only 4 transistors, transformer exactly same & placed, board is similar but orientated the same, etc). I inspected all solder points in the volume board & all is good. I'll reassemble it now until you respond.....then if you think it's the same problem, I'll reopen it and remove the main board I guess... Thanks.... Please reply ASAP.....
Great video, gave good confidence to learn from the experts. I have Sony STR DB 870, all the speakers output are distorted. | went through the power transistors (complementary) all ok and the big block white resistor all reading very small ohm and also checked the solders of the components. Underneath the power IC on the board slightly blacked. What else could be the culprit. When I feed it through any channel outcome is same. Also did the headphone check and that is perfect sound. Thanks in advance
If you are looking for 60/40 specifically, The Source and Circuit-test (RP Electronics) still make that chemistry. If you are okay with the newer 63/37, you will be able to get MG or Kester at most local electronics places.
If you are looking at bulk orders, I use All-spec for my supplies. The site can be a little bit of a pain to navigate at first, but the search bar is very helpful if you have part numbers.
ive got the DE505 been working for many years until now, intermittant no sound. thanks for video i was thinking maybe a capacitor issue but hopefully an easy fix like you found
sony str de505 fixed, i hope. its working for now, i found a rectifer loose and re soldered it. mine has an removable access panel underneath. thanks for the motivation to fix it.
Always a pleasure to see your videos sir!
I have a Sony STR DE-205 (from 1996) on my Computer Desk and use it every day as a real Amplifier for my PC. At the year 2000 i bought a new Sony 5.1 Channel Amp and my Dad uses my STR DE-205 for a long Time. Another few years later i bought a Yamaha RX-V673 to use it mainly for my Home Cinema area. So my Dad bought himself a cheaper Yamaha AV-Receiver too and i get my Sony STR DE-205 back. At this Time it has some weird Audio Output that i fixed really fast: The Speaker-Relay had cold solder joints. I decided to check the whole unit with a magnifying glass for more questionable solder Joints to resolder them as a precaution. But i found only a few solder joints that speaks to me "resolder me". Especially the solder joints of the Driver IC needs a bit fresh solder. I don't understand why these Driver IC's aren't mounted on a heatsink. Now the unit is 24 Years old and works fine. I think there are two things that have saved the Life of this unit: I only hooked up speakers that have matched the allowed values and i never had a reason to turn the Volume up to the maximum. At the half way up it was loud enough.
A few years ago i bought one set of spare parts (driver IC and the output Transistors) just in case something went wrong. But so far i never had to replace these parts.
With every unit i get to repair i do my routine measurements and checkings. Often the owners connected Incompatible and/or more speakers in parallel, so the impedance was too low for the AMP and i have to rewire the Speakers.
Not only one of all my Amplifiers i ever had did blow up, because i always handled them gently and triple checked every connection before i turned them on.
I like to watch your Videos. I think it's nice to know that the most malfunctions are still the same and also has the same reason: Operator error.
I have a STR-DB780, which was a bit more complicated to open up. Problem was crackling sound and I could not get any reasonable sound on speech, but other sounds were ridiculously loud. And relays kept on ticking randomly. With your video I knew what to look for, thanks a lot for that! ^_^ Mine was not so bad around the power amps, but those relays were in a pretty bad soldering state. I did solder those P.A.s as well, once I got it opened up. Clearly you're a professional guy on this and IMO you are correct on all other stuff, but one; I think you still CAN get non-RoHS soldering wire ordered! Check out f.e. on the site of DigiKey for that. ;-) Good work, mate!
You can still buy leaded solder from eBay sellers in China! There's a tonne of it still stocked. I bought some more a few months back because mine ran out.
The Sony ES line does have a cutout in the bottom I believe
Hey there. I've got an STR-DE475 that has an intermittent sound problem. It appears to be a grounding issue at the pinch terminal for the front speakers. I think the plastic is stripped (small wonder, that) where the screws are meant to thread into them to connect the back plate to the grounding tab.
I don't think it's a fault with any of the solder joints. I don't have a magnifying glass, but I traced the circuit with a multimeter pretty far without finding any issues. Whereas, if I just manipulate the plastic terminal, I can restore stereo sound. The problem is that it doesn't last. I suppose the terminal settles back into a position where the signal cuts out.
That makes it seem to me that the hot is contacting the ground somehow, and that manipulating the terminal must break that shunt, albeit momentarily. It's pretty frustrating. I've had the unit for 20 years and it did what I needed it to for 16 (just playing stereo and being a radio receiver). But now, it doesn't even do that. So it's been moldering for the past four years, aside from when I take it out to try and fix it.
I really liked this very educational video. Thanks for showing the basics.
I belong to an antique radio club. At their swap meets, I've been able to stock up on lots of the old solder at very good prices. I would think that you should also be able to pick up the old solder on E bay.
I'm assuming there's no problem soldering on top of the new solder with the old?
And, just to let you know, I usually watch your commercials all the way through to the end. Every little bit helps....
Regards, Tom
Another great repair video. Does the receiver also display "Protection Mode" when you have this problem?
Yes it can. The one on my test bench did that. Went into protection.
My sony reciever has no sound. Has white noise and that's it. I think this might be the problem. Didn't find blown capacitors or burnt out ics. Fuses looked good. Soo I'm gonna check the solder now
stk and most other thick film units normally fail at the internal interface between the pins and the thick film unit inside
they used aluminium wire or aluminium internal pads and these all used to crack (like the pins go dry jointed on the pcb )
they still do this today .. bosch did it and i think they still do so in most of there automotive parts, and over the years ive had bmws every airflow sensor i have replaced and every abs module has always failed due to this exact same problem
Hello great video, I have a question I have a "Sony Receiver STR-DE898 7.1 Home Theater" and some of the speakers no longer sound, the ones that do not sound I have tried them on other Receivers and they work perfectly that means that the audio outputs Red and Black are damaged I really don't know anything about electronics and I would like to know what are the outputs that I should buy to place it on the Receiver thanks
I still use lead. Another little gift lead free gives is known as `Tin Whiskers'. They can cause shorts and its a big reason you wont see it, as far as I know, in Satellites. Great video.
Tin whiskers happen in leaded solder as well. It was still 60% tin.
Spacecraft most likely use gold just like the bond wires in ICs. Cost is no issue in a space craft because once it is launched there is no going up there to fix it. It either works for it's designed mission life of it is a total loss. Some things last much longer than designed mission life. Mars rover for example and voyager spacecraft.
@@12voltvids Yes, but not nearly as bad. Another thing is how lead free looks almost like a cold solder joint. It can add time inspecting a board. I'll take Kester anyday!
@@Mosfet510 Lead free is crap.
Hey dave how do you test those voltage amplifiers, i had loose connections on them now theres no sound output
good video and thanks for sharing your experience with electronic repairs
I have a 25 year old Technics receiver with a couple of Sanyo STK's in it. Still humming along with very litle maitenance. Must have got a good production run.
If you never crank it up, then many of then were fine. If you crank it up, or it is installed in a cabinet with poor ventilation, or components stacked which cause poor ventilation then bad things happen.
@@12voltvidsalso depends on the sensitivity of the speakers, easy to drive speakers are easier on the amplifier
Smashing repair, A bit of a pain in the bum to get to, but it was worth your effort.
Someone will love that :-D.
And there was no component damage, nice :-D.
if the bad connections were in the transistor bias circuits, then it could have been horrible.
Ive seen the same thing happen on the ic's mounted on the crt pcb on computer monitors, same thing, hot rgb driver ic's, death to the solder.
I do blame some of the failures because of minimal solder, a thin drum of solder around the pin just asking to crack, the black line of death :-(
Yup, too little solder is a problem on these large pins. Correct on blown parts. I have see outputs and the ICs fail when a bias signal is lost under load.
Thanks Dave .....great video :)
Hi the Sony Iam working on currently, the sound isn't strong..What could it be
I've dealt with stereos made in the 70's that were made of wood panels glued together with no screws, so you would have to break it open to service it.
Frank
Frank Reiser Video/Audio Service
Most of those console units I worked on you could remove the chassis from the cabinet and work on it separately. You just had to pull the back, which may have been stapled on to the real wood sides.
The IC 501 on the left of the loose one also looks to have bad joints (seen @8min), those big pins in between those IC's also looks a bit dodgy.
It was done off camera.
I have a Sony str-de595 it has very low sound on 42 you have to turn it up very loud to actually hear anything what could be the issue the relays
I like to use those star washers on ground screws - they bite in and stay tight.
In Germany, luckily you can still buy all the leaded solder you want. I could send you some if you can't find it anywhere else.
That's OK. Local supplier still sells 60/40. Just not the good Kester brand. It all comes from China now.
If you need a replacement for the 60/40 look at this link from Germany: www.elv.de/felder-nige-loetdraht-100-g-spule-1-0-mm.html . It is Ni/Ge Solder esp. for reducing tensions in the solderjoints as proclaimed by the company.
My electronics rosin core solder pref: Kester Tin 62 Lead 36 Silver 2 and/or 63/37
( 60/40 is okay too, it's great for copper plumbing) BTW, Caution: Don't suck those fumes!
hi im from spain i have a little question,i have the same model and im having problems with my central speaker,it works for a time then my home cinema makes a clicky sound y maybe later comes to work again
I had a Mits Big Screen with the convergence STK and the damn thing had to be replaced about every two years, I agree it was a very bad design. Especially since I had to replace the damned thing myself, after a while the solder pads just gave up and I had to replace the entire board.. I did not do this, and a perfectly fine TV "otherwise" ended up on my burn pile.
Yes I know, I changed hundreds of them,
Thank you very much, for this video..
Thanks for the Vid! Can you point me in the right direction to find a decent magnifying glass like yours?
Mine is just a cheap one made by Globe.I gutted the base and attached it onto an old desk lamp arm.
I have Sony STR-D450, left speaker is louder than right, cleaned volume/bass/treble/balance knobs with contact cleaner and still the same... Tried to swich speakers, connected other pair, various cables, sources... And still left speaker is louder :( Thought?
I have same problem with my STR-DE445, if you get answer please pass along to me, thanks.
Did you resolve this?
@@ronnienylund9764 expensive repair, so i sold it for parts...
@@bjn013 you can't recall what was the issue /failing component?
@@ronnienylund9764 no, but the price was almost like the amp...
Thanks very much - worked for me.
Hey Hello, im from Germany and i have a Problem with the same one. I See you video reparing this sonny witch the same how i have. What can i do to repair it?
Thank you for your instructions. Do you have a particular 60/40 soder wire to recommend?
I used to use Kester exclusively but the last few times I have just bought what the shop had on hand.
Wow,I do still expect more from Sony. But hey,not a bad fix after all that time.
Same problem with 485.?The amp loosing the center speaker when you press a litt
le bit the back cover the sound comes back...?
Nice repair
Your a GENIUS!
You can order led salder on amazon
It's available locally
VERY GOOD VIDEO THANKS A LOT .
I have one of these which had the loud pop/beng noise on power on and also a quiet front right channel. I resoldered as shown here and that's fixed but the right hand channel is still way quieter than the left. It's quieter via headphones too if that helps anyone suggest what it might be?
An you show me the components you are soldering I have a Sony STR-DE497 AV Receiver 7.1 Channel Surround Sound Cinema Amplifier with same problem
Those pre-driver IC's should've had heat sinks on them or air moving over them. Anywhere the PCB is discolored is because of piss-poor thermal management. Put a fan on the top of the unit or you are sure to have more failures. Are you not able to get 60/40 in Canada?
Designed to fail.60/40 is available here, but the brands I have seen are china crap. I want Kester.
Why were the Sanyo STKs an disaster for Sony?. I got 2 amps with those ICs, and I honestly can't complain.
I have 2 of them that have failed str type modules, same design that have failed. They are the voltage amp drivers like in this one but the thick film design. I have another one my bench amp that the stk power module was bad when I got it. They certainly did not forgive when customers did dumb things like short the speaker wires. That's why Sony went back to discrete. Sony used them in the convergence circuit on their projection TV and they failed left right and center. At that time that made me very happy because I could charge big bucks to fix big TVs.
When they fail, and they do, often all you can find are ebay untested, pulled (used) devices from chinese garbage recyclers.
12voltvids my neighbor had one of those tvs I replaced those damn little things 12 times
The 3 channel STK ICs used in the projection TVs were a disaster, and at 90 bucks a pop, that was the initial price from Sony, they were an expensive disaster for the customer. By the time the set was picked up, repaired and delivered they were looking at a 500.00 bill. When the after market ICs became available they dropped a little in price, but so did the reliability of the counterfeit ICs.
I have a 1978 Sanyo JCX 2250KZ reciever that uses STK ICs...
Does anyone have the rear center speaker connector assy. that has the 3 sets of push-clip quick connects? Mine is damaged.
under side access denied.Thats indeed stupid! I couldn't agree with you more.Before I thought I was the only person that felt that way. Anyway..Royalty free music..good one..may I have some of that good guitar music...haha...seriously if you would be so kind to!
Good video!!!
I wish I could, but that would be violating the license. You can get all that great music through the web site musicbakery.com You can listen to everything, on the site.
now worries.understood.
Hello friend here in Brazil in the state of Rio de Janeiro I am not getting the model of the sony model str501 will be able to help me because I tried to leave in many electronic but no one discovered the defect say it has
that there is a diagram of the device! but I have then opened the radio and I saw that a resistor coming out a smoke almost imperceptible I disconnected one side of that resistor and the radio armed without appearing written on the screen protection
But there is no audio in the speaker! Help me!
thank you!
I have de445, center and rear left and right doesn't work, anyone can explain what to do?
I have this receiver but I'm having issues with the fron speakert LR output. Sony says it needs repair
Could you help me out?
Everytime I turn my receiver on it warms up in my rear speakers turn off or flick off
Ive noticed in my years....anything made from 90's upwards has no access panel on the bottom, that and you've done this before.....
You can order Kester 60/40 solder from Jameco Electronics (jameco.com) located here in the San Francisco Bay Area. A 1-pound spool is around $35 US. Thanks for the video.
The old way was better you know using lead off wires to the high power component from the printed circuit board so the printed circuit connection doesn’t get flexed.
Worked !!!!!!!!!! Thx!!!!
i've got an old str-de635 (which i still use daily) which tends to buzz and pop on the speakers from time to time. usually after turning it on for 3-4-5 seconds, and then when it's already on , it does that kind of things randomly for half a second on random channels. is this the same problem with the unit you were repairing?
More than likely it is the same issue. It is very common, and depending on which connections break it can cause distortion, sound to cut in and out, go into protection, and even cause components to fail.
actually mine does go into protection from time to time. ok, thanks, i'll dust out my soldering guy and get down to work.
12voltvids i managed to fix it, now it's as good as it was before. thanks. if i didn't see your video i would probably not even think about fixing it.
(mine has the removable bottom, so it was an easy fix as i didn't have to take it apart).
My STR-D611suddeenly the left channel has become very low... Tried to switch speakers, and it is fir sure the left output.
Please give me some idea before I decide to trash it.
Thanks!
Ballance control? Try a reset. Other than that a scope to trace the audio path to see where the loss of signal is.
@@12voltvids Thanks! How to reset?
@@rickcorel5154 check owners manual. It is usually a combination of buttons on the front panel. Google it.
You NEED to tell me the name of the song at 21:49. It's so gorgeous!
Class of 69 by the music bakery.
musicbakery.com/royalty-free-music/class-of-69/
12voltvids Thanks so much!
Love your work. Bench needs a clean-up tho' Just sayin...
I suspect if a double sided plated though hole board was used this would not have happened.
Single sided boards will fail.
1975 - 1979 were the golden years of consumer audio gear - after that it was all pretty much shiny garbage.
Hello, I have a question about sony HCD-Rv 600D. This is an old deck I buy from a customer It work properly about six months and Now there is no sound. In Display panel shows only Sony Demo. Do You Know how to cancel this. ( if the demo mode is on we Don't Get any sound ? )
sajin ks sachu
Sorry don't know the procedure on that one. Demo mode is usually activated by holding one of the buttons for several seconds. Like the power or volume down or input. The owners manual will tell you how to do this. Most owners manuals can be found online.
12voltvids,
Thank you for your reply
I download the user manual but They Don't mention the Demo mode
sajin ks sachu
Do an online search for the procedure. I had a Panasonic mini system in for service that the client said it was in demo mode and after research I discovered that all I had to do to cancel that feature was set the time on the clock. I just googled the model number with turn off demo mode and the results had the info. Good luck.
12voltvids
Thank you so much. Let Me check by setting time
you would have thought the techs that work in Sony service centers would have complained about these receivers not having a bottom plate that could be removed and then someone working in the Sony design center would have done something about it.
We did complain but the factory didn't care. It really didn't add that much more time to the repair, except that the power transformer was unplugged with the board in service position, so it is harder to test under power.
Did you work in a Sony service center or an authorized dealership?
Both. I worked for Sony Canada for a year and then I left and went to a dealer service center an spent 20 years there. Got fed up with the bs, got out and got a real job with the fone company. We still do phones but it is mostly Internet and cable TV now. Hey it pays the bills and is a union shop so good benefits and a pension.
Are you a member of CWA?
USW
Yamaha AV receiver htr 2067 power problem
what is that red device near the tv?
Friendroid Variac variable transformator. 0______220 Volts
0- 135 here in North America. Mine is burning up, so I will have to get a new, larger one.
12voltvids Thank you for your videos, Ive successfully fixed a dvd players power supply and laser besides cd and tape deck of an older philips hifi after watching a few. Your recent Marantz video might help me fix my Akai AA930 receiver which isnt producing sound through the speakers and only a faint signal through the headphones when i raise the volume 3/4 up (I didnt touch it for a year, it was working perfectly before).
Hello sir I have same pice Sony amplifier do you Repair please sir please
What's the problem with your amp?
60/40 is still available! www.radioshack.com/products/rosin-core-solder-8-0-oz?variant=20331827909&gclid=EAIaIQobChMIrai5sf3U2wIVRrbACh3fLwqNEAQYASABEgJktvD_BwE
I am not surprised the music is royalty free, it is free of any musicality, it sounds horrible.
Well that's what we have to use if we want to make any money on the video. If I had to give away my earnings then I simply wouldn't do it as I am sure you would do at your job if your boss said great job, but we are going to give your earnings to (insert whoever claimed your money here)
Actually, much of it is great music. It might not be to your tastes, but I bet many would think the same for what you listen to.
Good video, but could have done without the 15 minutes of pointless commentary about tin copper and you running out of solder.
More minutes means more commercials. More commercials means more $$$ for me. Yippee!
I would never let anyone that wears a metal watch, work on my equipment ...
And here is another fucking troll out there spewing shit. What difference will it made if someone is wearing a metal watch when working on equipment? It isn't like we wear mhem if we are working on energized equipment. Rule 1 if electrical work is when working on energized equipment only 1 hand is in the work space, the other hand is in your pocket. That way if you do make contact with a hot circuit, there is no path of discharge across the heart, and no risk of electrocution.
If anyone had told me not to wear my watch or wedding ring at work I would have told them to fuck off.
I don't wear a ring now not because I am afraid of getting a shock, but because one day I caught it on a door handle at a store and it dam near took my finger off.Gave me a deep cut almost to the bone. Doctor at the ER told me stories of how many fingers he had seen severed in the exact same way.