I have an old 35 foot Class A Motor Home, 2003 model with the CRT type back up camera receiver in the dash. Every year before we head her South for the Winter months I have to pull that old CRT out and re-solder the power input as they just will not hold up to the vibration of that big old 8.3L Vortec V8 engine as we pull over the Rocky's and into the desert of Arizona. Ah but that was long ago now, she sits idle now because traveling without my lovely wife is just not any fun. GOD how I miss her, she has been gone now for nearly a month and my heart has yet to begin to heal, 51 years and 4 days we were were man and wife, and stayed that way till death did we part. Friggin cancer!
So sorry to hear that. I would be in the same state of mind if something happened to my wife. Been with her now almost 40 years. She was still in high school . Have lost many friends to the big C and have one friend that is battling it right now. I lost my mother last year to the big C. She was 92 however but in the last couple of months went down hill very quick and they suspect cancer.
thanks for repairing this for me dave. wouldn't surprise me if something was spilled in it this was a thrift store find and it was pretty grimy when i got it. whoever owned it before also left energizer batteries in the remote totally ruined it the acid ate up the traces and when i tried to clean it up the pads the buttons touch on just wiped right off the board. had to find another remote on ebay.
Thanks for the video, I purchased one of these beast about ten years ago off Ebay for 20 bucks, she has been working great for me ever since, but I just wanted to know more about the set, this shows the inside without me having to tear her open. Oh indeed the FCC can be a bit of a bear when it comes to transmitting on the public airwaves without proper licensing. Even with a Ham ticket, you have to avoid the Am and FM frequencies. I recall back in 1970 we had fellows in Vietnam who had taken old 26D units that were not being used for teletype and broadcasting pirate radio over AM frequencies. It was great, of course there were not a lot of folks who gave a dam about such things over in Nam back then. I usually tuned to AFVN back then, as a matter of fact I have built a few WIFI receivers that I have tuned to the rebroadcast of AFVN Vietnam broadcasts, one is hooked to the tape input of that very same SONY unit you have on the bench in this video, well the very same type, of course not the same unit. Sort of fun to listen to the old music and those advertisements for the Army were classic, "Don't forget to take your malaria pills every morning with breakfast!"
Nice vid. Gave me some stuff to watch for when repairing my STR-AV770. I've had it since new in 1990 and after about 3 months after purchase I had to take it back to the dealer to get those ground screws tightened!
I love your repairing work, how you always trace down the fault and repairing it .You always make the job look so easy.Is there any way to be like you?
Very nice am/fm stereo receiver amplifier,,,,fair bit of work with the re-soldering the dry joints and also finding corrosion on the circuit board,,,caused by water had been spilt into it from the cabinet stains seen.
Isn't it better to put a thin wire in the tin when repairing the PCB wiring than to solder the joint for many seconds. That's it for ungluing the PCB connection and the wires can be melted into the solder quite quickly. The connections do not suffer from overheating.
Hey 12voltvids I love your videos I've learnt so much from you with the analogue revival going on now i'd expect a lot more working coming your way soon! stock up on belts! Take care, from the UK
I have one very similar to this unit. I think it is an STRAV360 or similar number. Same problem. I ended up re-doing every single solder joint on the main board. Every time I thought that I found every bad one, another 10 cropped up. So I just used the shotgun approach and did them all. Mine has a lithium button cell behind the front cover near the display that backs up the stations. I believe it is a CR2032, with solder tabs on it. Amazingly, mine has the original from 1986 or so. It will still hold the stations for a week. Hard to believe there is anything left in it after all of these years.
That,s great that u still have an am stereo station there in your country,,,as we no longer have them here in Australia. As am stereo signal goes out a lot further than fm stereo.
This was great. I have a newer than this Sony that has one channel that is a lot quieter than the other. Balance controls are all handled through the menu, and have made sure that was centered. Could a connection issue like this make one channel quieter than the other?
The speaker relay protects absolutely nothing when it's energized however when it's de-energized the outputs are disconnected from the speakers. It's a speaker protection circuit that protects the speakers if an overload is detected it will be energized the relay to protect the amplifier if the amplifier fails and is providing DC voltage to the speaker terminals it will the energize the relay. this is most important during power up and shutdown because as capacitors charge and discharge there will be swings in the DC voltage on all amplifiers. There's a delay built in which prevents the relay from being energized for several seconds until the DC has stabilized and gone to zero only then will the speaker energize will you turn it off this relay opens immediately before the power draining out from the power supply would cause any significant rise and the DC potential on the speaker outputs. I would not run an amplifier that did not have a speaker protection relay or a blocking capacitor or an output transformer. Blocking capacitors are the older quasi complementary output configuration that used for npn transistors and the midpoint was actually floating about half of the DC potential so a blocking capacitor was necessary for operation. Transformers were used more in vacuum tube equipment unless we don't have to worry about DC passing through the transformer.
i have a sony ta-636 amp from 1980 one channel very occasionally crackles, doesnt need the pots cleaning did all that, i suspect a failing transistor. its already been re-capped with nichicon fine gold.
I have a sony_str-313l , a cute little beautifull receiver that i bought. Same problem, i didn't start to repair it yet. The previous owner made a mess in it, trying to repair it. I suspect bad capacitors or transistors or bad connections.
Smashing, the evil crack-i-tus is fixed :-) I know that through hole components are poo pooed for there faults, but they are a hell of a lot nicer to repair than smd, ok i'm old fashoned and like old tech :-D
I am considering to send you some pieces of equipment for repair. I'm in California... do you know how if these items have to go through customs at the border or they go freely? Do you ever get items for repair from the US? Thank you
Yes they go though customs. As long as they are declared as salvage with no value there are no taxes assessed. If a deckard value is placed then broker and 12% taxes are charged .
I thought that youtube had a good policy on music copyright when it comes to educational videos. I think you can play all sorts of music if it's for an educational video. For the radio station it just depends on your neighbours. If they are cool or not.
Educational videos mean nothing. Copyright is copyright. You can use 8 seconds without pulling a match and after that content I'd will get you. You can use whatever you want if you don't monetize your videos and the copyright owner will monetize it for you.
@@12voltvids Perhaps they changed the policy. Around 5-8 years ago (i can't remember) they pulled the music from two of my videos. I contested one saying it was educational and they put the music back on. (Dub side of the moon) on one of them and the other was a video of the actual artist and i got permission from his manager, not sure how the process went now but it must have been quite simple as that one was also fixed. Perhaps i should just pull the video incase i get in trouble but it's not monetis(z)ed it had 100K views but i'm not really interested in keeping it any longer. But as long as they don't take the music down again i'm not sure how much trouble i could get into. Since they already had put the music back on then the ball is probably in their court and they probably not take responsibility. Not sure but at the time i remember there being a thing about music on educational videos. I had some small FM transmitters back in the day and we did a little pirate radio out of our school. We only got in trouble with the teachers for disturbing the (prepwork) homework hours and having a complaint from the village but we were making jokes about all of the teachers. Some friends of mine had a slightly more serious pirate radio station and they used to climb towers and install their own transmitters more like 200W or so.
This is amazing. A few cold solder joints can make something stop working properly. I did this to a 1980s "ghetto blaster" style boombox which had weak output. It was on the main filter cap, I must have "woken" it up with the iron when I touched up a ton of solder joints. I just need to fix the controls and replace belts in the tape deck and clean everything up. The unit was in rough shape when I got it. It's a Magnavox D8443. Here's a video of mine m.ruclips.net/video/cKh4q7sCGr4/видео.html
I have an old 35 foot Class A Motor Home, 2003 model with the CRT type back up camera receiver in the dash. Every year before we head her South for the Winter months I have to pull that old CRT out and re-solder the power input as they just will not hold up to the vibration of that big old 8.3L Vortec V8 engine as we pull over the Rocky's and into the desert of Arizona. Ah but that was long ago now, she sits idle now because traveling without my lovely wife is just not any fun. GOD how I miss her, she has been gone now for nearly a month and my heart has yet to begin to heal, 51 years and 4 days we were were man and wife, and stayed that way till death did we part. Friggin cancer!
So sorry to hear that. I would be in the same state of mind if something happened to my wife. Been with her now almost 40 years. She was still in high school . Have lost many friends to the big C and have one friend that is battling it right now. I lost my mother last year to the big C. She was 92 however but in the last couple of months went down hill very quick and they suspect cancer.
thanks for repairing this for me dave. wouldn't surprise me if something was spilled in it this was a thrift store find and it was pretty grimy when i got it. whoever owned it before also left energizer batteries in the remote totally ruined it the acid ate up the traces and when i tried to clean it up the pads the buttons touch on just wiped right off the board. had to find another remote on ebay.
I was lucky, when I got mine, I had an old SONY multi remote unit that worked right off on this set, still use it to this very day!
Thanks for the video, I purchased one of these beast about ten years ago off Ebay for 20 bucks, she has been working great for me ever since, but I just wanted to know more about the set, this shows the inside without me having to tear her open. Oh indeed the FCC can be a bit of a bear when it comes to transmitting on the public airwaves without proper licensing. Even with a Ham ticket, you have to avoid the Am and FM frequencies. I recall back in 1970 we had fellows in Vietnam who had taken old 26D units that were not being used for teletype and broadcasting pirate radio over AM frequencies. It was great, of course there were not a lot of folks who gave a dam about such things over in Nam back then. I usually tuned to AFVN back then, as a matter of fact I have built a few WIFI receivers that I have tuned to the rebroadcast of AFVN Vietnam broadcasts, one is hooked to the tape input of that very same SONY unit you have on the bench in this video, well the very same type, of course not the same unit. Sort of fun to listen to the old music and those advertisements for the Army were classic, "Don't forget to take your malaria pills every morning with breakfast!"
Nice vid. Gave me some stuff to watch for when repairing my STR-AV770. I've had it since new in 1990 and after about 3 months after purchase I had to take it back to the dealer to get those ground screws tightened!
Excellent fix as always.
I love your repairing work, how you always trace down the fault and repairing it .You always make the job look so easy.Is there any way to be like you?
Very nice am/fm stereo receiver amplifier,,,,fair bit of work with the re-soldering the dry joints and also finding corrosion on the circuit board,,,caused by water had been spilt into it from the cabinet stains seen.
Isn't it better to put a thin wire in the tin when repairing the PCB wiring than to solder the joint for many seconds. That's it for ungluing the PCB connection and the wires can be melted into the solder quite quickly. The connections do not suffer from overheating.
Hey 12voltvids I love your videos I've learnt so much from you
with the analogue revival going on now i'd expect a lot more working coming your way soon! stock up on belts!
Take care, from the UK
I have one very similar to this unit. I think it is an STRAV360 or similar number. Same problem. I ended up re-doing every single solder joint on the main board. Every time I thought that I found every bad one, another 10 cropped up. So I just used the shotgun approach and did them all.
Mine has a lithium button cell behind the front cover near the display that backs up the stations. I believe it is a CR2032, with solder tabs on it. Amazingly, mine has the original from 1986 or so. It will still hold the stations for a week. Hard to believe there is anything left in it after all of these years.
That,s great that u still have an am stereo station there in your country,,,as we no longer have them here in Australia. As am stereo signal goes out a lot further than fm stereo.
This was great. I have a newer than this Sony that has one channel that is a lot quieter than the other. Balance controls are all handled through the menu, and have made sure that was centered. Could a connection issue like this make one channel quieter than the other?
I really really wish I could do a apprenticeship for someone doing this type of thing..
I had a model close to this one...on mine the micro switches for the front function buttons failed had to replace them
Does the (Speaker) Relay protects the Speakers off DC charge? From high Dc offsets?
The speaker relay protects absolutely nothing when it's energized however when it's de-energized the outputs are disconnected from the speakers. It's a speaker protection circuit that protects the speakers if an overload is detected it will be energized the relay to protect the amplifier if the amplifier fails and is providing DC voltage to the speaker terminals it will the energize the relay. this is most important during power up and shutdown because as capacitors charge and discharge there will be swings in the DC voltage on all amplifiers. There's a delay built in which prevents the relay from being energized for several seconds until the DC has stabilized and gone to zero only then will the speaker energize will you turn it off this relay opens immediately before the power draining out from the power supply would cause any significant rise and the DC potential on the speaker outputs. I would not run an amplifier that did not have a speaker protection relay or a blocking capacitor or an output transformer. Blocking capacitors are the older quasi complementary output configuration that used for npn transistors and the midpoint was actually floating about half of the DC potential so a blocking capacitor was necessary for operation. Transformers were used more in vacuum tube equipment unless we don't have to worry about DC passing through the transformer.
i have a sony ta-636 amp from 1980 one channel very occasionally crackles, doesnt need the pots cleaning did all that, i suspect a failing transistor. its already been re-capped with nichicon fine gold.
I have a sony_str-313l , a cute little beautifull receiver that i bought. Same problem, i didn't start to repair it yet. The previous owner made a mess in it, trying to repair it. I suspect bad capacitors or transistors or bad connections.
lucky its a nice unit to work on.
Excelent sir
Dave...any interest in working on a Sony Str 190?
Looks like a couple of capacitors on the bottom board are starting to bulge
Smashing, the evil crack-i-tus is fixed :-)
I know that through hole components are poo pooed for there faults, but they are a hell of a lot nicer to repair than smd, ok i'm old fashoned and like old tech :-D
Nobody likes SMD. They are all a pain in the but to work on
I have a sony str-av 370x it sound wont come
I am considering to send you some pieces of equipment for repair. I'm in California... do you know how if these items have to go through customs at the border or they go freely?
Do you ever get items for repair from the US? Thank you
Yes they go though customs. As long as they are declared as salvage with no value there are no taxes assessed. If a deckard value is placed then broker and 12% taxes are charged .
@@12voltvids Thanks, Dave. Can you shipthem back? Can you give me an estimate before I ship them out?
Could you reply on a private message?
I thought that youtube had a good policy on music copyright when it comes to educational videos. I think you can play all sorts of music if it's for an educational video. For the radio station it just depends on your neighbours. If they are cool or not.
Educational videos mean nothing. Copyright is copyright. You can use 8 seconds without pulling a match and after that content I'd will get you. You can use whatever you want if you don't monetize your videos and the copyright owner will monetize it for you.
@@12voltvids Perhaps they changed the policy. Around 5-8 years ago (i can't remember) they pulled the music from two of my videos. I contested one saying it was educational and they put the music back on. (Dub side of the moon) on one of them and the other was a video of the actual artist and i got permission from his manager, not sure how the process went now but it must have been quite simple as that one was also fixed.
Perhaps i should just pull the video incase i get in trouble but it's not monetis(z)ed
it had 100K views but i'm not really interested in keeping it any longer. But as long as they don't take the music down again i'm not sure how much trouble i could get into. Since they already had put the music back on then the ball is probably in their court and they probably not take responsibility. Not sure but at the time i remember there being a thing about music on educational videos.
I had some small FM transmitters back in the day and we did a little pirate radio out of our school. We only got in trouble with the teachers for disturbing the (prepwork) homework hours and having a complaint from the village but we were making jokes about all of the teachers. Some friends of mine had a slightly more serious pirate radio station and they used to climb towers and install their own transmitters more like 200W or so.
I could bearly hear you at the end , that was a lot of soldering I would of mist
This is amazing. A few cold solder joints can make something stop working properly. I did this to a 1980s "ghetto blaster" style boombox which had weak output. It was on the main filter cap, I must have "woken" it up with the iron when I touched up a ton of solder joints. I just need to fix the controls and replace belts in the tape deck and clean everything up. The unit was in rough shape when I got it. It's a Magnavox D8443.
Here's a video of mine
m.ruclips.net/video/cKh4q7sCGr4/видео.html
😍😍😍😍😍😍
Very informative video. Where can I go to find your address to send some gear to you?
TOOOOOOOO LOUD, and couldn't see the scope on that angle at the start of the video.
Is this a music video???
I could see the scope and hear the sound just fine and I am half deaf.
Half deaf people have a very poor dynamic range thats why
which half?