Hello DiyAudio members.
Looking for a little help.
First, I am new to DIY on receivers.
I have a Luxman R-1050.
Everything was working fine then suddenly for the past week sound is only coming from one side.
Doesn't matter if I am on FM/AM or phono. Sound only comes from the one side. Switch the connections on the speakers just to prove it wasn't a speaker problem.
The channel lights seem to indicate that sound should be coming from both channels..
Kinda of hoping one of you experts have seen this before and you are going to tell me to clean a switch or two..
P.S.. No videos of anyone restoring a Luxman 1050 out there.. To bad 😭
Thanks for the help.
Looking for a little help.
First, I am new to DIY on receivers.
I have a Luxman R-1050.
Everything was working fine then suddenly for the past week sound is only coming from one side.
Doesn't matter if I am on FM/AM or phono. Sound only comes from the one side. Switch the connections on the speakers just to prove it wasn't a speaker problem.
The channel lights seem to indicate that sound should be coming from both channels..
Kinda of hoping one of you experts have seen this before and you are going to tell me to clean a switch or two..
P.S.. No videos of anyone restoring a Luxman 1050 out there.. To bad 😭
Thanks for the help.
Do you have, or can you get, some "Cramolin", spray contact cleaner? It's been around a long time, but still the best I've seen.
Do you perhaps have a 'speaker select' switch? Start there with some or another contact cleaner -- or at least 'exercise' the switch.
Cheers
Do you perhaps have a 'speaker select' switch? Start there with some or another contact cleaner -- or at least 'exercise' the switch.
Cheers
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Spray the balance and volume pots as well, and check their soldering.
And check the input selector also.
And check the input selector also.
@CanadianJack, you should check source selector (input selector), on such old device you have oxidized contacts which must be properly cleaned.
I doubt that speaker switch is the problem (if any exists). On low level switch problem with oxidation is much more present.
I doubt that speaker switch is the problem (if any exists). On low level switch problem with oxidation is much more present.
Oh for crying out loud!
First, have the fault troubleshot by someone who knows what they are doing! That would be a good audio technician.
Chemicals are tools that can damage the parts they are applied to. The quantity of cleaning solution can and does wreck controls over the long term. Using the proper solution in the proper location is your best bet.
The fault may be a circuit failure, and some parts cannot be cleaned.
I'm a professional audio service technician with over 45 years experience ... and I did warranty on Luxman plus several other very high ends brands. I don't care who you take it to, I'm just trying to reduce your service costs and prevent your unit from being damaged. In addition, there are other things that need attention by now and the performance can be increased or future problems avoided while this is being dealt with.
I use a rather good Luxman system in the bedroom (C-02 / M-02 system) and the entire point is the great performance. So if your R-1050 isn't delivering the performance it should be, you are only short changing yourself. It's then kind of a lie. What you are listening to isn't an R-1050 anymore.
The last thing I'll say is that most people calling themselves technicians these days are incompetent rip-off artists. Using them can cause the total loss of your equipment, or very increased service costs to undo the damage they have done. Or worse, it works, but performs poorly and you never get the benefit of having a good piece again. Most of my work these days is reversing damage done by idiots, or self service attempts by equipment owners or friends trying to help them out.
-Chris
First, have the fault troubleshot by someone who knows what they are doing! That would be a good audio technician.
Chemicals are tools that can damage the parts they are applied to. The quantity of cleaning solution can and does wreck controls over the long term. Using the proper solution in the proper location is your best bet.
The fault may be a circuit failure, and some parts cannot be cleaned.
I'm a professional audio service technician with over 45 years experience ... and I did warranty on Luxman plus several other very high ends brands. I don't care who you take it to, I'm just trying to reduce your service costs and prevent your unit from being damaged. In addition, there are other things that need attention by now and the performance can be increased or future problems avoided while this is being dealt with.
I use a rather good Luxman system in the bedroom (C-02 / M-02 system) and the entire point is the great performance. So if your R-1050 isn't delivering the performance it should be, you are only short changing yourself. It's then kind of a lie. What you are listening to isn't an R-1050 anymore.
The last thing I'll say is that most people calling themselves technicians these days are incompetent rip-off artists. Using them can cause the total loss of your equipment, or very increased service costs to undo the damage they have done. Or worse, it works, but performs poorly and you never get the benefit of having a good piece again. Most of my work these days is reversing damage done by idiots, or self service attempts by equipment owners or friends trying to help them out.
-Chris
Thanks for the response. Did a quick search on Cramolin Contact cleaner. It is not readily available but I will keep searching. Many other brands of contact cleaners are available but I will keep searching for Cramolin a while longer.. Thanks for the advice.
So it sounds like something untoward has happened if it's been OK for ages and then suddenly it has gone permanently dead on one channel.
Basic checks. Switch the thing off and check the four fuses (two per channel) that supply power to the power amplifier stages. These are labelled F101A, F101B, F102A and F102B and are 2.5 AT type (T= time delay or slow blow).
If one or more is blown DO NOT just replace them. You would need to do further checks first and quite possible you would find that the output stage in one channel has failed, possibly as collateral damage due to another issue elsewhere in the power amp section.
Hi Chris,, I can feel your pain. As you are a technician you probably spent more time on repairs caused by DIY'ers making a big mess of what would have been an easy fix.. I am more in agreement with you then you may think.. But,, If I can try to do an easier repair like cleaning some contact switches then I will do that.. It is for the better of my marriage. 😂. I will not try and replace parts or do any soldering or even trouble shooting past a general cleaning.
Second question to you is.. How is the best way to search for a Vintage Stereo Receiver Technician ?
Not really 🙂 but a service manual gives you the best starting point and tells you what you need to know. There is nothing new under the sun with all these circuits:
Still,, here's a man that can understand a service manual and tell the rest of us what to do and look for 😀. Thanks.
See what you find first... no point guessing without basic checks. Everything hinges on whether the output stage has failed as to what you are looking at repair wise.
Oh, many of the others can do that as well.
I'll look in later.
Oh, many of the others can do that as well.
I'll look in later.
Give me a few days to purchase some contact cleaner, clean the switches, and check the fuses..
I would agree with that. Don't go squirting everything in hope... it's almost certainly not going to work.
Don't spray anything.
I had to be taught how to properly clean controls and switches. Sounds simple, but it isn't. Use of the wrong product in the wrong way will damage the control in time. Once you see it, it is too late.
First rule of troubleshooting. Examine the product, confirm the fault and get as much information as you can from controls and switches (by operating them slowly). Then using the service manual you check things to narrow down the faulty circuit. Note you haven't done anything to the unit yet! Never apply too much cleaner to a control or switch - ever! If a part does not need cleaning, you are further ahead to leave it alone! All cleaners have negative aspects to their use as well.
Service manuals are not complete guides, they assume complete and competent training on your part. A service manual points out specific details for that piece of equipment. They may touch on common things as well, but they are in no way a guide on how to be a technician. There are years of education and training before you crack open a manual.
Now, I really do not want to do simple service, and often try to get the customer to do as much as I feel they can properly handle. I also know a client will not bring something in until they can't use the product, period. There are normally multiple faults as a result. Even the age aspect warrants a visit to a good tech. Do not "recap" the poor thing!
Most of my work is due to people who claim to be technicians, and these people should have their irons broken over their head! They certainly should be liable for the damage they cause.
I can and have successfully rebuilt car engines over the years, but I would never do one for myself or anyone else. That is not my expertise and I know there are many small things that are so important I don't know about. Same for other professions. I pay them and get a proper job done. The problem is that things that look simple are sometimes not. Techs move through things quickly in their head and don't think of them. It can be difficult to play out each step to teach someone. We process mentally without thinking of the steps and take clues from all kinds of things in a unit. That takes years to teach and learn and you'll still never get it all. It takes many decades to become really, really good. Just like any other skilled profession.
Just keep that in mind. If you can find someone who is really good, it would pay big time to use them.
I had to be taught how to properly clean controls and switches. Sounds simple, but it isn't. Use of the wrong product in the wrong way will damage the control in time. Once you see it, it is too late.
First rule of troubleshooting. Examine the product, confirm the fault and get as much information as you can from controls and switches (by operating them slowly). Then using the service manual you check things to narrow down the faulty circuit. Note you haven't done anything to the unit yet! Never apply too much cleaner to a control or switch - ever! If a part does not need cleaning, you are further ahead to leave it alone! All cleaners have negative aspects to their use as well.
Service manuals are not complete guides, they assume complete and competent training on your part. A service manual points out specific details for that piece of equipment. They may touch on common things as well, but they are in no way a guide on how to be a technician. There are years of education and training before you crack open a manual.
Now, I really do not want to do simple service, and often try to get the customer to do as much as I feel they can properly handle. I also know a client will not bring something in until they can't use the product, period. There are normally multiple faults as a result. Even the age aspect warrants a visit to a good tech. Do not "recap" the poor thing!
Most of my work is due to people who claim to be technicians, and these people should have their irons broken over their head! They certainly should be liable for the damage they cause.
I can and have successfully rebuilt car engines over the years, but I would never do one for myself or anyone else. That is not my expertise and I know there are many small things that are so important I don't know about. Same for other professions. I pay them and get a proper job done. The problem is that things that look simple are sometimes not. Techs move through things quickly in their head and don't think of them. It can be difficult to play out each step to teach someone. We process mentally without thinking of the steps and take clues from all kinds of things in a unit. That takes years to teach and learn and you'll still never get it all. It takes many decades to become really, really good. Just like any other skilled profession.
Just keep that in mind. If you can find someone who is really good, it would pay big time to use them.
Hi Anatech,
First, thank-you for the detail reply.
I totally understand what you are saying, especially since we are talking about rare audio components. Everyone has there specialty. I am a Cyber Security experts for very large organizations. Definitely not an electronic technician. But, this is a DYI site. I guess what I was looking for was a simple resolution that perhaps Luxmans were notorious for.
Since I have owned this receiver for 20 years and have never opened it,, should I take the cover off and air blow any dust off,, check some fuses,, the if still not working try and find a reputable technician ?
First, thank-you for the detail reply.
I totally understand what you are saying, especially since we are talking about rare audio components. Everyone has there specialty. I am a Cyber Security experts for very large organizations. Definitely not an electronic technician. But, this is a DYI site. I guess what I was looking for was a simple resolution that perhaps Luxmans were notorious for.
Since I have owned this receiver for 20 years and have never opened it,, should I take the cover off and air blow any dust off,, check some fuses,, the if still not working try and find a reputable technician ?