Going through the comments and it's really apparent that Harman Kardon isn't what they used to be. The only time that I have ever got capacitors that still had a 16v charge on them came from a seller on eBay and they were supposed to be new! The seller refunded me my money and I purchased something else from the same seller which turned up new. Those big brown capacitors almost look like the bad ones that I got...
Sir you really helped me a lot with this video! I have the AVR635 and it will not turn on. I will now go home and troubleshoot while watching your video on my iPad and will let you know what I come up with. :) Thanks so much
One of the things that you might consider getting is an ESR meter. Those come in real handy for checking bad caps for leakage. Capacitors will gain charge over time if they don't have a bleed off resistor. It comes from EM fields and static electrical charge that's present in dry air. As for dissolving that glue, I'd suggest MEK. I haven't found an adhesive it can't dissolve so far. Of course it dissolves other things too so you have to be careful with it. Great repair though...
I plan to get a true ESR meter at some point. I have one on my watch list which does ESR and a bunch of other tests. I will try the M.E.K solvent next time I need to unglue some caps, great tip thanks!
Check out the 5 transistor esr meter from the EEVblog forum. I plan on building that instead of buying one. For now I use the freq. gen and a scope to look for high esr. It would be nice to have one item to pull out to do so though! In any case, These HK Amp have crap caps in them....that is a given...if you don't recognize the cap brand....replace it if you like the item your are working on. If you want to do more, I would have checked the test point voltages for the caps or where they connect to, to check for the proper voltage choice. If they are already using no name caps, then there is likelyhood that they are also likely going under voltage also.
I try to find ways of confusing the automatic copyright maffia from getting a hit on my video :) but this did get a hit because of the christmas music, bastards.
I've got every receiver I've purchased since 1993. All working flawlessly. My secret (I guess) is don't drop it and keep the top open for ventilation. Strange how that Cap blew. The "X" scribed on the top is supposed to open and allow them to vent. I'd say heat did those caps in. The bulging is from the liquid inside being overheated and expanding. I've seen issues like that on boards that were overheated during the soldering process. Those were SMD lytic caps going though a reflow oven.
I am currently listening to this through one that looks identical except it has 7 channels and according to specs should have either 65 or 75WPC if I recall correctly. Found it in trash a few years ago and works fine with digital inputs, but if I hook it up to any analog source then it will sound very distorted, which I bet means bad caps. Also when searching up some reviews it seems like it is normal for these things to fail after a short time. Really sad how you are lucky to have it working after warranty expires when most of my vintage gear still works fine today inculding even a few tube radios from the 40s...
Seemed a bit overkill on the caps... these pre-HDMI AV receivers aren't worth much any more and it seems HK had gone down the Chinese outsourcing route by 2005. I think I'd have done enough to get the thing going and forgot about it. But liked the diagnostics.
No, the advantage to this particular model is that it has preamplifier outputs for each channel. You can add any amp you want after. It has full control over the sound for each channel. A real actual control. It also has optical input for full true 5.1 sound.
I did the same one a few years back, main filter caps all dead, 2 power transistors dead. Replaced all of them still nothing... on the power board "replace with same type fusible resistor" Ah! no power to the input selector. It works for years know but it not great. It looks nice ,it sounds mwa...
I've repaired a Harman Kardon AVR255, that had FL channel shorted output, and its working now. But the FR channel does a swiching noise when selecting input souces or shutting down the unit. Could you help on how to solve this?
I have an interesting question for you if you wouldn't mind helping me out. My Panasonic surround receiver died after 20+ yrs of service. I had everything from a 8 track to a blueray player looked up to it. To try to stay with that tradition I've found a Marantz SR4002 and a Harman Kardon AVR 254 surround receiver. I'm having the hardest time choosing between the two. Which would you choose please?
I have this same Harmon Kardon Stereo. Mine is about 10 years old. I have the same problem. Stereo turns on, but no audio out. It was working until a few days ago. I'm not as much an expert with electronics as you are, but I do build and fly quadcopters. ;) If I screw with it for a half hour, it will finally come on. I think it's a switch issue but this thing looks like a nightmare to me to work on..
I have this receiver, I recapped the whole thing (every board) it took me about 3 months to fully complete I love this thing but it's ashame harman kardon doesn't make receivers anymore
Hi there I have a Yamaha RXV 3900 and it was working fine till a week back. The problem I am facing is when I switch the power button it goes into safe mode a clicks off. I did try that a few times got the power stable but there is no sound coming from the center channel rest all channels are working fine. I also tried the pre out for center n it was working fine but when I connect the speaker directly to the center there is no sound. What can be the problem. Would really appreciate your guidance here. Thanks. Rgds Dave.
Hello Sir I want to convert my Harman Kardon avr 265, 7+1 amplifier to a 2 channel stereo amplifier, is this possible ? if so, what kind of path should I follow?
Some glues holding components on go brown and conductive with age and cause shorts and bulging electrolytic capacitors. It needs to be all scraped off or you'll have the same problem at switch on. I'm working on a D class car amplifier with this problem right now.
Yess, really painful to fix classic audio amps also too sensitive, needs a baby care you can't crank it up the problems will multiply just for soft music classical or jazz.. anyway nice video thanks
Buenos días, mí Harman Kardon cuando pierde la alimentación (220V) se borran todas configuraciones. Tiene alguna pila tipo botón para mantener las configuraciones como los ordenadores?. Gracias por vuestra atención
I have a AVR-154 that intermittently goes into standby on its own or won't come out of it and has a flickering led. I'll have to see if something similar is going on.
I have an AVR 7300, light is orange, but whenever I turn it on the relays makes a click noise and it turns off again. There is a small flash of light in the volume knob, but only for a second. Do you have any idea of what it might be? I've checked most of the fuses, it seems to receive power just fine. Thanks
I have a 347 model and right next to the power transformer there is one large cap glued to the board but i cant get a number off of it.I was wondering since you work on these items if you knew what it was and where to purchase these from
I have the avr 132, but now it doesn't turn on anymore. If powered on, the blue led will light, then after a couple of seconds, it turns to orange. I can't hear any click if i try to power it on. It just stays on standby mode. Is it the standby module that's broken?
I find certain models are tough to find a manual for free. Sometimes I get lucky on a google search. Seems to depend on the popularity of the model for repairing. I would really be surprised though if yours isn't just bad capacitors as well, I mean from what I found it seems to be common issue with Harmon during this era.
Hey wayback great video I have an issue with a harman hk3380 where it turns on normally (blue light) but there is no display it is just black. Any ideas of what it could be ? Thanks !
Sir, I have avr347 in which the problem is coming in that as I turn it on from the back, the Orange light comes in it. When the standby peer is pressed he becomes poor but nothing does not sound like it If the display comes then what can be folded, nothing is happening in it 10 seconds later it gets back orange when the first time we were on it, the sound of the relay was coming, it is not even coming
Hi, I have a rx-v3900 yamaha turn on ok but the symptom is that when turning up the volume it goes off Where do you suggest that may be the problem? Thank you
Hey Wayback TECH. How much did this overhaul cost you? I am not savvy in working on electronics. I have a Sony STR-DN850 that just stopped working as your receiver did. My receiver will stay in standby. When I try to turn on it try’s to but the lcd display does not come on and goes straight back to standby. I really would like mine repaired it’s been great. I could always have Sony repair it but was wondering if you repair receivers for other people? I really need my receiver I use it for my turntable and home stereo system. No video just music. Please message me back. Thanks.
My receiver only stays on for 15 minutes then it will just turn off automatically m. What capacitor would it most likely be, please? Or is it something else?
hi I have AVR254 and its not response to the remote control and there no response to the front panel just the LCD in DVD mode and I can't change the mode there no any operation I replace the the big caps with the same type and there is no operation still and I did a reset by pressing the OK and still can you help me ...thanks
Lol "I've never heard of that brand before and that's probably the whole problem". Btw won't the towel on the bottom have chances of causing static damage.
i have a avr 3550 same problem.but when i switch on avr indication light is green(switch on mood) and no any power transfer to main board.no any light or signal in display.what is the problem.how can i fix it.please help me...
Hi sir iam using harman/kardon AVR 132 but issue 1 minutes power on and display on after off and display no song what's problem sir this is my humble request
Hi, I have the same symptoms in the Harman Kardon AVR 145. After checking, I discovered that no voltage reaches the main transformer. Anyone have any idea where the problem may be? thanks
WaybackTECH No problem. What do you think about this receiver, is it yours? Is it good for being from 2005? I think that it's quite good, but hey, what do i know about receivers.
Foreigner037 No, this belongs to a friend that really loves this receiver so that is why I did a recap on it. I think this receiver is better than the Pioneer VSX-820K that I repaired a couple years ago, but for sound and build quality, I don't think it holds a candle to the older 90's and prior receivers
I have a Marantz sr-8002 all capacitors are KOSHIN and a lot of them is bad In the power regulator board is half KOSHIN capacitors bad, a lot of KOSHIN needs to remove
40WPC because all of these newer AVRs are designed to work with a powered sub. Most of an amplifier's power goes into the low-end of the spectrum. Another tell-tale sign that this is a modern unit, aside from the cheapie capacitors used, is the dinky little power transformer. Those tend to fail by way of an internal fusable link that opens up.
ngtflyer makes me wish didn't give away my sony str da1es. only 90 wpc but it got loud with lots of inputs and built like a friggin tank weighing 35 or so pounds. it was made in 2002 i believe so no HDMI, good receivers if you can find one real cheap
The Bigman Says the 40 watts is a rating with all 6 channels driven. Most companies give the wattage ratings with 1 or 2 channels driven but when all channels are driven they drop huge. Harman Kardon gives the real power output instead of inflated numbers.
Going through the comments and it's really apparent that Harman Kardon isn't what they used to be.
The only time that I have ever got capacitors that still had a 16v charge on them came from a seller on eBay and they were supposed to be new! The seller refunded me my money and I purchased something else from the same seller which turned up new. Those big brown capacitors almost look like the bad ones that I got...
Thank you a lot sir! I just got an H/K AVR-130 with a similar problem and now have an idea where to start the search for the culprit.
Your post inspired me to fix my AVR 135. Exactly same issue. It works like a charm now )). Thanks man. Great post
Were same amps stand by issue. what is the parts you replace?
Sir you really helped me a lot with this video! I have the AVR635 and it will not turn on. I will now go home and troubleshoot while watching your video on my iPad and will let you know what I come up with. :) Thanks so much
David Sims ĺ
Did it work? I also have the 635
One of the things that you might consider getting is an ESR meter. Those come in real handy for checking bad caps for leakage. Capacitors will gain charge over time if they don't have a bleed off resistor. It comes from EM fields and static electrical charge that's present in dry air. As for dissolving that glue, I'd suggest MEK. I haven't found an adhesive it can't dissolve so far. Of course it dissolves other things too so you have to be careful with it. Great repair though...
I plan to get a true ESR meter at some point. I have one on my watch list which does ESR and a bunch of other tests. I will try the M.E.K solvent next time I need to unglue some caps, great tip thanks!
Check out the 5 transistor esr meter from the EEVblog forum. I plan on building that instead of buying one. For now I use the freq. gen and a scope to look for high esr. It would be nice to have one item to pull out to do so though! In any case, These HK Amp have crap caps in them....that is a given...if you don't recognize the cap brand....replace it if you like the item your are working on. If you want to do more, I would have checked the test point voltages for the caps or where they connect to, to check for the proper voltage choice. If they are already using no name caps, then there is likelyhood that they are also likely going under voltage also.
good to see you have not been controlled by the fear for the copyright-gestapo yet..... testing audio equipment with actual music. nice!
I try to find ways of confusing the automatic copyright maffia from getting a hit on my video :) but this did get a hit because of the christmas music, bastards.
I've got every receiver I've purchased since 1993. All working flawlessly. My secret (I guess) is don't drop it and keep the top open for ventilation. Strange how that Cap blew. The "X" scribed on the top is supposed to open and allow them to vent. I'd say heat did those caps in. The bulging is from the liquid inside being overheated and expanding. I've seen issues like that on boards that were overheated during the soldering process. Those were SMD lytic caps going though a reflow oven.
I am currently listening to this through one that looks identical except it has 7 channels and according to specs should have either 65 or 75WPC if I recall correctly. Found it in trash a few years ago and works fine with digital inputs, but if I hook it up to any analog source then it will sound very distorted, which I bet means bad caps.
Also when searching up some reviews it seems like it is normal for these things to fail after a short time. Really sad how you are lucky to have it working after warranty expires when most of my vintage gear still works fine today inculding even a few tube radios from the 40s...
Koshin Caps = Designed for Obsolescence!
Nice Vid and about to tackle my AVR 240 w/same symptom...
Well done. I am now repairing an AVR 330 with all main caps bulged, although esr meter shows them as being good. Koshin.. huh.
"Koshin"......"Caution" YIKES!
O.M.G. 😂, he said"⚡ a little bit of 💩". 😆🤣🤣
Seemed a bit overkill on the caps... these pre-HDMI AV receivers aren't worth much any more and it seems HK had gone down the Chinese outsourcing route by 2005. I think I'd have done enough to get the thing going and forgot about it. But liked the diagnostics.
No, the advantage to this particular model is that it has preamplifier outputs for each channel. You can add any amp you want after. It has full control over the sound for each channel. A real actual control. It also has optical input for full true 5.1 sound.
Jason james I'm
Old things are every work worth...because, the modern types of this, won´t live too much.
Harman Kardon = Hong Kong. This thing is junk, it's nothing like the original HK equipment that was built to a specification and not a price.
I did the same one a few years back, main filter caps all dead, 2 power transistors dead. Replaced all of them still nothing... on the power board "replace with same type fusible resistor" Ah! no power to the input selector. It works for years know but it not great. It looks nice ,it sounds mwa...
I've repaired a Harman Kardon AVR255, that had FL channel shorted output, and its working now. But the FR channel does a swiching noise when selecting input souces or shutting down the unit. Could you help on how to solve this?
New subscriber and I’m addicted to ur repair vids!!! Nice work...
I have an interesting question for you if you wouldn't mind helping me out. My Panasonic surround receiver died after 20+ yrs of service. I had everything from a 8 track to a blueray player looked up to it. To try to stay with that tradition I've found a Marantz SR4002 and a Harman Kardon AVR 254 surround receiver. I'm having the hardest time choosing between the two. Which would you choose please?
I wonder if it went like this due to over heating and not enough air on top my denon avr gets plenty air but still gets warm. ?
I have this same Harmon Kardon Stereo. Mine is about 10 years old. I have the same problem. Stereo turns on, but no audio out. It was working until a few days ago. I'm not as much an expert with electronics as you are, but I do build and fly quadcopters. ;) If I screw with it for a half hour, it will finally come on. I think it's a switch issue but this thing looks like a nightmare to me to work on..
Famous last words: had a little bit a spark, I jumped and a little poo came out.
I have this receiver, I recapped the whole thing (every board) it took me about 3 months to fully complete I love this thing but it's ashame harman kardon doesn't make receivers anymore
Hi there I have a Yamaha RXV 3900 and it was working fine till a week back. The problem I am facing is when I switch the power button it goes into safe mode a clicks off. I did try that a few times got the power stable but there is no sound coming from the center channel rest all channels are working fine. I also tried the pre out for center n it was working fine but when I connect the speaker directly to the center there is no sound. What can be the problem. Would really appreciate your guidance here. Thanks. Rgds Dave.
good work
Hello Sir
I want to convert my Harman Kardon avr 265, 7+1 amplifier to a 2 channel stereo amplifier, is this possible ? if so, what kind of path should I follow?
Some glues holding components on go brown and conductive with age and cause shorts and bulging electrolytic capacitors. It needs to be all scraped off or you'll have the same problem at switch on. I'm working on a D class car amplifier with this problem right now.
wery wery nice
Yess, really painful to fix classic audio amps also too sensitive, needs a baby care you can't crank it up the problems will multiply just for soft music classical or jazz.. anyway nice video thanks
Buenos días, mí Harman Kardon cuando pierde la alimentación (220V) se borran todas configuraciones. Tiene alguna pila tipo botón para mantener las configuraciones como los ordenadores?. Gracias por vuestra atención
I have a AVR-154 that intermittently goes into standby on its own or won't come out of it and has a flickering led. I'll have to see if something similar is going on.
I have an AVR 7300, light is orange, but whenever I turn it on the relays makes a click noise and it turns off again. There is a small flash of light in the volume knob, but only for a second. Do you have any idea of what it might be? I've checked most of the fuses, it seems to receive power just fine. Thanks
Oh ok. I will look into it. Thanks
I have a 347 model and right next to the power transformer there is one large cap glued to the board but i cant get a number off of it.I was wondering since you work on these items if you knew what it was and where to purchase these from
I have the avr 132, but now it doesn't turn on anymore. If powered on, the blue led will light, then after a couple of seconds, it turns to orange. I can't hear any click if i try to power it on. It just stays on standby mode. Is it the standby module that's broken?
Was wondering what did your meter read on open circuit and what was the exact ohm for the transistor
Hey I have got the same symptoms on the AVR 138. However I have +5V StandBy voltage.. DO you know where to get a service manual?
I find certain models are tough to find a manual for free. Sometimes I get lucky on a google search. Seems to depend on the popularity of the model for repairing. I would really be surprised though if yours isn't just bad capacitors as well, I mean from what I found it seems to be common issue with Harmon during this era.
Hey wayback great video I have an issue with a harman hk3380 where it turns on normally (blue light) but there is no display it is just black. Any ideas of what it could be ? Thanks !
Sir, I have avr347 in which the problem is coming in that as I turn it on from the back, the Orange light comes in it. When the standby peer is pressed he becomes poor but nothing does not sound like it If the display comes then what can be folded, nothing is happening in it 10 seconds later it gets back orange when the first time we were on it, the sound of the relay was coming, it is not even coming
Hi, I have a rx-v3900 yamaha
turn on ok
but the symptom is that when turning up the volume it goes off
Where do you suggest that may be the problem?
Thank you
Hey Wayback TECH. How much did this overhaul cost you? I am not savvy in working on electronics. I have a Sony STR-DN850 that just stopped working as your receiver did. My receiver will stay in standby. When I try to turn on it try’s to but the lcd display does not come on and goes straight back to standby. I really would like mine repaired it’s been great. I could always have Sony repair it but was wondering if you repair receivers for other people? I really need my receiver I use it for my turntable and home stereo system. No video just music. Please message me back. Thanks.
Did you change the capacitors in the 6 channels at the main board? they are at least 6 for channel
My receiver only stays on for 15 minutes then it will just turn off automatically m. What capacitor would it most likely be, please? Or is it something else?
I have same problm in my harman avr 145 pla help me brother how can i fix this
hi I have AVR254 and its not response to the remote control and there no response to the front panel just the LCD in DVD mode and I can't change the mode there no any operation I replace the the big caps with the same type and there is no operation still and I did a reset by pressing the OK and still can you help me ...thanks
My AVR 132's center channel isn't working. What could be the problem?
Lol "I've never heard of that brand before and that's probably the whole problem". Btw won't the towel on the bottom have chances of causing static damage.
i have a avr 3550 same problem.but when i switch on avr indication light is green(switch on mood) and no any power transfer to main board.no any light or signal in display.what is the problem.how can i fix it.please help me...
How about no sound but have power?
Nice repair!
Can you tell me input voltage and output voltage of this transformers? This is the harman kardon Avr on 240 model. (UL VER :CLT 5J 033 zu)
the big caps your swooping out are they the DC blocking caps for the speakers?
No the main rectifier caps for filtering.
This avr looks cool.. buts its functions are too low... i wish my avr did have this look with those functions.. its my dream though😍😍
Hi sir iam using harman/kardon AVR 132 but issue 1 minutes power on and display on after off and display no song what's problem sir this is my humble request
Hi, I have the same symptoms in the Harman Kardon AVR 145.
After checking, I discovered that no voltage reaches the main transformer.
Anyone have any idea where the problem may be?
thanks
I have h/k avr 70, power supply is ok, display is working but not sound, audio not out please help me
Please share Harman Kardon 132 tuner problem
Hi!nice job man do you remember the value(ohms)of the resistor you have replace??I have the same amp and i think i have the same problem.
How to fix this no power 15 v
Sir my avr 245 have a problem.its working 4 seconds then protect.help sir
I have the same problem with harman kardon model 330.
Problem with power😔😔😔
The only thing you have to do stop the copyright strikes could you play too much music
Wow,that’s a lot of stuff jammed in a box! Not particularly maintenance friendly.
Hellow!
My H/K avr 130 goes to sleep mode after 10-15 min,any idea?
Have you been able to solve it and how
Bro almost training only display not working bro why problem
HI WAY BACK TECH >>>>>>> Hey can you help me bud with my avr 135 pls if its all right yo. How do you fix the tuner buttons yo
from scanterbury
I've notice you have a typo in the title as it should be Harman Kardon.
Your right, didn't catch that. Thanks.
WaybackTECH No problem. What do you think about this receiver, is it yours? Is it good for being from 2005? I think that it's quite good, but hey, what do i know about receivers.
Foreigner037
No, this belongs to a friend that really loves this receiver so that is why I did a recap on it. I think this receiver is better than the Pioneer VSX-820K that I repaired a couple years ago, but for sound and build quality, I don't think it holds a candle to the older 90's and prior receivers
WaybackTECH
It makes sense since everything pretty much is going the same route.
This video makes me mis Maxxarcade
Tengo el uvr.130..se apago..y lo vendo...como esta....en cuanto lo puedo vender...alguien..lo repara..y le sacara buen provecho...esta impecable...
You would think there would be an access panel on the bottom
This way we service centers have to charge $125 labor just to replace a part that costs $5.00.
I have a Marantz sr-8002
all capacitors are KOSHIN and a lot of them is bad
In the power regulator board is half KOSHIN capacitors bad,
a lot of KOSHIN needs to remove
hi i have AVR 135 STAND BY PROBE LAM MORE TIMES ST BY PRESS ON BUT 10 MIN SAME PROBE LAM
It's not a "stereo" receiver.
damn only 40wpc? needs some efficient speakers
40WPC because all of these newer AVRs are designed to work with a powered sub. Most of an amplifier's power goes into the low-end of the spectrum.
Another tell-tale sign that this is a modern unit, aside from the cheapie capacitors used, is the dinky little power transformer. Those tend to fail by way of an internal fusable link that opens up.
ngtflyer makes me wish didn't give away my sony str da1es. only 90 wpc but it got loud with lots of inputs and built like a friggin tank weighing 35 or so pounds. it was made in 2002 i believe so no HDMI, good receivers if you can find one real cheap
Where do you buy your caps? Thanks.
Usually Mouser Electronics unless they don't have in stock what I need, then I might just hit ebay.
Sir my hk no proper isolation
can you get 1000watt total rms for home units
Who knows? I think you can but I'm not sure.
Mine has a raspy left channel
Hlo bro Sam problem 7.1 bro solution bro
Preciz munka.
Avr 347 stanby problem
Suprized it only puts out 40 per channel, seing the transformer and caps are decent size, but then again class D chips usually are like this.
The Bigman Says the 40 watts is a rating with all 6 channels driven. Most companies give the wattage ratings with 1 or 2 channels driven but when all channels are driven they drop huge. Harman Kardon gives the real power output instead of inflated numbers.
Koshin is commonly seen in Chinese devices
me
view cap is naze
These amps absolute junk. I threw two . Cheaper to fix my vintage sansui and pioneer
Please my Harman kardon amplifier avr 135 is not talking again but all is well but not talking what will I do