Generic problem for all Receivers
Harman kardon avr7000
posted by BEERbrooklyn on Jan 29, 2008
i just picked 1 up.i have a problem with the dsp i believe. all channel work in analog format.when playing in digital or using a digital source only the front right dhannel plays.i heard there is a issue with dried uop cap. on the dsp.do you have any experienc witih the avr7000? also i nned a remote that would work with it .that would beable to bring up the osd.any advice?By the way thanks 4 accepting me as buddy. I'm good with car audio and i'm a A+ tech.
BEERbrooklyn(chris)
BEERbrooklyn(chris)
Comment by BEERbrooklyn, posted on Jan 29, 2008
CAN I TEST THE CAPS WHILE THEY ARE STILL ON THE BOARD?I SHOULD GET INFITE READING BOTH WAYS CORRECT?
IF ITS THE PROCESSOR AM I LOOKING AT ALOT OF MONEY? HOW MUCH WOULD SOME1 CHARGE TO TROUBLE SOOT CAN U GIVE ME AN IDEA WHAT WOULD BE FAIR PRICE? CAPS AND RES, REPAIR?$ THANK YO 4 UR TIME
IF ITS THE PROCESSOR AM I LOOKING AT ALOT OF MONEY? HOW MUCH WOULD SOME1 CHARGE TO TROUBLE SOOT CAN U GIVE ME AN IDEA WHAT WOULD BE FAIR PRICE? CAPS AND RES, REPAIR?$ THANK YO 4 UR TIME
Comment by BEERbrooklyn, posted on Jan 29, 2008
I READ AN ARTICLE ON THE 10UF CAP DRYING UP ONTHE DSP..BUT I STIIL GETTING 1 CHANNEL SO THAT MIGHT MEAN MAYBE 1 CAP IS STILL GOOD AON THE 1 WORKING CHANNEL .AND THE OTHERE 1'S MIGHT BE DRIED UP.I HOPE THAT THE CASE, I'M A SELF TAUGGHT REPAIR MAN I GET MY KNOWLEDGE FROM PEOPLE LIKE YOU AND BOOKS. I BUILT A HOUSE ALARM IN H.S. COPPER CLAD BOARD AND EVERYTHING.I WAS ALWAYS ATRRACTED TO TECHNOLOGY THANKS FOR YOUR INPUT ONCE AGAIN.I.M IN NEW YORK,TOO BAD I COULDN'T SEND IT TO YOU.MY NAME IS CHRISZAMBROTTA AND I USE THAT FOR MY EMAIL AT YAHOO.
Comment by BEERbrooklyn, posted on Feb 10, 2008
its in the shop now ,i relayed your info.i need a service manual ,would you havt the schemtics pdf. for the avr 7000.it would be much appreciated.he's kind of stubborn when i gave him your advice,wat would someone charge me 2do a jod like that?i wish u would have replied sooner i would of took it on.please respond or send me schmetic my name is chriszambrotta n i live on yahoo street.get it? got it? thank you.i 'm a A
= tech if you ever need my advice
= tech if you ever need my advice
Comment by BEERbrooklyn, posted on Feb 26, 2008
hey guys its stilkl in the shop ,so far all the cap. on dsp board had to be replaced something like 30 of them.If that is the only problem what would be a fair price for that job? My shop i s asking for 150.Keep in mind i supplied him with all of your data up front,and i bought him a copy of service manual.Hopefully that is the only thing wrong.Now 4 the big question how do i prevent this from occuring again? and why this it happed (dried cap.)in teh 1st place.Improper cooling?Does heat bring this on? or is a circuitry problem.Dont want to be back in the shop.Thank yo guys for the time you put in fior me',burp.burp.:}
Best Solution
posted on Jan 29, 2008
GuruHi Chris,
I don't work on many car amps anymore although have in the past. ( Just not something I care much for, You know we all have our favorites). The caps being bad is definally a stong possibi;ity as I find this same problem in surround sound home systems, but also find that if there are bad caps, I normally find resistors in the cap area may also be bad, which I would suggest you also check that possibility. I sell remotes, but don't know if they would work with your system. I'de suggest searching on remote web sights. ( then you'de be assured the remote should work ).
Thanks also to you for requesting me as a buddie and should I come up with a problem I can't figure out, rest assured, I'll be knocking on your door.
Ed
NC Electronic
Mills, Wyoming
I don't work on many car amps anymore although have in the past. ( Just not something I care much for, You know we all have our favorites). The caps being bad is definally a stong possibi;ity as I find this same problem in surround sound home systems, but also find that if there are bad caps, I normally find resistors in the cap area may also be bad, which I would suggest you also check that possibility. I sell remotes, but don't know if they would work with your system. I'de suggest searching on remote web sights. ( then you'de be assured the remote should work ).
Thanks also to you for requesting me as a buddie and should I come up with a problem I can't figure out, rest assured, I'll be knocking on your door.
Ed
NC Electronic
Mills, Wyoming
Comment by wyoed1, posted on Jan 29, 2008
Hi Chris,
The caps you are needing to check are of a high value ( lets guess at 22,000 mfd) so checking them in line is about impossible. When checking a cap with a vom meter ( I assume this is what you are using ), check the cap in the resistance ( ohm ) test. The capacitor, if it's good should charge ( slowly for a higher value ) but it should charge unless you reverse the leads and it will discharge and then recharge in the opposite polarity. I normally have a small supply of all capacitors on hand and don't even check them ( I just change them ). It's time verses money. As for the cost of a processor or a fair price to repair, it defiantly depends on the part of the country one is in to determine a fair price. At our shop we have a flat rate on audio equipment and that is normally at 70 dollars plus parts ( depending on how bad the board might be burned ), but one might want to send it in to the manufacture and they would flat fee and also flat fee parts ( probably a better price than most shops ).
I really couldn't even give you an honest answer to how much a total price would be for your amp not knowing how badly the inners might be damaged. ( Possible bad processor, transistors, diodes capacitors, etc )
Sorry I can't be more precise.
Ed
NC Electronic
Mills, Wyoming
The caps you are needing to check are of a high value ( lets guess at 22,000 mfd) so checking them in line is about impossible. When checking a cap with a vom meter ( I assume this is what you are using ), check the cap in the resistance ( ohm ) test. The capacitor, if it's good should charge ( slowly for a higher value ) but it should charge unless you reverse the leads and it will discharge and then recharge in the opposite polarity. I normally have a small supply of all capacitors on hand and don't even check them ( I just change them ). It's time verses money. As for the cost of a processor or a fair price to repair, it defiantly depends on the part of the country one is in to determine a fair price. At our shop we have a flat rate on audio equipment and that is normally at 70 dollars plus parts ( depending on how bad the board might be burned ), but one might want to send it in to the manufacture and they would flat fee and also flat fee parts ( probably a better price than most shops ).
I really couldn't even give you an honest answer to how much a total price would be for your amp not knowing how badly the inners might be damaged. ( Possible bad processor, transistors, diodes capacitors, etc )
Sorry I can't be more precise.
Ed
NC Electronic
Mills, Wyoming
Comment by wyoed1, posted on Jan 29, 2008
The cap you are speaking of is a low value so you may want to just change it as the cost will be low. The Caps I am speaking of are much bigger and what I have found to be more of a problem than the small ones. If you see a cap that has a swollen top, is leaking or has the heat shrink around it pulled down ( from extensive heat ) be assured it is bad. I would also think you need to consider a possible bad processor or transistor for your problem.
Sorry, I can't solicit jobs on FitYa as you know, but am happy to help any way I can.
Ed
NC Electronic
Mills, Wyoming
Sorry, I can't solicit jobs on FitYa as you know, but am happy to help any way I can.
Ed
NC Electronic
Mills, Wyoming
Solution #2
posted on Feb 08, 2008
ApprenticeHi,
OK, now for the right answer! I just finished fixing one of these with similar problems, no surround, but stereo OK.
On the audio processing board and the DSP board and maybe the audio I/O board, every capacitor smaller that 47uF will probably be open. You can use an ESR meter in circuit to test them, but I got tired of that after about the 10 th one and just changed them all - no more problems.
Don't worry about the big capacitors.
Thanks.
Don
OK, now for the right answer! I just finished fixing one of these with similar problems, no surround, but stereo OK.
On the audio processing board and the DSP board and maybe the audio I/O board, every capacitor smaller that 47uF will probably be open. You can use an ESR meter in circuit to test them, but I got tired of that after about the 10 th one and just changed them all - no more problems.
Don't worry about the big capacitors.
Thanks.
Don
This Problem Also Relates To:
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Denon AVR-3805 7.1 Channels Receiver
Denon AVR-1508 7.1 Channels Receiver
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Denon DRA-37
Denon AVR-884 6.1 Channels Receiver
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