Hey guys so i got this unit and the thing has no sound whatsoever. No red lights on front the unit powers on and I can cycle through all the menus just like it is working normal. No sound out of any of the out puts on the back and the headphone jack is dead as well. Any Ideas on what is wrong with this unit and how to fix it.
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Re: Harmon Kardon AVR-247
Service manual:
"hThis file is downloadable free of charge: Get Manual"
You will have t o wait until you see GET MANUAL first before downloading.
So what kind of tolls do you have and how about your experience?
Have any good clear pictures of the outside and the in side of the unit?
History of the unit before it went out?Last edited by budm; 10-26-2016, 05:00 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!!
what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing... -
A Harman/Kardon AVR 645 repair has been a hobby of mine for the past several years. My latest attempt involved the purchase of a DOA unit for part swapping and testing. The original AVR would power up then shut down after a few seconds. I completely tore down both units, found a couple of bad components and reassembled one of them. Same issue, no speakers connected. After extensive research I found a repair document from Harman/Kardon that explains the protection circuit in fantastic detail and provides specific test points for each fault (power, DC detection, overload & power) and the voltage...06-17-2024, 11:43 AM -
Cant find what smd code Y0DVA.
sitting in Harman kardon onyx studio 7. Appreciate any help. -
Would I be able to swap a 0.27 Ohm Kx2 5W resistor for a 0.22 Ohm Jx2 5W resistor in a Harman/Kardon AVR? Cement type.
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Good day ladies and gentleman!
I am currently trying to repair a Grundig Vision 9 37 9880 T USB LCD TV for a friend that has a weird audio problem. Basically everything works fine except for the heavily distorted sound when the Subwoofer module is connected and there is a buzzing sound coming from the PSU PCB.
This seems to be a rather rare TV so there is not much prior on topic help to be found however a service manual is available at the usual sources (Electro Tanya i.e.).
I think the PSU buzzing comes from one of the coils near the bridge rectifier but...
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