Question about Harman Kardon Audio Players & Recorders
Gentlemen, I am in a pickle,I have a problem that I hope you will be gracious enough to help with! I Purchased a Harman Kardon AVR75 on EBay,it did operate fairly normall when I received it,except for the audio cutting out at low levels. I decided to overhaul it due to the fact it had something spilled inside by the previous owner , the main transformer was rusted from it, Also it was loaded with dust. I discharged the whole system,desoldered & re-soldered the 4 main electrolytic caps.,removed and replaced the heat sink compound. I cleaned all the boards with contact cleaner . I just finished reassembling it. The pwr. button stays amber,the relay on the pwr. board clicks,and the pwr. button goes to red momentarily whenever any of the input buttons are pushed. I believe that since the whole system was de- energized the microprocessor has to be cleared or reset. Please help me to get the pwr. button Green again. God Bless W.G.D.
My guess is in the desoldering-resoldering process...try to get back to every resoldered part you did. Be sure you returned the connectors to their proper terminals.
If you can trace the output circuit before the protection circuitry...try to get a near zero voltage. Any DC voltage appearing will trigger the protection - thus indicates red.
what else did I miss?...yeah! goodluck!
Posted on Sep 25, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 30, 2012 | Harman Kardon Harman HK 990 Amplifier
Feb 20, 2012 | Harman Kardon Audio Players & Recorders
May 20, 2011 | Harman Kardon Audio Players & Recorders
Register and download the manual for free at retrevo.com
Mar 22, 2011 | Harman Kardon Audio Players & Recorders
Nov 26, 2010 | Harman Kardon SIGNATURE 2.1 Amplifier
Jan 02, 2010 | Harman Kardon Audio Players & Recorders
Nov 22, 2009 | Harman Kardon Audio Players & Recorders
137 people viewed this question
Usually answered in minutes!
Level 3 Expert
Level 2 Expert
Level 3 Expert