If you head over to PFM there are a couple of Repairers regularly posting. Arkless Electronics being one.bignige said:Hi all,
Anyone on here able to look at fixing a Sony amp -or any suggestions for someone who could have a look?
It's a Sony DA9000ES
This may be slightly differentnewlash09 said:any music kit service center should be able to sort it out. Too much of voodoo in our hobby. I recenty paid my local electrician the equivalent of 5 pounds to renew the voice coil of the burnt tweeter of my pmc 20.26 speakers. And when he was done, i measured the resistance of the renewed tweeter with the still intact tweeter, and they both measured exactly the same. I can only imagine what the cost of a new tweeter could be. So, please ask him to look around for any electrical work shop. Dont necessarily need a sony service centre to sort it out, where they will charge him a bomb, which as per them is just a fraction of the cost of the amp
Upto your in depth knowledge posts as everVladimir said:He should disconnect everything from the amp. No speaker wires, no cables except the power cord going in the mains.
1) If the error code 11 appears again when the amplifier is turned on or after 1h of idling, the amp has a failing component. Could be a simple fix for an experienced tech.
- measure DC offset on the terminals. Is it bigger than 25mV DC?
2) If no error appears, then it could mean the problem is elsewhere.
- there's a problem how the speakers are connected, arangement of terminals, out of phase, or bits of wire touching.
- the speakers that are connected are missmatched in impedance (never combine 4ohms and 8ohms).
- some of the speaker drivers have blown are shorted.
- speaker crossover component failed.
- also I'd test the amp with everything disconected, but attach headphones.