Repairing a Denon DMA-1560

[Rallen]

Hey there.

My father-in-law has given me the task of repairing his old Denon DMA 1560 amplifier which has stopped working.

It turns on just fine, but no sound is passing through no matter which input or output im using. One thing I have noticed is that it doesnt come with the regular "click" sound after turning on, that I'm used to from other amplifiers. Could this have something to do with the issue? Im thinking a broken relay, maybe?

Any ideas about what to check and how to proceed with the repairing procedure would be appreciated! 🙂

Merry christmas from Denmark!

 

[hg_mike]

Happy Christmas Rallen,

It is always best to follow a process of elimination, and try and narrow down the affected area. Plus start with the simplest possible root causes first.

You know that the amp turns on, so this eliminates a faulty power lead or fuse. I presume that you have tried using several different signal inputs, and checked that the mute button is not switched on.

Some amps have a relay that mutes the signal to the loudspeakers, so that you don't get a damaging "click" fed to the loudspeakers, when you turn the amp on.

Try using a different set of speakers, and leads, just to narrow down the fault to the amp, or the speakers.

If the fault is still located within the amp, the next simplest thing to check is if there are any fuses (internal or external) used by the amp to protect the speakers from too loud an output signal.

If you still have a problem, then the problem is probably internal to the amp. I googled the amp, and can see a service guide that may be helpful to you.

http://www.eserviceinfo.com/index.php?what=search2&searchstring=denon+pma+1560

Good luck. 🙂