oh noooo......

[Pieoftheday]

morning all, ive seem to have a poorly amp :( i normally leave my amp-marantz pm8003 in standby but last night i switched it off proper, this morning i swithed on ,the little red light came on and after a few seconds it should turn blue, but no, there was a little click and the standby light is just flashing, the manual says its either the protection circuit or the main fuse inside the amp has blown. ive unplugged and swithed on/off with no luck so im guessing its the main fuse, does anyone know if this is an easy fix ? or is it a visit to my local dealer ?:violin: thanks jim

[Themis]

Hi Jim,

unfortunately your amp doesn't seem to have the fuse as a user serviceable part (that is, accessible from the outside without opening the amp).
If your amp is still under guarantee, you'll need to bring it to your local dealer, I'm afraid. :(

[Pieoftheday]

hi Dimitri, well thats a bugger and no mistake!! thanks for letting me know though, my local dealer eric wiley, castleford is pretty helpful so ill just have to hope it isnt a pricey repair,its out of warranty n'all, double bugger !! thanks again ,jim

[jasonC]

if it is out of warranty you can replace the fuse yourself.
it is pretty easy to do,well my last amp fuse was easy to replace.
that amp being a Cambridge audio
a picture of the inside on here,sure someone can help you
your local dealer if it is the fuse i guess could do the job.

[Pieoftheday]

what with work and a holiday i didnt get my amp for repair until two week ago,just picked it up and its back where it belongs:) it wasnt a fuse after all, the invoice says,, faulty component in output stage, re soldered many suspect dry joints ?cleaned and lubed pots and switches, thats £112 to you sir ..... :eek: are dry joints a common problem?:scratch:

[gariusmacus]

. :eek: are dry joints a common problem?:scratch:

They are in my Knees :lol:

but seriously They shouldn't be there caused by poor soldering in manufacture

[Pieoftheday]

hi gary, the amp seems so well built as well, you'd think £600 would get some decent solder !!!

[StanleyB]

Heat can build up at a soldering junction to such an extent that the solder starts to get soft. If that happens often enough the solder will start separating and cause a dry joint. The problem can affect any sort of soldered equipment, irrespective of cost. In the old days it was more common to use a wire wound method, especially in valve equipment.

[Firebottle]

I repaired an amplifier that had a line of dry joints along the line of connections to the heat sink.
The repeated heat cycle of expansion/contraction of the heat sink, albeit very small, eventually caused the development of the dry joints.

Not a lot an be done in that case, just re-solder every few years.

:cool: Alan

[Pieoftheday]

thanks chaps, it helps to know its effectively just wear n tear:interesting:. its just good to be able to play some tunes again:champagne:

[synsei]

I repaired an amplifier that had a line of dry joints along the line of connections to the heat sink.
The repeated heat cycle of expansion/contraction of the heat sink, albeit very small, eventually caused the development of the dry joints.

Not a lot an be done in that case, just re-solder every few years.

Alan

Which is why a I keep my equipment on 24/7. Awaiting copious bucket loads of warm flak from the green lobby... :)