Roland Amp Satellite Speaker problem

[icantread]

Hi. I have a Roland Amp that consists of a sub-woofer and two satellite speakers. The latter have their own separate channels. Recently one of the speakers stopped functioning properly in so far as you can hardly hear a sound coming from that speaker. It is very faint. I know the speaker works as does the lead so I guess the circuit board is at fault? Any help would be appreciated .

Thanks

 

[Arouse1973]

Hello
We can help but it would be good if we could get hold of a circuit diagram and also some clear pictures of the PCB on both sides. What is the model number of the Amp.
Adam

 

[icantread]

Hi Adam, thanks for the reply it is appreciated. The amp is a Roland PM-30 I downloaded the manual which is too large to attach. I do attach the block diagram though, it might help?
I can take pictures of the board but it might be later in the week I'm afraid.

 

[Arouse1973]

Cool I'll have a look later.
Adam

 

[davenn]

Hi icantread
welcome to Electronics Point

do those 2 satellite speakers plug into those 2 x speaker out sockets on the diagram between the woofer out and phones ?

and I'm assuming, other than the woofer, they are the only speakers ?

Dave

 

[icantread]

Hi Dave, yes I think so. I am about to post some images of the board if I can., Files are quite large.
Dave/Adam

 

[icantread]

Cool I'll have a look later.
Adam

I put some pics up Adam. Any good?

 

[Arouse1973]

I can't see anything obvious, is it just one channel that has stopped working? I guess you tried the speaker in both sockets?
Adam

 

[icantread]

I can't see anything obvious, is it just one channel that has stopped working? I guess you tried the speaker in both sockets?
Adam

Yes speakers and cables are both working. It's the right channel. If I turn the voume up to max with just the right speaker connected you can hear some very faint noise.

 

[KrisBlueNZ]

Where's the rest of the circuit boards? On the other side of the brown divider in the last picture with the wires going through it. Where do they connect?

 

[Arouse1973]

Yes speakers and cables are both working. It's the right channel. If I turn the voume up to max with just the right speaker connected you can hear some very faint noise.

We could do with a couple of pictures of the main amp PCB now. Nice pictures like before of both sides.
Adam

 

[icantread]

Sorry for the delay guys. It's not the easiest thing to take pictures of without taking the boards out. I will try to post some this week.

Thanks again for your time