I'm sure this is unrelated but I came back in and the radio was on , I dismissed it thinking I had forgot to turn it off when I left, then again last night I was woken up by AC-DC playing on planet rock , great tune but still a shock to be woken up by the amp turning itself on, it will be hard to find if it only happens every few days, I guess I shall leave it in standby with the keyboard unplugged for a few days and maybe look at replacing the 2 relays, does that seen sensible ?

jason 

Hi Jason,

Sorry to hear that!

I guess you will have to re-open the beast and check your solders on the tuner board, as well as the connectors. 😠

Replacing the relays, why?

There's could a fault within the processor board. You say you haven't replaced the cap inside. Sometimes, after a power cut (even the fraction of a second) the Beomaster can behave strangely. Just switch it off, wait 20 seconds (this is important not to damage speakers), then unplug it. 

A founding member and only seven posts? 😕

My Beomaster 8000 was giving me some fits with a channel dropping out. One difference in my case though, is that I would get the dropout on any of my input sources (not just the FM).  I tried a couple of different preamp boards and both experienced a dropout in different channels at some point. By that I mean the receiver would play for a while, then lose a channel. I was thinking the problem was a transistor on the preamp output, then an analog switch.  In the end the problem was a board connector issue.  I had resoldered all of the board connectors so it wasn't the board itself. My problem went away when I switched out the P21 and P15 board connectors.

-sonavor

Yes I don't know why it only shows 7 posts, I used to have a few hundred, granted I hadn't really been on beoworld much the last couple years since we had major building work going on

ive hard wired the 2 tuners boards and the cpu with the display board to eliminate the intermittent connections, a little time consuming but sorted the occasional flickering display.

yes tryed powering down a few times, I'm in the habit now of switching speaker switches off before unplugging .

its quite funny really having an amp turn itself on instead of stutting itself down, proof after years of storage that this baby wants to live!!

jason

Further investigation has proved helpful, only just finishing the cdx I found the same right channel is also missing there as before I had only finished the beocord 8004 which worked in both so I was concentrating on it been the timer board been at fault, so I checked the phono briefly and again no right channel, yippee I'm getting closer!!

from the service manual it seems ic202 on the preamp board pcb3 has all 3 inputs in common on the right channel

Sorry tuner board not timer board

Check the input level preset potentiometers. They are rarely used so will often oxidize.

Martin

Hi Martin, 

thankyou, yes I'm heading home now all excited and hopeful to give that a try, much better than trying to locate that chip and the presets on the pre-amp board are something I hadn't cleaned or looked at yet, strange thing when I first opened it and I'm pretty sure I was the first I noticed one of them was missing the rod (for lack of the correct name) so was going to look out for one just to make it complete.

ive also noticed the volume and station presets occasionally have changed , could that be related?

do you recommend unsoldering them and taking them apart somehow to clean them properly ?

Kind regards Jason