ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
After having my BeoMaster 8000 apart to re-cap the power-supply board and both output boards (with some drama along the way), my beomaster is now showing some odd behavior.
Specifically, it will no longer remember radio presets or the volume presets for each source. If I try to store a station or volume setting, everything appears to work properly. Specifically, the "P" flashes for a preset and and it flashes the preset I select, then displays "P1" (or whichever number I choose) in the display. That is, until I press the preset button, change the source, or turn the unit off. Once I do any of those things, the radio station preset and/or the volume preset is clearly not changed.
Before I just accept that this sucks, I was hoping that someone might point me in the right direction.
Tom
Was the memory function working good before the recap? Have you monitored the voltage, ground and signals of the memory IC (9IC6)?
-sonavor
You may have one of those micro-controller PCBs with defective vias.
Any photos?
Jacques
Sorry for not getting back sooner, it's been a madhouse around here lately. The memory function was working before the unit died when a power supply board capacitor went south. I cannot say if it was working post-recap but pre-shortout, though.
As for photos, I don't have any recent ones, but the CPU board is green. Here are the best I can dig up:
And another:
Hey Tom!
The CPU is the one in the tin can! This is a series 2 module which doesn't have the ground via problems. It is very difficult to open up, and unless you are a trained hobbyist (my little finger told me you are not quite there yet!) I'd advise you against doing so. The memory chip is in the can, and can fail. But it can be many things... Perhaps a bad contact somewhere?
What you show is the PSU/IR board!!
CPU = central processing unit
PSU = power supply unit
Thanks, Jaques. I realized that one of the photos was the PSU, but I had an issue removing it on a mobile device.
i have no intentions of going into the CPU itself, but I have already replaced the red caps in those photos (they were old ones).