Posts by jonbr (archived2)
12 total posts11 results
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 13:19Just a thought. When you LOAD a CD, is it supposed to start playing automatically, or do you need to touch CD to make it play? I've just reviewed the instructions, and it seems that LOAD on its own won't make it play. It…
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 12:44Too late, Martin, I set the R3105+R3106 measurement to 1K per the manual and got 21mV across R3102 (previously it was 48mV). Unit is playing better now, but is unable to read Track 1 when a disk is first loaded - but aft…
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 11:31Further testing shows it is behaving oddly. When loading a CD it fails to read track 1, but select 2 and it will play. Then, select 1 again and it plays that! How come it can't play Track 1 when loaded, but a skip forwar…
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 11:27Thanks Keith, but it looks like this version (note twin potentiometers). Should I up the voltage to 50mV..? Or wait until the 33uF cap I ordered turns up, fit that, then adjust?
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 10:47In the spirit of impatience, I set the potentiometer to 1K Ohm and started the player. I measured 21mV across R3102 yet the unit is playing. So I have to assume that the 1K setting (R3105+R3106) is a safe starting point …
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 10:23Found the servo PCB in the 9500 service manual on page 2-13. It's called "Board 30" and it matches mine more or less exactly. 🙂 Now to do some tests.... R3105+R3106 measures .51K Ohm. It's supposed to be 1K according to…
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 09:54This doesn't look like the correct place to measure the 50mv for the laser. Although if it was, I'd expect a meter to show ~75mv as the average.
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 09:52Sorry for the multiple posts, the forum only allows me to attach one picture to any single post. So, I attached a scope to the measurement points and got the unit to play a CD (seems to like working on its side for some …
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 6, 2020 09:49I assume you mean the points marked on the attached picture.
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 4, 2020 17:12Yeah.. I'm thinking that I don't want to go there if it's not necessary. But I'm disappointed the cap swap hasn't cured it. So many of them seem to have been fixed by virtue of this one component.. not mine though! Unles…
Beocenter 9000 CD problem
in Imported Content (Unmapped) · Jan 4, 2020 16:35Hi First post here, after reviewing many, many threads about the CD4 mechanism and board used in the Beocenter 9000. I have the usual problem of disk rejection, failing to play, etc, with the occasional play on really cl…