link

Excellent guess! But don’t wait for some expert answer, just try it! (:-) (…and report back here to aid future searchers, of course…:-)

?  I was looking for independent verification of the location, as my attempts at masking have failed so far:  one layer of black electrical tape; two layers of tape; a sandwich of tape-cotton-tape; aluminum foil and tape; a sandwich of tape-foil-tape. Note that the suspected area ‘wraps around’ a 90-degree angle to the bottom of the unit; I’ve masked both areas in my attempts, to no avail.  However, I’m stubborn and I’m also enjoying the learning process.  I promise to report back if I solve this.

Don't think so: the IR safety feature has its own receiver on PCB28, not PCB14.  Likewise the IR Receiver for the "Tacho Clamper" on PCB31 (not shown?!).  Key to me: There is only one "IR Window" listed, part number 9042.  It's shown in the blow-out diagram disembodied, but is shaped as you describe, a right-angle piece of plastic.

I think you have found the receiver and it's just super-sensitive (x3).  Maybe try the "ever-creeping black plastic garbage bag", starting with the whole damn unit covered up?  I would be surprised if the finger-protection IR protrusions were somehow prism-ing the remote signal inside the chassis and that was enough to trigger the multiple IR receivers way down on PCB14, but in theory it's possible, maybe?  Or maybe there is leakage thru the front panel elsewhere?  Anyway, the garbage bag will (hopefully!) tell you how far down.

Smart idea indeed to test the principle with a garbage bag covering the whole thing! (or thick blanket or so)

Yes, there really *are* 3  full-package IR receiver devices on PCB14, not just the 1 lens box by the side IR window: 2 are centered on the back side of the board.  This means that masking the IR receiver needs more tape or foil, and may not be practical.  They are under the waning-moon plastic bubble in the half-circle below the bottom CD position.  Covering that plastic is certainly possible, but leakage around the edge looks pretty likely.  (You can see them in Kose Trading's disassembly video, https://www.youtube.com/watch?v=z9Bd63-i_Gw , at about 35:00.  Service manual aaargh: It isn't called "IR Window", just "Window"!  Part number is 9025.)

The following is a true story, more or less.

Much later, after several plastic bags of different size and ply, after a rude skirt of aluminum foil (aluminum foil is used in construction as an IR radiant barrier), after multiple blankets draped…

I crawled on my back under the stand-mounted 9000 and unplugged the mains power and PL cable.  Standing, I wrestled the 9000 off the stand, then kneeling on the floor, gently placed the unit face down on a blanket on the floor.  I then crawled over to reattach the power and PL cables.  I then wrapped the unit again in another blanket, making sure to cover the bottom of the unit, leaving only the smallest aperture for the cables.    Standing, I grabbed the Beo4 for the last time, pressed ‘Radio’ and…nothing happened.  “Yes!” I exulted.  “Take that!”

Which was when my wife entered the room.  “What are you doing?”

I began to explain:  multiple B&O units in the same room, IR reception, Options, garbage bags, diapers of aluminum foil — it was at this point when I began laughing.

Taking a cue from my wife’s eloquent eye-roll, I gently returned the 9000 to its stand, unplugged the BC 9500, set Option 1 on the 9000, and enjoyed some music.

++++

Many thanks! to Beobuddy, BeoChecker,Tignum & trackbeo for ingenious suggestions and sleuthing on this little BeoAdventure.

For those who might be researching a similar issue, I found trackbeo’s discovery of multiple IR receivers in the bottom of the unit mapped with my masking experience.  Attempting to mask that area off was for me, not feasible.  Lots of reflected IR bouncing around.  And there are esthetic issues.  So: case closed.

That is so funny! The BeoVirus can hit you hard haha.

I would not have thought that the 9000 would be so sensitive. Brings me to a potential (and ugly) option: there are IR range limiters for Beo4 (for dealers), if your 9500 and 9000 are not too close this could maybe work? (though your 9000 seems to be eager!). Login to view image

https://www.idav.nl/reduced-range-ir-demper-beo4.html

another thought I had (not knowing how your speaker set-up with the 9500 is) was to put an ML/NL BLC between the 9000 (and use the NL network, to control the 9000 via the 9500 with Beo4 (or vice versa)), but I doubt you will have enough commands on the Beo4 to use for all the RADIO and CD and TAPE sources. If this sounds like an idea at all, check maybe this thread: https://forum.beoworld.org/forums/topic/difference-between-source-sugnals/ about 'three generations of link systems'.

 

ugly but cheap and very easy!

Login to view image

Hello, folks!

I will use this thread as long as my question is related.

I’ve just purchased and installed a BS9000 MK1. I already have a Beo4 in use wit a BS3000, working perfectly.

As long as my 9000 will be used as CD player only, I linked it to the amplifier - a Cambridge CXA81 paired with a pair of B&W 606S2 speakers - using the DIGITAL OUT.

Doing so I presume it is in default option 0. When I click on some buttons of the panel it says “TV OPERATED”, which confirms this.

But when I try to chance the audio mode on the remote nothing happens. No blinking lights and no change at all.

So is my 9000s IR not working or linked this way on digital out MK1 only works on option 0?

 

thanks in advance!