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BS9000 IR Remote Problems

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machineage
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machineage posted on Wed, Jan 28 2015 9:40 PM

Hi All

I have just acquired a BS9000 Mk1 & a pair of Beolab 5000 speakers. The BS9000 is working fine - as are the speakers & displays.

However the BS9000 responds to input via the manual keypad - but not remote. I have a BL 1000 and have entered SOUND - 1 - STORE whilst the unit is in standby. The standby LED doesn't blink and it still won't respond to the BL 1000. I have also tried with a Beo4. Mine is an early version & the display doesn't flash when you press standby & list - but I can get to 'A Opt.' and then press 1. Again no LED flash from the BS9000 & no response from either IR remote.

Any ideas anyone?

Thanks!

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Beobuddy
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And the second one.

 


Beobuddy
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Beobuddy replied on Thu, Jan 29 2015 10:05 PM

Replacing the board at that side means dismantling of the alu plate from it's plastic body. A rather time consuming job as the sledge slides through the bracket mounted on/beneath the alu plate.

Beobuddy
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Beobuddy replied on Thu, Jan 29 2015 10:07 PM

Most user uses the BS9000 with a Beovision. Then the commands comes via ML from the BV as the speakers are attached to the BV then.

machineage
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Thank you Beobuddy for your detailed reply!

I have looked again at the IR receiver PCB located by the CD platter - and it looks fairly clean even though it is quite hidden. I wasn't aware of the IR receiving diode by the standby button. So I tried again with both remotes pointing directly toward it. Still no response.

I guess it's looking more & more likely the PCB is faulty Sad

 

 

Beobuddy
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Despite the fact that parts hardly available are for the mk1, the ir PCB from the mk3 is slightly different, but fits perfectly.

The small ir-PCB doesn't cost much. Labour will be a bit more. can be done within 1-2 hours if the technician keeps the sledge in the first position to provide enough space the change the PCB.

machineage
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Thanks Beobuddy

I wonder what the chances are of finding a used PCB14 from a BS9000 that is being broken for spares... Any idea of the cost of a new PCB14?

How difficult a job is it? I am an engineer and have worked on many electronic devices over the years Smile

Thanks again

stefan
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stefan replied on Fri, Jan 30 2015 11:12 AM

Before trying to find another PCB, I`d try to activate the BS9000 and change the option setting by using a Powerlink dummy plug.

Disconnect your BL5000 (you are talking about BL5000 panel speakers from the 80s with orange display?), get 7 pin DIN plug, solder a bridge between PIN 4 (5V) and PIN 2 (ground). Plug the dummy into one of the Powerlink sockets, reconnect your BS9000 to the mains, wait a minute and try to set the system to A.OPT 1. 

I`m not sure if this helps, but maybe worth a try. BL5000s are a bit special. They are not be activated by PIN 4, but by PIN 1. PIN 4 is for speaker mute.

BS9000 uses PIN 4 to check if Beolabs are connected.

Should be possible to test test this. Just press the mute button when the BS is active - BL5000 should turn to standby mode...(?)

You will find detailed info on the beotech site - wiring/powerlink.

Hope this helps...

Stefan

 

machineage
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Hi Stefan

Thanks for the reply.

I'm wondering if this is turning into a Workbench thread!

I was halfway through dismantling the BS9000 when your post came in Wink. A fairly logical procedure following the instructions in the service manual - I was about to remove top plate.

OK - in excitement I replaced everything. I opened one of the PL DIN connectors & shorted out pins 2 & 4 (Yellow & Signal Ground) & checked for continuity.

Reconnected just this PL lead - plugged the BS9000 into the mains and switched on the via the rear red pushbutton. Waited a minute - then tried again first with the BL1000 SOUND - 1 - STORE. No confirmation flash from the standby LED Sad 

I tried also with the Beo4 as above - again nothing.

Before I reassemble the DIN connector - I measured the voltage from pin 4 to ground whilst the BS9000 is in standby which was 1.25v - is that acceptable?

OK - so I hooked up the BL5000 speakers (yes the ones from the late '80s with amber displays). Popped in a CD (death metal would have been appropriate under the circumstances) & powered up. Pressed CD on the manual keypad - and everything springs into life and CD playback begins. When I press MUTE on the BS9000 keypad - the sound quickly fades to mute - but the BL5000 displays remain lit with data & no relays activate in the speakers. Pressing MUTE again quickly fades the music back.

Sad

stefan
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stefan replied on Fri, Jan 30 2015 4:12 PM

machineage:

Before I reassemble the DIN connector - I measured the voltage from pin 4 to ground whilst the BS9000 is in standby which was 1.25v - is that acceptable?

This is strange. Voltage should be <0,5V when off, and >2,5V when on. PIN 1 is for Powerlink on and PIN 4 for speaker on/off.

This is for older Beolabs like BL5000, Penta... Now they use PIN 4 for Powerlink on, and I thought, your BS9000 is wired this way (my BS9000 is, but it`s an MKIII...)

You will find this info on beotech site (scroll down)

http://www.beoworld.org/beotech/wiring2.htm

Stefan

Beobuddy
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No, it's not. It's a sensing mechanism which provides that low voltage. 

With the latest mk3 penta's, pin 1 isn't used anymore. Pin 1 and 4 are connected internally in the penta. But as already mentioned by TS, the set works fine. Only ir doesn't work. 

BTW. By shortening pin 2 an 4 at the BS9000 powerlink, the BS9000 starts in option 1. No futher option programming is needed. 

Beobuddy
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Don't search for a used pcb, just order a new one. 

machineage
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Thank you guys

Yes the system works perfectly  - just no IR after all these tests etc.

I will look into the pricing on Monday. Should I just go to my local B&O dealer - or to B&O direct?

I will sit down for when they give me the price Big Smile

machineage
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OK guys - the PCB arrived today. I installed it - then with some hesitation I pressed SOUND - 1 - STORE on the BL1000 - and the standby LED blinked - HOORAH!!! I then pressed RADIO on the BL1000 and it sprung into life Big Smile

So it was the PCB after all.

Now - I have another problem with the test modes - that is for another thread I feel.

Thanks to all you guys for helping with this.

Choobi
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Choobi replied on Tue, Jun 29 2021 6:55 PM

Hi Machineage,

I had the same problem as yours but I dont know how to remove the PCB for the IR receiver.Can you give me an idea how to remove it?If you dont mind.Thank you.

Choobi
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Choobi replied on Tue, Jun 29 2021 7:02 PM

Hi Beobuddy,

Can you give me an idea on how to remove the IR PCB as seen on this picture?If you dont mind.Thank you.

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