[edo69]

Hello,

some days ago I went to my repair boy to take my BS9000 at home, perfectly functioning (this said the technician).

He was right, the cd now works properly, and the audio, by the earphones plug is perfect.

He did just replace a capacitor (not reported in the diagram into the mkIII service manual) (!!!) to fix the problem.

But he had not the possibility to check the master link plug; I did it at home and now the sound is present, but at a very very low volume.

He now suggest to replace ALL the capacitors in the PCB 32 board (about 30), having them 25 years of working behind them.

We will do that, as soon as we  have procured all the capacitors, and I will let you know.

I’m thinking that this will be the right time.

See you

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello, I have readen your thread, ’cause I am having the problem of some n.radio, present in the menu, but when I select, the logo blinks for hours, and no streaming.

Hope you got to fix the problem; aniway is a shame that B&O does not support anymore this product; a B&O device should be forever.

Evidently B&O is no more the same we are used to know.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello, I did the test you suggested me, more times.

When I turn on the CD, i have no sound; switch to radio and it works; come back to CD and again, no sound.

What is happening now is that I turn on the CD, and there is no sound, if I let the CD go, after some minutes, the sound comes out, and goes on….

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

That’s incredible,

with the BS9000 at home, linked with Beovision7 and Beosound5 via master link, as usual, this morning the CD worked fine; I have listened to 2 whole CDs.

After lunch, I turned on again the CD, and it worked, but no sound at all.

As usual, the CD was spinning and the time counter advancing. I changed track and CD, but always no sound.

I really I don’t know what to think.

HAve a nice weekend

• This reply was modified 1 month, 3 weeks ago by edo69.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello, in response to your question, yes, the time counter still continue to advance normally from 00:00, even in case of no sound.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Tanks for your opinion and suggestios.

Is not the first time I check the TM71, and it always went fine.

Just the first times, when i tiried this test, I haven’t readen that the position #1 must be without the CD; once learned this, this test never gave me any problem.

I try to remember that the last time I did test TM71 was after the replacement of TDA1305T, and went fine.

Me too I’m thinking that TM71 fault and intermittent audio are due to different reasons.

The strange thing is that sometimes the CD works perfectly, even for hours, and sometimes works with absolutely no sound.

 

 

• This reply was modified 1 month, 3 weeks ago by edo69.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

A maybe important thing I forgot to tell you is that in the last few days, I did 4 times the test TM71,  with CDs in all positions except #1, as suggested in service manual.

Any time the test did not get to its end, because first open and close the glass, and it’s OK; then the sledge, attempting to move from position 1 to 6, always crashes into the CD in position 2, and the BS9000 turns OFF.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello, unfortunately I sang victory too soon.

Once replaced the LF33CDT, as you already know, we tested the BS9000 for about one hour, changing often CD and song, without any problem.

I brought it home and reconnected it.

In the same day I listened to various CDs without any problem.

The next day I turned on CD, and The CD begun to spin, the counter advanced properlìy, but no sound.

I tried more times, always with the same result.

The day after, I turned on RADIO from another room (trough Beosound 2000), radio worked fine, Then I tried with CD and it worked well.

Yesterday and the day before, always no sound. Not in yhe loudspeakers, nor in the headphones.

We have to start searching again where the trouble is…

There is something more: sometimes the commands do not reach BS 9000 (that is in option 0): happens sometimes that I give the command “CD” with the Beo4 to Beovision 7 (with option 2) and the BS 9000 does not turn on.

It even happened that, giving the command “n. music” with Beo4, the display on Beovision 7 is not “n. music”, but “n. music 1” and Beosound 5 (in “master audio off”) does not turn on.

So I think that:

BS 9000 is still not working properly;

I even have a problem with masterlink connections (or BS9000 working not properly, crashes the masterlink connections)

It’s always more complicated.

• This reply was modified 2 months ago by edo69.
• This reply was modified 2 months ago by edo69.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello,

GOOD NEWS, AT LEAST!

We finally got to replace the LF33CDT and now the BS9000 sounds great!

Te tested it for more than 1 hour, without any problem.

The funny thing is that I have bought 4 of this component at the price of 7 Euros.

Once again, thank you for all your support.

 

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello,

finally we had the possibility to test PCB32 components with the cooling spray.

the result was that the sound remains for more time cooling the LF33cdt.

So we will buy some and we will replace it in 2 weeks, ’cause the technician is going to holidays.

I will let you know…..

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello, I begin to have some doubts regarding the possibility to repair the PCB32.

Right today, I have readen that the PCB 32 is a multi-layer board (4 layers); do you think that the issue could be in an internal conductive track?

In this case, we can not check nor repair internal tracks.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

What happens is that, when I am cooling the C403 on PCB32 with compressed air, the souud comes back, but it lasts any seconds, then disappears again. What does it mean?

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello

Thanks again for all your help.

The issue is increasingly complex.

As you already know, after replacing the Ic TDA1305T, the issue is still present.

These are today’s updates:

First of all, we were unable to find a can of spray cooler, so we did the test with a can of simple compressed air.

We ordered the spray cooler online, and it will arrive soon.

In the meanwhile, we noted that cooling the capacitor C403, the sound come out back; we replaced it, but nothing changed.

Then we replaced the capacitors C401 and C403, ’cause even cooling them, the sound come out back. But the problem persists.

We noted that wnhen the sound disappears, the TR405 output voltage starts to oscillate (from 3,08V to 3,22V, more or less), but we did not find what C403 got to do with TR405 .

So we are taking a pause due to the arriving cooler, that will allow us to make more accurate tests.

That’s all for the moment.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello,

today I have bad news and good news.

Bad news: after replacing the TDA1305T, the problem persists.

so you were right, being not convinced that the fault was in said Ic.

good news: the techician tried to cool down dhe PCB32 board after the BS9000 became mute, and the sound came back.

now we have to find out which one is the component that overwarming itself cause the problem.

do you have any suspect?

 

• This reply was modified 3 months, 1 week ago by edo69.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello,

the board with the two TDA1305T is jusr arrived.

The day after tomorrow we will replace it and I will let you know the result.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Hello,

unfortunately the DAC board I have found on http://www.audiophonic.fr is not the same mounted on Beosound 9000; It is only used to disassemble one of the two Ic TDA1305T and replace the original one with it.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Unfortunately noone of these suppliers you suggested have the TDA1305t in stock.

I also tried with 12 other sellers, such as: Mouser, Farrell, Tme, etc. and noone had avaliability.

So I decided to purchase an entire DAC board with n. 2 TDA1305T inside, on http://www.audiophonics.fr; I will keep you updated

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Sorry, I missed to tell you about this test, that we already have done:

The result is that when the sound disappears, even the analog audio signal disappears at the output pins of the TDA1305T .

At this point, I think we have no more any doubt regarding the need to replace the TDA1305T to fix the problem.

As you already know, we already tried to replace the original DAC with other two, that I have purchased on Ebay, and, no obstain the Ic’s were guaranteed as “original” and “brand new”, noone of them, once mounted, werk properly.

Do you know any reseller of electronic components who could sell me a truly original and brand new Ic?

Thank you a lot for your precious cooperation

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

Goodevening,

today with the tachnician we check these line:

pin:
4. BCK -> Signal ok

5. WS -> Signal ok

6. Data -> Signal Ok

19. MSUB – > before and after audio stop remain on 5v

1. VDDA – > 5v, before n after

10. VDDD -> 5v, before n after

28. VDDO -> 5v before n after.

 

Technician reamin on idea that the issue is the DAC.

Location: San Marino

Favourite Product: Beosound 9000

[edo69]

I think is always beautiful, even in this version.

Location: San Marino

Favourite Product: Beosound 9000

[Author]

Posts