Beocord 8000 BP534 transistor

[Pindsen]

Hi,
I have a dead Beocord 8000 and apprently there are no 6.2V out from 5TR1. I have 5.1V from 5IC3.
There are 15.4V in on emitter and 14.8V on basis but 0V from collector so I assume the transistor should go ON. There are no short-circuit from collector to ground as I measure approx. 275kohm. Looking in the datasheet it says that 5TR1 is a BP534 but I am not able to find any information on the net, it is a mistake in the service manual?

/Pindsen

[chartz]

BC534 perhaps?

[Glitch]

5TR1 is listed as a BD534 in the Beocord 9000 service manual. Is what you have a TO-92 or TO-220 package?

Glitch

[Dillen]

Shorted 1C53 (220uF)?

Martin

[Pindsen]

Hi,
I took the board 5 apart and could see that 5TR1 is a BD534 so there are a type mistake in the service manual. 1C53 is not shorted as is was replaced previously and still measure ok. It turned out that it was the flatcable from board 4 (section B4) to board 1 that had bad connection in the board 4 socket. It was very difficult to see, it was only a random pick from my side to lift it up and clean all flatcables and when lifting this flatcable it was clear that it could not have had any connection in the socket. The reason for cleaning the flatacbles are because some of those for board 4 have grease in them from the front lid opening mechanisme. Ensuring that all flatcables have proper connection the tape deck now works again.
Now next fault behaves as this issue:
https://archivedforum.beoworld.org/forums/t/31556.aspx
Maybe I also “just” have a TR9 issue.

/Pindsen

[Pindsen]

Hi again,
It turned out that the BC8000 did not have a “TR9” issue – my issue was also a little different. It could Play, REW and stop by command but when selecting FF it stayed in FF eventhough pushing Stop. Measuring around on board 4 showed correct electrical signals. It turned out that the FF solenoide was half stuck staying in outer position. Lubricating the rod inside solved the issue.
Finally everything works 🙂

/Pindsen

[Ninni]

Pindsen wrote:

Hi again, It turned out that the BC8000 did not have a “TR9” issue – my issue was also a little different. It could Play, REW and stop by command but when selecting FF it stayed in FF eventhough pushing Stop. Measuring around on board 4 showed correct electrical signals. It turned out that the FF solenoide was half stuck staying in outer position. Lubricating the rod inside solved the issue. Finally everything works /Pindsen

Similar to the issue I had with my Beocord 5000. Fixed by cleaning and lubricating.

[Author]

Posts