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Beogram 5500CD channel not working. Solder joints?

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Alpinab7

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Alpinab7 Posted: Wed, Nov 18 2020 8:39 PM

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Hi all,

I'm new here but have owned B&O stuff for years along with my Pioneer SX-1280, HPM-100 speakers, Sansui 9090DB, some McIntosh, Teac reel to reel, etc. I recently picked up a B&O 5500 system with a pair of RL140 speakers. It needs plenty of work but I find it very relaxing to work on this stuff and it was very cheap. I just picked up a DIN to DIN cord for the CD player and realized that it is not working properly. I did search and found another thread with some clues but it was 4 years old and never was resolved. Here's what i've found out:

Set to CD and with the DIN to DIN cord from the CD player to the Beomaster CD input there is no L channel and the R channel works as expected.
Set to AUX and using the RCA/coaxial jacks on the back of the CD to the Beomaster DIN tape 2/aux input there is no L channel but the R channel works as expected.
Set to Radio or Tape both speakers work as expected.
Of the two RCA/coaxial jacks on the back of the CD player the left one (facing the front of the CD player) is loose and can be wiggled. I assume this is the left channel output.
Set to AUX, swapping the RCA jacks (left to right) on the back of the CD player make the opposite channel work so there is seemingly no issue with the Beomaster.
In all of the above instances I can hear the L channel just slightly if I unplug the right speaker and turn the volume all the way up--even if I have the left RCA jack unplugged. Just some bleed through?

Am I correct that I should be checking out bad solder joints on a board on which these connectors reside? There was some talk about IC1 and IC2 (I don't know what those are) and that if the RCA outputs worked that the problem was between the two. Perhaps I have that problem regarding the DIN socket and another problem with the other wiggly RCA is causing that not to work? Any thoughts are appreciated. I know a little about electronics but not much. But I am comfortable getting in there and going slowly to figure it out. Thanks.