Beomaster 4000 tuning lights & meter

3 replies
PV
Paul Vernon
Silver
4 posts
Posted May 6, 2026 at 16:50 GMT
#690926
I have just refurbished my BM4000 with the Danish sound parts kit, everything is working well apart from the tuning signal lights and meter. Both side of the lamps have 15 volts (hence no light) and from the diagram there should be 8.8v at TR11-15. Are there any tips or common faults with this circuit ?   Thanks   Paul

Location: Brighton UK

PV
Paul Vernon
Silver
4 posts
Posted May 7, 2026 at 17:55 GMT
#718411
Can I also add that the collector  of TR9 has zero volts, I can't figure why. Any ideas?   Cheers     Paul
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Location: Brighton UK

PV
Paul Vernon
Silver
4 posts
Posted May 20, 2026 at 14:17 GMT
#718510
OK folks I have fixed the problem, I just needed to increase the level in the front end by adjusting trim pot 74. All lights working now.   Paul

Location: Brighton UK

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