Left channel issue on Beomaster 4000?

5 replies
Steve Adcock
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Steve Adcock
Bronze
Posted February 2, 2025 at 22:02 GMT
#1644434
Hello from Las Vegas!

I have a 4000 with a dead left channel and before I go and do a total re-cap thought I might ask is there any known idiosyncrasies as to voltages on this unit. Because I am getting some weird ones.

It has that extra 8002135 board...loudness?....that had some out of spec resistors which I replaced but things are still not right.

The resistor marked 1500 ohms should be 2.7k like the one I replaced.

Any help would be greatly appreciated!
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matador
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matador
BronzeModerator
Posted February 7, 2025 at 13:36 GMT
#1668690
Last time I had a silent channel it was from the large output capacitors.

Should it happen again, i would start there.

Location: Paris France

Steve Adcock
Offline
Steve Adcock
Bronze
Posted February 7, 2025 at 16:38 GMT
#1668697
Thank you but I figured it out. Shorted TR51.....
PI
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Pindsen
Bronze
Posted February 9, 2025 at 09:04 GMT
#1668740
Hi,

Good that you figured it out.
You mention a 1,5kohm resistor you suggest shall be 2,7kohm - is it 566 at basis of TR53 and why do you suggest this changed value?

/Pindsen

Location: Denmark

Steve Adcock
Offline
Steve Adcock
Bronze
Posted February 9, 2025 at 17:23 GMT
#1668755
No, it's on the 8002135 board...image above...that is not on the schematic. Two 2.7k resistors were down to 1.5k so they were replaced with the correct value....
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