Hiya all
Working on a Linn lk100 and it seems to be stuck in protection..
The left channel had blown output transistors. Replaced them. Nothing else downstream seemed out of spec but yet no sound. Measuring at the DIS point shows me -30v which from what I read is the protect kicking in. I've removed the board and reflowed much of it but now I'm kinda stumped? All my rail voltages are good as well.
Working on a Linn lk100 and it seems to be stuck in protection..
The left channel had blown output transistors. Replaced them. Nothing else downstream seemed out of spec but yet no sound. Measuring at the DIS point shows me -30v which from what I read is the protect kicking in. I've removed the board and reflowed much of it but now I'm kinda stumped? All my rail voltages are good as well.
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Would anyone happen to have the power supply portion of this schematic?? This thing is driving me crazy, there's really not a lot going on in here but I still can't figure out why it's not happy??
Is DIS the protection circuit control point?? It could disable diff input and VAS stages, to prevent signal amplification...
Where is DIS connected to inside the amp??
I can't see it going anywhere? No mark on PCB , just typical connection points from R227 to R231. The amp mirrors all connections for the other channel with 300 designation ( R327 to R331)