Quick question, does the 8000 share output boards with the 6000?

I think the best thing to do is to replace the board. Do you have access to one, or know where to find one? My board is pretty darkened under the row of resistors. And, when I was replacing those resistors, several traces lifted on me, and I had to re-do the circuit connections.

The "blast" would have been pretty neat--except it was on my receiver! I did not replace any of the semiconductors except the predrivers. They looked pretty badly scorched. I'm thinking now a diode might have failed into a dead short. Other than replacing the emitter resistors and TR209, what should I look at next? I'm going to re

Well, I got the parts today, and attacked the Startup Board first, putting the new resistors in. Now, I had previously removed the output transistors on the amp board that had blown up, and had disconnected power to that board. I powered the unit on, and it worked. 2 relay clicks, and 55V present. Then, I put in the new transistors, and reconnected

Can I do a resistance test on the transformer secondary? Do I remove the leads going to the rectifier? What about the big lead going to the main filter caps? Thanks!

I have ordered more output transistors and power resistors. Next step will be installing those sometime later this week, or this coming weekend. Then I hold my breath and switch it on again...

Well, I figured out a couple important things: 1. The circuit does not match the schematic. The circuit diagram shows the two 5.6 ohm resistors in series , for 11.2 ohms total. The circuit board itself has the resistors in parallel , for total resistance of 2.8 ohms. This appears to be from the factory, but I don't know for sure. 2. The brand-new

Excellent explanation! That's exactly the information I was looking for. Thank you Martin, you're a great help!

I started a new thread about the Delayed Relay circuit.

I'm trying to troubleshoot the Delayed Relay circuit in my Beomaster 8000. Looking at the schematic, it appears that the trigger comes from the secondary windings of the large transformer. But how is the relay R1 to be energized, if the transformer is downstream from R1? It also looks like current can flow around R1, through the two 5.6 ohm power