jose

HC´s number one rule: have more components in your warehouse than Mouser. Follow the trail of burned components Certified dead: CL resistor, r12, c2m1000170d, 2x bc557b, 2n3904. njm7915fa Changed as a precaution: Q7 10m90s. Q8 & Q9 ksc5026m and 24v diode. The rest of the components passed the test. Total: A few euros and a couple of hours.

Recovered the GRHV, I take a look to the amplifier. Interestingly, all damage is in the area of Servo/OPA27. It seems that most of the transistors are fine although I suspect that the IXTP01N100D are damaged (continuity between two of their legs). Tomorrow I will begin to dismantle the most damaged channel.

Yes, I used Vishay crcw0805 and crcw1206 too. Luckily the tubes are correct. Due to the somewhat peculiar configuration of this amplifier I have skipped my procedure for turning on.

Do not worry. Yes, almost immediately: the right channel burned and then the left channel plus the negative rail of the GRHV. The amplifier had been in "stand-by" for 5 minutes, heating the heating filaments before applying voltage. At the moment I have cleaned the damage on my PSU; I have verified that the low voltage source has also passed to a better life... although it is already ready again (news LM7X15). I suppose that when the OPA was short-circuited it took the LM ahead. I have cleaned the GRHV negative rail board and will install it tonight. About the amp: I still have to check for damage. Both LEDs were on when everything happened. I hope the damages are only reduced to the part of the OPA27. Any suggestions on possible collateral damage? My idea is to remove all parts of that servo and run the amp without it or using the servo on top. I understand that it is possible.

No a good day… OP27 next to VOL618A on fire of both channels and GRHV negative rail dead too. I thought that in this board version that I have this problem was corrected ... I was wrong. I hope I just screwed up the OP27 and not the rest of the sand. Positive, I was able to see that all the LEDs were on. It will take a long time to desolder everything.

I have become a subscriber .... although I do not have speakers on the PC

Happy Birthday!

Happy Birthday!!!!

Paradise must be something like this !!!!

... My love she's like some raven At my window with a broken wing

Fedex subcontract to other transport companies depending on the country.

Happy Birthday Chris!

I mounted them at the bottom of the board and used the typical Phoenix terminal .... so far I have had no problems. PS: About the Phoenix terminal, I have seen some cheap terminals that come with a bit plastic protection that covers the Pin base. At what each terminal costs, these Phoenix guys could add it.

Happy Birthday

DEP Florian

Thanks Mwl168.

In this two months of confinement has given me time to rediscover things like this:

I have used a "Prologue", very similar to this for five years. The first week was a pain... but once you get used to it it is the best I have ever had.

Happy Birthday

Lee Ritenour "6 string theory"