wowi

Re: SSL 9K & 4K (E Series) 500 / 51X NEW BOARDS Mic Pre Thread 2011
« Reply #620 on: June 28, 2020, 10:16:13 AM »
Hi, i  just powered up and R2 exploded. Without meterboard everything is ok.
I think, there was extra copper on the meterboard with a short power to ground. But the image has lost.
Can someone tell me, where exactly i had to cut a trace on the meter board ?

Thanks
Wolfgang
« Last Edit: June 28, 2020, 11:01:35 AM by wowi »


TillM

Re: SSL 9K & 4K (E Series) 500 / 51X NEW BOARDS Mic Pre Thread 2011
« Reply #621 on: June 28, 2020, 12:07:13 PM »
Yes there is a problem with grounding at the meter board.
When the led are in front of you, it’s the opposite the left side.

*when die LEDs von dir wegzeigen, dann ist es die linke untere Ecke.
Dort musst du ein wenig vom Kupfer abtragen.

Ricardus

Re: SSL 9K & 4K (E Series) 500 / 51X NEW BOARDS Mic Pre Thread 2011
« Reply #622 on: June 28, 2020, 04:26:05 PM »
That issue is from older revs, right? I wonder how old his board is.
Audio mastering for hire..

wowi

Re: SSL 9K & 4K (E Series) 500 / 51X NEW BOARDS Mic Pre Thread 2011
« Reply #623 on: June 29, 2020, 07:38:18 AM »
I just checked the led PCB and it's a correct version . No short.
The problem remains the same. R2 is Smoking. I have to check again this evening.

TillM

Re: SSL 9K & 4K (E Series) 500 / 51X NEW BOARDS Mic Pre Thread 2011
« Reply #624 on: June 29, 2020, 10:47:14 AM »
I don’t think that there was ever a revision.
Just remove some copper at the left side at the LED meter board.
R2 is always smoking, when you have a grounding short.

wowi

Re: SSL 9K & 4K (E Series) 500 / 51X NEW BOARDS Mic Pre Thread 2011
« Reply #625 on: June 29, 2020, 11:45:16 AM »
Hmmm... I just noticed: IC4 (tl074) was smoked also. Its the driver stage for the led


 

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