Hi I have a Pass Labs X1 preamp, and I’m currently facing an issue where, at volume level 3, the left channel suddenly goes to maximum loudness. During troubleshooting, I swapped the volume control board with the right channel, and the problem followed the board. This confirmed that the issue lies with the volume control board.
After further testing, I identified that Q3 on the board is the faulty component. It’s marked as “8F” and comes in an SOT-23 package. However, I haven’t been able to find much information about it. Could you help identify the exact part number for this component?
After further testing, I identified that Q3 on the board is the faulty component. It’s marked as “8F” and comes in an SOT-23 package. However, I haven’t been able to find much information about it. Could you help identify the exact part number for this component?
Hello mily65ir,
Andy means, that you should get in contact with Wayne Colburn of Pass Labs.
Wayne has engineered your Pass Labs X1. Perhaps he reads your question in this thread? This man is busy!
I would get in contact with Pass Labs directly:
www.passlabs.com
My Pass
contacts
Cheers
Dirk
Andy means, that you should get in contact with Wayne Colburn of Pass Labs.
Wayne has engineered your Pass Labs X1. Perhaps he reads your question in this thread? This man is busy!
I would get in contact with Pass Labs directly:
www.passlabs.com
My Pass
contacts
Cheers
Dirk
Wow that great I didn’t know . will write them and also try to find the way to contact Wayne
Yes I though so at first also , but I couldn’t get any reading on diode mode , that’s make me doubt it
When you change settings up or down, you should be able to measure and log which transistors changing state at each step.
(It's probably a binary progression).
At one point you will see that in the wrong channel the transistor doesn't switch state. That's the bad one. Replace and Bob's your uncle. DIYaudio at it's finest.
Bonus: since these are bog-standard switching transistors (or FETs) any type will do.
Jan
(It's probably a binary progression).
At one point you will see that in the wrong channel the transistor doesn't switch state. That's the bad one. Replace and Bob's your uncle. DIYaudio at it's finest.
Bonus: since these are bog-standard switching transistors (or FETs) any type will do.
Jan
Hi Jan thanks for the reply I have already find the faulty one , just don’t know what is the correct replacement
Any small signal with the right footprint will do.
What is the footprint? SMD or TH?
Jan
