Lexicon PCM 41 Noisy - Bad Chips?

[shobud]

I have a Lexicon PCM 41 that makes faint crackling noises non stop but only when the 200-400ms delay is selected.

It was making some other odd noises but i reseated most of the chips and they went away.

Wondering if anyone has any idea what could be causing this issue. Bad chip associated with that setting?

Thanks for any help!

 

[JohnRoberts]

faulty memory chips or a bad solder connection on a memory address line can cause nasty sounding distortion... longer delay is using more of the memory.

JR

 

[shobud]

faulty memory chips or a bad solder connection on a memory address line can cause nasty sounding distortion... longer delay is using more of the memory.

JR

Thanks for bringing my attention to the memory chips. I pulled them and noticed some oxidation that I missed. Cleaned the pins and sockets and reinstalled(though not taking note of which came from which position). Either way it's working perfectly!

Nice Cobra! I sold my '98 GT and regret it every day.

 

[JohnRoberts]

My cobra is still running pretty strong, drove it today.

I am getting a little nervous about reliability at 27 years old give or take.

I've got an ABS brakes idiot light .