I have a couple of Crest 9001's on my shelf with obscure faults.
I talk to Peavey / Barnes & Mullen here in the UK.
They have provided me with the schematics but there does not appear to be a service manual or details of the wiring harnesses.
Also details of how all the protection / Autoramp / IGM would help.
Can you help?
Dredging up a nearly 5 year old thread to try to make a sales contact is generally considered poor form, especially in one's first post...
The forum rules can be hard to find, but here's a link: https://soundforums.net/community/help/rules/
Of note is that they require manufacturers and dealers to disclose their affiliations.