At the time when the e1xm yahoo group operated, I had downloaded a 'service' manual, which I still have. This is fairly good, but lacks all schematics, limiting its helpfulness in tracing faults etc.
I can send it to you at your private mail address. Call me at <najrao86@gmail.com>
I have three of these e1's, and have bricked one of them while fault finding -- entirely because of a serious error in the service manual. More about this if interested.
NAJR