Janne,
Welcome to the group.
)
Also there is a description of how to set up rollers, pads etc...
Main things to look for are...
- Frame out of square - causes squeaks and general tape replay problems, the keyboard should be an easy fit and not need hand-to-hand combat to remove it!
- headblock grounded (hum) should be on insulated rollers
- tone pot wiring sounds wrong or a short circuit capacitor
- CMC10 can be source of whine and motor slowing when playing big chords
- tape heads should be clean and demagnetised (otherwise partial tape erasure can occur)
- single notes being quiet could be problems / damage to felt pads / pad arms
- EMI did use some less well specified components (mine had the mains transformer replaced)
However it is possible to get an EMI machine to play just as well as any other as I know from my own machine.
Stick with it - its worth the journey.
All the best,
Norm