Service and/or user manual for Micromaster LV48 programmer

[bringoredo]

Hello,

Is there anyone here with any sort of information on the Micromaster LV48 programmer, please?
Ideally, that would be a service manual but, otherwise, any type of information would be good.
I've recently acquired one such programmer, but it fails the self-test and I would really like to bring it back to working order.

Thank you!