GW-Instek GDS-800 Service Manual

[msraya]

Hello!

I have a problem with an Promax OD-581 with vertical chanel accuracy...
This Oscilloscope is a clone of GW-Instek GDS-800 series...
I Only need service manual in order to run the auto cal function that the instrument have.
It uses a BNC in the rear panel to do the AUTOCAL.

But Promax in Spain only do calibrate the instruments if I send It to them.. 
So if someone have the Service Manual PDF and send it to me, I will thank You forever 

Regards
Manuel