Need Virus B Schematic/Service Manual

[HAMERMAN]

Does anybody have a schematic or service manual for a Virus B that they could send me?

I can see the (filled) note symbol on the screen when running MIDI data into the unit but I almost never get an output. On rare occasion's some patches will sound. Usually with distortion.

To rule out a currupted OS I reloaded OS 4.90 T and did a full reset (power on while holding down the "OSC 1" and "OSC 2" buttons).

All power looked good but just to be sure I Changed all of the electrolytic capacitors as well as the +5V_D, +5V_A, +3.3V_D, +8V_A, -8V_A regulator IC's since that seems to be a fix that has worked for others with silimar issues.

Looking at the Mute signals on the D/A converters with an oscilloscope I see a logic low. I wonder if this is dynamic (mute goes aways with notes) or if it's just supposed to be high in normal operation?
Since I hear sound sometimes I am assuming the DSP is OK, perhaps there is a power monitor circuit that could me muting the ouptuts (as would happen when power is switched off)?

[microluv]

Did you ever find the solution. Mine is the same no sound. Can see midi notes. Won't load OS??

[HAMERMAN]

No - still not sure what's wrong. Definitely seems to be loading the OS and working in all respects except that sometimes (most of the time) there is no output. Recently got access to a much more powerful Oscilloscope which may help with diagnosis but haven't found time to work with it yet.