Accesss Virus KB

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For more information, see this article's corresponding Wikipedia page: Access Virus.
This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables
This device is in the WorkNeeded:General category because it was flagged as missing general information about the device. The information may be incomplete, using default text, or inaccurate and should be verified with external sources if possible. If you can add or correct information on this page, please feel free to edit it and do so.
Access Virus KB
Preliminary Information
Release Year 1999
Batteries Removeable
Mounting Technology Through Hole, SMD
Destructive Entry No
Power Requirements
Input Voltage 120V AC
Power Connector NEMA 1-15-P

Following up on the success of the popular Virus, Access unleashed an upgraded model in 1999, the Virus B. The original Virus A had 12-voice polyphony, but the new OS in the Virus B doubles the polyphony from 12- to 24-voices and the oscillators, from 2 to 3 per voice. The new OS also added an enhanced programmable 32-band vocoder. There are now up to 82 simultaneous effects, a retro-phaser (6-stage stereo phaser with 24 filter-poles), chorus/flanger, ring modulator, multiple forms of distortion, an analog boost algorithm, and an envelope follower. Up to five FM (Frequency Modulation) modes are also on-board now and many new sounds have been created for this bigger and better version of the Virus.[1]

Known Issues

Symptom or Problem Encountered

The synthesizer will not power on. Sometimes there will be lights on the LFO knobs. The display will be dim with no information.


  • Normally the brown 100uf 25v capacitor has failed


  • Replace the brown 100uf 25v capacitor.

Disassembly Notes

The Knobs do not need to be removed to disassemble.

Original Parts

Main Board

RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
1 100 uF 25 Through Hole Radial 6.3mm 11mm 2.5mm 105c Electrolytic NIC Components NRSZ

Replacement Parts

Main Board

RefDes Qty Compatible Part Number Order Links
1 860080473006 / 25YXG100MLLCT16.3X11 Digikey Mouser LCSC

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.


Related Links