Accesss Virus KB
- For more information, see this article's corresponding Wikipedia page: Access Virus.
| 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.
Causes
- Normally the brown 100uf 25v capacitor has failed
Solutions
- 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 | Aluminum Electrolytic | NIC Components | NRSZ | |
| 2 | 220 uF | 25V | Through Hole Radial | 8mm | 11.5mm | 3.5mm | 105c | Aluminum Electrolytic | Rubycon | YXF |
| RefDes | Qty | Model Number/Part Number | Manufacturer (If Applicable) | Explanation | Datasheet |
|---|---|---|---|---|---|
| 3 | GS71108J-10 | GSI Technology | 1 Mb Asynchronous SRAM (10 ms read/write) | GS71108J |
Replacement Parts
Main Board
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| 1 | 860080473006 / 25YXG100MLLCT16.3X11 | Digikey Mouser LCSC | |
| 2 | 25YXJ220M6.3X11 | 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.
Kits
- Digikey BOM: https://www.digikey.com/