Alesis QS6 series -1996

User Manual: Alesis
Reset Proceedures: N/A
Operating System code:
MIDI or other control protocol:
Software related Links: QS Pages
Patches or knob settings: QS Pages
Circuit Overview: below
Scematics/Service Manual:
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: Many
General Info Links: QS Pages or Vintage Synth Explorer

Circuit Overview:
     The first enhancement of the Quadrasynth in a more compact package. Same VLSI ROMpler machine with less emphasis on user control and more on sounds quantity/quality. 6.1 enhancement has twice the memory (16M). The 2002 6.2 version has the new 24 bit DAC for improved sound quality. I beileve all three versions have unique mother boards. At least the 6.2 does.

Service Tips:
      Always verify power supply voltages if problem looks like it could remotely be power supply related. I have seen some bad solder problems and one intermittent processor reset problem that required a new board in an Alesis product. If you need to access testing functions etc. press 00 and 0 while powering up. If you need a reset save your data and press 0 and 3 while powering up.

Advanced Musical Electronics has a lot of parts for Alesis stuff. THey only deal with techs though.
I've also seen All electronics carry displays occasionally at low prices.Always feel free to ask or check my Parts
Contact Sound Doctorin'