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  1. roughshawd

    Cordovox piano G keys dead

    No worky.... Whaddya do..mumble mumble...
  2. roughshawd

    Cordovox piano G keys dead

  3. roughshawd

    Cordovox piano G keys dead

    Just a scratch. .. This is the tone bar board. There was a shielded, green wire, that may have bent over shorting across these components
  4. roughshawd

    Cordovox piano G keys dead

    Just a scratch. ..,.
  5. roughshawd

    Cordovox piano G keys dead

    Reflow required..
  6. roughshawd

    Cordovox piano G keys dead

    I don't know what this is. Looks like a hairline fuse someone put in it.
  7. roughshawd

    Cordovox piano G keys dead

    All those 3.3k are reading between 2.8 and 3.2. there is some resistance there... Why I said they were good, maybe change the ones at 2.9 and lower??
  8. roughshawd

    Cordovox piano G keys dead

    I'm thinking... Anything that could change the input output on the chips might cause the failure I am experiencing, so I'm checking the resistors between the chips and the key switches, for low resistance or a blown component. 3.3 circuits ok. There is a hand written .1 k on the schematic which...
  9. roughshawd

    Cordovox piano G keys dead

    Put the screw in the tone controls, and now nothing works... Loose + broken connection somewhere in the wiring? I couldn't find a single wire trace. continuity tested all of them.. there is no wiring in this device... completely missing!!!
  10. roughshawd

    Cordovox piano G keys dead

    I put the screw in, closed the lid, nothing works... There is 4.5v on the +9 IC rail....
  11. roughshawd

    Cordovox piano G keys dead

    Found one of the screws....
  12. roughshawd

    Cordovox piano G keys dead

    This shield is probably supposed to be fastened down.
  13. roughshawd

    Cordovox piano G keys dead

    On the schematic, there is a table that says, CX CXIpf, it lists the notes the keys play from Do(C) up to Ti( typed Si, which is probably a typing mistake for Ti or B) and a corresponding value. Where C or Do is 6250 and Si, Ti or B is 6615, F being 4685 and F# being 8830. What are these values?
  14. roughshawd

    Cordovox piano G keys dead

    Solder glob fell out while pulling the box... (See image note electronics afficianados, protection shield to catch small parts and hinder shorting of boards)...
  15. roughshawd

    Cordovox piano G keys dead

    Middle circuit is the "sol" or G key circuit. As you can see someone has dropped a large blob of solder on one of the transistor legs. So I'm not the first hacker in here….. The board is contained within a box below the key set, accessable by removing two(2) screws, one on either end of the...
  16. roughshawd

    Comedy Thread

    The vet tied them up?
  17. roughshawd

    Cordovox piano G keys dead

    Maybe the tuning pot has gone fritz...
  18. roughshawd

    Cordovox piano G keys dead

    Do you think it's safe to replace the original K06 chip with a similar E06 chip? Same make manufacturer , and chip number...saj011, just not k06...
  19. roughshawd

    Cordovox piano G keys dead

    The chips are all this kind ...
  20. roughshawd

    Cordovox piano G keys dead

    Do Re Mi Fa Sol La Ti Do C D. E. F. G. A. B. C This is the G circuit.. Labeled 'sol' on the schematic. The radial cap is probably ok... I have never attempted to change an IC, and never hope to change one.. But from the lack of present sound I certainly should find one...
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