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  • October 2, 2009 at 3:21 pm in reply to: Need help soldering Small Stone wires #101993
    Javo
    Member

    Yesterday i took the pcb under a glass magnifier and diferent types of ligth, i am all shure now that the IC numbers are: MC1458N, 7726.

    Surfing the web I found a Dr. Q. schematis wich match 99%, (a sligth diference in the way the IC is connected), i solder the bass switch, and the output as the schematic, but the unit makes a loud bzzz, like short circuit, but moving the internal trim makes a wha type of noise.

    The schematic is from a company that sells proyects so i hope is rigth.

    I will test againg the parts, i am a poor soul trying to understand electronics.

    The wierd thing is that the case is from a Small Stone, don`t know how/when it was changed.

    Thank you nice people.

    javo

    September 30, 2009 at 5:31 pm in reply to: Need help soldering Small Stone wires #101937
    Javo
    Member

    Thank You EH Man,
    Javo

    September 30, 2009 at 5:14 pm in reply to: Need help soldering Small Stone wires #101935
    Javo
    Member
    Quote:
    It`s hard to read it but i think the ic reads:
    Upper part —MC145HE
    Lower part —7726
    September 30, 2009 at 4:53 pm in reply to: Need help soldering Small Stone wires #101932
    Javo
    Member

    It`s hard to read it but i think the ic reads:
    Upper part —MC145HE
    Lower part —7726

    September 30, 2009 at 4:41 pm in reply to: Need help soldering Small Stone wires #101930
    Javo
    Member

    It reads: HE, FK, 183, thats all

    September 30, 2009 at 4:24 pm in reply to: Need help soldering Small Stone wires #101928
    Javo
    Member

    Thank for fast response!
    Here is the back of the pcb

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Viewing 6 posts - 1 through 6 (of 6 total)