--- In
PolySix@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>
> The VRs look okay. Just a little excess flux on the bottom. These trimmers
> are hand-soldered after the rest of the board is complete, so they do not
> look as nice as the other solder but they should work okay. IC 31 is ugly.
> Remove it and remove the socket it is in, and any excess solder and wires
> that were added in the original repair attempt. Put in a new socket and
> start checking connections on the data lines (D0 - D7). You can use the
> ohm-meter part of your multimeter to check connections from IC31 to all
> other chips that it is supposed to connect to. I do not think there is any
> way to test IC 24 and 26 with a multimeter. You would need an oscilloscope
> to see what is going on. If you need to replace them, the standard part
> number is 4011. Always put any new chips in a socket.
>
> Maybe you should describe to us what kind of problems you hear right now.
>
> The Q1 pictures are not focused, so I can't tell if it looks bad. If you
> have problems with the LFO (MG) after everything else is fixed, it may need
> to be replaced.
>
>
>
> Don Backshall
>
>
>
> _____
>
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> iorlovs
> Sent: Thursday, April 11, 2013 5:35 AM
> To: PolySix@yahoogroups.com
> Subject: [PolySix] Please HELP Korg Polysix KLM367a Repair
>
>
>
>
>
> I bought Korg polysix and want to replace ic31 chip and battery but i have
> inspecting KLM 367a board and find bad things
> Do i need to replace VR1 to VR 7? (under the board they are looking bad)
> IC24 and IC 26 (HD14011BP) corrosion on the one of each legs,do i need to
> replace them or just re-solder?
> And GR is bad how i can see. (Q1 GR - K30A GR11) (under the board they are
> looking bad)
> Just want to know what i should replace and where i can find to buy all this
> stuff if i need?
> Maybe i can test all of them with multimeter?
> Here is a pics of board
>
> http://groups.yahoo.com/group/PolySix/photos/album/1588581670/pic/list
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
I bought ic31 chip socket and chip so i going to change them and i will clean all board with Isopropyl alcohol spray.So i need remove all wires and check connections.At the moment i not going to change ic 26 and 26 they should be ok. At moment my synt are disassembled, cant check what it sound but was strange and the memory not working.thanks for reply, you helps me