Hi, Great!! That's good information, I'll do the tests with my scope and let you know, thanks, Han. --- In PolySix@yahoogroups.com, Johannes Hausensteiner <johau@g...> wrote: > > Hi, > > I do not want to discouorage you, but I do not believe that it is > the KLM-367's CPU. This does only the programmer. You can check > it very easily: > 1) If you have an oscilloscope, put one probe to TP4 and trigger > on this signal. There should be a narrow pulse about every 20msec. > The other probe connect to TP2. Obtain GND at TP3. > On TP2 you can see the multiplexed control voltages coming out of > the programmer CPU. Now turn knobs on the control panel and you see > a corresponding bar moving up and down between -5 and +5V. > 2) If you do not have an oscilloscope you can measure on CN05 (green > wires to KLM-366) single control voltages. The connector contacts > are labeled on the PCB, e.g. EG INT is pin10. Moving knobs on the > control panel should result in a moving corresponding control > voltage -5 ..+5V. > > If this does work then IC22 (8048 CPU) is OK. If not then you may want > to go for a new CPU, which can be difficult because you need a correctly > programmed CPU. Either you watch out for a cannibalised Polysix or you > get a 8748, which is the EPROM version of the chip. This can be really > difficult as it is very outdated. Nowadays people make their homebrew > micro stuff with PICs or the like. Then you have to have the programming > file a possiblity to program it. So before going through all this and > then finding out that it was not the reason it is worth to look a bit > deeper into it and check for other causes... > As I know from repairing some battery-leakage victims, IC31 is the first > candidate to be replaced. It acts as a data bus buffer and all the data > is passing through it. > An even more simple check of functionality of IC22 CPU is whether it is > possible to change patches in the sense that the correct LEDs within > the PATCH an BANK buttons come up. > If yes then IC22 is OK. > If no then first check for correct CPU clock and RST signals (perform > RESET adjustment as given in the service manual). > > If you have no sound at all for no obvious reason, check the Tape Enable > (nTE) signal, which comes from the TAPE ENABLE switch, disables the > overall VCA via IC5 and IC35 and holds the voices' gate latches (IC4, > IC5 on *KLM-366*) in reset state. > > Good luck! > > Johannes > > > > hansomchaam wrote: > > Hello, > > Every suggestion from everyone given to me (thanks) I have tried but > > still no sound. > > The problem seems to be in the 8048 processor on KLM367. The > > outputsignal on pin 19 (DB7) has his pattern but some levels are > > higher than + 5 volt, it looks like an open line (not terminated), > > when I pull down it (10 k) it's gone but why?? > > So I'm thinking on replacing the processor and asking is this still > > for sale somewhere (or replacement). > > Please give me suggestions (where to buy). > > Thanks, > > Han. > > --- In PolySix@yahoogroups.com, "FRANK SPANO" <fspa8724@m...> wrote: > > > >>Thanks, I'll try that > >> > >> > >> > >>>From: "lnz2166" <lnz2166@y...> > >>>Reply-To: PolySix@yahoogroups.com > >>>To: PolySix@yahoogroups.com > >>>Subject: [PolySix] Re: Polysix no sound > >>>Date: Tue, 06 Dec 2005 06:59:25 -0000 > >>> > >>> > >>> > >>> > >>> > >>>This might sound trivial but is your power supply output all in > >>> > >>>check. In addition have you checked the the solder pads on the > > > > power > > > >>>connectors. I had and issue with one poly6 where the 15v solder > > > > pad > > > >>>on the connector was lifted. Also do a sanity check and make sure > > > > you > > > >>>chips are all getting proper voltages. Check old crows site for a > >>> > >>>scanned service manual. > >>> > >>> > >>> > >>>http://www.oldcrows.net/ > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>>--- In PolySix@yahoogroups.com, "FRANK SPANO" <fspa8724@m...> > > > > wrote: > > > >>>>I have a similar problem. Does anyone have a scanned service > > > > manual > > > >>>I can > >>> > >>> > >>>>get emailed? Greatly appreciated > >>> > >>>>>From: "gil_we" <gil_we@y...> > >>> > >>>>>Reply-To: PolySix@yahoogroups.com > >>> > >>>>>To: PolySix@yahoogroups.com > >>> > >>>>>Subject: [PolySix] Re: Polysix no sound > >>> > >>>>>Date: Mon, 05 Dec 2005 08:56:38 -0000 > >>> > >>>>>I think the service manual have this information... > >>> > >>>>>--- In PolySix@yahoogroups.com, "hansomchaam" > > > > <hansomchaam@y...> > > > >>>>>wrote: > >>> > >>>>>>Thanks for reply, I fixed the battery problem as described. > >>> > >>>>>>I checked (again) all connections/signals with an > > > > oscilloscoop. > > > >>>>>>I don't see any output, also no gate signals when key- > > > > stroke on > > > >>>ic5 > >>> > >>> > >>>>>>KLM-366. > >>> > >>>>>>What shape must be on TP2 KLM367? > >>> > >>>>>>Thanks for your help. > >>> > >>>>>>Han > >>> > >>>>>>--- In PolySix@yahoogroups.com, "gil_we" <gil_we@y...> > > > > wrote: > > > >>>>>>>How are the main voltages ? Has the battery leaked ? > >>> > >>>>>>>--- In PolySix@yahoogroups.com, "hansomchaam" > >>> > >>><hansomchaam@y...> > >>> > >>>>>>>wrote: > >>> > >>>>>>>>Hello, > >>> > >>>>>>>>Again here is a polysix with the "no sound at all" > > > > problem. > > > >>>>>>>>When I measure with oscilloscoop on KLM366 (new) ic 9 > > > > pin 1 > > > >>>>>>there > >>> > >>>>>>>is a > >>> > >>>>>>>>constant pattern but not a 0.5 V/oct. Keystrokes has no > >>> > >>>effect > >>> > >>> > >>>>>>at > >>> > >>>>>>>all, > >>> > >>>>>>>>processor 8049 gives signals on DB0..DB8. Also no > > > > output on > > > >>>>>gate > >>> > >>>>>>>0...3 > >>> > >>>>>>>>= pin 15,10,7,2 ic 5 on keystroke. > >>> > >>>>>>>>Does anyone has suggestions. > >>> > >>>>>>>>Please help me, I look forward to hear the nice sound > > > > again. > > > >>>>>>>>Thans, > >>> > >>>>>>>>Han. > >>> > >>>>>PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6 > >>> > >>>>> YAHOO! GROUPS LINKS > >>> > >>>>> Visit your group "PolySix" on the web. > >>> > >>>>> > >>> > >>>>> To unsubscribe from this group, send an email to: > >>> > >>>>> PolySix-unsubscribe@yahoogroups.com > >>> > >>>>> > >>> > >>>>> Your use of Yahoo! Groups is subject to the Yahoo! Terms > > > > of > > > >>>Service. > >>> > >>> > > _________________________________________________________________ > > > >>>>FREE pop-up blocking with the new MSN Toolbar get it now! > >>> > >>>>http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>>PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6 > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> YAHOO! GROUPS LINKS > >>> > >>> > >>> > >>> > >>> Visit your group "PolySix" on the web. > >>> > >>> To unsubscribe from this group, send an email to: > >>> PolySix-unsubscribe@yahoogroups.com > >>> > >>> Your use of Yahoo! Groups is subject to the Yahoo! Terms of > > > > Service. > > > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>_________________________________________________________________ > >>Is your PC infected? Get a FREE online computer virus scan from > > > > McAfee® > > > >>Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp? > > > > cid=3963 > > > > > > > > > > > > > > > > > > > > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6 > > Yahoo! Groups Links > > > > > > > > > > > > > > > > >
Message
Re: Polysix no sound
2005-12-10 by hansomchaam