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2016-09-28 by somethingkillingyou@...
...turned on my K5, and just as I mentioned in the title, no sound and a blank display! yesterday it was fine.
tried to power on and off but nothing changed, except for one single time, when the display showed some garbage, then nothing... any hint? what could be?
Fabio
2016-09-28 by Daniel Forró
- power cable - fuse inside - power supply - el. caps, power regulators - check output voltages - transformer - lose connector - reseat - dirty or oxidized connector - c lean & reseat - damaged OS in Eprom - reseat all IC's in sockets - dead backup battery - replace it - garbage in RAM - send good data by MIDI, factory data for example here: http://www.kawaius.com/Downloads/download_archive-2.html - lot of other reasons... Daniel Forro On Sep 28, 2016, at 11:44 PM, somethingkillingyou@... [k5synth] wrote:
> ...turned on my K5, and just as I mentioned in the title, no sound > and a blank display! yesterday it was fine. > > tried to power on and off but nothing changed, except for one single > time, when the display showed some garbage, then nothing... any > hint? what could be? > > Fabio >
2016-09-28 by Alejandro Caceres
- power cable
- fuse inside
- power supply - el. caps, power regulators - check output voltages
- transformer
- lose connector - reseat
- dirty or oxidized connector - c lean & reseat
- damaged OS in Eprom
- reseat all IC's in sockets
- dead backup battery - replace it
- garbage in RAM - send good data by MIDI, factory data for example
here:
http://www.kawaius.com/Downloads/download_archive-2.html
- lot of other reasons...
Daniel Forro
On Sep 28, 2016, at 11:44 PM, somethingkillingyou@... [k5synth]
wrote:
> ...turned on my K5, and just as I mentioned in the title, no sound
> and a blank display! yesterday it was fine.
>
> tried to power on and off but nothing changed, except for one single
> time, when the display showed some garbage, then nothing... any
> hint? what could be?
>
> Fabio
>
2016-09-28 by JAMIE logan
test for blown fuses in supply then test for ripple no load test of psu. that would be the first thing to check once you have a healthy supply then move onto other parts 90% of the time its failing psu filter caps after the rectifier
> On 28 September 2016 at 16:30 "Alejandro Caceres accaceres@gmail.com > [k5synth]" <k5synth@yahoogroups.com> wrote: > > > > > > If all Daniel suggested fails, try checking the reset circuit, I posted a > sort of guide a while ago. Those reset ICs seem to fail from time to time, > specially if the you have a dodgy PSU (e.g. unstable Vcc due to bad supply > caps). > > PS before any major repairs, try everything Daniel mentioned, as your > problem is likely to be somewhere there. > > Good luck! > > On 28 September 2016 at 12:19, Daniel Forró danforcz@... > mailto:danforcz@... [k5synth] <k5synth@...m > mailto:k5synth@yahoogroups.com > wrote: > > > > > > > > - power cable > > - fuse inside > > - power supply - el. caps, power regulators - check output voltages > > - transformer > > - lose connector - reseat > > - dirty or oxidized connector - c lean & reseat > > - damaged OS in Eprom > > - reseat all IC's in sockets > > - dead backup battery - replace it > > - garbage in RAM - send good data by MIDI, factory data for example > > here: > > > > http://www.kawaius.com/Downloads/download_archive-2.html > > http://www.kawaius.com/Downloads/download_archive-2.html > > > > - lot of other reasons... > > > > Daniel Forro > > > > On Sep 28, 2016, at 11:44 PM, somethingkillingyou@... > > mailto:somethingkillingyou@... [k5synth] > > wrote: > > > ...turned on my K5, and just as I mentioned in the title, no sound > > > and a blank display! yesterday it was fine. > > > > > > tried to power on and off but nothing changed, except for one > > > single > > > time, when the display showed some garbage, then nothing... any > > > hint? what could be? > > > > > > Fabio > > > > > > > > > > > > > > > > > > > >
2016-10-04 by somethingkillingyou@...