> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
> Gesendet: Mittwoch, 15. Februar 2017 13:57
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: [Doepfer_a100] A-110-4: LED for negative part is OFF most
> of time
>
>
> Dear Dieter,
>
> Thank you very much for the suggestion. As a weekend DIYer, I have
> built a handful of thru-hole-component modules. So I will definitely
> try to replace the LED (of course, before doing that, I will collect
> information to make sure that I should be really skeptical about it).
>
> Doepfer oscillators are always my first choice to play with me. I
> really love your products. Thank you for producing A-100 modules, and
> I am looking forward to seeing the new 110-6 oscillators!
>
> Best Regards,
> Ryuichi Tamura
>
>
> 2017-02-15 17:48 GMT+09:00 yahoo@doepfer.de [Doepfer_a100]
> <Doepfer_a100@yahoogroups.com>:
> > Sounds to me like a defective LED. If you are familiar with
> soldering and
> > electronics you may try to replace the LED by another dual type, e.g.
> > red/green or red/yellow (the white/blue dual LEDs are hard to
> find and is a
> > custom made product).
> >
> > Best wishes
> > Dieter Doepfer
> >
> >> -----Urspr�ngliche Nachricht-----
> >> Von: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
> >> Gesendet: Mittwoch, 15. Februar 2017 01:14
> >> An: Doepfer_a100@yahoogroups.com
> >> Betreff: Re: [Doepfer_a100] A-110-4: LED for negative part is OFF most
> >> of time
> >>
> >>
> >> Dear Dieter,
> >>
> >> Thank you very much for your kind reply. Yes, with no signal being fed
> >> in LFM, the led of my 110-4SE does not light up in white for LFrq
> >> positioned in the negative range. This is the issue of my unit
> >> (although the FM sound from it seems fine..) Following your insight,
> >> my unit is still defective. So I will have to find a way to repair it.
> >> Thanks again for your support.
> >>
> >> Best Regards,
> >> Ryuichi Tamura
> >>
> >> 2017-02-13 21:24 GMT+09:00 yahoo@doepfer.de [Doepfer_a100]
> >> <Doepfer_a100@yahoogroups.com>:
> >> > Hello,
> >> >
> >> > without external LFM signal the LED should light up white when
> >> you turn the
> >> > LFrq knob CCW. When you turn the LFrq knob CW the LED should
> light blue.
> >> > Otherwise the module is defective and has to be repaired.
> >> > As soon as an external LFM signal is applied the blue/light
> >> share depends
> >> > upon the position of the LFrq knob and the LFM level.
> >> >
> >> > Best wishes
> >> > Dieter Doepfer
> >> >
> >> >
> >> >> -----Urspr�ngliche Nachricht-----
> >> >> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]
> >> >> Gesendet: Montag, 13. Februar 2017 09:00
> >> >> An: Doepfer_a100@yahoogroups.com
> >> >> Betreff: [Doepfer_a100] A-110-4: LED for negative part is
> OFF most of
> >> >> time
> >> >>
> >> >>
> >> >> Hello there,
> >> >>
> >> >> This is my first post, and I am sorry for writing message
> as follows.
> >> >> But, I would like to have any advice or suggestion for my A-110-4SE,
> >> >> which seems to malfunction.
> >> >>
> >> >> A few months ago, I accidentally touched its circuit board while it
> >> >> was powered. Since then my A-110-4 did not generate the
> negative part.
> >> >> Specifically, with Lfrq knob being around the center, only the half
> >> >> (from the positive part) of modulation was heard. It
> sounded like "the
> >> >> half of the modulation is gone." The bicolor led was only
> lit in blue
> >> >> when the positive part is modulated.
> >> >>
> >> >> As I have no knowledge about the circuit, all I could do was to
> >> >> replace all ICs with the new ones, and I did. After
> replacing all the
> >> >> ICs, and all the calibration procedures documented in
> >> >> "A110_4_trimming_potentiometers.pdf" being done, the unit seemed to
> >> >> revert to its healthy state, in terms of the sound I heard.
> >> >>
> >> >> However, the led still does not work properly. The led is
> *rarely* lit
> >> >> in white. Currently, the led is either lit in blue, or off
> most of the
> >> >> time, and occasionally lit in white.
> >> >>
> >> >> So, my concern is that this irregular behavior the led may cause
> >> >> another trouble or fault. Is it ok to keep using it, or is
> there any
> >> >> part in the circuit I should investigate, or is it better to ask the
> >> >> Doepfer for repair?
> >> >>
> >> >> Thank you very much.
> >> >>
> >> >> Regards,
> >> >> Ryuichi Tamura
> >> >>
> >> >>
> >> >> ------------------------------------
> >> >> Posted by: Ryuichi Tamura <ry.tamura@yahoo.com>
> >> >> ------------------------------------
> >> >>
> >> >>
> >> >> ------------------------------------
> >> >>
> >> >> Yahoo Groups Links
> >> >>
> >> >>
> >> >>
> >> >
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > ------------------------------------
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > Yahoo Groups Links
> >> >
> >> >
> >> >
> >>
> >>
> >> ------------------------------------
> >> Posted by: Ryuichi Tamura <ry.tamura@yahoo.com>
> >> ------------------------------------
> >>
> >>
> >> ------------------------------------
> >>
> >> Yahoo Groups Links
> >>
> >>
> >>
> >
> >
> >
> > ------------------------------------
> >
> > ------------------------------------
> >
> >
> > ------------------------------------
> >
> > Yahoo Groups Links
> >
> >
> >
>
>
> ------------------------------------
> Posted by: Ryuichi Tamura <ry.tamura@yahoo.com>
> ------------------------------------
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>