hi mate,
Thanks anyway for the help! Yep - it is a bit different model.
For me still all(!) the leds are on - 48, 5 and 3 on all the boards.I actually thought KD1 and KD3 have thermo sensor and KD2 and KD4 don't (based on the schema and what I see on the boards).
When I detach the blue signal connector fro the KD1 (which is most left board) the whole diagnostic fails then - all parameters for all entries are 0.
If I detach only 48V connector from the KD1 then there is no change in the diagnostic output: still have 0,48; 0,5, 3 and all 0 for loop check. So yep - it looks like it is KD1.
But I still cannot understand why it worked all for a moment when I only bent KD2 and KD3. Might be a coincidence though.
I'm looking here to rent an oscilloscope if it can give me a bit more visibility on the signals on the chip pins on each board to compare. But still could not find it for now...
Anyway - really big great thanks for offering help - I could not imagine there is a possibility to find used spare parts for disklavier. But for me I'm still looking what I can do for the next step to identify the issue.
Have a very nice day,
Dmitry
On Wed, Aug 9, 2017 at 12:54 PM, tnmshd@... [disklavier] <disklavier@yahoogroups.com> wrote:
[Attachment(s) from tnmshd@... [disklavier] included below]I've got used parts but it's not your type .
It's pro-series but not XP.parts are incompatible. so sory..I can get new parts from yamaha jp.they said price are KD 1,2,3,4 24494JPY(283AUD) each.(shipping cost extra)KD3&KD4 doesn't have thermal chip.I feel like KD1 has poblem in this case.How is KD board Led? red ,green,green .(48v/3.3v/5v)