Improvents tips, new Hardware, players from Denon this year?

[Ghiata_Loredan]

@NoiseRiser

Can you elaborate on that? Motor is running on 8 pole brushless system driven by PWM, similar to turntables. If you say that buck converter fails, did you measured the voltage that it spots out? Hook up an oscilloscope and check if it’s stable. PWM drive of the motor has big enough capacitors to compensate some fluctuations.

Sc6000m updating motor to 04.04

It is a Hardware problem, the buck converter that steps up the voltage from the 19V to 28V for powering the motor has failed. The output fets of this buck converter are getting shorted due a design flaw that has inaadequate cooling, when the fets gets shorted, it shorts the D1 and burn the R282 current sense resistor. D1 is : https://ro.mouser.com/ProductDetail/863-MBRA140T3G Fets Q52 and Q51 are : https://ro.mouser.com/ProductDetail/595-CSD18543Q3A Current sense resistor R282 is: https://ro.m…

Check this thread about the motor failure.

Also check this to proper changer the lube to prevent damage to axial bearings.

S5000M Maintenance — Bright Dot Design

@NoiseRiser

That is not possible. Resonant frequency of that foil is way above mid range. Test it without the plater and the whole assembly. Bass will not vibrate it. The platter is mostly prone to low frequency vibration - but that is exactly same phenomenon as every turn table has on stage. That’s why turntables are sitting on the cushions on stage.

1. Drill a hole in the plastic cover of the motor cover that cover tha foil.
2. Stick a microcamera with led light on the tip in the hole.
3. Place a player close to a subwoofer.
4. Turn the subwoofer ON and play some music
5. Observe the foil, you will be surprise, but it vibrates the crap of it.
6. Put the osciloscope probe to the sensor that picks up the rotational position for the platter.
7. Turn the motor on, and observe the waveform on the osscilocope with the subwoofer ON and subwoofer Off, you will be suprised how altered is the waverform signal with the subfwooer ON.

I have done this debug / test several times to debug the problem. The problem is from the motor asemmbly design, needs to be updated.

@NoiseRiser

This is interesting part. Did you re-write the data base coding, and player firmware on how it handles that data base? I like to know more on this topic.

I didn’t rewrite / modified anything, just tested behavior with older firmware version and newer, it looks like the sistem runs out of ram very quickly with new version of firmware.