DSO5102P Rotary knobs not working

JIN64 · Post time 2020-7-13 22:11:33

OASJ2YSeeEhBQo1 replied at 2020-7-9 00:38
Check this thread on EEVblog, someone had a similar problem and fix it by re-soldering some ICs on t ...

The link does not work.

OASJ2YSeeEhBQo1 · Post time 2020-7-17 08:37:27

JIN64 replied at 2020-7-13 22:11
The link does not work.

Ok, I've fixed the link so you can simple click on that since copying the string and paste it on the address bar of your browser seems to hard.

Shoey · Post time 2020-8-13 20:41:46

Has anyone else been able to fix this fault? Seems to be a recurring issue, several threads about this.
I have so far tried:

Default setup
firmware update
self calibration
checked ribbon cable connection at keyboard PCB and motherboard
reflowed decoupling caps
reflowed ribbon connector on PCB
reflowed and later replaced U1, U2, and U3. (74HC393 and 2 x 74HC4051)
checked relay as previously suggested. Actuating fine and connections are good.
all diodes from rotary encoders fine.

3.2V to keyboard PCB from ribbon cable.

None of these steps have corrected the fault. As others have described: all push buttons respond fine, but no response at all from turning any rotary encoder.

Any suggestions on fixes, measurements?

user567121 · Post time 2020-8-23 23:28:16

Edited by user567121 at 2020-8-23 23:31

Shoey replied at 2020-8-13 20:41
Has anyone else been able to fix this fault? Seems to be a recurring issue, several threads about th ...

Hi all, any news on the rotary knob problem?? i got a dso5102p which was barely ever used and now i got no working knobs, sometimes just sumtimes one or two knobs (ChA or trigger) are working a bit but not accurate. Second issue i have is that i cannot update firmware since recent version from their page is not accepted. Error: 0xfe
my versions are sw: 3.40.0(180120.0) and hw: 1010xffff8108

wangshuang · Post time 2020-8-24 11:51:54

user567121 replied at 2020-8-23 23:28
Hi all, any news on the rotary knob problem?? i got a dso5102p which was barely ever used and now i ...

Please refer to these posts to solve your mentioned problem:
https://www.eediscuss.com/forum. ... &extra=page%3D1
https://www.eediscuss.com/forum. ... id=14945&extra=

user567121 · Post time 2020-9-6 18:30:27

Edited by user567121 at 2020-9-6 18:36

post deleted

user567121 · Post time 2020-9-6 18:31:13

Edited by user567121 at 2020-9-6 18:36

post deleted

user567121 · Post time 2020-9-6 18:32:27

Edited by user567121 at 2020-9-7 02:37

Thank you, i solved the usb format problem, the new firmware runs ok, the self calibration passes without errors (most of the time) BUT the knob problem still exists, knobs rotation works ~ 5% of the time, it doesn't feel like a bad contact
btw, i tried it multiple times to trigger the cause like a bad contact on the keyboard or bad connecteion on the cable, i have reflowed almost any solder point of any large part like mentioned on the U1 ic and more. The problem behaviour is still 100% the same (my greater fear was it could fail complete but the soldering was lucky)
What could be the cause? Interferences? They work just to fail seconds later without rebooting or barely touching it... I can't look it's own signals with only one scope..

Any Ideas?
Are there spare parts availible for a good price? Frontpanel/cable?
thank you very much for any help

SORRY for tripple-posting... site was stuck in loading

wangshuang · Post time 2020-9-8 15:59:46

user567121 replied at 2020-9-6 18:32
Thank you, i solved the usb format problem, the new firmware runs ok, the self calibration passes wi ...

You can contact seller for a new keyboard.

user567121 · Post time 2020-9-12 02:10:44

Edited by user567121 at 2020-9-14 06:16

wangshuang replied at 2020-9-8 15:59
You can contact seller for a new keyboard.

he may be dissapeared since his ebay shop is empty he is gone i guess in my case, anyone else supplying spare parts?