DSO5102P Rotary knobs not working

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 18:30:27

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

post deleted

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 2020-8-23 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

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?

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.

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.

don.r · Post time 2020-7-9 06:50:33

Problem is U2 on front panel board. Try reflowing decoupling caps on both 74HC4051 mux/demux chips and pins 1 and 2 of U2 (rotary encoder signal pins). My scope DSO5102P now works (mostly).

OASJ2YSeeEhBQo1 · Post time 2020-7-9 00:38:57

Edited by OASJ2YSeeEhBQo1 at 2020-7-17 08:35

Check this thread on EEVblog, someone had a similar problem and fix it by re-soldering some ICs on the keypad board: https://www.eevblog.com/forum/testgear/hantek-dso5102p-(5202p-firmware)-stuck-on-auto-set/

wangshuang · Post time 2020-7-8 14:59:20

olrn replied at 2020-6-10 22:00
Hello,
I have the exact same issue on my dso5202p. It is very little used. Tried re-conneting the ke ...

It is recommended to check the relay.