Search found 1221 matches
- Wed Aug 07, 2019 2:41 pm
- Forum: FG085
- Topic: Firmware revisisions
- Replies: 3
- Views: 26191
Re: Firmware revisisions
The version -135 is for PCB 109-08500-00P which contains change in the clock circuit to make the oscillator more reliable. It is identical to version -132 in performance. But version -135 can not run on the old board (109-08500-00G).
- Sun Jul 28, 2019 12:36 pm
- Forum: DSO138mini
- Topic: DSO 138mini no trace
- Replies: 3
- Views: 16147
Re: DSO 138mini no trace
The voltages were good and the trace was actually on the screen. So it looks the scope was working mostly. The issue could be connection problem with the probe or the input terminal. Please see related documents here https://jyetech.com/dso138mini-oscilloscope-diy-kit/ . The firmware was the most up...
- Fri Jun 28, 2019 3:02 pm
- Forum: DSO Shell
- Topic: Screen doesn't show anything, probably faulty product
- Replies: 5
- Views: 18228
Re: Screen doesn't show anything, probably faulty product
Did the LCD light up? When power was applied did you see the LED on PCB blinked? Please also check the voltages at the points marked V+ and +3.3V.
- Sun Jun 23, 2019 12:59 pm
- Forum: Wave2
- Topic: Only 1 channel working
- Replies: 6
- Views: 18012
Re: Only 1 channel working
It's the problem was found. For not fully assembled boards solder joints like this that are easy to access are not included in the production tests. They relies on DIYers to fix if problem arises.
- Sun Jun 23, 2019 3:11 am
- Forum: DSO 068
- Topic: Latest version of DSO 068
- Replies: 2
- Views: 16251
Re: Latest version of DSO 068
Please see attachment. The major changes were:
1 ) Use U5 for crystal oscillator instead of U4. U4 clock is driven by U5 pin 12. This makes the clock more reliable.
2 ) Deleted buzzer circuit which is not related to oscilloscope operation.
1 ) Use U5 for crystal oscillator instead of U4. U4 clock is driven by U5 pin 12. This makes the clock more reliable.
2 ) Deleted buzzer circuit which is not related to oscilloscope operation.
- Sat Jun 22, 2019 1:54 am
- Forum: Wave2
- Topic: Only 1 channel working
- Replies: 6
- Views: 18012
Re: Only 1 channel working
Thank you for the details. It looks the connection from Ch1 analog channel output to the ADC input on the main board was open somewhere. The screen displayed CH1 waveform as if no analog board connected. It is suggested to check the connection from the point V14 at analog board to U1 pin10 on the ma...
- Tue Jun 18, 2019 10:14 pm
- Forum: Wave2
- Topic: Only 1 channel working
- Replies: 6
- Views: 18012
Re: Only 1 channel working
Can you post more details? Did you check with or without probe? Try touching the center conductor of the BNC connector with a screw driver and check if you can see any activity on screen. Also make sure the voltages at analog board check points are correct.
- Sat Jun 15, 2019 1:37 pm
- Forum: Wave2
- Topic: splash screen info vs info page
- Replies: 1
- Views: 12661
Re: splash screen info vs info page
This shouldn't be the case. There is only one copy for the firmware version. Can you double check and confirm? Thanks.
- Sun Jun 09, 2019 3:13 pm
- Forum: DSO Shell
- Topic: Sin cambio en la forma de onda de 1.V a 2.V
- Replies: 3
- Views: 7514
Re: Sin cambio en la forma de onda de 1.V a 2.V
It looks the problem was SENSEL0 which was stuck at 0V. This explains the measurement results.
- Mon Apr 08, 2019 6:21 pm
- Forum: DSO Shell
- Topic: Strange behavior of test signal
- Replies: 6
- Views: 9443
Re: Strange behavior of test signal
When the amplitude display is on pressing ADJ should toggle signal level as well as the display. When the amplitude display is off pressing ADJ won't affect the signal level. It will turn on or off fast adjustment mode. The signal level will keep the last setting before the amplitude display was tur...