JYE Tech Forum

Hi, I am also facing the issue. It usually reboot. Sometime it can turn off. Once time, the whole system hang after rebooting and no trace at all. I think everything was reset at that time and some part of the circuit fall in to unstable. Fortunately, the DSO 068 can recover after sometime. As per m...

As per identified, the BOB5 JYE120 is malfunctioning.

While waiting for the BOB5 board, I used a temporary -5V source and the DSO068 work fine.

The picture is after calibration. I am not sure whether it is good or not because there was not much change in the wave form.

I removed BOB 5 board and supply 5+ power to BOB5, the out put voltage is 0.23V. It means that BOB 5 is faulty.

I de-soldered the C35 (in JYE 120) and checked, it is ok.
The diod D8 1N5819 seems ok.
C38 is ok.

The suspect component is U7, MC34063.

I am waiting for the support on the DSO 068.

According to the powering-up test 2, the Bob 5 board or C27 issue. And I found that there is output at the output of BOB5 board.

So they issue comes from the faulty of BOB5 board.

Attachment is for your reference.

Look forward to the suggestion.

Dear JYE, I have a problem with the kit. I have passed the power test 1. The LCD on ok and can adjust the encoder and see the menu. Power at +5V is ok, but the V- is around 0.68V. AV+ is ok, around 5V. I check the polarity of C27 and it is fine. I measure the power in Bob5, at pin 8 have power. Indi...