Search found 13 matches
Changeup
I would like to change my DSO138 LED the green lamp for a brighter one. I saw one online I wanted. They were rectangle 2mm wide and 4mm long. Does anyone know this ? Picture attached
KIT DSO
Where can the schematic for DSO-Shell DSO150 15002k be found?
Diode
If you only have silicon diodes; but need some germanium diodes; what could be done to modify those silicon diodes? If this modification deals in doping, what technique has to be used?
i
i this
i
i this
- Fri Aug 31, 2018 12:28 am
- Forum: DSO138
- Topic: +3.3v not simple
- Replies: 3
- Views: 5023
Re: +3.3v not simple
Rainer I believe your diagnosis is on the QT. I open J4 and tested U1 pin9 : D3 anode: JP4 the right point; J6 pin1, all were shorted. So now what can be done? I can not see though the replacement of U1. Can you? If you can, how? Viewv
- Fri Aug 24, 2018 11:20 pm
- Forum: DSO138
- Topic: +3.3v not simple
- Replies: 3
- Views: 5023
+3.3v not simple
My DSO138 has a problem I found was not simple. The +3.3v is short to ground. I first tried fix it by replacing U3. This did not fix the problem. So I removed other part in the area and test them with my meter. Parts tested good. I wanted to test U1 for the short, I had no way of doing this. Can any...
Re: Tools
To view when need.
Re: Tools
I found this circuit which test Xtal . No explanation how it works. Does anybody have any idea how it work?
Tools
When no display, what tool must be used to check Y1?
- Wed Apr 18, 2018 12:36 am
- Forum: DSO138
- Topic: DOS TRACE VOLTAGE
- Replies: 2
- Views: 4129
Re: DOS TRACE VOLTAGE
This one is a hard one to find.
- Fri Mar 16, 2018 6:46 pm
- Forum: DSO138
- Topic: DOS TRACE VOLTAGE
- Replies: 2
- Views: 4129
Re: DOS TRACE VOLTAGE
I just got the traces, and man are they pretty. I can trace more. If you think the schematics are something, wait till you view the trace circuit.