: COMM-EVENT : COMM-ERROR: A break signal was detected. : COMM-STATE: 0 bytes waiting to be read 0 bytes pending for transfer.
This is after initial power on but nothing else happens.? : COMM-EVENT : COMM-ERROR: A break signal was detected. I use an emulator they sent me called SecureCRT. I do have all the voltages back now and look pretty good. Hello, Yes, it failed when I turned it on but nothing had come up on the screen yet. I would like to share with you and maybe we can get 'both" these things running? Who knows. Please let me know if you have any other options or ideas. However, you need to use the same case style that has the "isolated" case. I couldn't find the MOSFET so I just looked up one with about a 20A rating and used it. I'm waiting to see if I get anything back from Hantek on what they think, but it's difficult to anything out of them and I'm better they just tell me to send it in somewhere. It does nothing else, so I'm really at a loss as to what to do now. Well, I do get some "traffic" but I don't think it's anything meaningful at this point? It just does that and then halts.
REPAIRING PHOTOS LIBRARY MADE IT 0 BYTES SERIAL
I did that and I guess when you power up the board, you are supposed to get some traffic out that serial connection. I had been in contact with Hantek because they think I have a firmware issue? However, the gave me a process to wire a TTL to USB converter to the J801 points on the bottom board. I checked basically everything else in the circuit because I thought for sure, I had opened on of the coils, but it looked like they survived for some reason. What I did with mine was I used a 40 ohm on the gate lead and I found a 3 ohm chip R to use for the sense lead. I had to replace the 6850 PWM controller, the power MOSFET replace the burned trace on the back as well as the chip R's.
Well, I think I have finally got the power supply but the scope still doesn't boot up! Your issue is exactly what I had on mine. a +/-12v module swinging about 3v3 could give +15.3v/-8.7v for the analog stuff, provided the current requirement is suitably low. in theory it should be possible to cobble together something based upon buck/boost modules from ebay: a 7.2v NiMh battery pack (6-cells) bucked down to 5v with a LM2596 module, and then a linear regulator down to 3v3.
REPAIRING PHOTOS LIBRARY MADE IT 0 BYTES SERIES
if anyone reading this has a DSO5000P series scope that they have opened up, i'd be very keen to find out what the current draw on the various supply rails are, these being +14v, -8v (analog), 5v, 3v3. the scope belongs to a friend, and i've been discussing with him the idea of converting it to battery operation instead of repairing the PSU. i've had no luck finding a schematic beyond the info already provided to you by others. from the datasheet, it looks like the paralleled up value of the three R14 will be somewhere in the region of 0.5 to 2 ohm. C2 on the one here also looks suspect, and is the likely source of the smoke that the owner mentioned to me. i also suspect that the CR6850 is blown, along with the bridge rectifier. i also have some vapourised traces prior to the bridge rectifier. the 3x R14 resistors are fried, as is R11 (notice that your R11 is damaged too). Hi Lew1, i have an identical power supply to yours here, unfortunately with exactly the same failure mode.
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