younghome

21 hours ago, malc-c said:

D3 is a diode that is used in the communications circuit.  A 1n4148 signal diode should do the trick.  If surface mount devices are a problem just bodge it with a through hole variant

thank you very much,I will buy a new diode

On 08/06/2021 at 21:28, malc-c said:

Yes, the code protect registers are set in the binary files.  The process of using the PYTHON scripts as mentioned a few pages back to convert the BIN file to HEX and then using MPLAB to change the code protect bits and then re-export the HEX as an unprotected version is required.  But as the code includes the bootloader so the SW update software can recognise the board and upload the BIN file on the fly there should be no need to reprogram them, or try and read back the HEX form the existing PICs.

I was going to suggest using something like GSServer and a true EQDIR cable, but the mount isn't an EQ mount so that wouldn't work as it would still move the scope in strange directions.  

Just in case there was some corruption in the file, I've run through the routine again and produced the attached....  Don't be put off by the MC004 reference - that was due to the previous repairs - there is only one version of firmware for goto dobsonian scopes and that's the 2.09 file, which this was based on.

MC004Final.hex 46.48 kB · 30 downloads

Hello brother

I had the same problem at my skywatcher dob8 with goto(plugged the USB to RJ12 cable from PC into mainboard),but i found the "D3" in my board(photo below)was burned,do you know what is this IC and what is it's size or parameter？

I'm very very very thank you