Hello,
I recently bought a GPUSB from a classifieds section, and it doesn't seem to quite work. The issue is that the GPUSB will not guide in RA(+) and Dec(-), though it connects to GPUSB/PHD fine, I can control the LED and guide in the other two directions. It isn't a mount-related issue either since the ST-4 port on my mount is perfectly fine with my SSAG.
I've also checked the outputs on the GPUSB and confirmed that it is a GPUSB-related issue. I couldn't find any broken tracks on the PCB so am stumped. Has anyone else encountered this problem before? Perhaps the IC needs a re-flash?
Any help would be great, I really am keen on using the GPUSB
Regards,
Meru
GPUSB not guiding in RA(+) and Dec(-)
-
- Site Admin
- Posts: 1048
- Joined: Fri Apr 28, 2006 1:34 pm
- Location: central Iowa
- Contact:
Re: GPUSB not guiding in RA(+) and Dec(-)
The most likely cause is that the optocoupler (the tan colored component with 16 legs) that drives the outputs is damaged. This is a TLP627-4.
Re: GPUSB not guiding in RA(+) and Dec(-)
Hi Doug,
Thank for the prompt response. I'll be ordering the IC this week so hopefully should resolve it, I'll post the outcome
Thank for the prompt response. I'll be ordering the IC this week so hopefully should resolve it, I'll post the outcome
Re: GPUSB not guiding in RA(+) and Dec(-)
Hi Doug,
While the TLP IC is on the way here, I checked the inputs to the Optocoupler and turns out it is indeed the culprit, since the PIC is sending signals just fine. Thanks for the advice once again
While the TLP IC is on the way here, I checked the inputs to the Optocoupler and turns out it is indeed the culprit, since the PIC is sending signals just fine. Thanks for the advice once again