Recent content by Fumble

I was able to resolve this myself. A P821 protection diode in the dome power supply blew and clamped down. I got lucky, after replacing the 4 diodes everything is back up and running to where it was.

thanks for the positivity. seems nobody remembers me asking for recommendations of repair shop

I have another thermal camera to use for troubleshooting. It's not a short circuit, I blew at least the ethernet driver and other unknown components. I have been testing mosfets, resistors, capacitors, although in-circuit measurements are dicey. I found a similar optical only camera on eBay...

It has a 24VAC input pigtail on the top of the dome. It powers up when I inject 24VAC there, but it no longer establishes an ethernet link or powers up via PoE. I think I fried the main board, picture attached. Thinking of buying a similar model camera used off eBay and swapping the board...

I've been trying to recover a DH-TPC-SD8620N-B50Z30 via UART but accidentally injected too much voltage and damaged some ICs. I have no schematic and it's a multi-layer board but I think at a minimum the chip that interfaces with ethernet is fried. Is there anyone reputable I can send the board...

I didn't find the batch file in the TFTP download but I did try the one from Dahua IPC EASY unbricking / recovery over TFTP which includes a Python version which is what I'm using. Originally I was using Linux but I switched to Windows 10 to use the Hikvision TFTP tool you linked me to. I played...

I re-ran the UART serial exercise - I found ground and ran through every pin of every connector and still no output after printenv in my TFTP upgrade_info_7db780a713a4.txt. One thing I did notice is "S_CS" and "M_CS" may abbreviate system and motion serial console. This connector had two grounds...

Yep, you're absolutely correct. I setup TFTP and I can see it requesting the upgrade_info file: 01:35:59.654381 IP 192.168.1.108.netopia-vo3 > 192.168.254.254.tftp: 69 RRQ "upgrade_info_7db780a713a4.txt" octet timeout 1 tsize 0 blksize 1468 I dug deeper and found upgrade_info.py which will...

I'm trying to recover a DH-TPC-SD8620N-B50Z30. It's an expensive camera, so I've been going slow. I have a USB to TTL (CP2102 STC) adapter and I made a cable to connect GND, RX, and TX to what I believe to be the UART port. Now, I have 4 similar ports in the vicinity so I'm not sure if I'm...

I have a Hikvision 8MP Turret camera but I lost a few pieces of the mounting hardware and I can't put it up. I'm not able to find these parts for sale individually. I need the plastic bezel and the metal mounting plate.