On Thu, 05 Apr 2018 09:55:00 +0200, blisca wrote:

Pearpoint,model 494/04,part of S.C.S Ex94C1001 & 1002
http://s000.tinyupload.com/?file_id=...85001783462747

Repairing it requires to redraw and rebuild the PCB,it would be good if
someone has the spare part,or the service manual,because i could do errors
in redraw the burned tracks and vias

The best way would be to copy the PCB photographically, and make a new
PCB. However, if you want to try repair, find some thin sheet copper.
Draw the missing traces on the copper sheet. Cut out the semi
circular sections with an Xacto knife. Glue to the existing PCB. If
you overlap the new copper to the existing gold traces, you should
have a sufficiently good connection without soldering. Stained glass
copper tape should work.

You can also do this with aluminum foil duct tape, but will need to do
something to improve conductivity and prevent electrolysis. For dry
(no DC) connections, I dope the sticky glue back of the tape with
graphite powder.

Another approach would be to totally replace the PCB with a ribbon
cable. It appears to simply provide the ability to do multiple 360
degree rotations without binding. That's a useful feature, but
probably not a necessity for sewer inspections. Build an umbilical
cable between the electronics and the camera head that replaces the
function of the board. Either provide a mechanical stop that provides
over-rotation protection or just be careful when rotating. Hopefully,
you have room inside for the umbilical.

Good luck.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558