Go Back   IceInSpace > Equipment > ATM and DIY Projects

Reply
 
Thread Tools Rate Thread
  #1  
Old 23-05-2016, 07:44 AM
bojan's Avatar
bojan
amateur

bojan is online now
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,172
Canon 450D repair and IR modification

While waiting for parts for 400D to arrive, I started to work on 450D.
This camera was described on ebay as faulty, with SD card reader problem

After dismantling, it became obvious what was wrong - it seems camera was splashed with sea water (most likely.. I also found inside a lot of sand particles clinging on exposed edges of sticky tapes... luckily the shutter is OK), some of it came between battery compartment and SD card reader (SD card door was also hard to move and diopter button next to optical viewer was completely clogged with brown rusty substance).. and couple of tracks on PCB were eaten away, starting from inside plated via hole (obviously, the quality of PCB manufacture was not brilliant, as via were not tinted properly).
Anyway.. against everything I know about best professional repair practices, I decided to fix this particular board, as it didn't look damaged beyond repair.
One of the data lines was easy - since the copper inside via was completely turned into green crystalline (and non-conductive) stuff, I cleaned the hole with 0.3mm diameter steel wire and then simply inserted and soldered a strand of plated copper wire (from IDC cable) on both sides.

The other two damaged via were more difficult - they went from bottom side of the board to top side, but under the SD card slot. So I decided to remove it to see where the tracks are ending (the slot was also slightly corroded, so I was thinking, it is not a big deal if I damage it in the process, especially because they are available on ebay for ~$5 each). However, after removal it was left in a pretty good shape and useable... but I will still replace it with new one.

This kind of work can not possibly be done without good stereo microscope (20~30x)... Good soldering iron is also important (I have Weller, magnastat, with sharp tip #7)... and steady hand of course.
Attached Thumbnails
Click for full-size image (ScreenHunter_03 May. 23 07.20.jpg)
197.4 KB28 views
Click for full-size image (ScreenHunter_02 May. 23 07.19.jpg)
96.5 KB27 views

Last edited by bojan; 23-05-2016 at 08:26 AM.
Reply With Quote
  #2  
Old 23-05-2016, 08:38 AM
glend (Glen)
Registered User

glend is offline
 
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 5,737
So Bojan is the SD board working after that? I have a faulty processor board, it has a broken lock bar on a ribbon cable connector, can you fix that? We might be able to do a swap.
Reply With Quote
  #3  
Old 23-05-2016, 08:58 AM
bojan's Avatar
bojan
amateur

bojan is online now
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,172
Glen,
I believe it will work, I am just waiting for new SD slot to arrive (next week hopefully).

Yes, I am pretty sure I can fix the broken lock bar, they are pressed/clicked into receptacle of the connector frame.. do you have a connector replacement?
Send me a pic so I can see which connector we are talking about and in what shape is the rest of it.
Reply With Quote
  #4  
Old 30-05-2016, 11:06 AM
bojan's Avatar
bojan
amateur

bojan is online now
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,172
Anybody knows anything about this (Rocolax) filter?
I am planning to use it as a drop-in filter for my Canon 400mm F2.8 lens, on ebay it is only AU$78 (+ waiting)
Looks like people did use it successfuly..
https://stargazerslounge.com/topic/1...d-modded-dslr/


Hoya also has filters that may be suitable:
http://www.hoyafilter.com/hoya/produ...lters/uvircut/
I couldn't find price info.

EDIT:
It seems Rocolax is slightly inferior, compared to Hoya.
But price/performance ratio is most likely superior, see here (from UV_IR_cut):
http://www.uvircut.com/48mm-optical-...ens-p-253.html
Attached Thumbnails
Click for full-size image (Rocolax.jpg)
54.1 KB27 views
Click for full-size image (HOYA_uv-ir_curve.jpg)
20.0 KB32 views

Last edited by bojan; 30-05-2016 at 01:49 PM.
Reply With Quote
  #5  
Old 18-06-2016, 09:35 AM
bojan's Avatar
bojan
amateur

bojan is online now
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,172
The new SD slot arrived, and after soldering it in place the camera works OK.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 02:06 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Lunatico Astronomical
Advertisement
Astromechanics
Advertisement
Bintel
Advertisement
Testar
Advertisement
Astronomy and Electronics Centre
Advertisement