Page 1 of 3 123 LastLast
Results 1 to 10 of 29

Thread: Well , I just toasted my 595 I just got ... HELP

  1. #1
    Join Date
    Nov 2007
    Location
    Iowa - Gods country
    Posts
    850
    Post Thanks / Like

    Default Well , I just toasted my 595 I just got ... HELP

    Ok , as stated above , I toasted the 595 board . All the chips just got hotter than hot .
    Soooo ...
    Now , I need to know where , and the part numbers , where I can get new chips ( and also , if anyone thinks the resistors went as well )
    Thanks

  2. #2
    Join Date
    Jun 2007
    Location
    Charleston, SC
    Posts
    292
    Post Thanks / Like

    Default

    I'll bite. How did you go about doing that? Sorry to hear that it happened.

  3. #3
    Join Date
    Nov 2007
    Location
    Iowa - Gods country
    Posts
    850
    Post Thanks / Like

    Default

    Guess hooking up the pin configuration from the Rj45 to the DB25 wrong ?
    Only thing I did wrong ( I think .... since there are more than one way to hook them up - and in the WIKI it tells you color coding , which was also not the way mine was/is . )

  4. #4
    Join Date
    Jun 2007
    Location
    Charleston, SC
    Posts
    292
    Post Thanks / Like

    Default

    First step of course before fixing the broken unit is finding the cause of it having broke. ;)

    Do you have the ability to take pictures? Take pictures of the RJ45 end of the cable (I'm assuming you just took a patch panel cable and chopped one end off of it to then install the DB25 to that end) so the colors can be seen. Perhaps a second set of eyes for you.

    So the CAT5 isn't following the GOBR (green, orange, blue, brown) standard?

  5. #5
    Join Date
    Jun 2007
    Location
    Ft. Walton Beach, FL
    Posts
    1,502
    Post Thanks / Like

    Default

    I would think the only way to smoke the chips like that would be either to have the 5 VDC and GND reversed or have the 5 VDC shorted to GND.

    I had a Ren-64 that one of the outputs to the SSRs had a short between 5 VDC and GND and the PIC controlling it got real hot and the pcb started to smoke before I caught it. Lucky for me nothing was damaged too much.

    You definitely need to get your multimeter out and check your wiring and your board for shorts or mis-wires.
    RavingLunatic
    Not just a username but a state of mind

  6. #6
    Join Date
    Nov 2007
    Location
    Iowa - Gods country
    Posts
    850
    Post Thanks / Like

    Default

    Sorry , the cam I have is far from good enough to take pics that clear .
    but , from what I can see , here is the order :
    having the front that inserts into the female end facing away from you going left to right:

    white/orange
    orange
    white/green
    blue
    green
    white/brown
    brown

    And , from what I know ... the number one would be the white/orange and number two - orange , and so on and so forth .

    that is why I inquired earlier , but there are a few different pinouts out there and guess I chose the wrong one to try

    What I did was not follow color coding , but rather pins to pins

    PARALLEL RJ45
    1 5
    2 8
    14 7
    18 3

    5 volt was hooked into externally from the PS from the computers regulated 5 volt supply line.
    When I first hooked it up , all the LEDs lit up ( power and all for the ouput to the SSR cat connectors , then , they kinda went out in groups of aprox 6
    And what I did for the parallel side was check each pin thru continuity test to make sure I had the correct wire for the correct pin .
    Pin1 = black wire
    Pin 2 = black/white wire
    Pin 14 = pinkish wire
    Pin 18 = yellow wire
    when viewing the DB 25 facing you , pin 1 is top left widest point .

  7. #7
    Join Date
    May 2007
    Posts
    5,341
    Post Thanks / Like

    Default

    Two different standards - Cat5 vs Cat5e, see

    http://en.wikipedia.org/wiki/Category_5_cable

    --

    Phil

  8. #8
    Join Date
    Nov 2007
    Location
    Groveland Florida, USA
    Posts
    65
    Post Thanks / Like

    Default

    You may of had pin 1 on the RJ45 tied to 5 volts and also had 5 volts from the computers power supply on P1 of the circuit board at the same time.
    [code]
    Powered by
    ____ ____ _______ _____________ _______
    \ \ / /| \ \/ /\_ _____\ \ \
    \ V / | |\ / | ___\_ / | \
    \ / | |/ \ | \/ | \
    \___/ |___/___/\ \/_______ /\____|__ /
    \_/ \/ \/
    [/code]

  9. #9
    Join Date
    Nov 2007
    Location
    Iowa - Gods country
    Posts
    850
    Post Thanks / Like

    Default

    .
    You may of had pin 1 on the RJ45 tied to 5 volts and also had 5 volts from the computers power supply on P1 of the circuit board at the same time.

    Nope ... no connection to pin1 on the RJ45


    Two different standards - Cat5 vs Cat5e, see
    So , from my reading though , there should ot have been any difference , since I went via the pinouts , not the colors .

  10. #10
    Join Date
    Jun 2007
    Location
    Lithgow, NSW, Down Under
    Posts
    885
    Post Thanks / Like

    Default

    I'd start by pulling the chips all out, checking the wiring for shorts in the signal cable.

    Then check the board for soldering shorts, especially between pins (I usually scrub my board (no chips in it of course) with a firm toothbrush to get rid of any loose dobs of solder I may have inadvertantly dropped on it.

    Put one pair of chips in, confirming the pin 1 location and then power up the board. Check the chip temps for the next 5 mins of power on. If they are OK, connect up the signal cable to the board only (not the PC) and wait. Check chips for 5 mins.

    Then connect to the PC and see how the chips are. If they are ok set up an 8 channel sequence in Vixen & give it a run. If it works, power down & add the next 2 chips & repeat until the board is populated and working, or you find a bad chip etc.
    2011: The year of the pixels, LED's and glowing balls!
    [url]http://www.lithgowlights.com/[/url]

Page 1 of 3 123 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •