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Pioneer rear projection convergence

Discussion in 'Electronic Repair' started by Jens Ratsey, Feb 7, 2004.

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  1. Jens Ratsey

    Jens Ratsey Guest

    I posted this to the home theater group too, but thought here might
    also be worth a shot.

    I have a Pioneer SD-P5183 rear projection TV that doesn't work
    properly after moving house. The red gun is way out of convergence on
    the bottom 3 cross hairs. The top and middle 3 are fine and the blue
    and green guns are fine across all 9 points.

    The convergence control on the remote doesn't seem to help. I took
    the back and the screen off the set hoping to find some manual
    adjustment controls, but can't find anything.

    The red gun is probably a good 1.5" too high. The mirror looks to be
    in place and all 3 colours are in focus.

    Can anyone offer any advice?

    J.
     
  2. Probably a bad convergence output and/or bad connections on the
    convergence assembly. 1.5" is way more than an adjustment.

    Alan Harriman
     
  3. Art

    Art Guest

    Bad output and probably poor spolder connections on the registration circuit
    pcb/
     
  4. Ampdoc

    Ampdoc Guest

    Replace STK4277SL on convergence panel. Resolder all bad connections on
    convergence assembly and power/deflection board. Then you will be good to
    go!

    --
    Jammy Harbin
    J & J Electronics, Inc.
    227 S. 4th St.
    Selmer, TN 38375
    731-645-3311
     
  5. Jens Ratsey

    Jens Ratsey Guest

    Thanks for the replies.

    I just called a local repair shop and Pioneer dealer. I described the
    problem and he estimated around $600 in repairs. He said he'd need to
    take out all the circuits and resolder everything, plus of course come
    and get the thing.

    The estimate has put me off that since I intend to replace the set
    eventually with a low to medium end overhead projector that seem to be
    around the $1,200 range. It's also no longer my primary set.

    I'm not a complete moron with a soldering iron and I'd be happy to
    check the boards myself if it weren't for the nasty voltages in a TV
    set. Someone suggested getting hold of a service manual - would I be
    able to do anything myself (remember I'm in NO way qualified as a TV
    repairman!) and if so, how would I go about getting one?

    Or is the box just destined for permanent retirement?

    J.
     
  6. Check around a little more. I think you could get it done for about half that. A
    convergence failure is a normally fairly routine repair. You don't necessarily
    have to go to a Pioneer ASC, but be sure they are familiar and have experience
    with your set. That's still a good model.

    Alan Harriman
     
  7. Ampdoc

    Ampdoc Guest

    Where are you locatd, if they're getting those rates for a 250-300.00 job I
    need to move!
    Stk4277 should be found for less than $80 and that's if they are marking it
    up a lot. They shouldn't have to even pick it up to fix that. Check
    www.pioneerelectronics.com for an ASC in your area.


    --
    Jammy Harbin
    J & J Electronics, Inc.
    227 S. 4th St.
    Selmer, TN 38375
    731-645-3311
     
  8. I'm on Long Island, NY in the Smithtown vicinity. The place I called was
    the first on the ASC list at PioneerElectronics.com. I'll try another one
    today.

    If there's anyone in the area who wants to make a quick buck let me know!

    J.
     
  9. Ken G.

    Ken G. Guest

    Here we go again with rip off repair shops ..
    getting the chassis out far enough to get the board out is quite a chore
    you have to take off alot of wires/plugs .
    If you can solder `very well` that may be all it needs . It would be
    hard to get shocked in a big screen tv set doing a convergence board .
    If you cant try to get help taking it to a reasonable repair shop to
    avoid their 100$ travel time .
     
  10. Ken - do you know where I can get hold of a service manual or a diagram of
    the internals so I'd at least know which board I was supposed to be looking
    at?

    I have the screen and back off the TV and it all looks reasonably easy to
    get to. Are there any obvious 'don't touch this' items (re voltages)?

    J.
     
  11. Ken G.

    Ken G. Guest

    Here we go again with rip off repair shops ..
    getting the chassis out far enough to get the board out is quite a chore
    you have to take off alot of wires/plugs .
    If you can solder `very well` that may be all it needs . It would be
    hard to get shocked in a big screen tv set doing a convergence board .
    If you cant try to get help taking it to a reasonable repair shop to
    avoid their 100$ travel time .
     
  12. Ampdoc

    Ampdoc Guest

    You can get the manual at:
    http://parts.pioneerelectronics.com/part.asp?productNum=ARP2880

    But you really don't need it for this, put the back back on, remove the
    speaker grille, remove 6 screws securing the cover underneath the grille,
    you will find the convergence PCB attached to that panel. Be certain to mark
    the wires when you unplug the panel as on some sets Pioneer did not
    color-code the plug and socket, make sure you reconnect them correctly. The
    STK is underneath the large heatsink, remove the PCB from the holder,
    desolder the STK leads, and then desolder the screw holding the heatsink,
    remove the 2 screws then heatsink & IC simultaneously, and replace with new
    STK! As to the other shop's estimate, it is possible you were being quoted
    for replacement of the entire convergence assembly, whitch is $226.00 Plus
    S&H, and return shipping for the core. If the board is replaced a set-up
    would need to be done, but if you only replace the IC 99% of the time you
    will be well within factory specifications and only need minor adjustments
    in the user menu. Some shops never learn to go to component level as
    Pioneer's warranty policy is board replacement.

    --
    Jammy Harbin
    J & J Electronics, Inc.
    227 S. 4th St.
    Selmer, TN 38375
    731-645-3311
     
  13. Thanks Jammy - that was exactly what I was hoping for. I'll take another
    look at the box later today and let you know how I get on removing the IC.

    J.
     
  14. Update ... I've got the convergence board out and located the STK. I don't
    see any STK 'leads' but I do see where it's soldered to the board. Will
    have a closer look.

    But the problem now is where to locate that part! I've searched online and
    everywhere that has it seems to have a minimum order value in the $350 -
    $500 range. Do you know where I can order it?

    J.
     
  15. Duh! I take it by leads you mean the 'feet' off the STK? Yep, found those.
    ;-)
     
  16. Check out Tritronics: http://www.tritronicsinc.com/index.html

    Alan Harriman
     
  17. Ampdoc

    Ampdoc Guest

  18. Thanks Alan - part ordered! A little more than the Pioneer site that Jammy
    mentioned but I'd already ordered it when his post showed.

    Be sure to check back here in a week or so after I've installed and and
    start asking ... "Now what?" ;-)
     
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