Connect with us

Ibm p202 problems

Discussion in 'Electronic Repair' started by Chance, May 20, 2006.

Scroll to continue with content
  1. Chance

    Chance Guest

    Hi
    I have an IBM p202 that has problems at some scan rates it has a pin
    cousion problem, (sides bowed in) pin cusion correction has no effect
    when the fault is present. also at most scan rates it has a horizontal
    flickering lines. Both problems clear up if the moniter warms up.
    Someimes it will jump between normal and bad pincusion rapidly as it
    warms up. Here is what I have tried so far. I took it apart and found
    a section of the D board that was heat sensitive. Heat it with hair
    dryer it clears up almost instantly, blow cool air on it with hair
    dryer it starts messing up almost as fast. I suspected bad elerolitic
    caps replaced all of them in this area, still has same problems. This
    board has SMT components on the bottom of board I didnt mess with them.
    I didn't notice any bad solider joints. Poking and prodding the board
    didn't seem to have an effect on the problems. Any suggestions besides
    toss it to the curb or take it to a tech?
     
  2. Dave D

    Dave D Guest

    Switch the monitor off. Pick out a component on the faulty board and heat it
    with the tip of a soldering iron. Switch monitor back on and see if fault
    clears. Repeat until you find the bad component. You can use a can of freeze
    spray alternately with the heat to confirm the bad part.

    I'd certainly want to reflow all the solder joints with fresh solder though.
    Electrolytic caps would be my first suspect, but as you've eliminated them
    bad solder joints are a strong possibility.

    Dave
     
  3. JANA

    JANA Guest

    Some components, especially capacitors have become thermo sensitive. The
    fault is most likely in the pin amp and horiz scan areas.

    We normally use a heat gun and freeze spray to troubleshoot for this type of
    fault.

    --

    JANA
    _____


    Hi
    I have an IBM p202 that has problems at some scan rates it has a pin
    cousion problem, (sides bowed in) pin cusion correction has no effect
    when the fault is present. also at most scan rates it has a horizontal
    flickering lines. Both problems clear up if the moniter warms up.
    Someimes it will jump between normal and bad pincusion rapidly as it
    warms up. Here is what I have tried so far. I took it apart and found
    a section of the D board that was heat sensitive. Heat it with hair
    dryer it clears up almost instantly, blow cool air on it with hair
    dryer it starts messing up almost as fast. I suspected bad elerolitic
    caps replaced all of them in this area, still has same problems. This
    board has SMT components on the bottom of board I didnt mess with them.
    I didn't notice any bad solider joints. Poking and prodding the board
    didn't seem to have an effect on the problems. Any suggestions besides
    toss it to the curb or take it to a tech?
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-