Connect with us

where can I find a resistor value?

Discussion in 'Electronic Repair' started by Aaron Solochek, Dec 27, 2003.

Scroll to continue with content
  1. In my continuing saga to fix this sun/sony gdm-20d10 I pulled out the D
    board to look for capacitors to replace. I noticed a burnt up resistor,
    which completely open:

    http://www.aberrant.org/~aarons/img_1869_small.jpg
    http://www.aberrant.org/~aarons/img_1867_small.jpg
    (remove the small for the fullsize image)

    The colors are hard to tell in the image, but they appear to be orange
    black brown gold, for a 300 ohm. Before I go and replace this, I'd like
    to know what the value is really supposed to be, since what looks like
    orange might be brown, and what looks like brown, might be purple. If
    anyone knows where I can lookup R050 for this monitor, I'd appreciate it.

    My other fairly obvious concern is "why did this resistor fry?" There's a
    cap (C040, 160V 4.7uF) which is on one of the nodes, so I'll probably
    replace that just for good measure. Everything else on the board looks
    perfectly fine, so testing this seems difficult.

    Thanks.

    -Aaron
     
  2. Impmon

    Impmon Guest

    One thing for sure, they appear to be flameproof resistor. Unfortunately
    it's hard to tell the color for sure. It looked brown-black-brown-gold to
    me (100 ohms)
     
  3. John Keiser

    John Keiser Guest

    Several years ago I had a possibly similar problem with Sony GDM 20E01.

    Sony [Honolulu] kindly gave [free!] me a copy of the schematic for D board.
    I checked but the components are not numbered the same as yours so I can't
    tell you the exact value of R050. Perhaps your local Sony repair center
    will be as helpful as mine was.

    My burnt resistor [R 851] was near the flyback.

    Cause was a failed ceramic cap [C822] which was hard to find as it was
    wedged between other components. Disintegrated when I finally saw it and
    wiggled. I also had a blown micro-fuse down the line [which protected
    everthing else - they sure don't engineer them this well anymore].

    You might check for a bad cap + fuse.

    The people on this forum very very helpful in walking me through this
    repair.

    Good luck.
     
  4. Asimov

    Asimov Guest

    "John Keiser" bravely wrote to "All" (27 Dec 03 08:29:40)
    --- on the heady topic of "Re: where can I find a resistor value?"

    JK> From: "John Keiser" <>

    JK> Several years ago I had a possibly similar problem with Sony GDM
    JK> 20E01.
    JK> Sony [Honolulu] kindly gave [free!] me a copy of the schematic for D
    JK> board. I checked but the components are not numbered the same as yours
    JK> so I can't tell you the exact value of R050. Perhaps your local Sony
    JK> repair center will be as helpful as mine was.

    JK> My burnt resistor [R 851] was near the flyback.

    JK> Cause was a failed ceramic cap [C822] which was hard to find as it was
    JK> wedged between other components. Disintegrated when I finally saw it
    JK> and wiggled. I also had a blown micro-fuse down the line [which
    JK> protected everthing else - they sure don't engineer them this well
    JK> anymore].

    I hate to see things wedged like that too. Tight spaces are a problem
    for parts that dissipate some heat such as a lossy ceramic might. One
    tip that may alleviate the heat problem is to mount the replacement cap
    on the trace side of the pcb instead, space allowing of course.


    JK> You might check for a bad cap + fuse.

    JK> The people on this forum very very helpful in walking me through this
    JK> repair.

    JK> Good luck.

    JK> --
    JK> Remove -NOSPAM- to contact me.

    .... You may be a tech if you're entertained by a 6-pack and sparking HV.
     
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

-