T
Todd Oberly
Hello,
I have a Mistubishi AUM-1381 monitor that I bought used back in 95-96,
and it's finally dying. The picture has always been muddy, and
required jacking-up the Brightness and Contrast knobs to full to get
an acceptable picture. Now, though, it takes an extended time to
warm-up, and the contrast is dropping to black at a steeper and
steeper rate.
This model accepts both standard VGA frequencies and 15kHz television
frequencies, and I've been using it with a computer than makes use of
that flexibility. While I am tracking-down a replacement (probably an
NEC 3D/3DS), would somebody answer a couple really simple repair
questions? I have basic electronics skills, and am able to work
inside a monitor without killing myself, but have never done any work
with picture tubes.
1) This monitor's ability to do horizontal sync below 31Khz is a
function of its electronics and not the tube...correct?
2) If I were to attempt to repair it, would it require an exact
Mitsubishi picture tube replacement? If so, then what makes a
Mitsubishi tube a Mitsubishi tube? I'd think that both externally and
internally, most 14" tubes are very similar, and given its age, tend
to doubt it's using anything but shadow mask technology. If not, can
you give me some idea on how hard it would be to find something
compatible? Few companies are making 14" tubes anymore, but perhaps a
tube could be transplanted from another monitor?
3) Assuming the job simply requires swapping tubes (and this also
cures the muddness), what might a repair shop charge for this? The
labor charge alone may make it prohibitively expensive, but still
thought I'd give it a try...
Thanks,
Todd
I have a Mistubishi AUM-1381 monitor that I bought used back in 95-96,
and it's finally dying. The picture has always been muddy, and
required jacking-up the Brightness and Contrast knobs to full to get
an acceptable picture. Now, though, it takes an extended time to
warm-up, and the contrast is dropping to black at a steeper and
steeper rate.
This model accepts both standard VGA frequencies and 15kHz television
frequencies, and I've been using it with a computer than makes use of
that flexibility. While I am tracking-down a replacement (probably an
NEC 3D/3DS), would somebody answer a couple really simple repair
questions? I have basic electronics skills, and am able to work
inside a monitor without killing myself, but have never done any work
with picture tubes.
1) This monitor's ability to do horizontal sync below 31Khz is a
function of its electronics and not the tube...correct?
2) If I were to attempt to repair it, would it require an exact
Mitsubishi picture tube replacement? If so, then what makes a
Mitsubishi tube a Mitsubishi tube? I'd think that both externally and
internally, most 14" tubes are very similar, and given its age, tend
to doubt it's using anything but shadow mask technology. If not, can
you give me some idea on how hard it would be to find something
compatible? Few companies are making 14" tubes anymore, but perhaps a
tube could be transplanted from another monitor?
3) Assuming the job simply requires swapping tubes (and this also
cures the muddness), what might a repair shop charge for this? The
labor charge alone may make it prohibitively expensive, but still
thought I'd give it a try...
Thanks,
Todd
