monitors

R

Roy J. Tellason

Guest
Got three monitors here I'm getting ready to work on, and I'll be happy to
list specific symptoms if anybody cares to know. What I'm wondering about
at this point is whether service data is out there and readily available
without too much expense, or what. Ideally it'd be out there on the 'net
somewhere. <g> But if it's not too expensive it might be worth my while
to buy 'em.

I'm at the "I gotta fix these or get rid of them" decision point.

The monitors are:

NEC Multisync 3D (JC-1404HMA)
NEC Multisync 2A (JC-1403HMA)
Samsung Syncmaster 4 Plus (CCB-7571)

Anybody familiar with these?
 
Hi!

NEC Multisync 3D (JC-1404HMA)
NEC Multisync 2A (JC-1403HMA)
Click to expand...
Probably worth the fix unless something big has melted down inside...which I
doubt. I have lots of NEC monitors that I have been given and while some
have been broken, the repairs made have held up nicely. I bought a MultiSync
95 new a few years ago because I was so pleased with the used ones I was
given.

Samsung Syncmaster 4 Plus (CCB-7571)
Click to expand...
Total junk...probably one of Samsung's worst. They seem to keep running, but
I have a lot with bad focus, pictures that take forever to come up, or with
some colors too pronounced while others are fine. I also have a hard time
looking at them without getting a bad headache, and I know it isn't the
source of video that is the problem.

William
 
William R. Walsh wrote:

Hi!

NEC Multisync 3D (JC-1404HMA)
NEC Multisync 2A (JC-1403HMA)

Probably worth the fix unless something big has melted down inside...which
I doubt. I have lots of NEC monitors that I have been given and while some
have been broken, the repairs made have held up nicely. I bought a
MultiSync 95 new a few years ago because I was so pleased with the used
ones I was given.
Click to expand...
No, the 3D was in constant use here until I couldn't deal with the vertical
foldover (at the top) any more. You could adjust the size downwards and
it'd go away, leaving you with less than a full raster that was still
viewable. The monitor was attached to a BBS machine (717-838-8539 if
anybody's interested). The other problem with it was that it was not going
all the way to a solid black level, the backgrouns was too high. This
combination of symptoms leads me to suspect that there's a power supply
common to the vertical output stage and the CRT biasing, though I still
haven't gone into it yet, and don't remember ever getting into one of
these.

The other one, the 2A, simply displays but with insufficient width, and
some slight distortion in the raster. I've only ever turned it on once
since it was given to me a couple of years ago. I'm thinking low-voltage
power supply, or something screwy in the horizontal output circuit. One
of the reasons I'm interested in checking caps lately. :)

Samsung Syncmaster 4 Plus (CCB-7571)

Total junk...probably one of Samsung's worst. They seem to keep running,
but I have a lot with bad focus, pictures that take forever to come up, or
with some colors too pronounced while others are fine. I also have a hard
time looking at them without getting a bad headache, and I know it isn't
the source of video that is the problem.
Click to expand...
I'm real sorry to hear that, as that's the biggest one out of the bunch and
also promised the highest resolution out of any of them, 1280x1024 if I'm
remembering right. That one's totally dead, it just worked one day and
then it wasn't working any more, not even a power light. It was suggested
to me probably HOT, but I don't know what else might be gone in there. I
got it used, and don't have a clue as to what sort of shape it's in.
 
You can probably fix the two NEC ones without any kind of service
information, just a good ESR meter.

The Samsung will need some standard monitor/tv type of troublshooting out
the gate and from that you could see if it is worth fixing from a technican
standpoint.

David

Roy J. Tellason <rtellason@DONTSPAM MEpa.net> wrote in message
news:uMmkb.477$In4.414594@monger.newsread.com...
William R. Walsh wrote:

Hi!

NEC Multisync 3D (JC-1404HMA)
NEC Multisync 2A (JC-1403HMA)

Probably worth the fix unless something big has melted down
inside...which
I doubt. I have lots of NEC monitors that I have been given and while
some
have been broken, the repairs made have held up nicely. I bought a
MultiSync 95 new a few years ago because I was so pleased with the used
ones I was given.

No, the 3D was in constant use here until I couldn't deal with the
vertical
foldover (at the top) any more. You could adjust the size downwards and
it'd go away, leaving you with less than a full raster that was still
viewable. The monitor was attached to a BBS machine (717-838-8539 if
anybody's interested). The other problem with it was that it was not
going
all the way to a solid black level, the backgrouns was too high. This
combination of symptoms leads me to suspect that there's a power supply
common to the vertical output stage and the CRT biasing, though I still
haven't gone into it yet, and don't remember ever getting into one of
these.

The other one, the 2A, simply displays but with insufficient width, and
some slight distortion in the raster. I've only ever turned it on once
since it was given to me a couple of years ago. I'm thinking low-voltage
power supply, or something screwy in the horizontal output circuit. One
of the reasons I'm interested in checking caps lately. :)

Samsung Syncmaster 4 Plus (CCB-7571)

Total junk...probably one of Samsung's worst. They seem to keep running,
but I have a lot with bad focus, pictures that take forever to come up,
or
with some colors too pronounced while others are fine. I also have a
hard
time looking at them without getting a bad headache, and I know it isn't
the source of video that is the problem.

I'm real sorry to hear that, as that's the biggest one out of the bunch
and
also promised the highest resolution out of any of them, 1280x1024 if I'm
remembering right. That one's totally dead, it just worked one day and
then it wasn't working any more, not even a power light. It was
suggested
to me probably HOT, but I don't know what else might be gone in there. I
got it used, and don't have a clue as to what sort of shape it's in.
Click to expand...
 
"David" <dkuhajda@locl.net.spam> wrote in message
news:3f922574@news.greennet.net...
You can probably fix the two NEC ones without any kind of service
information, just a good ESR meter.
Click to expand...
For the one with the foldover you shouldn't even need an ESR meter, they're
useful but they're not magic. You still have to know somewhat what to look
for, in this case check electrolytic capacitors near the vertical output IC.
 
I would start by checking the ESR of electrolytic caps in the relavent circuit
areas.

Also note that a 2A will never get you a full width raster at normal refrest
rates.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
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Important: The email address in this message header may no longer work. To
contact me, please use the Feedback Form at repairfaq.org. Thanks.


"Roy J. Tellason" <rtellason@DONTSPAM MEpa.net> writes:

William R. Walsh wrote:

Hi!

NEC Multisync 3D (JC-1404HMA)
NEC Multisync 2A (JC-1403HMA)

Probably worth the fix unless something big has melted down inside...which
I doubt. I have lots of NEC monitors that I have been given and while some
have been broken, the repairs made have held up nicely. I bought a
MultiSync 95 new a few years ago because I was so pleased with the used
ones I was given.

No, the 3D was in constant use here until I couldn't deal with the vertical
foldover (at the top) any more. You could adjust the size downwards and
it'd go away, leaving you with less than a full raster that was still
viewable. The monitor was attached to a BBS machine (717-838-8539 if
anybody's interested). The other problem with it was that it was not going
all the way to a solid black level, the backgrouns was too high. This
combination of symptoms leads me to suspect that there's a power supply
common to the vertical output stage and the CRT biasing, though I still
haven't gone into it yet, and don't remember ever getting into one of
these.

The other one, the 2A, simply displays but with insufficient width, and
some slight distortion in the raster. I've only ever turned it on once
since it was given to me a couple of years ago. I'm thinking low-voltage
power supply, or something screwy in the horizontal output circuit. One
of the reasons I'm interested in checking caps lately. :)

Samsung Syncmaster 4 Plus (CCB-7571)

Total junk...probably one of Samsung's worst. They seem to keep running,
but I have a lot with bad focus, pictures that take forever to come up, or
with some colors too pronounced while others are fine. I also have a hard
time looking at them without getting a bad headache, and I know it isn't
the source of video that is the problem.

I'm real sorry to hear that, as that's the biggest one out of the bunch and
also promised the highest resolution out of any of them, 1280x1024 if I'm
remembering right. That one's totally dead, it just worked one day and
then it wasn't working any more, not even a power light. It was suggested
to me probably HOT, but I don't know what else might be gone in there. I
got it used, and don't have a clue as to what sort of shape it's in.
Click to expand...
 
David wrote:

You can probably fix the two NEC ones without any kind of service
information, just a good ESR meter.

The Samsung will need some standard monitor/tv type of troublshooting out
the gate and from that you could see if it is worth fixing from a
technican standpoint.

David
Click to expand...
<...>

Samsung Syncmaster 4 Plus (CCB-7571)

Total junk...probably one of Samsung's worst. They seem to keep
running, but I have a lot with bad focus, pictures that take forever to
come up, or with some colors too pronounced while others are fine. I
also have a hard time looking at them without getting a bad headache,
and I know it isn't the source of video that is the problem.

I'm real sorry to hear that, as that's the biggest one out of the bunch
and also promised the highest resolution out of any of them, 1280x1024
if I'm remembering right. That one's totally dead, it just worked one
day and then it wasn't working any more, not even a power light. It
was suggested to me probably HOT, but I don't know what else might be
gone in there. I got it used, and don't have a clue as to what sort of
shape it's in.
Click to expand...
I just don't want to go to the trouble of going in there and replacing the
HOT and then finding it blowing again, or finding that it's got other
stuff that's going to make it a major time-sink... I have too darn much to
do and too little time to do it all in anyway! :)
 
the nec's are probably just some dried out caps in the rbg and vertical
sections.
make sure the focus doesnt drift since that is how most nec flys fail.
the samsung has a 99.99% chance of a dead tube.
"William R. Walsh" <newsgroups1@idontwantjunqueemail.walshcomptech.com>
wrote in message news:eek:wlkb.814635$Ho3.222466@sccrnsc03...
Hi!

NEC Multisync 3D (JC-1404HMA)
NEC Multisync 2A (JC-1403HMA)

Probably worth the fix unless something big has melted down inside...which
I
doubt. I have lots of NEC monitors that I have been given and while some
have been broken, the repairs made have held up nicely. I bought a
MultiSync
95 new a few years ago because I was so pleased with the used ones I was
given.

Samsung Syncmaster 4 Plus (CCB-7571)

Total junk...probably one of Samsung's worst. They seem to keep running,
but
I have a lot with bad focus, pictures that take forever to come up, or
with
some colors too pronounced while others are fine. I also have a hard time
looking at them without getting a bad headache, and I know it isn't the
source of video that is the problem.

William
Click to expand...
 
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