Re: Monitor Problems

[Rubywand <rubywand@swbell.net>]

Supertimer writes ...
> 
> Paul Grammens <pgrammen@sonic.net> wrote:
> 
> >Charles J. Sarchet wrote:
> >>
> >> If anyone knows how to diagnose and repair the GS RGB Monitor, I would
> >> greatly appreciate some help.  I have one that beyond my limited knowledge
> >> to fix.
> >
> >I'm an electronic tech, and I've worked on lots of monitors, though not
> >a IIgs RGB. Post some detail on the nature of the problem, and maybe I
> >can point you in the right direction. Worst case, they sell for $5 or
> >$10 around here, once people realize they don't work with a Mac.
> >
> >The problems usually relate to horizontal, vertical, red, green, blue,
> >focus, intensity, stuff like that. So what are the symptoms?
> 
> I've got one for you, Paul.  My IIGS RGB monitor now only displays
> a horizontal line across the center of the screen.  I've flipped through
> PC Tech books and discovered that this is a common problem and
> that "the vertical deflection is faulty" or something like that.  What
> does that mean and is it expensive to fix?

     This _may_ be fairly easy to fix.

     The IIgs monitor's HV module (the black thing with the anode lead going to
the picture tube) is mounted to the motherboard in holes which are too large
for the pins. As a result, many units develop solder fractures around the pins
which lead to all sorts of problems for users including the one you describe.

     The fix for the above is to resolder all of the pins from the HV module
using good quality solder. (Of course, you need to take a number of safety
precautions-- unplug monitor and let it sit several hours, wear goggles, work
on a non-conductive table, discharge the HV anode, etc. as described in more
detail in the FAQs Csa2Monitor.txt file.)  



Rubywand