Apple Monitors
Mike Browne
matter, how about Sun Microsystems as well?
Thanks
Mike
Jon Yaeger
****
Mike:
We used to fix Apple monitors and have a lot of parts left, including
boards, FBTs, transistors, etc. Schematics are another matter . . .but we
do have a good database of repair tips.
Looking for anything in particular? If so, contact jo...@mindspring.com.
Hillbrathd
Larry Rothman
the problem
I'm having with several of the older Apple 21" displays where I work.
These are
the older displays that did an automatic degauss as you moved the screen
around.
Specifically, the display power starts up OK then shuts down after about
1 second.
I don't know if the high voltage circuit has a problem or if it's in the
power
supply board. These monitors were designed for low rf and EMI field
emissions for
use in Europe. I'm wondering if the control circuits are doing this.
Strange thing is, all of the monitors (4) are doing exactly the same
thing. One
by one they failed. It's got to be a generic problem. This is the Apple
M5812PA/A
monitor. I haven't been able to find out who manufactures this for
Apple.
Any help would be greatly appreaciated.
Regards,
Larry
Jon Yaeger wrote:
>
> In article <3687D851...@ucla.edu>, Mike Browne <mbr...@ucla.edu> wrote:
>
> > Anyone have a source for Apple monitor parts and schematics? For that
> > matter, how about Sun Microsystems as well?
> >
> > Thanks
> >
> > Mike
>
Steve Bell
Larry Rothman wrote in message <369A34...@tor.comm.mot.com>...
>Sorry to butt in here but I was wondering if anyone ever came across
>the problem
>I'm having with several of the older Apple 21" displays where I work.
>These are
>the older displays that did an automatic degauss as you moved the screen
>around.
>
>Specifically, the display power starts up OK then shuts down after about
>1 second.
>I don't know if the high voltage circuit has a problem or if it's in the
>power
>supply board. These monitors were designed for low rf and EMI field
>emissions for
>use in Europe. I'm wondering if the control circuits are doing this.
>
>Strange thing is, all of the monitors (4) are doing exactly the same
>thing. One
>by one they failed. It's got to be a generic problem. This is the Apple
>M5812PA/A
>monitor. I haven't been able to find out who manufactures this for
>Apple.
>
>Any help would be greatly appreaciated.
>
>Regards,
>Larry
>
The only older Apple 21" colour monitors we see in the UK are the M3502.
I've never come across an M5812PA/A before. When you say low RF and EMI, do
you mean its had Tempest mods done for military use. At various times I've
seen monitors modified with extra metal shields, copper tape and gauze,
extra filters and a special screen fitted over the front of the CRT. These
units originated from a field service operation that had a MOD contract in
the UK.
If your monitor is like the Philips built M3502, I can email you a copy of
the deflection board schematic, this is where most problems originate around
a few capacitors. The M3502 has a complex degauss circuit board, and the FBT
is mounted on a small PCB that unplugs from the main deflection board.
Steve Bell