On Wed, Feb 22, 2012 at 02:30:04AM -0500,
Mouse wrote:
Of course, the only way to get good at it is to
practice. But it's not clear to me that ama@
wants to get good at it (as weird as that may
seem to me, especially for someone in this
hobby).
I'd love to get good at it, but the point is that
currently I'm not. I envy guys like you or
The only way to learn is to 'have a go'. Yes, you need to learn some
electronics from books, but in the end you have to start tryign to figure
things out for yourself, on the actual hardware. I don;t want ot put you
off, but I've been repariing classic comptuers for nearly 30 years now
(started doing it seriously in 1986), and I am certainly still learning.
In fact I don;t thinkyou ever stop learning on soemthing like this.
I am not convioncd a mnoitor, particularly one with what sounds to me
like a power uspply fault, is the easiest thing to learn on, but then
again I wou;dn't pick the PDP11./45 as the fisrt minicomputer to get
going, but it's the one I learnt CPU repair on. Sometimes you are forced
to work on thigns that wouldn't bee the first choice :-)
There may well eb a service manual availabe for this monitor, Sony were
pretty good about producing them. I ahve no idea where you'd get it from,
and it'll be written for service technicians, it won't be a 'handholding
manual'. Most likely it'll be the schematics, PCB layouts, parts lists
and n ot a lot more. Votlags nd waveforms may be given on the schematcs/
now is to find out is if it's worth to keep those
two great monitors and try to fix them or if I
should just lose any hope and throw them away. :)
That's the reason why I was (am) asking is if
anybody might know what might have happened to
them and how to check it out and, if possible, to
I could say something like :
" I am guessing there's no sign of life at all when you turn them on (no
power light, the CRT heaters don't glow, etc). In which case this sounds
like a power supply problem. I am going to guess it's a switch-mode PSU.
Check the mains fuse and see if it's blackened (indicating a catastrophic
failure of the PSU) If not, elimineate the 'silly fault' by making sure
the on-off switch cloeses correctly. then suspect the startup resistor, a
high vlaue reisstor from the positive side of the mains smoothing
capacitor to the chopper drive circuitry."
The problem is that while that's what I would do, I doubt you'd be able
to find thos componetns without more information and woulnd't know how to
trest them, or repalce them.
-tony