Re: Sony Multiscan 17SF2 (CPD-17SF2)

Hi,

> First of all, replying three times to your own post will not exactly win the
> group over!
I know and I apologize for this. It is just I found several new things after my first post... I would have to think and search first before writing. Sorry again... I do not like "spammers" too.

Thanks a lot for all these clues and accurate information, especially for the security warning... I knew that these kind of capacitors are dangerous but I did not know it could directly kill me.

And thanks again for replying (knowing I have nearly no chance to make it work !). I am going to print your message... I hope I will understand it all !

Alex.


Dave D a écrit :
First of all, replying three times to your own post will not exactly win the group over!

The SF2 is a good monitor, reliable and with excellent image quality. I run 20" SF2s and they have given me good service, and I have repaired a few in the past. My main monitor is thr 300SF which is almost identical but has dual inputs. The 'beep' you are hearing is most likely the squeal of the the power supply trying to start but failing, so there may be an overcurrent problem, check for shorts like a shorted horizontal output transistor.

Main faults I've found-

Video cable fails where it enters the plug. Forget about soldering a new plug on unless you have the patience of a saint. Cable replacement is so much easier, I cannibalise old monitors and use a bit of trickery to splice it insode the monitor. It's not pretty but it works and the new cable will probably be more flexible than the very stiff Sony cable which is the reason the latter tends to break. As yours shows no LEDs then this isn't the problem.

Horizontal output transisor and an associated mosfet fail (I forget the exact P/N).

Open circuit picofuses which sometimes fail for no apparent reason- they look like a TO92 transistor but have two legs.

Good luck. you'll need it! These are rather sophisticated units and not tremendously easy to work on.
You say you have limited electronics skill so I'd say your chance of getting it working is close to nil. Whatever you do, be very careful inside this monitor- the mains capacitor stores enough charge to stop your heart, and in a fault condition its charge may not drain off, even after days or weeks.

Dave


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