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[Monitor] Proview Electronics 770M help with repair.

 
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Realz^_^



Joined: 02 Oct 2005
Posts: 1
Location: Roma (italy)

PostPosted: Sun Oct 02, 2005 6:03 pm    Post subject: [Monitor] Proview Electronics 770M help with repair. Reply with quote

I've founded that monitor some days ago..
I've plugged to alimentation (220V 50Hz) and to computer. Monitor starts to do a sound like that: Click click click click, no stop, like a timer. I've readed faq of SCI.FI for see what kinda of fault can be.. and i checked somethings, and i've founded a diode and 2 transitor near outs of flyback trasformers.. i don't remember if that transistor are called orizional end of vertical ends, anyway, aer broken..

The two transisotr are called:

Q630 is a IRF644A
Q664 is a C4686A

It's a diode of 56 volt.

i've rode also that i mus check an electrolitc capacitor of 22UF /250v but is ok, and then also another capacitor onboard called C611 but also that are ok ins't interrupted.

I've seen a dark part on board.. but not very dark.. near the plug of alimentation.. a group of 2 diode and 2 resistor.. but they're all ok also if trought that going low current.

I'm not a specialized tecnic, i'm a beginner, and then.. i'm went ok with checking?? If i change broken part, it will go okey?
What other parts i must check importantly?

Thank you in advance
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ramjimh



Joined: 18 Jul 2004
Posts: 24
Location: mdurai

PostPosted: Thu Oct 06, 2005 1:09 pm    Post subject: proview monitor Reply with quote

q630 might be irf634a,it is a field effect transistor,check the supply diode for fbt,and horizontal outpou transistor,put the exact irf634a,don't replace to irf60.it will fail again.replace these components,your monitor might become ok.

with rgds,

ramjimh
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i am interested in repairing of computers and cell phones.
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