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morphix
Joined: 10 Mar 2012
Posts: 4
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 Posted: Sat Mar 10, 2012 2:15 pm Post subject: JVC DR-MH30SEK PSU Fault - Help Needed |
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Hi all,
I have one of these brilliant HDD DVD recorders and it's been a joy to own, until I accidentally blew it up!
I'm hoping someone can offer some advice on how to go about repairing it. I have some experience working with electronics as a technician and hobbyist but I'm no engineer! I have nothing to lose though so willing to give it a try..
First the problem:
It happened when I accidentally shorted the SCART connector on the back..there was a big spark and a popping sound and the machine lost power. I opened it up and noticed a glass 2A quick blow fuse had gone on the PSU so replaced it and powered up..it blew instantly again. So did 2 more.
On examining the PSU board closer I noticed a big scorch mark near a diode (D5106) so I'm guessing that is burnt out and needs replacing..that might explain why the circuit is shorting out the fuse..? I do not want to remove the PSU board if I can help it which appears to be clipped down by those annoying white expanding plastic plug things... so my plan is to solder a new diode across the top of the old one, or just clip out and leave the legs in and solder the new one onto the legs.
I looked up the diode in question on the board which appears to be a
ERA 18-02 fast recovery diode 200/400V / 0.8A.
Does my repair approach sound feasible? Maybe it's a more serious problem? |
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Justmanuals
Joined: 21 Aug 2004
Posts: 1948
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jts1957
Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
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| Posted: Sat Mar 10, 2012 7:49 pm Post subject: |
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Top two/Bottom three: All FREE
http://elektrotanya.com/?q=showresult&what=jvc%20DR-MH30&kategoria=&kat2=all
Generally, "squishing" post with needle nose pliers while gently lifting board near that same point works for me.
Obtain a DVM. Test part(s) around the area surrounding where you find a defective part.
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morphix
Joined: 10 Mar 2012
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morphix
Joined: 10 Mar 2012
Posts: 4
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| Posted: Thu Mar 15, 2012 12:23 pm Post subject: |
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Thanks I will try what you suggested. And thanks for the free link..I managed to get the schematic. |
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jts1957
Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
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| Posted: Thu Mar 15, 2012 1:37 pm Post subject: |
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[url]http://www.newark.com/jsp/displayProduct.jsp?sku=06M7457&CMP=KNC-G-SKU-NTE&s_kwcid=TC|14641|nte552||S|b|9524661141[/url]
NTE 552
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