Please help a newbie repair a "hand clapper"
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From: Bjarne on 16 Sep 2007 09:11 >If you carefully touch each component with an insulated stick, >something like a chopstick, and each wire, you should be able to find >out the area of the circuit board that is most sensitive. I did that, and maybe it seemed like the most sensitive part was a Roland IC named BA662310A. But I could be wrong, since it was very easy to bring out the crackle everywhere on the pcb. I should hardly touch it with the chopstick. It wouldn't be the first time roland made bad chips though. Anyways, I probably have to buy another hand clapper. Thanks for the all the good advises. I will remember those next time something breaks.
From: Bjarne on 16 Sep 2007 09:13 and here is a pic of said chip: http://www.bgst.dk/pcb2.jpg
From: William Sommerwerck on 16 Sep 2007 11:48 "Bjarne" <no(a)no.no> wrote in message news:ts9qe3l3drafcgs9u967smiknkqd62jcc1(a)4ax.com... > > >If you carefully touch each component with an insulated stick, > >something like a chopstick, and each wire, you should be able to find > >out the area of the circuit board that is most sensitive. > > I did that, and maybe it seemed like the most sensitive part was a > Roland IC named BA662310A. But I could be wrong, since it was very > easy to bring out the crackle everywhere on the pcb. I should hardly > touch it with the chopstick. It wouldn't be the first time roland > made bad chips though. > > Anyways, I probably have to buy another hand clapper. Thanks for the > all the good advises. I will remember those next time something > breaks. As you will probably be buying a new unit, it can't hurt to experiment with the one you have. Just because solder joints "look good", that doesn't mean they are. And the solder joints on that board don't look very good. I would unsolder and resolder all the wires connected to the board.
From: Ron(UK) on 16 Sep 2007 13:34 Bjarne wrote: > and here is a pic of said chip: > http://www.bgst.dk/pcb2.jpg can you show us a pic of the other side of the board in that area? Ron(UK)
From: Bjarne on 16 Sep 2007 16:23
>can you show us a pic of the other side of the board in that area? That was almost impossible because the board was reflecting light and so my cam couldn't focus. Maybe I can take a better one in daylight tomorrow. Here's the best one http://www.bgst.dk/pcb3.jpg |