I have a broken Sony Cdi IV0-V11. I picked this up broken and upon taking apart it looks likesome modded or bypassed some traces. I can't find almost anything about them, much less mods or repairs. Right not, it won't turn on or do anything. Any suggestions? Here are some pictures of the system and the boards inside. backside of above board Soldered parts on board
The soldering and insulation tape looks like it probably came from the factory like that. It might not be a modification at all. If you can verify the PSU is working, then I would suspect the SMD capacitors. If they're anything like the ones in their mini radio's, they've probably all deteriorated with age.
:flamethrower:IC507 looks a bit barbequed. Compare it to IC508 next to it, which is the same chip. It looks like the heat from the blast has liquefied the surrounding flux and blown it across the board. At least you can get the replacement part number from IC508. Also, as Oldgamingfart suggested, the surface mount capacitors may well be leaky. I've repaired a few Sony camcorders from the '90s and it's always the bloody caps. Quick test: if you have a soldering iron, go around a few of the caps just quickly touching the leg enough to melt the solder. If you get rewarded with a whiff of rancid kippers, then the cap has leaked.
Oh yeah, didn't spot that (eyesight isn't what it used to be!) I thought it was probably soldering flux or glue of some kind, but indeed compared to the identical chip next door to it, definitely looks like a bit of it has blown away. To be honest, if a replacement chip doesn't sort it then it might not be worth bothering with (apart from keeping it for spares for another working unit). Soldering SMD components is also a pain in the backside, and without the correct tools it's really quite easy to mess up.
What do you recomend for surface mount stuff? At the moment for everything I'm using a cheap 30w iron and try to avoid Surface mount components if I can after a bad experience with an inverter board because of a mosfet.
I'm not 100% certain this is the part: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=NJM2100D#-ND But judging by the datasheet it is the DIP version. The part number for the SOP version (or is that SOIC? Meh) is NJM2100M which I can't seem to find anywhere. Mouser has the M model listed as "non-stock": http://www.mouser.com/ProductDetail/NJR/NJM2100M/?qs=sGAEpiMZZMtCHixnSjNA6NG6IBDWSupw7WKLMzcmRbg= Keep in mind I'm not 100% certain that is the correct part but its got the same manufacturer (JRC) and the first 4 digits match. If it is according to the datasheet the blue wire is soldered to a power input pin and judging by the soldermask on the PCB the black wire is going to GND.
I guess the correct method would be to use solder paste, and a hot air gun. With the capacitors you can usually get by with a fine tip point and solder paste. In some cases a fine tip and very thin solder wire will suffice (depends on the type of component really).
Also, if you're going to order a replacement IC, it might be worth getting a couple extra. It is possible that there's a fault elsewhere that caused IC507 to blow, and you may end up with the same result once you fit the replacement. The SCPH-5001 PS1 has a similar IC, here's a boardscan, look at IC708 near the bottom-right corner: 2100 773? JRC. I'm not sure about the significance of the second group of digits.
You can do it all with an iron really - I solder 0603 parts easy enough - however hot air over them once placed makes everything straighten out and look tidy Paste works well for doing the whole side of a PCB in 1 go tho, but you need a stencil.
