Hey guys, I have a Goldstar 3DO that I got off eBay recently (was listed in for parts/repair condition) with a CDROM board issue. It looks like the BA6295AFP chip is burnt out. I'm wondering if I can simply replace it with a new BA6295AFP. Here are some pics: Chip up close: Backside:
Yeah, I'm not sure. I just desoldered the chip. Tried to clean it up as best I could but it's not a pretty sight Is this salvageable? Note the missing pad(s)..
It could be salvageable. Can you find where those missing pads lead to? If so, when installing a replacement chip, you could try soldering to the undamaged parts of the traces leading from the missing pads. If you can get a schematic for the board, it should help locate where the traces go.
it could be. It looks like that one pad that is missing wasn't going anywhere possibly. the big part missing looks to be ground plane. those vias would have to be repaired too, but they look like they might have all be going to ground also.
Thanks for pointing that out! Really helpful. Update: Ordered a usb loader from mnemo to install in this console. I've been wanting one for a while anyway. Thanks to those who tried to help.
I can tell you how the ROHM chip fried: The motors are brush based and they probably did wear out. Then they shorted down. Same problem which happen with the Dreamcast.
You seemed to be suggesting that the damage was there already, but you've in fact made it worse yourself. Lesson learned, hopefully - in future, don't assume that brown lacquer necessarily means the chip is dead - do some diagnostics on it first, where possible. And use the correct tools to desolder surface mount devices. To answer your question, that board is now screwed. I've merged your posts - please use the edit button where there hasn't been a reply within the past week. Thanks!
All brown solder mask means is that the part heated a lot. But unfortunately, a part which heated a lot has a very big chance of being damaged.
What makes you come that conclusion? The burnt part appears to be just a ground plane, this is a two sided PCB.. Going by the datasheet only pins, 23 and maybe 7 will need repairing. 23 is Vref and seems to be connected to the large plane below it going under the IC 7 is just VCC (7.5v) this is far from screwed.. data sheet http://www.classiccmp.org/rtellason/chipdata/ba6295.pdf Replace the motors then the driver Interesting....
it was screwed from the start with Goldstar now LG. IT can be fixed but pointless given how cheap they are. if your in the market to keep a 3do get a FZ10
That drive is SANYO. It's the drive from the SANYO IMP-21 3DO unit. Edit: Which LG also used on their unit(as OEM).
Yes it's two sided, and those through holes look less than great. OK, it's an uneconomical repair - better? The time and effort you'd spend on it, you'd be better off replacing the board (or the whole machine perhaps, given how cheap they can be). Plus any repair is going to be a bit of a bodge job.
