On Mon, 01 May 2006 09:43:08 -0600, Hamad bin Turki Salami
put finger to keyboard and
composed:

I have a defective music device. It's a MOTU MIDI Timepiece AV USB midi
interface. The problem is that the USB is not working. I'm hoping to
fix the unit myself, because sending it to MOTU for repair would cost
a good chunk of the value of the unit.

A few of the IC's on the main board are seated in sockets, so I decided
to try a simple swapping method to see if any of the IC's could be the
problem. I got a working unit of the same kind and swapped IC's until I
found a particular IC that seems to be the source of the problem.
(Whichever unit has this IC fails, regardless of what other IC's are in
it.)

MOTU doesn't sell replacement parts, so if I want to replace this IC
I need to get it from a third party supplier. Now, I don't know a thing
about IC's, so I'm lost here. The IC is marked:

CG5273DM 64013PC
IND9940
516070

Is this IC a mask ROMmed uP? If so, then I'd be careful of second
sources. You would need to ensure that the replacement IC was
programmed with exactly the same firmware.

- Franc Zabkar
--
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