TTXUSB CPU chip repair?

[imallama]

Just wondering if anybody has had any experience with this before? Bought a set of TTXUSB's, and then find out that one of the turntable platters spins extremely fast. Looked up the issue online, and it seems to be a CPU chip problem. I have a friend whose going to help me de-solder the old chip and re-solder the new one in, but I just wanted to ask around and see if anybody had experience with this type of repair before? I can't return it since I bought them used off of craigslist and so the warranty is way past expired.

From what I've researched, the chip is a Toshiba TA7259P but it might not be the same since the TTXUSB have variable torque. The turntable that's busted is a first generation TTXUSB, so I'm not sure if the chip is the same or if it's different. Help?

P.S. Please refrain from saying things like "well, this is why technics are the best/you should've gotten tech's/TTX ARE T3H SUX0RZ!11!" as that doesn't help anything.

[Hausgeist]

These are the parts for variable torque TTXs.

http://www.instrumentalparts.com/nuttxusbttsp.html

[DTR]

Get yourself a proper IC insertion tool, otherwise getting the IC in without bending the pins can be a pig.

[imallama]

Get yourself a proper IC insertion tool, otherwise getting the IC in without bending the pins can be a pig.

IC insertion tool? I've never even heard of that lol. Have you done a repair like this before? I was planning to call instrumentalparts and talk to somebody there to problem shoot it. I just want to make sure it's the IC chip. It just sucks that the chip is different than the Toshiba one, since it's much larger and costs $70.

[DTR]

Have you done a repair like this before?

Not on a TTX, but ICs are a pig no matter what they're plugged into.

[imallama]

Not on a TTX, but ICs are a pig no matter what they're plugged into.

That's what I've heard haha. Talked to my friend, he thinks that it might be a bad capacitor and not so much the IC. I don't really know, lol, but he said to replace the IC we'd need a solder reflow oven...which we don't have. So I'm hoping that the IC doesn't need to get replaced. Or else I totally got screwed over.

[Windows 95]

but he said to replace the IC we'd need a solder reflow ovenI.C.s usually aren't soldered to anything, they are usually plugged into a socket.

http://i46.photobucket.com/albums/f110/CheapCharley/Oresto/socket2.jpg

[djpenguin]

I.C.s usually aren't soldered to anything, they are usually plugged into a socket.


This hasn't been true for a long time. Through-hole components have been on the way out in favor of SMD for the past twenty years.

[Windows 95]

This hasn't been true for a long time. Through-hole components have been on the way out in favor of SMD for the past twenty years.My bad, I did not know that. My electronics classes were 32 years ago & I don't work in electronics, so I hadn't noticed.

[djscrizzle]

The only thru-hole components you'll find anymore are in the Power Supply sections of gear or high power applications, like the output stages of power amps and the like... The rest of the PCBs found in equipment are just about using all SMD devices nowadays, soldered with RoHS solder.

You'd need a re-flow oven or an SMD re-work station to fix SMD boards. Dont forget anti-static mats and a wrist strap, with almost all ICs being CMOS in one way or another now, and the ones that aren't are built so small that the ambient level of static electricity we carry on us can blow em up.

Lead-free solder is almost always a pig to work with when you aren't using SMD Re-work or a re-flow oven. Gimme 60/40 solder n thru-hole parts (n some perf-board too) any day!

[imallama]

The only thru-hole components you'll find anymore are in the Power Supply sections of gear or high power applications, like the output stages of power amps and the like... The rest of the PCBs found in equipment are just about using all SMD devices nowadays, soldered with RoHS solder.

You'd need a re-flow oven or an SMD re-work station to fix SMD boards. Dont forget anti-static mats and a wrist strap, with almost all ICs being CMOS in one way or another now, and the ones that aren't are built so small that the ambient level of static electricity we carry on us can blow em up.

Lead-free solder is almost always a pig to work with when you aren't using SMD Re-work or a re-flow oven. Gimme 60/40 solder n thru-hole parts (n some perf-board too) any day!

Ah I see. Cool cool, thanks for the info guys. I'm going to call up Instrumentalparts tomorrow and see what they say as well.

[imallama]

So I still couldn't get through to instrumentalparts, and the 2 numark certified repair centers both gave me different information. One said that the table was screwed and for parts, the other one said that it's probably the motherboard but doesn't know where to begin since he'd have to trace the wires and compare it to the schematics...which aren't available to the general public. SMH -___-