Good day gurus,

When powered on, this drive does not get to ready state and the heads do not initialize. So I purchased a donor and it worked good. When I attempted to hot swap, the patient drive started doing the same thing after working, getting to ready state and heads initializing. Is there a history of Quantum's doing this or does someone have good experience with this drive with respect to PCB or ROM problems.

Thanks

Yes but I have to see the drive. Luckily these drives have a very low density (BTW is a 50Mb , 240Mb or.... which model ? Oldest drive with DisCache or newer one which model ?
Anyway if suspected damaged preamp or motor or VC, hot swap idea is never good, you can fry the new PCB (and then blame internet and all the genius that thought it worked for me so it's a universal cure). You have to check before attempting, and you have to know the hw structure of the PCB. Sorry I CAN'T POST SCHEMATICS OR ANY TECH DATA so don't ask for it.

Its a 340mb.
I will take a look at the PCB structure for the differences, Thanks Black ST

So I need to match the hardware exactly before attempted hot swap?

Yes. But don't forget the modules are on the platters, or you could still have head problem - unlike. In stock I still have a 50 and a 240 mb but not other...

BlackST- thanks for your help. I have a question about what you mean by HW. Is that hardware, the configuration of the electronic board? Also, do you know which chip controls the spindle motor? I did a PCB swap before I posted this question. If it is the chip, do I need to find a working chip then replace it?
Thanks again.

I have a 240AT at hand, the motor controller chip seems the HA13476, same for the LPS50. Can you post a pic of the controller board ? In any case, some part of the drive firm/software is stored on the platters (take it into account).

I couldn't get a closer picture of chips sorry.

You should have two HA13476 or similar ICs. (like RAM but with central tab for heatsinking) . Check them. Latter boards like the Fireball 1700AS have similar config. but a combo chip for VCM and motor drive.
A quick check should be easy - a short driver IC will become usually very hot at startup. Also, check for evident package cracks on the ICs.
BTW do the led show sign of life ? Have you checked the path from the +5 / +12 power to the rest of the board, quartz osc. and activity of the MCU (the syscon) ?

I cannot see visible damage to either IC and neither IC gets hot before the drive powers down. When powered up, the drive (actually both of them patient and donor)are "chirping" about 4 times then powering down. Is that a fw issue?

Can you record and post? Also, did motor spin?

Hello,

I guess you have preamp problem, but now 2 damaged pcb as well...
I suggest to try to find another donor, and try to measure the preamp's connector, and try to find a difference.

Regards,
Janos

If I'm not wrong there is no preamp inside, it's the At&t chip. To be confirmed - drive is old!

Motor spins. Heads are parked near the center of the drive. When powered up, heads attempt to initialize and drive powers down after four attempts.
What can I do to work with the fw?

Pc3000

Problem solved. check PM, Blacky!
pepe

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