Hi everybody. I need some help to solve this problem.

Maxtor 51024H2 - not spinning

changed card with one identical but different FW - motor spin ok, drive of course clacks, so motor is working

Substituted Motor IC and chips RDS035L03, 78L08 gives the 8V correctly.

No spin - on the motor connector there are 12v.

Any idea ?

Thanks in advance

CYM

Hi,

You can check if the main controller (DSP) works by oscilloscope. You give it 3.3V to the FET's output pin, then try to pull up the RESET line to 3.3V(if it is pulled down by some circuit), or U pull it down then release it, if it was already on 3.3V. Then U check the address/data lines by the oscilloscope (immediately after reset pulled up). If they are busy, U can replace the motor controller IC (PTLS2271 I guess). Warning! if You give the panel supply with this IC unsoldered, the output FETs will possibly blow!
THere are marked checkpoints as 3.3V, POR(power on reset).
U can measure the address lines at the flash chip (28F102BB).
One more thing: I usually ask the customer what components were damaged along with the drive. If he says only the HDD, the above probably will work, because there was only the 12V supply that was too high. If he says motherboard, video card..., there is a possibility that the preamplifyer inside the HDD is burnt (5V was also high). in this case U hear clicking with the good panel regardless of the firmware version. Check the head connector by a multimeter (diode checking) to the working drive's identical pins!

pepe

pepe

if it has flash rom try to chage it to working pcb if procesors are the same this might work.
Did You put motor driver good?
Nikola

Thanks folks for the ideas. I will try.

Thanks again for your help