May 6th, 2024, 6:42
IBM 90G1325
Mitsubishi M37952M4B-2202RP -DF
929A110 vs 917A118 (on 3rd line).
IBM36 JAPAN
AMSRC04 03
TQA7BB. 6C
20L7994 PQ
(1C25157TQR vs 1 C14090TQR)
May 6th, 2024, 13:44
May 6th, 2024, 14:42
May 10th, 2024, 9:50
I did a continuity check of all three F1, F2 and F3 fuses. My multimeter beeps for for each fuse: continuity is OK for all three fuses, on both PCBs.Did you check the fuses? F1 and F2 are near the top right corner of the IDE header while F3 is above and to the left of the motor controller.
I am not sure about the procedure for phase-to-common and phase-to-phase testing, but I measured the resistances at the motor connector pins (those who connect to the PCB). They are either 2.65Ω (+/- 0.05Ω) or the double 5.3V (+/- 0.1Ω).Did you measure the resistances of the motor windings (phase-to-common and phase-to-phase)?
I did one additional check inserting the drive directly in a working Acer Aspire 1200 series (almost as antique, from the Windows XP era): the HDD doesn't spin after powering the laptop on. I could check by not closing the HDD niche and check with my finger that there was no vibration.If the drive is waiting for a spin-up signal or command, it should still identify itself via an ATA Identify Device command, I would think.
I had wrongly measured VDC instead of VAC.When each PCB is detached from the HDD and powered on, I measure no voltage at each of the 4 motor-pins, below the square-shaped hole.
May 10th, 2024, 16:32
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