IBM deskstar DTLA-305040 burnt motor controller

[TerraNova]

hi gurus!

i have IBM deskstar DTLA-305040 with burnt motor controller, i replaced it and still not powering up, maybe other components? please help me ....

The 90G2018 motor controller shown on photo has been replaced.

Thanks

Attachments

[rameez]

What did u replace it with Hot gun or with soldering iron if u used just hot gun then resold it with soldering iron sometimes pins dont usually touch the points .

[TerraNova]

soldering iron, yes rameez i have checked the connections are ok and properly connected.

[rameez]

if u can find another board of the same family DTLA transfer the orignal NVRAM to that pcb ur drive will work fine after that .

[TerraNova]

thanks rameez i will try it out.

[TerraNova]

Rameez i swap ROM it doesnt work, the faulty pcb has 25FV101T chip and S93C6 ROM, the replacement PCB i have has no 25FV101T chip.

I have tried measuring Q1, Q2, Q3, U9 all ok, could it be the Read Channel chip? D1 and D2 at the back of the pcb are also ok.

[rameez]

u will have to find the same pcb that has both ROM and NVRAM present like in your pcb if u have trouble finding the pcb give me info i will look in my stock .

[TerraNova]

Rameez, it doesnt work i tried swapping ROM and NVRAM, IBM deskstar as far as i know not easy to swap ROM and NVRAM unless same version. Anyone have any clues? Thank's

[rameez]

On which pcb did u solder the orignal nvram of the drive , what did the drive do after u swap pcb and nvram ?

[Amarbir[CDR-Labs]]

Hi,
in your photo i also see a mosfet/regulator with a hole ?

[TerraNova]

Rameez, the drive clicks after i swapped NVRAM and ROM to donor identical pcb.

Amarbir the hole is the manufacturing hole, its is tested working. I still could not figure out why the drive will not power up, i have identical pcb board, i swapped the NVRAM and ROM and still would not work. ummmm headache....

Heeeeeeeeeeellllllllllpppppppppp!

[dobrevjetser]

Hi Terranova,

Did you check if the nvram is still readable ? (use eprom-programmer)
Because, if the nvram is defective or corrupt, the drive will not start either!

Best regards,

Dobre

[TerraNova]

dobrevjetser , thanks...i swapped the nvram and rom to donor identical pcb and the drive starts but clicking...so i think it must be working....not sure...i dont have eprom programmer to check individual chips...

[pepe]

Hi,

Most probably U are facing a burnt preamp....

pepe

[TerraNova]

hi Pepe, thanks i will give it a try changing hda.

[TerraNova]

Today before i do head exchange the drive starts up but the motor controller chip gets really hot, i mean untouchable.

[prodata]

try to use SA Switch.. Sometime it because of its motor controller IC too HOT..

[TerraNova]

prodata tried that doesnt work thanks

[TerraNova]

Tried replacing 90G2018 today same results.
Is read channel exchangeable? I suspect the read channel chip is blown cause all major parts warm except the read channel chip dead cold.

[pepe]

Hi,

just replace the MHA, put the prepared donor PCB on the drive afterwards, it should work...

pepe