My question is whether to the purchase a donor pcb for HDD "WD5000AAKX" or "WD3200AAJS" with a hot air rework station can get the rom chip of the old board and solder to the donor plate, this would work? . I have read that this does not work because the microkernel is in the marvell chip, I already try and not work for me but I'm not sure the pcb donors are free from defects.

I have 4 HDD 2 WD5000AAKX and 2 WD3200AAJS. Acquired the internet the first WD3200AAJS he believed that was gonna be able to repair the pcb in the photos seemed to have only a diode tvs exploited, but replace the diode and it did not work then Try other things with hot air rework station and I think even more damaging the system board .

Acquired the WD5000AAKX damaged, to the replace the by a new to a customer. I found that the pcb has some capacitors in shorted I could not find the fault.

I recently bought 2 HDD over the internet a "WD3200AAJS" and another "WD3200AAJS" to use donor pcb or attempting to repair them, the seller had a bunch of these I told him to send me ones that are recognized by the bios but I could not check this the memory of my desktop PC became defective, I ensure that the pcb of these did not have any short capacitor.

I did change the rom chip, the donor pcb with hot air rework station I install the board in the HDD I got first try to connect to a sata converter -> USB and will not work

Hi man!
What a story you have there, which to be honest I did not understood all of it.

But with so many money spent on parts, don't you think that would be better to go to a professional to help you?

Could you show us what you are talking about?

_________________
A backup a day keeps DR away.

Defective HDD are not that expensive, one of 500gb not buy it. The idea it was at least repair one and sell it with that would cover investment and would win some money . Here there are not many professionals.

Sorry for my bad English i use a translator.



I can not find that causes shorted, is the patient's pcb. shorted: c65, c45, c52, c49 and one that is marked in red in the photo.


patient:
WD5000AAKX-221CA1
S/N:WMAYUW066125
WWN:50014EE15A01798C
DATE: 05 MAY 2012
DCM: HBNNHT2MGB
DCX: 60121W7C6
pcb: 2060-771640-003 rev a
no have pcb stiker :S
marvell 88i9045-TFJ2

donor:
WD5000AAKX-001CA0
S/N:WMAYUE918926
WWN:50014EE206B5C979
DATE: 29 FEB 2012
DCM: DANNHTJAEB
DCX:10021ETC8
pcb: 2060-771640-003 rev a
STIKER PCB:2061-771640-S03 AC XE BH391102 1 00053402345
marvell 88i9045-TFJ2

Try replacing rom chip U12 from patient to donor and did not work. I read this not think it's my case as the marvell chip is not 88i6745. Are they compatible?

Data from the 320gb hdd:

patient:
WD3200AAJS-22L7A0
S/N: WMAV2V898207
WWN:50014EE0023CC688
DATE: 09 MAY 2010
DCM: HARNHTJCH
DCX: 9000LV478
PCB: 2060-701590-001 REV B
STIKEC PCB: 2061 - 701590 - X02 AE XW 9W32 KST3 2 0005440
marvell 88i8846E-TFJ2

donor
WD3200AAJS-22L7A0
S/N: WMAV2FH83943
WWN: 50014EE0AD49D00A
DATE: 03 FEB 2011
DCM: HGRNNTJCG
DCX: 8004LFW73
PCB: 2060-771590-001 REV A
STIKEC PCB: 2061 - 771590 - X02 AD XW BS11 2S32 3 0001310 1311
marvell 88i8846E-TFJ2

Try the same change chip rom without success. This has a cliking.

In the case of the WD5000AAKX, you should be able to transfer U12 from patient to donor. If there is no other problem, and assuming the two boards are compatible, then that should be all you need to do.

If the board does not have a discrete flash memory at U12, then its contents will need to be reconstructed from backup modules in the System Area on the platters, assuming that these exist.

An additional complication may be damage to the preamp inside the HDA. Which of the following components were damaged?

http://www.users.on.net/~fzabkar/HDD/bi ... diodes.jpg

Is there a short circuit between the Vcc and Ground pins of U12?

What is the resistance between ground and each of the L1 and L2 inductors?

_________________
A backup a day keeps DR away.

Thanks for the reply fzabkar.

He had already made ​​the transfer u12 chip from patient to donor and did not work then it means that there is something more.

In the case of patient pcb 500 no damages TVS diode or resistance.

In the case of patient 320 pcb shorted diode d3 only.

I do not know the pinout of u12. Only 1 pin gives continuities with GND, in the 2 patients pcb.

Patient PCB WD5000AAKX, 2000 ohm scale
L1 in shorted ??
Red in gnd: 055
black in gnd: 035

L2:
Gnd net in 107
black in gnd: 649

Some fixes, are not how to edit the post as you do?

The patient pcb 500, not have the inductor L3 do not know if this will influence the measurements.

I remove this inductor and lost while trying to find the cause of short circuit removing some components randomly XD

Correction of the first publication of the topic:

If I understand you correctly, the patient WD5000AAKX PCB did not have any damaged TVS diodes (D3 and D4) or open circuited resistors (R67 and R67). However you did find that various capacitors were shorted, namely several bypass capacitors around the Marvell MCU plus C59 (near L1) and another capacitor near D1/L2.

If this is your board ...

http://cdn.shopify.com/s/files/1/0207/3 ... x1024.jpeg

... then there appear to be 3 power supplies below the SMOOTH chip.

L3 and D2 constitute the negative supply for the preamp. It appears that C59 connects to the anode of D2. This is the Vneg (my terminology) test point, probably -5V. With the PCB off the drive, can you confirm the resistance between D2 and ground?

Can you confirm the resistance between pin #8 (Vcc) and pin #4 (ground) of U12, both on the PCB and on the chip? This will tell us if the Vio supply rail is shorted, or if the chip is shorted, or both.

Datasheets for HDD memory ICs including EEPROM, EPROM, flash:
http://www.users.on.net/~fzabkar/HDD/HD ... Flash.html

I don't understand what you mean by "L1 in shorted". Are you saying that the resistance of L1 is zero? If so, then this is normal. In fact both L2 and L3 should also measure zero ohms.

BTW, when you say "did not work", what EXACTLY do you mean? Did the drive spin up? Did you perhaps install U12 backwards??? (pin #1 is not a supply pin)

_________________
A backup a day keeps DR away.

The 320GB drive had a shorted 5V TVS diode. This means that the drive sustained an overvoltage on the +5V supply. If R67 measures open circuit, then there is a real chance that the preamp was damaged. But you stated that "in the case of patient 320 pcb shorted diode d3 only", so does this mean that R67 measures zero ohms?

BTW, is this your board?
http://pcb-hdd.com/images/PCB%20WD6400A ... EV%20A.JPG

_________________
A backup a day keeps DR away.

If correct. In shorted c65, c45, c52, c49, c59 and another capacitor near D1/L2

If is identical except that the patient WD5000AAKX PCB and donor pcb have no SK1.

The patient WD5000AAKX PCB has no L3 think that because of this there is no resistance between ground and the diode d2.

The donor WD5000AAKX PCB has these resistance values between D2 and ground. This if you have the inductor L3

black in gnd: 109 >| 001
red in gnd: no value >| 001

The donor WD5000AAKX PCB have u12 chip 25X20BLNIG in pcb. 672 ohm inverse 108 ohm

The patient WD5000AAKX PCB not have u12 chip 25X20BLNIG in pcb. 647ohm inverse 107ohm. Chip donnor 514 ohm inverse 1441 ohm out PCB.

In the 2 pcb WD3200AAJS have their soldiers rom chip gives the same values 481 ohm inverse no value.

If I understand that it is normal inductors have continuity but this has continuity to ground.

If seems to spin a few sounds but is not detected only usb bridge is detected.

Do not install the chip backwards assures me that the point of the chip coincide with the white dot in the pcb.

Yes R67 00.8 ohm and R64 00.8 ohm in 320GB drive pcb.

If identical, except that mine card if you have rom chip U12.

Thanks for the help.

If the 320GB patient PCB has a ROM at U12, and if there is no internal problem with the drive, then a PCB swap and ROM transfer should have solved your problem. The fact that the patient drive spins up with donor PCB and patient ROM suggests that your ROM transfer was successful. Therefore it appears that the drive has internal problems.

The short circuits that you measured on the 500GB patient PCB indicate that there is a shorted component on the Vcore supply, most probably a bad MCU. The ROM would be powered from the Vio supply which appears to be OK. Unfortunately the MCU on the patient PCB contains the embedded ROM code, so even transferring the MCU to a donor PCB would not work for you. In any case your donor is not a match, unless you reconfigure certain resistors to tell the MCU to look for an external ROM rather than internal. At least that's how I understand it.

BTW, it would have helped a lot if you had provided full photos, and if you had created separate threads for each drive.

_________________
A backup a day keeps DR away.

If that seems as it has a clicking.

Hope it's not the MCU. Try searching again, which causes this short since I had a case recently that was just a capacitors.

How could I do this?

If I get a borrowed camera I will put some pictures of my pcb. You're right it was better to open separate issues.

The possibility exists that some donor pcb this bad as well, although not detect a shorted capacitor or other component.

If you want I can take other measures voltage or resistance, to deepen the Ingieneria reverse a little more . Maybe I can not repair my HDD but some data will serve to other people and there is not much information on these models.

That's interesting. I used to see a lot of short-circuit failures in disc ceramic capacitors, but I haven't seen too many in the MLCCs, although my colleagues in the electronics repair game are reporting numerous problems with them. Apparently these problems are the result of manufacturing stresses. Why don't you just remove the capacitors one at a time and hope that the short goes away? The board would probably function without the bypass capacitors at the MCU.


Compare the resistors and capacitors around the MCU. Some locations will be populated, while others will be vacant.


Yes, that would be interesting. I would start by taking the 500GB donor and measuring the voltages at L1 and L2, and the anode of D2.

BTW, you might find the following article helpful.

Tutorial - Linear and Switchmode Regulators used in HDDs:
http://malthus.zapto.org/viewtopic.php?f=59&t=231

_________________
A backup a day keeps DR away.

Hello sorry for the delay.

That's what I'll try when I have some time.


There is something I have noticed in the power supply that I use on hdd came with a converter ide/sata to usb. In this psu I measure AC current is this normal?

In 5v wires, I measure 11.4v ac and dc 5.41v

In 12v wires, I measure 26.4V ac and dc 12.15v

The +2.5V and +1.2V voltages are the Vio and Vcore supplies. The negative preamp supply is -5V.

Your AC measurements make no sense to me. Could we see the setup, and could you indicate the measurement points, including the ground reference?

_________________
A backup a day keeps DR away.

My psu is similar to this.

The difference is that I changing the molex connector because the original could be connected with reversed polarity by accident.

Measurement made ​​without the pcb connected to psu molex cable end this only brings a ground wire.

I think this alternating current that comes out of this psu can interfere with the proper functioning of a HDD that is what I have noticed since using this source with my WD1600BEVS sometimes I have to connect several times to be recognized. When I use a standard psu desktop pc is almost always immediately recognized.

So this may be another cause of the 500gb HDD is not recognized. For this try with a atx psu soon to see if it works.

Those AC voltages would seriously damage a HDD. They cannot be correct.

_________________
A backup a day keeps DR away.

I had this PSU few years ago, it blown up and did a lot of smoke.

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My firmware database:
https://mega.nz/folder/O01DkBRI