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| WD PCB 004-0B41785 Voltage Peak http://forum.hddguru.com/viewtopic.php?f=26&t=45209 |
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| Author: | yuyu057 [ March 25th, 2025, 4:37 ] |
| Post subject: | WD PCB 004-0B41785 Voltage Peak |
Hello, I accidently switched my external power supply with another one, which caused fatal damage to my WD 4TB PCB. Attachment: Capture d’écran 2025-03-25 093112.png [ 168.8 KiB | Viewed 17612 times ] These 2 components are dead so I need to replace them. Can you help me to select the correct ones please ? Can't find them easily by reverse search and google Lens. Thanks in advance. |
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| Author: | fzabkar [ March 25th, 2025, 4:46 ] |
| Post subject: | Re: WD PCB 004-0B41785 Voltage Peak |
"S" is a 4A smt fuse. "Y4" is a 12V TVS diode. You can replace it with SMBJ12A., or you can simply remove it. |
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| Author: | yuyu057 [ March 25th, 2025, 4:47 ] |
| Post subject: | Re: WD PCB 004-0B41785 Voltage Peak |
Well, a big thanks @fzabkar! |
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| Author: | Lardman [ March 25th, 2025, 4:47 ] |
| Post subject: | Re: WD PCB 004-0B41785 Voltage Peak |
This is in the wrong sub BTW. Its a diode and the smaller "S" component is a fuse, fzabkar has detailed information here http://www.hddoracle.com/viewtopic.php?f=100&t=86 about drive overvolt protection. For data recovery fuses can be bridged diodes can be removed - there's a chance it may have blown the preamp too though. You'll probably find it just as cheap to buy a donor pcb and move them as it will be buy 1 of each. |
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| Author: | fzabkar [ March 25th, 2025, 4:51 ] |
| Post subject: | Re: WD PCB 004-0B41785 Voltage Peak |
Lardman wrote: there's a chance it may have blown the preamp too though. That's unlikely in this case. The OP appears to have overvolted the 12V input of an external enclosure. A preamp is at risk when there is an overvoltage on the 5V supply. |
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