Author Topic: Unknown IC on Toshiba HDD PCB  (Read 235 times)

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Offline fzabkar

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Unknown IC on Toshiba HDD PCB
« on: February 17, 2019, 10:50:22 am »
Can anyone recognise the chip at locations IC12 and IC13 on this Toshiba HDD PCB?
https://st.overclockers.ru/images/lab/2018/12/04/1/106_toshiba-10tb-pcb_big.jpg

The chip is an op amp or instrumentation amp (perhaps a dual amp). It amplifies and buffers the output of the piezo shock sensors at MT1 and MT2.

I don't need this information for a repair, but I'd like to add this chip to my database.

http://www.hddoracle.com/viewtopic.php?f=100&t=1577

Thanks.
 

Offline shakalnokturn

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Re: Unknown IC on Toshiba HDD PCB
« Reply #1 on: February 17, 2019, 11:57:50 am »
Would you have a photo where markings can be read better?
 

Offline fzabkar

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Re: Unknown IC on Toshiba HDD PCB
« Reply #2 on: February 17, 2019, 01:11:36 pm »
Sorry, I work mostly from other people's photos. :-)

AFAICT, the markings are ...

93A33
1832H
S29604

I presume that "1832" is a YYWW (year/week) date code. Other Toshiba PCBs use amps made by Rohm, but there is nothing on Rohm's web site that matches the above markings.
 

Offline amyk

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Re: Unknown IC on Toshiba HDD PCB
« Reply #3 on: February 17, 2019, 02:50:29 pm »
It is probably a custom marking.
 


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