[sane-devel] Canon 4200F USB chip location

[LUH LAH]

Hello there!

Thank you very much for responding.

It seems that I damaged the mainboard when soldering so I cannot
continue any further.

Thanks,

-[K] IMSOASIAN

On 10/21/21, Jörn-Ingo Weigert <jiweigert at gmail.com> wrote:
> Usually with a tool called wireshark (
> https://www.wireshark.org/download.html) and a filter enabled for usb only.
> Depends on your system environment, you maybe have to install a general
> purpose usb driver which enables to debug the usb traffic.
>
> But the last time I used wireshark, it will give you a hint if that is
> needed.
>
> LUH LAH <welpthisdidnotwork at gmail.com> schrieb am Do., 21. Okt. 2021,
> 21:07:
>
>> Hello there!
>>
>> Sorry about that, looks like it was indeed scrubbed.
>>
>> I've instead uploaded them to here:
>>
>> https://drive.google.com/drive/folders/1-n2ABYtWhAGOW18siwKGjOc81Op7IUIA?usp=sharing
>>
>> ------------------
>> How do you capture a USB session?
>>
>> Thanks,
>>
>> -[K] IMSOASIAN
>>
>> On 10/21/21, Ralph Little <skelband at gmail.com> wrote:
>> > Hi,
>> >
>> > On 2021-10-17 7:25 p.m., LUH LAH wrote:
>> >> Hello there!
>> >>
>> >> I recently acquired a Canon 4200F scanner and realized after extensive
>> >> research that the USB chip couldn't be found. So, I opened up and
>> >> de-soldered the mainboard RF shield/Heat Sink to find a bunch of
>> >> chips.
>> >>
>> >> I've attached said images to this message.
>> >>
>> >> My question is, what chip is exactly for the USB port?
>> >>
>> >> Thank you very much!
>> >>
>> >> -[K] IMSOASIAN
>> >>
>> > The scanner is not currently supported by SANE.
>> > We do have a prior report from someone documented here:
>> > http://www.sane-project.org/unsupported/canon-4200f.html
>> >
>> > However, I'm not aware of any active work on this machine.
>> >
>> > The chip marked L6219DS appears to be a PWM motor controller:
>> >
>> https://www.allegromicro.com/-/media/files/datasheets/l6219ds-datasheet.ashx
>> >
>> > The chip marked WM8196SCDS appears to be an ADC for the imager:
>> > https://pdf1.alldatasheet.com/3efc5524-e7be-47c7-99d3-9d2c2ebaba01
>> >
>> > There is a DRAM memory package:
>> > https://www.esmt.com.tw/upload/pdf/ESMT/datasheets/M12L16161A(2R).pdf
>> >
>> > The other chip is probably a microcontroller of some sort, which may
>> > have an integrated USB port.
>> >
>> > Unless you can identify the microcontroller, then analysis of captured
>> > USB sessions using the Windows driver is what you have left.
>> > ---------------
>> >
>> > I didn't get the images that you say that you have attached. They may
>> > have been scrubbed in the submission process.
>> > Perhaps you could reply to the list and myself with the attachment
>> > again?
>> >
>> > Cheers,
>> > Ralph
>> >
>>
>>
>