Homebrew PCBs

So..... WHERE does the printer get the CURRENT DATE from?
and
WHAT IF YOUR PC DATE WAS SET TO THE SAME DATE EVERY TIME YOU TURN IT ON?
WHEN WOULD THE PRINTER DECIDE THE DATE HAS CHANGED?

So the real question here is IF you attach this printer to a PC thats 
sole purpose is to
print PCBs forever on this hacked printer then why would you care if you 
kept the the date
the same and then every time you were ready to print an image you could 
also reset that image creation date so nothing about that image 
attributes would carry into the print driver interogating dates.


On 11/03/2016 08:05 PM, 'Tony Smith' ajsmith1968@... 
[Homebrew_PCBs] wrote:
>
> It\u2019s simpler than that.
>
> No idea of the exact scheme, but it\u2019ll be something like when you put 
> in a new cartridge the printer writes the current date & time 
> (obtained from your PC) to the chips.  When a year has passed it 
> writes \u2018Dead\u2019 to the chip.
>
> You used to be able to reset chips, now you need to get new ones along 
> with your toner refill after the manufacturers closed that \u2018loophole\u2019.
>
> Could be worse, HP at one point were writing the manufacture date to 
> the chips so if you inserted a brand new cartridge you\u2019d had sitting 
> in on your shelf for a while, it would report is as \u2018too old\u2019 and kill 
> it. Nasty.
>
> Tony
>
> *From:*Homebrew_PCBs@yahoogroups.com 
> [mailto:Homebrew_PCBs@yahoogroups.com]
> *Sent:* Friday, 4 November 2016 8:29 AM
> *To:* Homebrew_PCBs@yahoogroups.com
> *Subject:* Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
>
>
>
> If there is a self destruct after one year then there must be a real 
> time clock of some sort, if it's a clock chip then it should be 
> possible to intercept the clock reference by either changing the clock 
> oscillator Cristal for one that has a frequency of 1/2 or 1/4 of the 
> original. If the clock reference is taken from another reference the 
> inserting a device by 2 or 4  IC would do the same. Another option 
> could be to remove the clock backup power source is battery then the 
> clock would always start with its default date/time it just depends on 
> wether the full data time are used or just the day.
>
> My preference would be to use a slower clock reference signal. When I 
> get my printer (just ordered printer) I will look and see if I can 
> find the if there's clock, it could be in the printer or in the cartridge.
>
> Anyone got a view to this approach to extending the usable life of a 
> cartridge.
>
>
>
>
>