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Hello Everyone!
I’m looking for help regarding our Hotpoint Tumble Dryer TCD980P (UK)
I’m a retired Electronics Engineer, very short on cash, full time carer for my wife, but very capable when it comes to soldering etc, have all the tools I need to repair this.
The transformer shorted out on the control PCB and unfortunately the Micro Controller and EEPROM suffered an over voltage and burned out.
The details of the PCB are:
Controller Module PCB: 09121501096301
SW: 04.05.14
EXTERNAL EEPROM: STMicroelectronics 24C64WPI sourced a very similar PCB from TVF760P as I could not find a programmed used spare anywhere online.
Controller Module PCB: 090221500965501
SW: 3.3.0I salvaged the transformer, EEPROM and Micro Controller and fitted them to the original PCB, and to my surprise the tumble dryer works, Door switch works, starts the motor and begins heating, except the display buttons are largely unresponsive and the Text isn’t correct, etc… and not withstanding we don’t know if the thermostats etc are working correctly, so best not to run it!
I then removed the EEPROM and flashed it with the closest data I could find, which was available from the SkyProg Database website for a TCD970 (28545710000_TCD970P.bin)
This has fixed the buttons and text, but the door switch is not working and therefore cannot start.
Finding the door switch pin on the Microcontroller and hacking it isn’t really an solution here as I believe its very likely other pins are configured differently, we wont know what else is different etc until it runs.. Correct me if I’m wrong please.
What I need is the EEPROM Dump of the TCD980P model, or an already programmed PCB.
I’m aware that these can be programmed by a software suite and Smart Card by an engineer visit, but my enquires locally have not revealed anyone that now does this or confirm they can obtain the data/smartcard. Additionally, I cant really afford to pay an Engineer the call out fee plus Programming expense as times are very hard.
Can anyone help? Perhaps someone has a scrap board for this model and I can purchase/borrow the PCB to dump the EEPROM contents.
Thanks for taking the time to read my post and have a great day!
Kind Regards…
Rik
one of those annoying situations where you bought the dryer but don’t own software so have to buy it again
for the engineer its supplied on a smart card
dont know if its available or if your skills allow you to extract ithttps://www.hotpoint.co.uk/card-tcd980p-8kb-28686790001-j00245230/p
think its this one but do your own research to check
part no is C00278127
the smart card looks like a bank card with similar contacts
Dave
Thanks for your reply Dave!
Perhaps I could extract it but would need to find one first, can’t seem to locate one.
From what I’ve learned, these Smart Cards are a ‘one shot’ access so no room for errors during extraction.The EEPROM is very easy to read from a donor, such a shame we have to go to such efforts to retrieve what we already own.
SkyProg has done a great job of building a repository of EEPROMS, but unfortunately with so many models and it does take a little know how in order to read the EEPROM.
Hopefully someone here can help with a donor or affordable spare.
Have a great day…
kind regards
Rik
often wondered how they make it a one shot device. is it a delete command in the programmer or is it done by the card somehow
must be some way of doing a memory dump off the card if you can decipher it
Dave
electrofix wrote: often wondered how they make it a one shot device. is it a delete command in the programmer or is it done by the card somehow
must be some way of doing a memory dump off the card if you can decipher it
Dave
…most likely the Hotpoint service tool/interface deletes it, simply so the Engineers can’t run a snide side business and deprive Hotpoint of revenue.
I’m not aware of self destructing Smart Cards.
Rik
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