Now, down to business!
Basically, i'm trying to repair a bulb-failure module in my Toyota - now the module was discontinued by Toyota in 1998 and there are none left anywhere in any stockroom on planet earth, according to them, plus the module was £98. Having looked at the inside of this thing, it's hard to see why they charged so much, other than 'because they can'. Most of the module is composed of standard parts, bar two integrated circuits.
I've found that there are numerous part numbers from different manufacturers, but they all have the same design and function.
Fujitsu call it the MB4210
KEC/Samsung call it the KIA4210SV
Toshiba call it the TC17G005AP-0012
I find its nearly impossible to find these parts from anywhere, although so many dodgy looking IC search engines have said 'sure, we have loads of them', and i've fired off a request/quote, but i'm not overly hopeful.
However, two of the datasheets i've downloaded for the Fujitsu and the KEC parts both give a block diagram of how the IC works internally, so i was thinking about making a circuit that does the same job as the IC if i can't get hold of the original parts.
See the datasheet here: http://keccorp.ru/data/cat_datasheets/KIA4210SV.pdf
Now, theres a Comparator in there, and what looks to be a 3 way OR gate, but because of the 'engrish' transration (ho ho ho), the other functions are somewhat vague and no amount of searching seems to bring up a result.
Could anyone on here possibly point me in the direction of either a) where to buy an obsolete IC (preferably in a the thousands, should i balls up, and for other owners who are at a dead end with finding the module) or b) how to figure out what components are needed to complete the circuit in understandable terms so that i can knock up a PCB that does the same job.
Cheers and TIA!
