Logicon Box problems FC S2 1987

[2connect]

what can i say prof ?
thanks for all the help info links and advice ...
BRILLIANT!

[Prof]

No worries - glad to be of service - we will all no doubt have to start fixing more and more bits of our electronics on these cars - for those that find the issues first and the solutions - it means the rest of us can benefit.
 
I had to resolder all my connections in the logicon to get the led\'s working, but the rest of mine seemed ok.  I shall watch the motor stall issue though - good heads up. :cheers

[2connect]

Apoligies if people are finding this a bit heavy going to read - the intention will be to produce a simple step by step document for logicon owners that says something like:
 
Air vent direction dont work? then replace: x y x comonents with a b c equivelent components, available from XYZ Shop: You will find em marked T1 D2 ZD3 on the board - (make sure you get em the right way round)
It will leave out all the technical gubbins that the average owner just wont want to know, they just wanna know which new bits to soldler in and where. .... in fact thats actually what I want now really , but as its not out there and its a common problem then somdodys gotta do it aint they?
 
So the end result should be an easy to follow "how to fix document" that goes to the next step beyond just resoldering the dry joints as this wont work for everyone, so basically I\'m with the prof of this one as there are only going to be a limited number of logicons before the ONLY option is to trace & rebuild these circuit faults.
 
I\'m no expert but i know enough of the basics to "have a go" - I might end up with a smoldering pile of duff electronics amd a nervous breakdown - but hey at least i had a go, and if I can nail the bugger then others are sure to benefit, the electronics should cost under a tenner and it should take me no more than a few hours to try once I have the bits - so wish me luck as i wave me tenner goodbye - ha ha :Laugh
 
Right I just need a four hour slot do have a bash now ...
 
2connect

[2connect]

Really a BIG stuggle this problem - anyway landed a new logicon for £25 and now works perfect.
Also found the ROOT cause of the problem ... somebody had tinkerered with the linkage - it wasnt set up right therefore on sertain settings the motor was being held under load > therefore burning out the transistors and or diodes on the pcb... traced the stage (thanks for all the help and info prof) only to find MORE componenets with non transfereable values (NIGHTMARE) anyway in the process gathered some uselfull information for other owners so I will (when i get a chance) type up everything and post it with a view that somebody else may be able to fill in the gaps and finish a "how to fix your logicon" document ... im doing this because it would be nice to think I dint waste 5 days of my life (and othet peoples time) rfor nothing!!!

2connect :cool