who does electrical componet repairs anymore?

Just made time to investigate why my engine monitoring system lights are not working. Appears there was a small component failure (fire) does anybody know of a electrical repair business that could repair / replace what ever failed? no more TV repair stores around,

thanks for your assistance.
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Any TV repair shop can probably figure out what is burnt.

 

Can you post details about your car - year and such?
Thanks.
Alden

 

Mark
That was a blowout! It appears that part of the component is still there. Typically capacitors blow like that but you really need the schematic to determine what needs to be fixed. If someone has a module out they may be able to read the value and let you know.

Otherwise its a simple soldering job.

 

In Mass. Call first

 

Looks like a failed transistor, diode or resistor, did it have three legs or two as that is not completely clear in the picture. All of those can have flamy endings by overdose of electrons.
I can easily do repairs but I suspect i'll be located a bit far away from you.

 

BBC Reman can do it. They are located in MA.
I can't provide the link right now, sorry.
You will need the value of the failed component. Maybe someone with the same part can identify it for you.

 

Anyone have a schematic of the check control device ( 1984 Mondial QV) Its not included in the shop manual I have, or in the Electrical manual on line. Can anyone read the value of the fried component in the photo vs. your board? I will try to post a clearer pic in a bit.

Thanks all!

 

Sorry. It's BBA Reman. The other question is what caused it to fail.

 

Sorry. It's BBA Reman......

 

Wouldn't the wiring diagram for this car have the necessary information?

 

Unfortunately, it does not detail the circuit boards and such. Just lets you know which wires go where.
Alden

 

after closer inspection, the charred part had three legs, and the component next to it was also burned in half, I have had the car for almost four years now, and the check control has never worked, I had bigger problems to take care of first, so I am just now getting around to this repair. Completed 65 repairs as of today, thanks in large part to all of you on this F-Chat thread.

Happy 2016 to all

Mark VL

 

"... and the check control has never worked,"

Neither did mine and many others I'm afraid..

enzo52

 

.... mine works!

PS: Maybe 2 of the same transistors as the one pictured below? C879
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looking at the wiring diagram I noticed the plugs were in the wrong position in regards to the three plugs. Not sure if that would cause the failure or not, can't be good.

according to the 84 wiring diagram the plugs from top to bottom of the control unit, it should go red, white black plug in that order according to the wire color code. My unit was installed black red, white for some reason.

 

No wonder it didn't work...
Reversing the black and white plugs puts +12V to the ground connection of the PCB and the ground to the +12V connection. I am sure some components won't appreciate.
The other signals are mostly +12V (milage sensor/ac/lights) or grounds (level/bonnet/brakes sensors)
So all the warnings would be either inop (connecting 2 grounds or 2 +) or false.
Hope this helps a little?
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Well that was not very smart from Ferrari to make the plugs physically identical...
If plugs were switched and voltages went all over the place then any semiconductor can potentially be defective. Fortunately there is nothing expensive or unobtainable on that board. But the problem is the time needed and diagnostics. There are two approaches to this, first being systematic in-circuit measuring, followed by replacement of components and careful tests to see everything is restored. Or the brute force method by simply replacing every semiconductor and other possibly failed components. Usually a combination of both works fastest.
You do need a proper soldering iron because the print is double sided.
It would certainly help if you have experience with in circuit diagnosis of components.
It will be a labor of love, time is the killer here. If you're not going at it yourself then a used good unit -if that can be obtained reasonably- that will probably be cheaper.

 

Thank You!
The only issue I see is, your red plug is on the bottom section and your black plug is on the top connection, my 84 QV wiring diagram shows the color coded wires in the red plug go to the top (closest to the dash) plug and the black plug going to the furthest away plug, with the white in the middle. Am I missing something in this translation?

 

Mark, Ferrari put color stickers at the back of the unit indicating the plug color.
I agree it would have been better to have a physically different plugs...
The color order indicated on my drawing is correct, and corresponds to the Ferrari wiring diagram I have, see below screenshot please.
Red is at the bottom where the 3 full light bars are, black at the top/dashboard side.
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Got it, Thanks for the explanation and your time, much appreciated. Mine did not have the color stickers on it. But I will put them on so the next person doesn't have the same issue.

 

You are most welcome - and good luck with the repair.

 

If the burnt part is the same in the picture from afterburner, it's a Siemens BC879 (I'm not sure what the T7 means though..) , that appears to have been made by a couple of vendors. A quick check shows this as obsolete, but should be easy to either find one on eBay, or cross reference to a current component.