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In Reply to: RE: C-J PF-R preamp: "All digital IC's are blown, not worth repairing" posted by WoodyWW on September 20, 2012 at 10:47:23
It really hurts when something goes up like that: Perhaps your homeowner's insurance will cover?
Unfortunately, the PFR uses relays and a lot of digital switching in order to get the full function remote working. If all of those are blown, then just the labor alone to replace all those parts becomes astronomical. In addition I would guess that the power supply is also pranged as CJ uses IC regulators.
It is always good to have at least a surge protector on your circuits. You can never tell. I had an acquaintance who brought me a Power Wedge grumbling that it just failed after coming home from a trip to the local market. In opening up the unit, I found a 1/2 inch hole blown into the Corcom module from the voltage limiter which had arced from a lightning strike down the street. Considering that he had $6K worth of gear plugged into it, I'd sat it was cheap insurance.
Might be better to list on AA trader as a parts unit, after all, as you point out, it is a nice chassis.
Stu
Follow Ups:
Thanks Stu. I actually have a high deductable on my homeowner's insurance. I might ask if they offer any coverage specifically for electronics (like when you add special, additional coverage on silver, jewelry, & such) that I could add in the future.
2 questions if you have time: Do you think CJ gear in general is more susceptible to this sort of failure? Is ARC or Cary gear for instance more robust? Or is it more related to the CJ pre-amps with remotes?
Also, my house has an old 60 amp fuse box, & none of the outlets are grounded. Would surge protectors even work? (I am using a few right now).
Thanks again!
Also, my house has an old 60 amp fuse box, & none of the outlets are grounded.
It might be a good idea to have an electrician check the earth ground for the electrical service.
Even though you do not have safety equipment grounds your electrical service is still connected to earth for lightning protection....
The earth connection could be broken (open), or badly corroded.
protectors do work. Only trouble is that the fusible element is a one shot deal. You usually have to open up the protector occasionally to double check that it is still intact. There are a few which have an indicator light to show when the over voltage element has been tripped. That element can be changed and people like Digikey and Mouser sell them very cheaply.
To answer your first question, every manufacturer is equally susceptible. The fact of the matter is all integrated circuits are quite sensitive to voltage spikes. If your CJ was a pure tube unit, the damage would not have been so severe.
As an aside, NASA, still only uses 486 computer chips for their space probes, because the pentium chips are so susceptible to over voltage failure caused by cosmic ray strikes.
Grounding your panel and duplex would certainly significantly help also. In terms of long term piece of mind, upgrading your electricals may be more fruitful than the add on devices.
Good luck,
Stu
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