Re: PCB of garage door opener failed: Which PIC is this?

Joachim Wunder wrote:
Hi there,

I have a garage door opener named "Liftboy SMD 3200" which was
installed into my garage back in 1990 (in Germany). I couldn´t get any
information about this garage door opener on the net. The motor
control PCB of it just failed this week. I suspect either any capacity
or the voltage regulator to be the culprit. Does anyone know the
manufacturer of the PCB shown under
http://img255.imageshack.us/img255/9023/cimg0094aq6.jpg ?

Unfortunately, the 40-pin PIC´s type isn´t readable under the sticker
at all ´cause its surface seems to have been scratched off under the
sticker by the manufacturer of the PCB. Yagh. Which PIC is it supposed
to be? There is a Quartz which reads "4.000 SUNNY 7624".

Moreover, the same applies to the 16-pin IC: It´s surface seems to
have been treated by the manufacturer of the PCB, i.e. the exact type
has been completely scratched off on purpose as well. :( Is there any
way to find out which IC it might be?

Please advise.

TIA,
Joachim



The IC will have custom firmware on it so you won't be able to replace it. Chances are unless the regulator has failed in a short circuit and caused the voltage to rise, the chips are probably fine. Check to see if the filter capacitor is shorted, I recently repaired an old Volkswagen ECU that had a shorted electrolytic capacitor filtering the 5V output, resulting in a dead car.
.

Relevant Pages

  • Re: PCB of garage door opener failed: Which PIC is this?
    ... I have a garage door opener named "Liftboy SMD 3200" which was ... control PCB of it just failed this week. ... sticker by the manufacturer of the PCB. ... Chances are unless the regulator has failed in a short circuit and caused ...
    (sci.electronics.repair)
  • Re: PCB of garage door opener failed: Which PIC is this?
    ... I have a garage door opener named "Liftboy SMD 3200" which was ... control PCB of it just failed this week. ... sticker by the manufacturer of the PCB. ... No, the filter capacitor is not shorted, I just measured it. ...
    (sci.electronics.repair)
  • Re: PCB of garage door opener failed: Which PIC is this?
    ... I have a garage door opener named "Liftboy SMD 3200" which was ... control PCB of it just failed this week. ... sticker by the manufacturer of the PCB. ... filter capacitor is shorted, I recently repaired an old Volkswagen ECU ...
    (sci.electronics.repair)
  • PCB of garage door opener failed: Which PIC is this?
    ... I have a garage door opener named "Liftboy SMD 3200" which was ... control PCB of it just failed this week. ... sticker by the manufacturer of the PCB. ...
    (sci.electronics.repair)
  • Re: PCB of garage door opener failed: Which PIC is this?
    ... I have a garage door opener named "Liftboy SMD 3200" which was ... control PCB of it just failed this week. ... or the voltage regulator to be the culprit. ... No, the filter capacitor is not shorted, I just measured it. ...
    (sci.electronics.repair)