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SGC-230 TUNER damage

Inside watertight box of the SGC-230 near the power terminals exploded fuse and some damage is visible besides that no damage to the PCB
 
 This SGC-230 tuner is damaged after applying 230AC at the 14VDC connection
.wasn't  me !
 
First investigation showed CPU and most IC's damaged 
 at least those connected to the 14VDC power 
 
A simple 50cent  suppressor diode could have prevented this to happen,
 but no protection was cheaper..

The 5V regulator and the 3 relay driver IC's destroyed ad others  by the high voltage flash .
the relays are tested okay not that many chips involved but the most essential CPU is hard to get.
The SGC factory seems no longer to exist.
Looks like a total loss ...only  chance to save her
With a  programmed CPU or  the V1.03 firmware ?
 possible an ex employee of SGC.The firmware resites in a PC somewhere ?

The  CPU is  MC68HC711E9    I think she is still offered on Ebay

 I hope to replace the controller with an Arduino and K3NG based software

The logic IC's are not expensive  anyway I am trying to salvage this tuner.



the 3 driver chips,UA7805,TC7660(-5V )   removed







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Comments

PE4BAS, Bas said…
230V er op gezet omdat er 230 opstaat natuurlijk, ja ik snap het. Toch zou ik op mijn CG3000 nooit 3000V zetten ;-). 73, Bas
October 20, 2023 at 12:47 PM
pa0o said…
Ja haha zou het misverstand ligt om de hoek
misschien is er nog iemand ergens die de software op zijn PC heeft staan
anders is het wel einde verhaal
of de source code van N7DDC ombouwen....
October 22, 2023 at 2:39 AM
pa0o said…
N7DDC heeft de source niet op github wel de f.w.
October 22, 2023 at 3:08 PM
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