segunda-feira, 27 de outubro de 2014

ELEKTRONIKA MK-52


















DC-DC converter:


New electrolytic capacitors are needed... the original ones are dry and lost the capacitance.







Repairing...












sábado, 25 de outubro de 2014

TEXAS TI-58C














Toshiba TC5047AP-1 Memory chip replacement arrived.






 
Extract the old defective memory chip.




 




Removing the old chip pins.





Insert and solder the new memory chip.