Hello everyone, I'm struggling with the repair of a dm500s on which he smoked the D46 component which is basically the diode screen printed with 1N4000 GW immediately behind the power connector but after replacing the decoder does not give any sign of life, what I could check why the rest SEEMS everything in order, no other component burned.
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Dreambox 500s no power on
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Re: Dreambox 500s no power on
UPDATE:
By checking the voltage on both 3.3V and 5V regulators displayed in the picture, I read about 0 volt, then i think that the problem is here, then currently on the board and the regulators I have the 12v only, but missing the other two voltages +3.3v and 5v. I tried to replace both regulators, but the result does not change .... suggestions ???
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Re: Dreambox 500s no power on
Just a note regarding the schematic, its the only one I could find and I know there are different versions and layouts. Here is another part that has some regulators on it
Or get it here http://elektrotanya.com/dreambox_dm5.../download.htmlAttached FilesLast edited by R_J; 11-24-2014, 03:44 PM.
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Re: Dreambox 500s no power on
i have same problem with dm 500s dm is dead i connect another adapter 14v and i burn
33-16 W6 point, C422 replace new C422 and still no power no sign of life , and i no have any voltage on capacitor C125 when connect 12v adapter diode is very hot D46 i found dead ceramic capacitor L405 but i don't know corect capacitor NF to replace new one or processor is dead ? please help me sorry for my bad englishLast edited by risting; 09-13-2020, 06:25 AM.
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Re: Dreambox 500s no power on
Originally posted by risting View Posti have same problem with dm 500s dm is dead i connect another adapter 14v and i burn
33-16 W6 point, C422 replace new C422 and still no power no sign of life , and i no have any voltage on capacitor C125 when connect 12v adapter diode is very hot D46 i found dead ceramic capacitor L405 but i don't know corect capacitor NF to replace new one or processor is dead ? please help me sorry for my bad english
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