Always problems identifying smd diodes



Hallo
i have a dreambox 7020 who does not supplies the lnb.
No voltages, no 13 and no 17 volts.
I suspect a SMD diode marked:
in the first line:
R13
in the second line there is a symbol (i think it is the F of fairchild) and then P731.
I think them are shottky but can you give me any suggestions?
Thank you in advance
Slang
.



Relevant Pages

  • Re: Computer wont stay on...
    ... Next is green wire. ... volts when off, then drop and remain at below 0.8 volts DC when power ... I suspect one is either low or is dropping out. ... voltages must remain above those limits when everything (hard drive, ...
    (microsoft.public.windowsxp.hardware)
  • Re: Serial Port Configuration
    ... typically operates at 10 to 15 volts, ... That was for the old DB25 connector. ... The signal voltages are specified for the transmitter as ...
    (comp.os.linux.hardware)
  • Re: 74LS374 vs. 74LS373 in Apollo 13
    ... I've already checked the voltages and I'm getting a good strong ... drop or rise in the 5 volts so there's your jumping off point. ... It starts to and I can hear the "catch phrase" that usually ... This is my only pinball and I'm bummed because I was going to ...
    (rec.games.pinball)
  • Re: IXYS High Voltage current regulator
    ... I used an IRF640, which is a large-die 400-volt MOSFET, ... 10 volts (note that zener diodes rated near 5.5 to ... for Vin-Vout voltages above about 5V. ... to prevent a small erratic relaxation oscillation ...
    (sci.electronics.design)
  • Re: IXYS High Voltage current regulator
    ... I used an IRF640, which is a large-die 400-volt MOSFET, ... 10 volts (note that zener diodes rated near 5.5 to ... for Vin-Vout voltages above about 5V. ... to prevent a small erratic relaxation oscillation ...
    (sci.electronics.design)