Re: DX7 Memory Corruption
| Newsgroups | gmane.music.equipment.yamaha-dx |
|---|---|
| Message-ID | <[email protected]> |
Thanks for the explanation. By open circuit you mean the diode is interrupted? But in such case battery will be not connected. When the diode is shorted, it works just as a wire jumper and battery will be connected. Or am I wrong? If I understand well, the function of the diode in this circuit is not to allow voltage to go the battery when the instrument is on, and to allow voltage go from the battery to RAM IC’s when the instrument is off. Is it so? Or does the diode allow to pass some small voltage to the battery when instrument is on, for loading the battery? Probably these type of battery can’t be recharged but I always wondered how it is possible that such backup batteries in instruments can work 25 or more years and still have 3 Volts or little bit less... Daniel Forro > On Sep 4, 2018, at 13:13, [email protected] <mailto:[email protected]> [YamahaDX] <[email protected] <mailto:[email protected]>> wrote: > > A diode can fail by going open circuit, or by becoming practically a short circuit. > > If the diode is open circuit, the battery voltage would still be read as being correct - it just wouldn't provide any backup power to the RAM. > > - Andy >