Redrum wrote: > I was thinking about this a little bit, and no breakthrough "ah-ha" but > a couple thoughts that might jog someone else's memory, and a few things > to maybe try. > > So, on your radio: > A) Power supply plugged in: > Headphone not plugged in - radio plays through speaker > Headphone plugged in - speaker off, radio plays through > headphones > > B) Power supply unplugged (radio on bat): > *Headphone not plugged in - radio does not play through speaker > (the problem)* > Headphone plugged in - speaker off, radio plays through > headphones > > Is this correct? > > 1) One thing to try, remove the battery, what happens? (Not sure why I > am suggesting this, assume it will play) > > 2) My thought is, the headphone jack is a 4 contact plug/receptical - > right, left, common, switch (receptacle only, senses barrel). The > "switch" is used to detect the presence of the headphones, and switch > the speaker off/headphones on (unless the headphone R/L/C are always > active). The switch is a normally open (NO) or closed (NC). Let's say > it's NO, you might think in B) that perhaps the switch is stuck closed. > However, with the power supply present (A) this contradicts this. > > So, why would the designers have a different signal path and switching > for power than for battery? I would guess that there is an energy > efficiency to gain on battery that is not needed on line power. The > problem is to the best of my knowledge, there is no known radio > schematic. Personally I have not had one apart. > > Maybe someone else has an idea. Until then I might suggest a couple > desperation things: > > 1) Use some deoxit, or even silicone spray on the headphone jack, > insert, twist, remove, repeat > 2) If you feel like opening it up (there are instructions here > somewhere),see if you can find the wire on the jack that is "switch", > should be obvious. See if this changes start if you plug/unplug the > headphone > 3) Do you have another radio to try swapping out ps, battery, etc? Not > sure if you mentioned...(edit, just reread, you do have another radio) > > Best I have for now. I have a radio with a battery here if there is > something you would like me to test > Jim > > Edit - mechanical things are most likely to fail, oxidize, etc. If you > felt like opening up both radios to see if the "switched" contact > behaves differently, might indicate the receptical. But of course, you > could always put the battery in the radio that works! :)
When the Radio is plugged in and playing it continues to play with no disruption if it is unplugged so none of this makes any sense to me even though it has affected some users. Sent from my Pixel 3a using Tapatalk ------------------------------------------------------------------------ slartibartfast's Profile: http://forums.slimdevices.com/member.php?userid=35609 View this thread: http://forums.slimdevices.com/showthread.php?t=116814 _______________________________________________ Radio mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/radio
