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#142 

FeedbackLoop
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This Shure PSM300 P3T transmitter did not show any audio level on the display, and the receiver did not show the blue light (but showed the RF level). The fault was traced to a tiny (0402) 1 ohm resistor on the output from the 9V regulator, so that the audio section did not get power.

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15 сен 2024

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Комментарии : 16   
@SellWineNow
@SellWineNow 9 месяцев назад
Dude!!!! A Bass Player brought his P3T to me to fix. This was EXACTLY the same problem. I added a new 1 ohm resistor to the end of the cap + end and then the output of the 9v regulator and it brought it back to life! Getting the top off was harder than the fix. I finally used a plastic wedge shaped like a guitar pick to pry open the top.
@ydonl
@ydonl Год назад
Nice! This will make some musician happy when he wants "More me in the monitor." :)
@frankgrudge8823
@frankgrudge8823 12 дней назад
Cool video 🎉
@jdmccorful
@jdmccorful Год назад
Great job! Good to have a working unit in lieu of schamatic. Excellent!
@sw6188
@sw6188 Год назад
Lucky you were able to repair without a schematic. Shure will not supply any service information to people who are not their "authorized service centres". For that reason I usually refuse to look at their products when someone brings in something that has failed.
@MerlinMerlinL
@MerlinMerlinL Год назад
very clear explanation. thanks
@domovoi_kyzya
@domovoi_kyzya Год назад
Зашел оставить добрый комментарий. Спасибо за ролики!
@andymouse
@andymouse Год назад
Awesome of course!....cheers.
@obedrivera2519
@obedrivera2519 Год назад
Do you fix for people too? I have a transmitter that the same thing happened to and do not work about 1 week ago.
@JUSTBMSC
@JUSTBMSC 11 месяцев назад
Hey man! I'm looking to see how you got the P3T open? I have a problem with my volume knob and was wondering if I could open it and take a look but somehow I cannot get the transmitter open. Care to share how you got its open?
@SellWineNow
@SellWineNow 9 месяцев назад
wedge a guitar pick or plastic pry tool under the plastic where the metal top meets the SURE logo. twist while pulling the top toward the rear. It'll pop off. It had me stumped for quite a while!
@gordonwedman3179
@gordonwedman3179 Год назад
Nice work as usual. What would be the purpose of that resistor? Just seems to add a failure point.
@feedback-loop
@feedback-loop Год назад
Might be some low-pass filtering and current spike reducing besides charging that large cap, that has a special circuit for that.
@laoluu
@laoluu Год назад
Would there be a problem with just shortening the resistor? I mean, 1 Ohm, what the heck?
@feedback-loop
@feedback-loop Год назад
Probably would work fine, but why not restore to the original state
@SellWineNow
@SellWineNow 9 месяцев назад
@@feedback-loop 1ohm resisors are used as fuses sometimes. dont short them.
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