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Humming on pfl - Technics SL-1200 Turntable

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50hz hum. Turn off most of your home equipment , turn only your table on, if it still hums it\'s your transformer and that\'s too bad for your wallet. And you also don\'t have those led lights which

is a fashion statement at the moment on your table, they are not quite good for causing distortion. And in your home are saving-lights. especially with dimmers and lcd plasma tv\'s a major cause of distortion. But a steady , low freq hum is your transformer and i have a stethoscope, not for that purpose:). Then you don\'t have to search. But they ain\'t cheap, the upgraded in 2009 ones.

gr richard

Posted on Sep 29, 2014

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Posted on Jan 02, 2017

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Soundcraft spirit sx stuck in pfl mode


Probably one of your PFL switches is stuck in ON.
If not, the digital decoder went kaput.
Also could be your +5V power rail, that one powers the digital stuff...
Good luck.

Nov 11, 2017 | Soundcraft Music

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What could be causing a strange static sounding noise in the headphones only when pressing PFL on any channel.


The "PFL" Stands fo r"Pre Fader Level". Just in case you did not realize. so when you press the "PFL" button , and the red light goes out?, You're saying that the hissing goes away and that you have clarity. Yes? and the volume presents no issues? Also correct? Part of that simply, is with the PFL in the on position. You are engaging the fader for one, which will add to an already boosted signal ( the the fader is turned Up?). also you may have your Clip set incorrectly. to set this you turn PFL off, then at your signal input level Dial (usually at the very top in-line with your fader. _ set the volume on your device, then input clip level on the board \ to where the clip light comes on. not a steady light, but a blinking light so make it steady, then back it off a hair. Okay? this whole time make sure your mains are down. or off at the faders. Once clip is set., PFL is in off position, gradually turn your mains up to level. Now, the PFL is for when you have more than one signal. say from an instrument on another channel. unless you have that? No need to use the PFL. If you do have an instrument in line,. then, before you turn PFL on,make sure that your fader on that channel is turned off. -turn on your PFL, then gradually bring that to level. never messing with the mains level.

I know that is a lot of info. but it is a process. that should eliminate any hissing you may have heard.
Good luck!!
'

Feb 23, 2016 | Allen & Heath AH ZED 12FX 12 Channel Mixer...

1 Answer

Is there a way to get screen mirroring to work with my Philips 55 pfl 4909/f7


Miracast Samsung - Philips - Support Forum

www.supportforum.philips.com > Forum > TV Forum

Jan 2, 2014 - 13 posts - ‎8 authors
I have a PHILIPS 42 PFL 5008H and a Samsung Galaxy S4 ... Samsung havecompletely butchered Miracast support on their ... Now my TV not seeing sgs4 onscreen mirroring but see it on wifi ... They answered me that the miracast function doesn't work with Philips TV ! .... Last Post: 07-11-2014, 11:55 AM ...

How can I do screen mirroring from my Galaxy S6 to a Philips HD ...

forums.androidcentral.com > ... > Samsung Galaxy S6

Apr 12, 2015 - 14 posts - ‎9 authors
First of all I dont know how to enable screen mirroring on my TV. ... You'd have tohave a compatible Samsung Smart TV in order for the built-in wireless screen mirroring to work. ... I have a Samsung smart TV and I tried to connect my phone to it last night. ... If it doesn't, the Chromecast is the best choice.Missing: 55 ‎pfl

Jan 08, 2016 | Philips Televison & Video

1 Answer

Stuck solo pfl


no sticky drinks near mixers ;)
well PFL doesn't affect the sound but it is annoying if it remains on. try to !gently! hammer on the button. I don't know how to explain but the button should be hit fast that it can snap off. maybe like a snap with your fingers.
You can also remove the button's cap and try to pull it out.

Mar 23, 2014 | Mackie 1604 Vlz3 16 Channel Mixer

1 Answer

All I can say is that when I press the pfl button on any fader to listen trough my headphones on the main mix I hear a flicker but only from the main mix. from the sub out it is clear and even from the aux...


Check that the noise is NOT a funtion of an "effect" that the MAIN runs through. Do you hear it via the main amps or is it just in the headphones from the main? Pressing a PFL for a channel should bring ONLY that channel into the headphones UNLESS other PFL's are down... and NOT affect the main. Something is not clear here.

Sep 06, 2011 | Soundcraft MPMi-12 12-channel Audio Mixer

1 Answer

No sound coming out of speakers but lights moving on board


The Efx 12 has two outputs monitor out as well as mix out ( XLR sockets ). If the level bars are moving its an indication that the mixer is working. Have you tried headphones out as well as monitor out.
What is your amplifier and speaker setup- you have not mentioned it at all.
Even if any PFL switch is on you won't get sound out of the speakers.
PFL stands for Post Fade Listen and when any of the 12 channel PFL switch is on only the headphone out put will work.

May 18, 2011 | Soundcraft Efx12 - 12 Channel Sound Board...

1 Answer

Prefader listening light never goes out


The circuitry is a bit complex for that PFL light. The LED is driven by a transistor T38 type BC846 to turn it OFF by grounding out the current coming by way of teh MUTE LED or the MUTE switch (SW14) horts out the MUTE LED. There is a 1K limiting resistor from +15 volts feeding the two LEDS in series.

IF transistor T38 is open the PFL will be on. HOWEVER T38 will also be turned off if transistor T44 (BC846 type NPN) or if capcitor C90 2ufd/50v is shorted OR if resistor R253 is open OR is switch SW8 (PFL DPST )is not contacting the ground side of of the half tied to R247. If R247 is open that will also cause the PFL LED to illuminate...

AND if the signal coming in is at clippling level the PFL LED will light.

All that circuitry serves as a clip detector plus the PFL function.

Verify you are not sending clipping level into the channel first... turn the trim off. If not, you are in for major surgery as all the knobs for that section of the circuit board and the screws for the XLR's and the 1/4 inch jacks must come off as well as some support screws IF it is necessary to access the top side of the board... Maybe you will get lucky and the bad component MIGHT be on the bottom of the board.


May 14, 2010 | Behringer Pmp3000 16 Channel Audio Mixer

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