Processor leds on
Printed From: Speakerplans.com
Category: General
Forum Name: Electro Frying Forum
Forum Description: Talk about drivers, processors and mixers
URL: https://forum.speakerplans.com/forum_posts.asp?TID=106925
Printed Date: 30 March 2023 at 7:02am
Software Version: Web Wiz Forums 12.05 - http://www.webwizforums.com
Topic: Processor leds on
Posted By: cravings
Subject: Processor leds on
Date Posted: 05 March 2022 at 11:11pm
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Fired up a xilica earlier. Yellow input leds on channels 1 and 3 constantly lit. Seems to be working fine, passes audio and all OK, just weird that the leds are on full time. Swapped it out for an old tannoy xta one.. seems fine. Set up the gig, then all leds for output 2 are suddenly lit up permanently. Again, working fine otherwise, but a bit unnerving. Crap photo..  Bit random that similar thing had happened to both at the same time. Anyone any tips for what might cause this? |
Replies:
Posted By: Elliot Thompson
Date Posted: 06 March 2022 at 9:07pm
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Possibly Ultrasonic Frequencies. You should trying swapping what you are feeding into the Xilica/Tannoy processors. If the issue is eliminated, you know the issue is not the Xilica/Tannoy processors. If the issue persists turn off every piece of equipment until the lights are not illuminated. Best Regards, ------------- Elliot Thompson |
Posted By: PISSHEAD
Date Posted: 10 March 2022 at 4:13pm
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Any updates pending? ------------- The 'drunken master' strikes again. |
Posted By: cravings
Date Posted: 10 March 2022 at 4:41pm
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Not really. Opened them both up for a nose. The xta, it's definitely just the front panel. Swapped it with another one to check. Reflowed a few solder joints and stuff but no change. Does seem to be working fine other than that though. And the xilica, nothing obvious. When I put a hot signal in the yellow leds light up more brightly when they should. Again, seems to be working fine otherwise. Bit weird. Elliot, same with no input connections. |
Posted By: Elliot Thompson
Date Posted: 10 March 2022 at 8:43pm
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Have you tried disconnecting every piece of equipment connected (with the exception of the XTA/xilica) in the AC line source? Best Regards, ------------- Elliot Thompson |
Posted By: cravings
Date Posted: 10 March 2022 at 9:18pm
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Yeah they're just on the bench. Nothing else in circuit. As I said on the xta it's definitely a problem with the front panel board that just has the leds and buttons on it. The xilica looks more complicated. It's just leds lit up though. |
Posted By: cravings
Date Posted: 10 March 2022 at 9:22pm
 
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Posted By: Elliot Thompson
Date Posted: 12 March 2022 at 10:26am
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The next thing you can do is connect channel two output to a spectrum analyzer to determine if there are any Ultra High Frequencies passing through the output in which, is not audible to the human ear. If you have an audio interface (sound card) that is capable of delivering 96 kHz (preferably 192 kHz) sample rates you can monitor the outputs using Room EQ Wizard's (REW) Real Time Analyzer (RTA). Best Regards, ------------- Elliot Thompson |
Posted By: Mark James
Date Posted: 12 March 2022 at 12:06pm
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have you tried swearing at it? ------------- me so horny me love you long throw horn loaded for her pleasure |
Posted By: cravings
Date Posted: 12 March 2022 at 12:33pm
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elliot, it's definitely just the front board which is just the leds and mute buttons and channel select switches. the actual processor is working fine. i have 6 of these units so took the front panel off another one and swapped them over to confirm it's only a problem with that board, and nothing to do with the signal chain. it's an electronics problem. was just hoping one of the good repair guys on here could point me towards what might cause that. thanks for your input though. mark... yeah. i have. didn't do anything 
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Posted By: Earplug
Date Posted: 12 March 2022 at 1:59pm
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Weeeelll - there obviously be a driver ic on each channel for the LEDs. Or maybe even just a couple or 3 transistors. That, or something around it has gone wrong. Try find that & change!!  ------------- Earplugs Are For Wimps! |
Posted By: cravings
Date Posted: 12 March 2022 at 3:10pm
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yeah i had a look at that.. it's a little smd thing which i'm not so good with. and the xilica is all smd really. not for me to be meddling with. ah i'll live with them. presuming they keep working otherwise. |
Posted By: Elliot Thompson
Date Posted: 12 March 2022 at 3:43pm
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If you willing to live with it, bear in mind one day that channel will stop functioning when you least expect it. Since you have already explored inside of the unit, try getting your hands on the Service Manual. With the Service Manual and Multi-meter, you will be able to determine the value of various components on the problematic channel. You could could also compare the faulty channel with a non-faulty channel to determine where the values are off on the faulty channel using a Multi-meter. Best Regards, ------------- Elliot Thompson |
Posted By: Earplug
Date Posted: 12 March 2022 at 4:21pm
Yes, smd's are the bane of hobbyists - and people with bad eyes! I also hate the modern boards crammed with components you can hardly see!  ------------- Earplugs Are For Wimps! |
cravings wrote: