Re: JBL LSR25P amplifier chip overheating
Spray contact cleaner in those hf switches and look to see if you have DC going through those coupling caps between stages. Also if you have a scope look for for oscillation on that hf path
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Re: How to test circuit board battery connection.RS-4i sequential stimulator
Br2330 is not rechargeable and most likely there is no charging circuit so do not expect the voltage to increase on it.I can see couple of regulators , do they get voltage? Is the power button connected to processor ? Does the processor have power?
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Re: Trying to repair an Air fryer EAF383
This board has only a transformerless power supply and power relay it looks like . There is another board for control. Check voltage on the 2 parallel caps c2 and c3 in picture .u1 to L2 circuit makes a buck converter that powers the control circuit. Check voltage on connector to control board.
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Re: Denon AVR-X2500H burnt HDMI5
Ic is very likely but check first those transistors 1011 and 1012 . Also you have some 0ohm resistors that might be there as fusible links that are worth checking 1125,1127,1129
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Re: LG BD560 Won't Spin BR Discs
You need a new pickup. There are 2 laser diodes one for DVD and one for bd . Most likely and very common the bd laser failed
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Re: Panasonic TH-42PX80U 10 Blinks
Look at these 2 workflow charts.they should guide to the bad part. In my experience SS board failed most often on Panasonic plasma....
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Re: What's wrong with my power supply?
Thee are more articles around the web and I just picked this because it explains the circuit a little.
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Re: What's wrong with my power supply?
Look at this link. Like I said seems to be common problem and it is described nicely in this article.... Easier than me explaining step by step. [url]https://www.instructables.com/Fixing-Clicking-Noise-Problem-on-Apple-27-Display/[/url]Re: What's wrong with my power suppl...Display/[/url]
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Re: KRK RP8 G2 pot. problem
Not much to to unfortunately , I think. Only way to rotate is to resolder the pot at different angle, not worth messing with for such a small inconvenience
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Re: Samsung UN75F6300AF help
Check connections to led strips . You might have pinched a cable that goes to ground now or strips are bad and have a connection to ground.unplug them from psu and ohm the wires to ground, they should be open circuit.
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Re: Sony STR-DH520 no optical input
All digital inputs are going to digital interface ic 2006. Check the power for noise/ ripple and you probably did that but reseat connectors on digital board to main board.
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Re: Technics SA-EX310 dead...no sound, no display
Do you get voltage on the power button? If yes make a temporary short to try to start the Amp. During my time with Panasonic I saw switches going bad a lot. Also on this unit the fan and the power amps are the weak parts( not related to your present issue though)
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Re: Denon 3313CI Distorted Audio FL+FR
Does it do it on all the digital inputs? If yes you need to follow path ic406-ic408-ic441. If it is only digital video inputs look mostly at ic101/111/121 depending which input is . Short to ground dafl and dafr signals with 1-10uF capacitor before audio switch to separate the 15 second issue that you noticed. An oscillation in the preamps or dac would overheat the transistors.
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Re: KRK RP8 G2 pot. problem
The hexagonal opening is actually connected to your wiper not an adjustment. Is that soldered crooked on board?
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Re: Sony STR-DH520 no optical input
Any other optical source or Amp to test the TV also? The fact that it works when you change settings on TV would make me look at TV first.
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Re: Aiwa ad-wx 717 belt measure
I bought from Amazon a belt kit that had about 30 different sizes under 10$ . I found the right one for my Sony player in it.
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Re: Sony CFS-5000S radio cassette player no FM reception
Definitely start with contact cleaner in the switches then look for power on the tuner ic , check power supply for ripple that would affect oscillators and create noise...Last edited by Devil_rider; 02-24-2023, 08:48 AM.
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