That glue is conductive after it ages, it is not supposed to get to the bottom of the board and in the newer versions they plugged the holes to stop this happening. When you start probing around in it it can start to cause issues with the op amp drive circuit, it is best to take some time and pick all the glue off.
Spot on, that yellow glue goes a brown colour & then becomes conductive, It all needs to be removed or you will have your problem again, Worse glue ever used in electronics to hold parts into place.
So i notice some caps burn did u check them in the area that smoked,signs of burn ? Also the signal light to show the level of music before it limit the green light suppose to be blinking !!!
I have a rcf ART745A, it lights up green, but it doesn't sound when I connect audio to it from the mixer console. but if I connect sound from my laptop if it sounds.
Hi I have the same failed board. the U14 component, near the power supply, an 8pin IC blew up and I don't know what component it is, by any chance can you give me the part number or a schematic?
hello , i have two speackers rcf art 712Mk4 , one of this have an issue, when i rise the volume up after 80% i have big distorsions , i was to an electronist with module and tested on osciloscope he tells me that the pic16f689 is the problem , i'm in Romania and i understand from electronist that the pic must be programed with the correct firmware, can you help me with the link from where to buy the integrat programed? thank you
Pic program ic not the issue. U need to check saparately HF & LF, if HF is working fine after 80% of volume then check in LF ic or surrounding smd component of LF ic can also be possible causes.
That glue is conductive after it ages, it is not supposed to get to the bottom of the board and in the newer versions they plugged the holes to stop this happening. When you start probing around in it it can start to cause issues with the op amp drive circuit, it is best to take some time and pick all the glue off.
Spot on, that yellow glue goes a brown colour & then becomes conductive, It all needs to be removed or you will have your problem again, Worse glue ever used in electronics to hold parts into place.
change the micro controller without reprogramming? These chips are selected by the microcontroller program

do you have a schematic diagram
Great job.
Wish I could bring mine in
THANX Bro
Good warking
So i notice some caps burn did u check them in the area that smoked,signs of burn ? Also the signal light to show the level of music before it limit the green light suppose to be blinking !!!
Gud guru g
Thanx bro
Nice
Thanx bro
E quanto ao processamento dsp continua funcionando, ou precisa reprogramar?
Processamento em Branco Novo? Não funcionam na troca é nem PIC sem reprogramação
I have a rcf ART745A, it lights up green, but it doesn't sound when I connect audio to it from the mixer console. but if I connect sound from my laptop if it sounds.
You mean from your laptop it is working ?
Ic shop link bro
Could you let me know the preamp ic number of htiv300 i want subwoofer out put for using another active subwoofer
Not possible bro
Hi I have the same failed board. the U14 component, near the power supply, an 8pin IC blew up and I don't know what component it is, by any chance can you give me the part number or a schematic?
IR2153S
hello , i have two speackers rcf art 712Mk4 , one of this have an issue, when i rise the volume up after 80% i have big distorsions , i was to an electronist with module and tested on osciloscope he tells me that the pic16f689 is the problem , i'm in Romania and i understand from electronist that the pic must be programed with the correct firmware, can you help me with the link from where to buy the integrat programed? thank you
Pic program ic not the issue. U need to check saparately HF & LF, if HF is working fine after 80% of volume then check in LF ic or surrounding smd component of LF ic can also be possible causes.
@@TKFElectronics the problem seems to be only at LF , can you give me more details for LF IC and how to measured it ? , thank you
what type of mosfet amp is used
N-channel MOSFET is used in Amplifier circuit
Sir aap opera 605 D repair kar sakte ho
Yes
Where to get pic16f689 ic?
Where is your location bro
@@TKFElectronics Indonesia
Sir aap kaha se ho
Mumbai
Sir where to get these ic's from?
Pls mention ic no.
@@TKFElectronics sir I require opamp ics. Namely NJM072B
My dear this is very common ic, u will get anywhere in your local area electronic market, where is your location
@@TKFElectronics sir I'm from Rajasthan. I'll try searching for it but if it's isn't available here, can you courier it to me?
Hi bro hm i paid..when my rcf need to repair on you..the problem is it has no power
The new pic microcontroller is empty, it will not work without firmware. you're just a liar friend
I was thinking the same thing...
why didn't he explain, whether the installed IC was programmed or a new IC, if it is a new IC it is very unlikely.
Hi tkf do you have a email address..i will send to you my module..lets talk
electronicstkf@gmail.com
Email send pls..help