Rcf art 315 mk iii

[IGPOVI]

Hello,

I have two burned RCF ART 315 MK III. I found burned L501, L801, and L802 inductors. I don't know values of these inductors. Maybe someone have 315 MK III full schematic?

Thank you.

[nosaj]

Hello,

I have two burned RCF ART 315 MK III. I found burned L501, L801, and L802 inductors. I don't know values of these inductors. Maybe someone have 315 MK III full schematic?

Thank you.

This may help get you on the right track
rcf_art315a_sch.pdf
nosaj

[IGPOVI]

This may help get you on the right track
[ATTACH]56050[/ATTACH]
nosaj

315MKIII thank you, I found this schematic, but its difference. I need MKIII schematic, because MKIII has pulse power supply, and output filter with micro controller. So please if someone have MKIII schematic share it here

[doctor]

These are the BLM21RK102SN1 chip ferrite beads.

[IGPOVI]

These are the BLM21RK102SN1 chip ferrite beads.

Amazing thank you for your response. Maybe you have value of C76 capacitor. I measure on good PCBA and I tink it should be 22pF? Am I right?

[doctor]

You are right. C76 and C77 are 22pF.
There are the capacitors making the crystal 12.288MHz work properly.

As a rule, they do not deteriorate.
If the crystal does not oscillate, try to replace it.
But if the U5 (ADAU1701) does not work, only its replacement helps.

[IGPOVI]

You are right. C76 and C77 are 22pF.
There are the capacitors making the crystal 12.288MHz work properly.

As a rule, they do not deteriorate.
If the crystal does not oscillate, try to replace it.
But if the U5 (ADAU1701) does not work, only its replacement helps.

Hi doctor,
thank you for your response.

Yes I found that U5 is burned. So I ordered new ADAU1701. I see that you have a lot of experience in this amplifier and maybe you could give me more ideas for troubleshooting.


1) I found that that R700 (0ohm) was burned. I think it connect signal input and signal output sockets. Im not sure for that. So maybe you could tell that else can be damage around R700?

2) R106 (3k3) burned, but not lost resistance (only visible damage). And I found that MOS4 (IRFB4019) was damage too. I think its same problem because in schematic R700 should be around some near speaker output connectors.

After my investigation I change:
1)R700
2)R106
3)C76
4)L503, L802, L803
5)MOS3 and MOS4
6) And waiting for U5.

Problem was overvoltage in INPUT. And I found spark effects on PCBA around INPUT connector soldering plates (C76,L503...).

Thank you so much for your good heart and helps.

P.S
If someone have schematic please share it, or send it in me email: i.povilaitis777@gmail.com

[doctor]

See your private messages.