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G22000 DC Offset

Kale

Kale

Super Member
I need an information about adjusting DC Offset on the Power part of G22000 receiver... as it stays in protection mode, I cant measure DC Offset on speakers terminal if unit remains in the Protection mode, BIAS is OK... so how I can do adjusting of DC OFFSET on unit with protection mode turned ON?

Kale
 
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Looks like you can check it at R42 on board F-2902 (L-CH) and R42 also on F-2903 (R-CH). Dont say I never done nuthin for ya! These resistors are at the output for the amps. Should be close to the relays.
 
Last edited:
paul79 said:
Looks like you can check it at R42 on board F-2902 (L-CH) and R42 also on F-2903 (R-CH). Dont say I never done nuthin for ya! These resistors are at the output for the amps. Should be close to the relays.
Click to expand...
Thanks! Now I see... :D
BTW, I cant see where is going R44 on the same boards?

I am finished with restoring that power part... here some pictures...

Connection of new capacitors:
20100710_090227_PICT3485.jpg


20100710_090302_PICT3486.jpg


How it was:
20100711_182525_PICT2193_prije.jpg


and now:
20100711_182820_PICT3498_poslij.jpg


power part before:
20100711_183402_PICT3487.jpg


and now with RIKEN and Takman carbon resistors:
20100711_182909_PICT3488_riken_.jpg


MILLS 12Watt emiter resistors:
20100711_183021_PICT3491_mills.jpg
 
Kale, I just responded to your PM. You can measure DC offset at R44 on the power supply board or at the junction of L01/R43.

- Pete
 
paul79 said:
Did you hear a click or what?
Click to expand...

Yes I can hear "click", but it stays in protection mode, I think because of DC Offset... but now I am going to see can I adjust it on R42... its interesting how I didnt see that before :worried:
 
Nice work. Did you replace the main filter caps? It also looks like you are changing the emitter resistors. If memory serves, R44 is the feed for the power meters.

- Pete
 
LBPete said:
Nice work. Did you replace the main filter caps? It also looks like you are changing the emitter resistors. If memory serves, R44 is the feed for the power meters.

- Pete
Click to expand...

Yes, I have replaced them with Rubycon 22000uF/100V
http://www.newark.com/rubycon/100lsw22000m64x119/capacitor-22000-uf-20-100v-capacitor/dp/54M1644

I am always changing emiter resistors with MILLS non inductive resistors, if I have enough space, with Mills 12 Wats, but if not, in that case with 5Wats Mills resistors.
 
Despite problems with WIFI on island I had to tell something: congratulation :thmbsp:
and keep the bottle of Coke away:D
 
Pepa said:
Despite problems with WIFI on island I had to tell something: congratulation :thmbsp:
and keep the bottle of Coke away:D
Click to expand...

Thanks man :) !

You know, how hot is those days at my place, but I didnt capitulate :D
I had one small trouble, I forgot to solder wires for supply of protector circuit :bash:, those two wires on right down side of picture below:

ise77fmpv7adawbmogmg.jpg


Because of that it was in protection mode...
 
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