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Onkyo TX-6500mkii - Resistor parallel to power cap

arnold_a1968

arnold_a1968

Member
Hello All,
Wanted to get your thoughts/opinion of my newly recapped Onkyo TX-6500mkii as this receiver is the only receiver/amps that i have owned and used that has this R902 3.9K 2W parallel to one of the power capacitor C903 22,000uF 63V other amps/receiver has mylar capacitors.

All my gears all plugged into a wall socket with an AFCI (similar to GFCI)that it will tripped if there's any arc on the load.
Before recapping those 2 power caps, the AFCI was not tripping but after changing them to higher voltage rating of 80V (same capacitance), the AFCI randomly tripping especially when the receiver is not used for few days. Once i reset the AFCI and turned on the receiver, it power on normally without tripping the AFCI and i can continuously play it for few hours or more.

Any idea why i'm having this issue or any thoughts on that R902 why is it in parallel to one of the capacitor ?
I'm tempted to remove that R902 to see if it will avoid tripping the AFCI but wanted to see anyone's opinion on it.

Thanks and appreciate your messages.

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My Adcom GFA555 II's have 3.9kOhm resistors across all four of the main filter caps, I don't understand why your amp only has them across one side.
 
Does it only trip on power-up?

Since the new caps have the same capacitance, the inrush current shouldn't change.
 
Could just be by chance that after replacing the caps, the AFCI started to go. I use an APC Line-R 1200 voltage regulator "after" a surge protector for extra protection.

Do you have a surge protector?, try putting it in-line. Or try a different outlet.
 
Last edited:
RVT1K said:
My Adcom GFA555 II's have 3.9kOhm resistors across all four of the main filter caps, I don't understand why your amp only has them across one side.
Click to expand...
no idea with Onkyo but my other amp, Yamaha B4, Diatone DA-A10, Sansui Alpha AU-707 does not have a resistor but instead a mylar capacitor for the Yamaha B4
 
Sandman1221 said:
Could just be by chance that after replacing the caps, the AFCI started to go. I use an APC Line-R 1200 voltage regulator "after" a surge protector for extra protection.

Do you have a surge protector?, try putting it in-line. Or try a different outlet.
Click to expand...
i even changed the receiver Fuse to a slow blow type as i thought that i could be just in-rush current but it did not help, AFCI still tripping. i'll try to buy a surge protector and see if it helps.. thanks
 
My guess is that it's pulling more current on startup causing the trip. Fresh caps like to absorb more on startup.
My advice would be to just use a regular outlet, or put in a new AFCI. The more they trip, the weaker they get.
 
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