Re: ONkyo TX-NR626 Check SP Wire
I replaced all transistors and all electrolytics in the R driver. I have triple checked the SMD and discrete resistors as well.
Idle voltages stay within service manual tolerances even as it heats up!
The voltages across the plus and minus sides of the driver match the L and C channels.
I have even tried reducing all channel idle voltages to 1mv and it still overheats and drops the B voltages in half (you can hear the drop-down voltage relay click in). How can the power transistors get so hot when the idle voltages/currents are so low??
When the B voltages drop in half the unit temp drops to room temp (75F) in a couple minutes.
The heat sink gets so hot (135F) you cannot leave your finger on it. And this is with no input, no volume, and no speaker load.
Thanks.
I replaced all transistors and all electrolytics in the R driver. I have triple checked the SMD and discrete resistors as well.
Idle voltages stay within service manual tolerances even as it heats up!
The voltages across the plus and minus sides of the driver match the L and C channels.
I have even tried reducing all channel idle voltages to 1mv and it still overheats and drops the B voltages in half (you can hear the drop-down voltage relay click in). How can the power transistors get so hot when the idle voltages/currents are so low??
When the B voltages drop in half the unit temp drops to room temp (75F) in a couple minutes.
The heat sink gets so hot (135F) you cannot leave your finger on it. And this is with no input, no volume, and no speaker load.
Thanks.
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