Audio amplifier

[yalect]

Hi,
I have this analog audio power amplifier that contains HXJ2038 ic but it gets heated  when I connect it to the usb port and that increase, when I mesure one its resistor of negative feedback of 22k (as shown on attached picture) with multimetre within the board I found it about 12K!!! but other resistor right because two channel ampifiere ic
There is solution - Idea or  I have to replace that ic?
Regards

[yalect]

Hello,
any answer, please or Idea?
Thank you

[DaJMasta]

Not uncommon for a resistor to measure differently when it's in circuit vs. when it's out, you could desolder it and check again and it would likely be fine.  Its value should match the color code on it... is that schematic for the device being worked on, or is it from the datasheet?  While a production schematic may be similar to datasheet values, it would not be surprising for it to be intentionally different.



In any case, aside from the chip heating up, what is the problem?  Some degree of heat on an amplifier is normal, does it still otherwise function properly?

[yalect]

thank you for your reply
sorry, but that heat is abnormal may that ic is damaged
about the resistor is just proposition I will desolder it