Hi, today comes to me a Pioneer 2 channel, i dont have the model because the person who leave the amp dont leave the hetsink, only the board.
It has PW of 44z, the outputs are irf540 and irf9540.
Left channel distorted, right channel is OK.
I double check all caps and opamp, drivers transistors and everything is ok.
Im checking the pa2027a and i have this readings with 12.06V on B+ and GND.
PA2027a
pin1: 11.31
pin2: 8.98
pin3: 11.94
pin4: 11.96
pin5: 0.46
pin6: 0.0
pin7: 0.0
pin8: 0.0
pin9: 12.06
pin10: 0.03
pin11: 3.35
pin12: 0.27
pin13: 1.98
pin14: 4.64
pin15: 0.24
pin16: 0.02
I suspect the voltage on the pin 14 is to high.
It has PW of 44z, the outputs are irf540 and irf9540.
Left channel distorted, right channel is OK.
I double check all caps and opamp, drivers transistors and everything is ok.
Im checking the pa2027a and i have this readings with 12.06V on B+ and GND.
PA2027a
pin1: 11.31
pin2: 8.98
pin3: 11.94
pin4: 11.96
pin5: 0.46
pin6: 0.0
pin7: 0.0
pin8: 0.0
pin9: 12.06
pin10: 0.03
pin11: 3.35
pin12: 0.27
pin13: 1.98
pin14: 4.64
pin15: 0.24
pin16: 0.02
I suspect the voltage on the pin 14 is to high.
Hi!
the model is GM-X742, i download the service manual and im reading it.
I switch the channels and the distortion is in the same chanel, the left, so the problem is in the output section, i switch every transistor from side to side, caps, etc, double check resistor, the problem persists in the same chanel.
the model is GM-X742, i download the service manual and im reading it.
I switch the channels and the distortion is in the same chanel, the left, so the problem is in the output section, i switch every transistor from side to side, caps, etc, double check resistor, the problem persists in the same chanel.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- General Interest
- Car Audio
- Pionner 2 chanel distortion on left channel