Hifonics bx1500d

Amp will not start.494 is not getting b+ at pin 12 with remote applied.
Board is tough to trace due to being multi layered.
The sip opamp is also not getting B+.
Half the power supply was blown,not sure if there's a connection between both issues.
There is continuity from remote terminal to a resistor near 494.
Anyone know what's in the remote chain or have a usable schematic?
 

Attachments

  • image.jpg
    image.jpg
    796.9 KB · Views: 148

roshirim

Member
2016-07-11 3:16 pm
Hi Perry Babin.
Sorry for open here mi question..
I get an old bx1500D and it was not turning on. But was due to a bad trace. Now i fixed and it is working but the amplifier I believe that is not carrion the full power. it means when it kicks hard the amplifier goes to protection mode.
The legs of the transistors were verified and are not broken. I don’t know if the IRF3710 could be the root cause. I will replace for the IRF3710Z and I will review.. but if there is any other thing that I need verify please could you let me know.
thank you.
one more question.
Do you know the part number for the TH is a thermal switch or some like that because the mine does not is complete the metal U attached to this TH switch is broken.

thank you
 

roshirim

Member
2016-07-11 3:16 pm
Hi Perry Babin.
Sorry for open here mi question..
I get an old bx1500D and it was not turning on. But was due to a bad trace. Now i fixed and it is working but the amplifier I believe that is not carrion the full power. it means when it kicks hard the amplifier goes to protection mode.
The legs of the transistors were verified and are not broken. I don’t know if the IRF3710 could be the root cause. I will replace for the IRF3710Z and I will review.. but if there is any other thing that I need verify please could you let me know.
thank you.
one more question.
Do you know the part number for the TH is a thermal switch or some like that because the mine does not is complete the metal U attached to this TH switch is broken.

thank you


THe IRF3710Z fixed the protection mode when it is working now the amplifier kicks hard....awesome things with only one kicker L712 at 1ohm.

but if any boydy knows the part number for the thermal switch TH located in the BX1500D board i will appreciate that.