Don't tell me your 465 died?! mine went down several weeks ago, shorted rectifier.
For the FETs with 70v on the drains, you should see 1/2 of that on the source legs. Is that what you have?
If not, are any of the outputs shorted?
If not, post the DC voltage on all legs of the 4080.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
Pin 17:
Pin 18:
Pin 19:
Pin 20:
For the FETs with 70v on the drains, you should see 1/2 of that on the source legs. Is that what you have?
If not, are any of the outputs shorted?
If not, post the DC voltage on all legs of the 4080.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
Pin 17:
Pin 18:
Pin 19:
Pin 20:
Pin 1: 11.85
Pin 2: 12.41
Pin 3: 12.42
Pin 4: -0.485
Pin 5: 12.43
Pin 6: 6.04
Pin 7: -0.284
Pin 8: 4.73
Pin 9: 4.73
Pin 10: 11.81
Pin 11: -0.479
Pin 12: -0.480
Pin 13: -0.488
Pin 14: -0.488
Pin 15: 12.46
Pin 16: 12.47
Pin 17: -0.488
Pin 18: -0.488
Pin 19: 9.45
Pin 20: 9.45
I do get a weird reading in circuit between drain and source on two of them. .1 ohm like I'm touvhing my leads together.
Pin 2: 12.41
Pin 3: 12.42
Pin 4: -0.485
Pin 5: 12.43
Pin 6: 6.04
Pin 7: -0.284
Pin 8: 4.73
Pin 9: 4.73
Pin 10: 11.81
Pin 11: -0.479
Pin 12: -0.480
Pin 13: -0.488
Pin 14: -0.488
Pin 15: 12.46
Pin 16: 12.47
Pin 17: -0.488
Pin 18: -0.488
Pin 19: 9.45
Pin 20: 9.45
I do get a weird reading in circuit between drain and source on two of them. .1 ohm like I'm touvhing my leads together.
I had the same amp few weeks ago. Defect IRF3710, replaced them with IRF3710z. Amp was working ok but hours later blew again the IRF3710z's and power supply mosfets.
Then replaced the HIP4080 also, and all mosfets. Checks also the resisistors near the HIP4080.
Now it's working ok for weeks.
There is still a high pitch noise from the subwoofer, can you confirm this is normal on all these BX1500d? The filtercaps in the outputfilter are ok (capacitance and ESR). With some larger capacitance add the noise is less (...off course)
Then replaced the HIP4080 also, and all mosfets. Checks also the resisistors near the HIP4080.
Now it's working ok for weeks.
There is still a high pitch noise from the subwoofer, can you confirm this is normal on all these BX1500d? The filtercaps in the outputfilter are ok (capacitance and ESR). With some larger capacitance add the noise is less (...off course)
If it sounds like the following file, it's likely normal but would vary from amp to amp. It's caused by not having synchronized oscillators between the power supply and the class D section.
http://www.bcae1.com/temp/cooleditmixedoscillator01.wav
If you have any other questions, please start a new thread.
http://www.bcae1.com/temp/cooleditmixedoscillator01.wav
If you have any other questions, please start a new thread.
That is normal for amplifiers without synchronized oscillators. Only a small number of amps that use the 494 type controller have synchronization. As far as I know, the 1500 doesn't have synchronization.
The noise is rarely a problem when the amp is playing through car subwoofers installed in the trunk of a vehicle.
The noise is rarely a problem when the amp is playing through car subwoofers installed in the trunk of a vehicle.
- 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
- Hifonics BX1500D