I received this amp for repair.
The amp powers up, idle is stable, its not in protect and it produced audio.
Someone has attempted to repair this amp and didnt do a very good job. Although its working I question its reliability.
I am going to reflow the solder on the p/s fets and gate resistors.
The amp is missing 2 outputs, my question is this amp has all IRF640 in it with no IRF9640. Is this how this amp is suppose to be?
Before I replace all the mismatched date coded output fets I want to be sure this amp uses all Irf 640's in the board. I thought they would be IRF640N and IRF9640.
I am beggining to wonder if its even a BXi2006D or a smaller amp in the wrong case??
Can anyone tell me if this amp has the correct outputs installed? I would think if you had IRF640's where the 9640's should be it wouldnt power up???
The amp powers up, idle is stable, its not in protect and it produced audio.
Someone has attempted to repair this amp and didnt do a very good job. Although its working I question its reliability.
I am going to reflow the solder on the p/s fets and gate resistors.
The amp is missing 2 outputs, my question is this amp has all IRF640 in it with no IRF9640. Is this how this amp is suppose to be?
Before I replace all the mismatched date coded output fets I want to be sure this amp uses all Irf 640's in the board. I thought they would be IRF640N and IRF9640.
I am beggining to wonder if its even a BXi2006D or a smaller amp in the wrong case??
Can anyone tell me if this amp has the correct outputs installed? I would think if you had IRF640's where the 9640's should be it wouldnt power up???
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There were at least two versions of this amp. The one with the 11 pin driver board (like you have) drives all N-channel FETs. The one with the longer driver board drives both N and P-channel FETs.
That's the right board for a 2006.
That's the right board for a 2006.
I reflowed the solder to the p/s fets, replaced all the outputs, and removed an un needed jumper someone installed and this baby rocks the old 18.
Is it fairly normal in these amps for the audio driver board to run pretty warm?
Is it fairly normal in these amps for the audio driver board to run pretty warm?
Yes. They run very hot. Much of the heat comes from the two 1D transistors in the center of the board. I build a makeshift heatspreader that seems to help. It's shown on the Class D - Type 7 page if you have the tutorial. If not, email me.
What causes them to run so hot?
Can the circuit be modded or something added to dissapate some of the heat for added life besides the heat spreader?
I will have to e-mail you for the heat spreader, I dont have the tutorial yet.
Can the circuit be modded or something added to dissapate some of the heat for added life besides the heat spreader?
I will have to e-mail you for the heat spreader, I dont have the tutorial yet.
I don't think it can be modified. The transistors are too small to dissipate the heat efficiently.
Schematics
Hello guys! I'm working on one of these amps currently. Does anybody have a schematic for this they're willing to share?
Hello guys! I'm working on one of these amps currently. Does anybody have a schematic for this they're willing to share?
Please don't post in a repair thread that was started by someone else unless you are trying to help them.
Start a new thread if you need help with a repair of your own.
Start a new thread if you need help with a repair of your own.