Q10-12 are the power supply switchers for the full range output IC's.
What do you mean by "it still does not power up correctly"?
What is the Power and Protection light status? Plug in the two LED's that light the diffuser, otherwise w/o them may cause a false protection.
The U100 and U200 TDA8925 will need to be carefully monitored for heat. If you have something that can be placed on top of the chip, such as a block of aluminium or the copper slugs from the chassis. If your not careful you will burn up the IC's. Perry Babin or someone else may have a good solution for this. I will snap a photo of a board I'm working on tomorrow.
What do you mean by "it still does not power up correctly"?
What is the Power and Protection light status? Plug in the two LED's that light the diffuser, otherwise w/o them may cause a false protection.
The U100 and U200 TDA8925 will need to be carefully monitored for heat. If you have something that can be placed on top of the chip, such as a block of aluminium or the copper slugs from the chassis. If your not careful you will burn up the IC's. Perry Babin or someone else may have a good solution for this. I will snap a photo of a board I'm working on tomorrow.
If the ICs heat up, a piece of 1"x3/8" (or similar) insulated (kapton tape) aluminum stock with a single hole drilled in it so it can be bolted on (#6/32 screw and nut) should keep them cool.
i have all of those supply's to build a small heat spreader for the chips to keep them.from burning up.
Ok so with the power supply aot460's all in a good standing. And the the led plugged in the amp will not power up. it draws about 2.4amps and the voltage is pulled down to 3v from (12.85vdc) setting on my supply. Something is short. The protection led is just off.
Ok so with the power supply aot460's all in a good standing. And the the led plugged in the amp will not power up. it draws about 2.4amps and the voltage is pulled down to 3v from (12.85vdc) setting on my supply. Something is short. The protection led is just off.
Do you have both LED's plugged in?
It's possible you have a bad LED. I seem to remember the earlier version of this amp would cause an issue if the LED's where not plugged in or if one had failed.
Despite what status the LED's indicate, check Rails and Drives.
It's possible you have a bad LED. I seem to remember the earlier version of this amp would cause an issue if the LED's where not plugged in or if one had failed.
Despite what status the LED's indicate, check Rails and Drives.
its pulling the voltage down on my supply from 13v all the way to 3v, and draws about 2amps of current.
U21-ADAU1701 is the DSP chip, If the chip is damaged,replacing it may require flashes the FW, I not sure and the code is not available. The better option is to replace the daughter board. Q5-C807 is part of the 5v to 3-3v regulator the DSP Board.