The 1500 I have here has the original Zeners and they are 12v. The 1000 I had here definitely had 16v Zeners but I don't know if they were the original Zeners. Try to read the numbers off of your diodes if they need replacing.
the original zener diode has C120PH, i cant find info about this diode but i think is 12v and 1 watt, i replace with this diode.
i replace the tip in order and replace the diode, my amp is live¡ but turn on about 30 seconds, anything is burned but it dont had sound¡ green led is on, relay click's when turn on the headunit, everything is ok but no sound.
when i turn on the first time the wofer sounds really bad, the wofer is ok so i assume my amp has a bad cap or something like that, i dont have osciloscope to check the output
i replace the tip in order and replace the diode, my amp is live¡ but turn on about 30 seconds, anything is burned but it dont had sound¡ green led is on, relay click's when turn on the headunit, everything is ok but no sound.
when i turn on the first time the wofer sounds really bad, the wofer is ok so i assume my amp has a bad cap or something like that, i dont have osciloscope to check the output
Do you have approximately positive and negative 12v on the third leg of the first two TIP transistors and approximately 5v on the third leg of the last TIP transistor?
I think that bussbar (labeled as a rail in the photo) is connected to the output filter inductor. If that's true, it shouldn't have any DC on it. When the amp is powered up, does the relay engage?
What is the DC voltage on that bussbar when the amp is powered up?
What is the DC voltage on that bussbar when the amp is powered up?
the relays engage, and the voltage in the busbar is -1.5v, and in the output has the same voltage.
the output mosfets has the -90 and 90 aprox. voltage in the legs, these voltages are ok but i dont have output,
i power up my amp one time and it move a sub but the sound is like gritty noise in the sub and after 30 seconds stop. now i dont have any output
i power up my amp one time and it move a sub but the sound is like gritty noise in the sub and after 30 seconds stop. now i dont have any output
Do you have the voltages present on the driver board pins (±15 and +5v)?
Do you still have ±90v of rail on the outputs even though you have no output?
Do you still have 1.5v of DC on the outputs?
What is the DC voltage on the SFB pin on the driver board?
Do you still have ±90v of rail on the outputs even though you have no output?
Do you still have 1.5v of DC on the outputs?
What is the DC voltage on the SFB pin on the driver board?
hi
i replace 2 caps for the output, the c109 cap and the cap near to the output connector, now my amp is charging good the caps and maintains the power, so i only need to replace a diode, near to the third tip because i change this diode but with other size and now the third tip41 is sending about 9 volts to the driver board and this voltage should be 5volts.
i will tell you what happen
i replace 2 caps for the output, the c109 cap and the cap near to the output connector, now my amp is charging good the caps and maintains the power, so i only need to replace a diode, near to the third tip because i change this diode but with other size and now the third tip41 is sending about 9 volts to the driver board and this voltage should be 5volts.
i will tell you what happen
hi, i test my amp and now have output but only for 20 seconds¡ , i will to change the 3 diodes near to the tip's, they should be 12volts not 16v, because this diodes send the 12 and -12volts to the driver board, and one smd zener near the 3rd tip i need to replace this with 5v zener, because this zener send the other 5v to the same board.
ok, i will check that, but i put a 5.6 zener in that position and only send 3.8v to the board and when i put other of 6.8v the tip send 6v to the board, but my amp now don't turn on the green light, only engage the relay. i send the amp with a friend who is electronic fixer, so i will to wait what he say.
hi
i have good news, the PS is ok, the voltages are correct but the problem is in the preamp section, the preamp dont send the correct voltages and because of that the amp turn on ok but with no sound, what i need to check in the preamp section??
i have good news, the PS is ok, the voltages are correct but the problem is in the preamp section, the preamp dont send the correct voltages and because of that the amp turn on ok but with no sound, what i need to check in the preamp section??
Is the preamp board producing output on the 'out' pin of the driver board.
If not, confirm that all of the op-amps on the preamp board have both positive and negative supply voltage.
If not, confirm that all of the op-amps on the preamp board have both positive and negative supply voltage.
after leave the amp with my friend, i check the values and the pre has the voltages ok, but the OUT pin has -0.12v
Drive a signal into the amp and see if you have a signal on the out pin.
If you're going to continue to ask for help with repairs, it will save a bit of time if you use the sig file to list the test equipment you have (scope, meter, power supply including current rating). I can't possibly remember who has what. Others should do this also.
If you're going to continue to ask for help with repairs, it will save a bit of time if you use the sig file to list the test equipment you have (scope, meter, power supply including current rating). I can't possibly remember who has what. Others should do this also.
hi, i know this post is very old, but i cant fix this amp yet, but im closer to the problem.
i found the output mosfet driver are faulty, but the problem is i cant find this part in any electronic shop in mexico¡
the part is IR4426, and my doubt is, can i put another driver instead of this? or who is the equivalent for this part number?
Thanks¡¡
i found the output mosfet driver are faulty, but the problem is i cant find this part in any electronic shop in mexico¡
the part is IR4426, and my doubt is, can i put another driver instead of this? or who is the equivalent for this part number?
Thanks¡¡
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