Clamp everything to the heatsink and insert a 10-15 amp fuse in the B+ line before applying power.
If I'm not mistaken, there are two screws in the board that had lockwashers. One is near the B+/ground terminal block. The other is near the small daughterboard. Reinstall both of them with their washers.
If I'm not mistaken, there are two screws in the board that had lockwashers. One is near the B+/ground terminal block. The other is near the small daughterboard. Reinstall both of them with their washers.
No, No lockwashers that I see. It has clips in the center that don't even let the screws bottom out. I am just noticing something, I have my transistors here and two of the IRF 9640 are marked IRF 640. I am sure this passed me over seeing the 640 termination and I bought and installed all IRF 9640. Is this an error on my part or is this an error on kicker. If it is my error in which positions should it use the IRF 640?
Next area, No power up as of yet. The center leg on the 3205 has B+ but no signal on the other two pins.
Next area, No power up as of yet. The center leg on the 3205 has B+ but no signal on the other two pins.
If it has 6 outputs for the class D section, 4 are likely 9640s and the other two 640s. The 3rd leg of all of the 9640s will be directly connected (0 ohms) and the 3rd leg of the 640s will be directly connected.
the board itself looks good. But no rail voltages yet. Everything is replaced. what do you want me to check next?
yes i did. Same as before. Still have 7v on the rcas and 7v on the speaker output and on the kd718 I only get 7v too.
If you insert a 10 amp fuse in the B+ line, does it blow the fuse when you power it up (including remote)?
Give me the DC voltage on all 16 pins of the TL494. Place the black meter probe on chassis ground. Place the red meter probe on the point where you need to measure the voltage.
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 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:
Are you saying that placing the black probe on the large ground terminal of the amp didn't produce any voltage readings?
The voltages aren't correct. I think I know what they are except for 11 which may have been 3.7 (actually pin 6). Look at the following drawing and re-post the numbers.
http://www.bcae1.com/temp/tl494pinconfiguration01.jpg
The voltages aren't correct. I think I know what they are except for 11 which may have been 3.7 (actually pin 6). Look at the following drawing and re-post the numbers.
http://www.bcae1.com/temp/tl494pinconfiguration01.jpg
No, I used a ground terminal on the board that didn't have voltage, but i did use the large terminal. Then I found another ground terminal on the board that was ok and checked out. You say chasis ground and I am a car man so that tells me to look for something other than the supply side or hookups. Anyways, the tl494 does not have a dimple on it. and yes the 11 is 3.7 sorry bout the mixup.
Chassis ground terminal = terminal you connect to the chassis of the vehicle.
Give me the DC voltage on the 5 pins of the vertical board. Left to right, looking at component side of the board.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Give me the DC voltage on the 5 pins of the vertical board. Left to right, looking at component side of the board.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
That's not what it should be. I'll have to get back in the shop to check something before I can tell you what to do next.
Give me the DC voltage on all 14 pins of the LM339. Place the black meter probe on chassis ground. Place the red meter probe on the point where you need to measure the voltage. Be careful. Don't allow your probe to slip and short between the pins of the IC. If the probes aren't sharp, sharpen them. Have the transistors clamped and either a 10 amp fuse or a 2 ohm current limiting resistor in series with the B+ line.
LM339
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:
LM339
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:
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