power acoustik LFA1 4000d

[ian33]

hi am working on a power acoustik LFA1 4000d amp c176 is missing anyone no the value of that cap?

[Perry Babin]

If no one can help, post a photo of the inside of the amp and I'll see if I have information on a similar amp.

[ian33]

LFA1 4000d

[Perry Babin]

The OVN1-4000 seems to be very similar. On the OVN1-4000 and the OVN1-5500, there is no component installed in that location.

[ian33]

Well this amp came in with a burn PS fet and gate resistor.I will replace them and test for audio,maybe that cap is should not be in that model also.Thanks for the quick reply

[Perry Babin]

The OVN1 amps have a serious design flaw that causes the legs of the FETs to break. If any of the legs were weak, they're likely to break soon. You need to install a support on the top and bottom of the board to sandwich it between the heatsink and the bottom cover to prevent the board from flexing.

[ian33]

You are correct 4 fets had broken legs and started arking when i power it up.After resoldering them the amp power up fine and is playing good audion.I think i will use some silcone to keep the board in place. Thanks

[Perry Babin]

You need to use something to support the board in the middle and that's not going to be difficult to remove if you have to disassemble the amp later.