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KICKER KX550.3 Amplifier. Part # help..
KICKER KX550.3 Amplifier. Part # help..
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Old 17th October 2020, 10:03 PM   #1
rhempz01 is offline rhempz01  United States
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Default KICKER KX550.3 Amplifier. Part # help..

Kickers three channel amplifier. I need to order these pcb mount vertical 20k potentiometers for the gain.
Does anyone have the part number?
The amplifier on the 2 channel clips badly, customer complained of it cutting in and out. Its something going on with the mute protection curcuit the relay is actually engadging then disengaging. If I ground my scope to the negative speaker speaker terminal. Measures 22k from main ground to speaker and sub -.
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Old 17th October 2020, 10:06 PM   #2
rhempz01 is offline rhempz01  United States
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1
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Old 17th October 2020, 10:07 PM   #3
rhempz01 is offline rhempz01  United States
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Topside 2
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Old 17th October 2020, 10:09 PM   #4
rhempz01 is offline rhempz01  United States
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Class D card
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Old 17th October 2020, 10:09 PM   #5
rhempz01 is offline rhempz01  United States
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Underside pcb
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Old 17th October 2020, 10:15 PM   #6
rhempz01 is offline rhempz01  United States
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Input card/ Potentiometer needed
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Old 18th October 2020, 04:25 PM   #7
PapaZBill is offline PapaZBill  United States
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Quote:
Originally Posted by rhempz01 View Post
Kickers three channel amplifier. I need to order these pcb mount vertical 20k potentiometers for the gain.
Does anyone have the part number?
The amplifier on the 2 channel clips badly, customer complained of it cutting in and out. Its something going on with the mute protection curcuit the relay is actually engadging then disengaging. If I ground my scope to the negative speaker speaker terminal. Measures 22k from main ground to speaker and sub -.
I am working with an 04KX5503 schematic. I think the amp is 02.

Lift R12-10k ohm, this may allow the amp to power up. If so, trace the signal through the input board. It's possibly a bad gain pot.

Channel 2? Is this the left, right or sub channel? Q101 & Q201-J108 are the mute for left and right channels. I doubt it's a muting issue, but check to be sure.
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Old 18th October 2020, 07:31 PM   #8
rhempz01 is offline rhempz01  United States
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I beleive its the pot that is bad as well. Ill still trace it all out and check the mute curcuuts.
Part number for the pot?
I have been searching through pots for days. I would like to just get them ordered. I believe some are 50k, 20k. Anything to get me close.
Right channel and the left

Last edited by rhempz01; 18th October 2020 at 07:55 PM.
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Old 18th October 2020, 07:56 PM   #9
PapaZBill is offline PapaZBill  United States
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Quote:
Originally Posted by rhempz01 View Post
I beleive its the pot that is bad as well. Ill still trace it all out and check the mute curcuuts.
Part number for the pot?
I have been searching through pots for days. I would like to just get them ordered. I believe some are 50k, 20k. Anything to get me close.
Have you tried taking one apart? It's possible to repair them if they are not too damaged.

The part number is not available, however there should be something similar online
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Old 18th October 2020, 08:08 PM   #10
rhempz01 is offline rhempz01  United States
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Yes I clean them i believe it maybe something else. When I ground at left channel ground I can read my sin wave on both channels perfectly. When j ground my scope to the right channel n el ground, the relay will disengage and engage, as the amp draws current back and forth, up to 5amps back down, continuously. Until I pull my ground
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