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Old 16th August 2012, 02:48 AM   #1
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Default Kicker ZR240

Is it normal to read 22 ohms between legs 1 and 3 for the outputs?

Just wondering because the left channel the outputs get hot within 2 secs and they all test fine off the board the drivers also all test fine of the board
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Old 16th August 2012, 02:58 AM   #2
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Yes. There is a resistor connected between those legs.

Have you set the bias the same for both channels?
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Old 16th August 2012, 03:02 AM   #3
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I just turned them fully counter clockwise and i will power it up to see if there is still a problem
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Old 16th August 2012, 03:10 AM   #4
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Left Channel plays perfectly now..

Right channel has 30 volts of rail on the output terminals measured directly acroos them
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Old 16th August 2012, 04:26 AM   #5
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If you can't find any defective transistors, the servo op-amp may have failed. It's the TL071 that has two 1M ohm resistors connected to its input terminals.
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Old 16th August 2012, 04:32 AM   #6
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The voltage is pulsing up and down on every pin of it
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Old 16th August 2012, 05:11 AM   #7
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Is this the only place the voltage is pulsing?
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Old 16th August 2012, 12:31 PM   #8
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I was using the ground terminal of the amp and voltage was pulsing..


If i use the non-bridging speaker terminal i see steady voltage on all pins..

TLO71C

Pin 1:-14.73
Pin 2:-15.36
Pin 3:-1.40
Pin 4:-14.30
Pin 5:-14.36
Pin 6:13.89
Pin 7:14.90
Pin 8:0.00
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Old 16th August 2012, 04:30 PM   #9
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For the 1M ohm resistor connected to pin 3, confirm that you read 0 ohms from the end of the resistor that's not connected to pin 3 to the non-bridging terminals.
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Old 16th August 2012, 05:53 PM   #10
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Yes R11 the 1 mega ohm resistor The end of it thats not connected to pin 3 has 0.4 ohms to the non bridging speaker terminal
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