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S Merlington 16th August 2012 02:48 AM

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

Perry Babin 16th August 2012 02:58 AM

Yes. There is a resistor connected between those legs.

Have you set the bias the same for both channels?

S Merlington 16th August 2012 03:02 AM

I just turned them fully counter clockwise and i will power it up to see if there is still a problem

S Merlington 16th August 2012 03:10 AM

Left Channel plays perfectly now..

Right channel has 30 volts of rail on the output terminals measured directly acroos them

Perry Babin 16th August 2012 04:26 AM

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.

S Merlington 16th August 2012 04:32 AM

The voltage is pulsing up and down on every pin of it

Perry Babin 16th August 2012 05:11 AM

Is this the only place the voltage is pulsing?

S Merlington 16th August 2012 12:31 PM

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

Perry Babin 16th August 2012 04:30 PM

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.

S Merlington 16th August 2012 05:53 PM

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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