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Old 22nd September 2011, 08:37 AM   #1
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Default kicker zr360

ok, i'm fixing a zr360, and i just need to replace the power transistors, but the smd resistors are un-readable. does someone have the value for them? they are r89-r94. also the diodes d2;d3 thank you
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Old 22nd September 2011, 08:57 AM   #2
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The gate resistors are 47 ohms.

I don't know what the diodes are but it may be similar to the following kicker amp (DL the PDF file near the bottom of the page). The circuits look similar but you'll have to match them to the circuit since the designations are different.
Kicker DX350 Service Manual free download,schematics,datasheets,eeprom bins,pcb,repair info for test equipment and electronics
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Old 22nd September 2011, 09:55 AM   #3
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thanks, but actually, the zr amps are quite different beasts than the class d dx amps. linear spike-back(?), not push-pul, iirc (put it back together and moved on to the next amps)
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Old 22nd September 2011, 06:35 PM   #4
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I don't think that tiny part of the amp is that much different. Both use push-pull power supplies.
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Old 22nd September 2011, 09:58 PM   #5
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here is what i know of it- the diodes in question are connected to the single trace that runs all 4 fets in parallel, where the dx runs all 4 fets on individual circuits off different ic legs. i think they might be fine, just looked a bit dirty. the fet and smd resistor next to them made a small mess. suppose i can just pull them when the time comes to put the new parts in.
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Old 23rd September 2011, 12:51 AM   #6
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There are two different drive circuits. Two FETs are driven by each drive circuit. The yellow and red arrows show the traces for the two drive circuits (from what I can tell from the photos). You can confirm that both of these go back to independent drive outputs of the 3525 IC.
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