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Rockford Fosgate Punch 160.2
Rockford Fosgate Punch 160.2
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Old 27th August 2013, 12:33 AM   #1
S Merlington is offline S Merlington  United States
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Default Rockford Fosgate Punch 160.2

Is it D203 and D205 that disable's the protection in the right channel??

Or does anyone know which 2 i lift to disable it??

Amp has distorted output on the right channel
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Old 27th August 2013, 02:17 AM   #2
seankane is offline seankane  United States
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Has the amp been previously repaired or is this how it came to you.

Just want some info before stating the obvious.
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Old 27th August 2013, 02:32 AM   #3
S Merlington is offline S Merlington  United States
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It had blown power supply fets with i changed ..

It also had both 540's blown in both channels which i changed along with the drivers for the outputs..
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Old 27th August 2013, 03:21 AM   #4
S Merlington is offline S Merlington  United States
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The right channel wont bias..

So its a bias issue..

I switched the MPS6521 I also switched Q208 and Q218..

with no luck..


where do i go from here?
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Old 27th August 2013, 05:25 AM   #5
seankane is offline seankane  United States
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If you don't have any shorted or open source resistors or if you did, you must have some damage in the protection circuit.

I am assuming you metered the resistors in the area around the blown outputs?

Check the 1A and 2A transistors as well.

If there is a fault sometimes the bias wont set properly.

What resistance do you get from source to drain on each of the outputs?

Its likely a shorted diode marked 5D.
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Old 27th August 2013, 01:06 PM   #6
Perry Babin is offline Perry Babin  United States
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If it's the same as the 160a2 (see photo), it's D202 and D204.
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